//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 24503 SUBJECT: LIGO/Virgo S190512at: Identification of a GW compact binary merger candidate DATE: 19/05/12 19:05:01 GMT FROM: Deep Chatterjee at University of Wisconsin, Milwaukee The LIGO Scientific Collaboration and the Virgo Collaboration report: We identified the compact binary merger candidate S190512at during real-time processing of data from LIGO Hanford Observatory (H1), LIGO Livingston Observatory (L1), and Virgo Observatory (V1) at 2019-05-12 18:07:14.422 UTC (GPS time: 1241719652.422). The candidate was found by the PyCBC Live [1], CWB [2], GstLAL [3], MBTAOnline [4], and spiir [5] analysis pipelines. S190512at is an event of interest because its false alarm rate, as estimated by the online analysis, is 1.9e-09 Hz, or about one in 16 years. The event's properties can be found at this URL: https://gracedb.ligo.org/superevents/S190512at The classification of the GW signal, in order of descending probability, is BBH (99%), Terrestrial (1%), BNS (<1%), NSBH (<1%), or MassGap (<1%). Assuming the candidate is astrophysical in origin, there is strong evidence against the lighter compact object having a mass < 3 solar masses (HasNS: <1%). Using the masses and spins inferred from the signal, there is strong evidence against matter outside the final compact object (HasRemnant: <1%). One skymap is available at this time and can be retrieved from the GraceDB event page: * bayestar.fits.gz, an updated localization generated by BAYESTAR [6], distributed via GCN notice about 53 minutes after the candidate. For the bayestar.fits.gz skymap, the 90% credible region is 399 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 1331 +/- 341 Mpc (a posteriori mean +/- standard deviation). No Preliminary Notice was sent for this event due to a technical problem. For further information about analysis methodology and the contents of this alert, refer to the LIGO/Virgo Public Alerts User Guide . [1] Nitz et al. PRD 98, 024050 (2018) [2] Klimenko et al. PRD 93, 042004 (2016) [3] Messick et al. PRD 95, 042001 (2017) [4] Adams et al. CQG 33, 175012 (2016) [5] Qi Chu, PhD Thesis, The University of Western Australia (2017) [6] Singer & Price PRD 93, 024013 (2016) //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 24504 SUBJECT: LIGO/Virgo S190512at: IceCube Neutrino Search DATE: 19/05/12 19:08:15 GMT FROM: Claudio Kopper at IceCube/U of Alberta The IceCube Collaboration (http://icecube.wisc.edu/) reports: IceCube has performed a search for track-like muon neutrino events consistent with the sky localization of S190512at-2-Initial in a time range of 1000 seconds centered on the alert event time (2019-05-12 17:58:54.000 UTC to 2019-05-12 18:15:34.000 UTC) during which IceCube was collecting good quality data. No track-like events are found in spatial coincidence with the 90% spatial containment of S190512at calculated from the map circulated in the preliminary notice. IceCube's sensitivity to point sources within the location spanned by the 90% spatial containment of S190512at ranges from 0.029 to 0.568 GeV cm^-2 in a 1000 second time window. The IceCube Neutrino Observatory is a cubic-kilometer neutrino detector operating at the geographic South Pole, Antarctica. The IceCube realtime alert point of contact can be reached at roc@icecube.wisc.edu //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 24507 SUBJECT: LIGO-Virgo S190512at: AGILE MCAL observations DATE: 19/05/12 20:02:58 GMT FROM: Alessandro Ursi at INAF/IAPS A. Ursi (INAF/IAPS), C. Pittori (SSDC, and INAF/OAR), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), M. Cardillo, C. Casentini, G. Piano (INAF/IAPS), F. Lucarelli, F. Verrecchia (SSDC, and INAF/OAR), A. Bulgarelli, V. Fioretti, N. Parmiggiani (INAF/OAS-Bologna), M. Pilia (INAF/OA-Cagliari), F. Longo (Univ. Trieste, and INFN Trieste), report on behalf of the AGILE Team: In response to the LIGO-Virgo GW event S190512at at T0 = 2019-05-12 18:07:14 (UT), a preliminary analysis of the AGILE minicalorimeter (MCAL) data found no data acquisitions related to the event, due to a complete Earth occultation of the S190512at 90% c.l. localization region. The AGILE-MCAL detector is a CsI detector with a 4 pi FoV, sensitive in the energy range 0.4-100 MeV. Additional analysis of AGILE data is in progress. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 24508 SUBJECT: LIGO/Virgo S190512at: INTEGRAL inactive at the time of the event DATE: 19/05/12 20:19:13 GMT FROM: James Rodi at IAPS-INAF Enrico Bozzo, Volodymyr Savchenko, Carlo Ferrigno (ISDC/UniGE, Switzerland) James Rodi, (IAPS-Roma, Italy) Sandro Mereghetti (INAF IASF-Milano, Italy) on behalf of the INTEGRAL multi-messenger collaboration: https://www.astro.unige.ch/cdci/integral-multimessenger-collaboration The INTEGRAL spacecraft has a highly elliptical orbit and the instruments are switched off around the perigee passage, every 2.6 days, to prevent radiation-induced damages. Unfortunately, at the time of the LIGO/Virgo trigger S190512at (2019-05-12 18:07:14.422 UTC) the spacecraft was preparing to start the observations after the perigee passage between the orbits number 2089 and 2090 and no scientific instrument data are available. INTEGRAL observations will restart at approximately 2019-05-13 03:08:07 UTC. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 24512 SUBJECT: LIGO/Virgo S190512at Global MASTER-Net observations report DATE: 19/05/13 00:54:15 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, V.Kornilov, D.Kuvshinov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.V.Chazov, D. Vlasenko (Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow State University) A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory) K. Ivanov, O. Gres, N.M. Budnev, S. Yazev, O. Chuvalaev, V. Poleshchuk (Irkutsk State University) V. Yurkov, A. Gabovich, Yu. Sergienko (Blagoveschensk Educational State University, Blagoveschensk) R. Podesta, Carlos Lopez and F. Podesta (Observatorio Astronomico Felix Aguilar (OAFA)) Hugo Levato and Carlos Saffe (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)) R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres (The Instituto de Astrofisica de Canarias) D. Buckley, S. Potter, A. Kniazev, M. Kotze (South African Astronomical Observatory) MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the LIGO/Virgo S190512at errorbox 3161 sec after trigger time at 2019-05-12 18:59:55 UT, with upper limit up to 20.6 mag. The observations began at zenit distance = 148 deg. The sun altitude is -39.8 deg. MASTER-Tavrida robotic telescope located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the LIGO/Virgo S190512at errorbox 6446 sec after trigger time at 2019-05-12 19:54:40 UT, with upper limit up to 19.9 mag. The observations began at zenit distance = 131 deg. The sun altitude is -23.4 deg. MASTER-IAC robotic telescope located in Spain (IAC Teide Observatory) started inspect of the LIGO/Virgo S190512at errorbox 9407 sec after trigger time at 2019-05-12 20:44:01 UT, with upper limit up to 19.8 mag. Observations started at twilight. The observations began at zenit distance = 149 deg. The sun altitude is -12.9 deg. MASTER-OAFA robotic telescope located in Argentina (OAFA observatory of San Juan National University) started inspect of the LIGO/Virgo S190512at errorbox 16758 sec after trigger time at 2019-05-12 22:46:32 UT, with upper limit up to 18.0 mag. Observations started at twilight. The observations began at zenit distance = 133 deg. The sun altitude is -12.4 deg. The galactic latitude b = -60 deg., longitude l = 98 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/ligo_1.php?id=10364 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 3252 | 2019-05-12 18:59:55 | MASTER-SAAO | ( 16h 45m 26.79s , -26d 34m 45.66s) | C | 180 | 18.3 | 3462 | 2019-05-12 19:03:25 | MASTER-SAAO | ( 16h 45m 34.58s , -26d 34m 29.51s) | C | 180 | 19.1 | 3642 | 2019-05-12 19:03:25 | MASTER-SAAO | ( 16h 45m 34.58s , -26d 34m 29.50s) | C | 540 | 19.9 | Coadd 3672 | 2019-05-12 19:06:55 | MASTER-SAAO | ( 16h 45m 34.73s , -26d 34m 24.33s) | C | 180 | 19.3 | 3881 | 2019-05-12 19:10:25 | MASTER-SAAO | ( 16h 45m 34.89s , -26d 34m 21.30s) | C | 180 | 19.4 | 4653 | 2019-05-12 19:23:17 | MASTER-SAAO | ( 16h 49m 59.86s , -27d 55m 47.86s) | C | 180 | 17.7 | 4870 | 2019-05-12 19:26:53 | MASTER-SAAO | ( 16h 50m 01.24s , -27d 55m 39.33s) | C | 180 | 17.7 | 5087 | 2019-05-12 19:30:31 | MASTER-SAAO | ( 16h 31m 54.79s , -27d 54m 40.37s) | C | 180 | 17.4 | 5314 | 2019-05-12 19:34:18 | MASTER-SAAO | ( 16h 59m 03.66s , -27d 55m 30.83s) | C | 180 | 17.4 | 5557 | 2019-05-12 19:38:21 | MASTER-SAAO | ( 16h 32m 16.40s , -25d 54m 55.95s) | C | 180 | 18.6 | 5776 | 2019-05-12 19:42:00 | MASTER-SAAO | ( 16h 31m 56.97s , -27d 54m 34.35s) | C | 180 | 18.4 | 5994 | 2019-05-12 19:45:38 | MASTER-SAAO | ( 16h 40m 58.92s , -27d 54m 51.03s) | C | 180 | 18.3 | 6408 | 2019-05-12 19:52:31 | MASTER-SAAO | ( 16h 50m 45.98s , -25d 55m 24.69s) | C | 180 | 17.2 | 6537 | 2019-05-12 19:54:40 | MASTER-Tavrida | ( 15h 28m 19.74s , -11d 57m 51.48s) | C | 180 | 18.2 | 6537 | 2019-05-12 19:54:40 | MASTER-Tavrida | ( 15h 34m 49.37s , -12d 1m 17.05s) | C | 180 | 18.2 | 6643 | 2019-05-12 19:56:26 | MASTER-SAAO | ( 16h 58m 58.35s , -25d 55m 18.55s) | C | 180 | 17.1 | 6753 | 2019-05-12 19:58:16 | MASTER-Tavrida | ( 15h 22m 03.21s , - 9d 57m 26.80s) | C | 180 | 17.8 | 6753 | 2019-05-12 19:58:16 | MASTER-Tavrida | ( 15h 28m 30.07s , -10d 0m 49.87s) | C | 180 | 17.8 | 6861 | 2019-05-12 20:00:04 | MASTER-SAAO | ( 16h 59m 06.66s , -27d 55m 17.43s) | C | 180 | 16.8 | 6969 | 2019-05-12 20:01:52 | MASTER-Tavrida | ( 15h 19m 19.82s , -13d 57m 30.91s) | C | 180 | 18.7 | 6969 | 2019-05-12 20:01:52 | MASTER-Tavrida | ( 15h 25m 52.11s , -14d 0m 51.34s) | C | 180 | 18.6 | 7080 | 2019-05-12 20:03:43 | MASTER-SAAO | ( 16h 32m 17.82s , -25d 54m 46.47s) | C | 180 | 17.8 | 7184 | 2019-05-12 20:05:28 | MASTER-Tavrida | ( 15h 34m 47.84s , -12d 1m 19.03s) | C | 180 | 17.3 | 7184 | 2019-05-12 20:05:28 | MASTER-Tavrida | ( 15h 28m 18.67s , -11d 57m 59.81s) | C | 180 | 17.5 | 7296 | 2019-05-12 20:07:20 | MASTER-SAAO | ( 16h 41m 12.64s , -25d 55m 02.35s) | C | 180 | 17.7 | 7400 | 2019-05-12 20:09:03 | MASTER-Tavrida | ( 15h 22m 03.29s , - 9d 57m 49.13s) | C | 180 | 17.4 | 7400 | 2019-05-12 20:09:04 | MASTER-Tavrida | ( 15h 28m 29.99s , -10d 1m 06.81s) | C | 180 | 17.1 | 7513 | 2019-05-12 20:10:56 | MASTER-SAAO | ( 16h 41m 03.33s , -27d 54m 40.83s) | C | 180 | 17.6 | 7730 | 2019-05-12 20:14:33 | MASTER-SAAO | ( 16h 58m 58.36s , -25d 55m 13.53s) | C | 180 | 17.0 | 7947 | 2019-05-12 20:18:10 | MASTER-SAAO | ( 16h 41m 12.29s , -25d 54m 59.56s) | C | 180 | 17.4 | 8166 | 2019-05-12 20:21:49 | MASTER-SAAO | ( 17h 8m 12.20s , -27d 55m 29.24s) | C | 180 | 16.5 | 8382 | 2019-05-12 20:25:26 | MASTER-SAAO | ( 17h 9m 47.38s , -29d 55m 51.75s) | C | 180 | 16.9 | 8603 | 2019-05-12 20:29:06 | MASTER-SAAO | ( 16h 16m 20.90s , -23d 53m 55.54s) | C | 180 | 19.3 | 8822 | 2019-05-12 20:32:45 | MASTER-SAAO | ( 17h 8m 11.31s , -27d 55m 26.78s) | C | 180 | 17.5 | 9039 | 2019-05-12 20:36:23 | MASTER-SAAO | ( 17h 17m 14.71s , -27d 56m 03.24s) | C | 180 | 18.1 | 9257 | 2019-05-12 20:40:00 | MASTER-SAAO | ( 17h 9m 49.24s , -29d 55m 48.45s) | C | 180 | 17.6 | 9475 | 2019-05-12 20:43:38 | MASTER-SAAO | ( 17h 19m 03.08s , -29d 55m 45.82s) | C | 180 | 18.0 | 9497 | 2019-05-12 20:44:01 | MASTER-IAC | ( 15h 42m 47.95s , -15d 55m 56.26s) | C | 180 | 17.5 | 9695 | 2019-05-12 20:47:19 | MASTER-SAAO | ( 16h 16m 20.05s , -23d 53m 55.13s) | C | 180 | 19.5 | 9725 | 2019-05-12 20:47:48 | MASTER-IAC | ( 15h 42m 48.36s , -15d 55m 43.36s) | C | 180 | 17.9 | 9913 | 2019-05-12 20:50:56 | MASTER-SAAO | ( 16h 25m 05.08s , -23d 54m 29.46s) | C | 180 | 19.8 | 9970 | 2019-05-12 20:51:54 | MASTER-IAC | ( 15h 34m 15.90s , -13d 51m 32.58s) | C | 180 | 17.6 | 10131 | 2019-05-12 20:54:34 | MASTER-SAAO | ( 17h 17m 17.16s , -27d 56m 00.28s) | C | 180 | 18.2 | 10198 | 2019-05-12 20:55:41 | MASTER-IAC | ( 15h 34m 16.30s , -13d 52m 02.82s) | C | 180 | 18.1 | 10348 | 2019-05-12 20:58:11 | MASTER-SAAO | ( 17h 19m 04.03s , -29d 55m 43.59s) | C | 180 | 18.2 | 10444 | 2019-05-12 20:59:47 | MASTER-IAC | ( 15h 43m 04.42s , -15d 52m 18.42s) | C | 180 | 18.3 | 10582 | 2019-05-12 21:02:05 | MASTER-SAAO | ( 16h 24m 39.14s , -23d 47m 47.67s) | C | 180 | 19.6 | 10670 | 2019-05-12 21:03:34 | MASTER-IAC | ( 15h 34m 18.01s , -13d 51m 47.75s) | C | 180 | 18.4 | 10802 | 2019-05-12 21:05:45 | MASTER-SAAO | ( 16h 14m 08.32s , -25d 47m 51.43s) | C | 180 | 19.5 | 10903 | 2019-05-12 21:07:26 | MASTER-IAC | ( 15h 26m 24.83s , -15d 51m 38.73s) | C | 180 | 18.3 | 11037 | 2019-05-12 21:09:40 | MASTER-SAAO | ( 16h 33m 50.46s , -23d 54m 34.69s) | C | 180 | 19.6 | 11255 | 2019-05-12 21:13:18 | MASTER-SAAO | ( 16h 51m 24.13s , -29d 55m 25.98s) | C | 180 | 17.8 | 11490 | 2019-05-12 21:17:13 | MASTER-SAAO | ( 16h 14m 08.63s , -25d 47m 24.71s) | C | 180 | 19.6 | 11706 | 2019-05-12 21:20:49 | MASTER-SAAO | ( 16h 23m 01.35s , -25d 47m 33.01s) | C | 180 | 20.2 | 11929 | 2019-05-12 21:24:32 | MASTER-SAAO | ( 16h 33m 25.69s , -23d 48m 07.35s) | C | 180 | 20.0 | 12145 | 2019-05-12 21:28:08 | MASTER-SAAO | ( 16h 42m 12.14s , -23d 48m 18.15s) | C | 180 | 19.9 | 12362 | 2019-05-12 21:31:46 | MASTER-SAAO | ( 16h 50m 58.12s , -29d 48m 06.04s) | C | 180 | 18.0 | 12599 | 2019-05-12 21:35:42 | MASTER-SAAO | ( 17h 0m 37.35s , -29d 55m 26.61s) | C | 180 | 17.4 | 12779 | 2019-05-12 21:35:42 | MASTER-SAAO | ( 17h 0m 37.34s , -29d 55m 26.83s) | C | 540 | 17.6 | Coadd 12835 | 2019-05-12 21:39:39 | MASTER-SAAO | ( 17h 0m 10.81s , -29d 48m 39.81s) | C | 180 | 17.6 | 12877 | 2019-05-12 21:40:20 | MASTER-Tavrida | ( 15h 19m 20.13s , -13d 57m 17.01s) | C | 180 | 15.4 | 12877 | 2019-05-12 21:40:20 | MASTER-Tavrida | ( 15h 25m 52.90s , -14d 1m 04.02s) | C | 180 | 16.0 | 12983 | 2019-05-12 21:42:06 | MASTER-IAC | ( 15h 15m 27.09s , - 7d 51m 33.73s) | C | 180 | 18.5 | 12983 | 2019-05-12 21:42:06 | MASTER-IAC | ( 15h 23m 44.03s , - 7d 54m 44.68s) | C | 180 | 18.6 | 13054 | 2019-05-12 21:43:17 | MASTER-SAAO | ( 16h 23m 04.05s , -25d 48m 00.55s) | C | 180 | 20.2 | 13096 | 2019-05-12 21:44:00 | MASTER-Tavrida | ( 16h 50m 15.84s , -25d 59m 18.28s) | C | 180 | 18.2 | 13096 | 2019-05-12 21:44:00 | MASTER-Tavrida | ( 16h 57m 18.74s , -26d 3m 16.39s) | C | 180 | 17.9 | 13204 | 2019-05-12 21:45:47 | MASTER-IAC | ( 15h 15m 27.40s , - 7d 51m 20.10s) | C | 180 | 18.8 | 13204 | 2019-05-12 21:45:48 | MASTER-IAC | ( 15h 23m 44.17s , - 7d 54m 32.12s) | C | 180 | 19.1 | 13272 | 2019-05-12 21:46:55 | MASTER-SAAO | ( 16h 42m 12.92s , -23d 48m 03.53s) | C | 180 | 20.0 | 13317 | 2019-05-12 21:47:40 | MASTER-Tavrida | ( 15h 11m 56.63s , -11d 56m 42.35s) | C | 180 | 19.3 | 13317 | 2019-05-12 21:47:40 | MASTER-Tavrida | ( 15h 18m 25.83s , -12d 0m 25.31s) | C | 180 | 19.5 | 13441 | 2019-05-12 21:49:45 | MASTER-IAC | ( 15h 26m 24.46s , -15d 51m 37.99s) | C | 180 | 18.7 | 13489 | 2019-05-12 21:50:33 | MASTER-SAAO | ( 17h 0m 11.50s , -29d 48m 21.50s) | C | 180 | 17.8 | 13534 | 2019-05-12 21:51:18 | MASTER-Tavrida | ( 14h 54m 12.82s , - 3d 56m 41.20s) | C | 180 | 19.9 | 13534 | 2019-05-12 21:51:18 | MASTER-Tavrida | ( 15h 0m 34.85s , - 4d 0m 20.88s) | C | 180 | 19.7 | 13708 | 2019-05-12 21:54:11 | MASTER-SAAO | ( 16h 32m 32.12s , -29d 48m 12.02s) | C | 180 | 19.9 | 13709 | 2019-05-12 21:54:12 | MASTER-IAC | ( 15h 15m 26.17s , - 7d 51m 42.09s) | C | 180 | 19.0 | 13709 | 2019-05-12 21:54:12 | MASTER-IAC | ( 15h 23m 43.00s , - 7d 54m 55.85s) | C | 180 | 19.1 | 13755 | 2019-05-12 21:54:58 | MASTER-Tavrida | ( 16h 50m 16.13s , -25d 59m 44.25s) | C | 180 | 18.6 | 13755 | 2019-05-12 21:54:58 | MASTER-Tavrida | ( 16h 57m 18.92s , -26d 3m 42.61s) | C | 180 | 18.1 | 13930 | 2019-05-12 21:57:53 | MASTER-SAAO | ( 14h 52m 13.51s , - 1d 47m 14.02s) | C | 180 | 20.3 | 13936 | 2019-05-12 21:58:00 | MASTER-IAC | ( 14h 50m 34.27s , + 0d 8m 47.26s) | C | 180 | 19.4 | 13936 | 2019-05-12 21:58:00 | MASTER-IAC | ( 14h 58m 47.02s , + 0d 5m 33.75s) | C | 180 | 19.5 | 13975 | 2019-05-12 21:58:39 | MASTER-Tavrida | ( 15h 11m 58.17s , -11d 56m 43.04s) | C | 180 | 19.3 | 13975 | 2019-05-12 21:58:39 | MASTER-Tavrida | ( 15h 18m 27.22s , -12d 0m 27.22s) | C | 180 | 19.4 | 14146 | 2019-05-12 22:01:29 | MASTER-SAAO | ( 14h 52m 14.85s , + 2d 12m 20.55s) | C | 180 | 20.2 | 14158 | 2019-05-12 22:01:41 | MASTER-IAC | ( 14h 55m 27.54s , - 5d 50m 59.81s) | C | 180 | 19.1 | 14171 | 2019-05-12 22:01:55 | MASTER-IAC | ( 15h 3m 42.77s , - 5d 54m 12.35s) | C | 180 | 19.2 | 14194 | 2019-05-12 22:02:17 | MASTER-Tavrida | ( 14h 54m 12.81s , - 3d 56m 21.02s) | C | 180 | 19.7 | 14194 | 2019-05-12 22:02:17 | MASTER-Tavrida | ( 15h 0m 34.72s , - 4d 0m 00.96s) | C | 180 | 19.6 | 14367 | 2019-05-12 22:05:11 | MASTER-SAAO | ( 16h 32m 31.48s , -29d 47m 43.81s) | C | 180 | 19.5 | 14407 | 2019-05-12 22:05:51 | MASTER-IAC | ( 16h 12m 21.65s , -27d 52m 46.04s) | C | 180 | 18.0 | 14410 | 2019-05-12 22:05:54 | MASTER-Tavrida | ( 15h 8m 35.76s , - 1d 56m 57.51s) | C | 180 | 19.6 | 14410 | 2019-05-12 22:05:54 | MASTER-Tavrida | ( 15h 14m 57.14s , - 2d 0m 36.23s) | C | 180 | 19.7 | 14583 | 2019-05-12 22:08:47 | MASTER-SAAO | ( 16h 41m 44.36s , -29d 47m 59.52s) | C | 180 | 18.6 | 14628 | 2019-05-12 22:09:31 | MASTER-Tavrida | ( 15h 13m 02.99s , - 5d 57m 07.81s) | C | 180 | 19.5 | 14628 | 2019-05-12 22:09:31 | MASTER-Tavrida | ( 15h 19m 26.09s , - 6d 0m 49.00s) | C | 180 | 19.5 | 14638 | 2019-05-12 22:09:42 | MASTER-IAC | ( 14h 50m 32.87s , + 0d 8m 45.46s) | C | 180 | 19.4 | 14647 | 2019-05-12 22:09:50 | MASTER-IAC | ( 14h 58m 45.76s , + 0d 5m 33.02s) | C | 180 | 19.5 | 14804 | 2019-05-12 22:12:27 | MASTER-SAAO | ( 14h 52m 13.12s , - 1d 47m 49.66s) | C | 180 | 20.3 | 14849 | 2019-05-12 22:13:12 | MASTER-Tavrida | ( 17h 28m 29.61s , -30d 0m 16.81s) | C | 180 | 17.4 | 14849 | 2019-05-12 22:13:12 | MASTER-Tavrida | ( 17h 35m 48.18s , -30d 4m 18.76s) | C | 180 | 16.4 | 14870 | 2019-05-12 22:13:33 | MASTER-IAC | ( 14h 55m 27.62s , - 5d 51m 21.64s) | C | 180 | 19.1 | 14870 | 2019-05-12 22:13:33 | MASTER-IAC | ( 15h 3m 42.93s , - 5d 54m 33.02s) | C | 180 | 19.2 | 15021 | 2019-05-12 22:16:05 | MASTER-SAAO | ( 15h 0m 15.01s , - 1d 47m 50.27s) | C | 180 | 20.2 | 15065 | 2019-05-12 22:16:49 | MASTER-Tavrida | ( 17h 35m 47.24s , -30d 4m 20.88s) | C | 180 | 16.8 | 15065 | 2019-05-12 22:16:49 | MASTER-Tavrida | ( 17h 28m 28.73s , -30d 0m 18.86s) | C | 180 | 17.5 | 15096 | 2019-05-12 22:17:20 | MASTER-IAC | ( 16h 12m 23.48s , -27d 52m 47.41s) | C | 180 | 18.1 | 15237 | 2019-05-12 22:19:41 | MASTER-SAAO | ( 14h 52m 14.67s , + 2d 12m 22.47s) | C | 180 | 20.2 | 15287 | 2019-05-12 22:20:30 | MASTER-Tavrida | ( 15h 8m 35.84s , - 1d 56m 56.42s) | C | 180 | 19.5 | 15287 | 2019-05-12 22:20:30 | MASTER-Tavrida | ( 15h 14m 57.06s , - 2d 0m 35.08s) | C | 180 | 19.7 | 15325 | 2019-05-12 22:21:09 | MASTER-IAC | ( 14h 42m 46.17s , + 0d 6m 06.44s) | C | 180 | 19.7 | 15326 | 2019-05-12 22:21:09 | MASTER-IAC | ( 14h 34m 33.09s , + 0d 9m 17.49s) | C | 180 | 19.5 | 15459 | 2019-05-12 22:23:22 | MASTER-SAAO | ( 15h 0m 13.87s , + 2d 12m 19.74s) | C | 180 | 20.1 | 15505 | 2019-05-12 22:24:08 | MASTER-Tavrida | ( 15h 13m 03.03s , - 5d 57m 07.32s) | C | 180 | 19.5 | 15505 | 2019-05-12 22:24:08 | MASTER-Tavrida | ( 15h 19m 26.01s , - 6d 0m 48.51s) | C | 180 | 19.4 | 15552 | 2019-05-12 22:24:56 | MASTER-IAC | ( 14h 35m 05.27s , + 2d 8m 57.00s) | C | 180 | 19.4 | 15552 | 2019-05-12 22:24:56 | MASTER-IAC | ( 14h 43m 18.91s , + 2d 5m 46.13s) | C | 180 | 19.4 | 15680 | 2019-05-12 22:27:03 | MASTER-SAAO | ( 16h 41m 45.12s , -29d 48m 25.98s) | C | 180 | 18.3 | 15725 | 2019-05-12 22:27:48 | MASTER-Tavrida | ( 17h 28m 30.01s , -30d 0m 26.19s) | C | 180 | 17.5 | 15725 | 2019-05-12 22:27:48 | MASTER-Tavrida | ( 17h 35m 48.53s , -30d 4m 27.11s) | C | 180 | 17.5 | 15784 | 2019-05-12 22:28:47 | MASTER-IAC | ( 14h 36m 43.12s , + 4d 8m 55.23s) | C | 180 | 19.2 | 15784 | 2019-05-12 22:28:47 | MASTER-IAC | ( 14h 44m 57.88s , + 4d 5m 43.81s) | C | 180 | 19.2 | 15903 | 2019-05-12 22:30:46 | MASTER-SAAO | ( 16h 41m 46.51s , -29d 48m 33.59s) | C | 180 | 18.6 | 15941 | 2019-05-12 22:31:24 | MASTER-Tavrida | ( 17h 35m 47.58s , -30d 4m 27.59s) | C | 180 | 17.7 | 16015 | 2019-05-12 22:32:38 | MASTER-IAC | ( 14h 34m 33.79s , + 0d 9m 16.43s) | C | 180 | 19.6 | 16015 | 2019-05-12 22:32:38 | MASTER-IAC | ( 14h 42m 47.30s , + 0d 6m 05.66s) | C | 180 | 19.8 | 16123 | 2019-05-12 22:34:27 | MASTER-SAAO | ( 15h 0m 15.16s , - 1d 47m 54.93s) | C | 180 | 20.3 | 16158 | 2019-05-12 22:35:02 | MASTER-Tavrida | ( 17h 12m 59.32s , -32d 0m 25.40s) | C | 180 | 17.5 | 16158 | 2019-05-12 22:35:02 | MASTER-Tavrida | ( 17h 20m 26.90s , -32d 4m 26.82s) | C | 180 | 18.0 | 16238 | 2019-05-12 22:36:21 | MASTER-IAC | ( 14h 35m 05.06s , + 2d 9m 15.22s) | C | 180 | 19.4 | 16248 | 2019-05-12 22:36:31 | MASTER-IAC | ( 14h 43m 18.96s , + 2d 6m 04.56s) | C | 180 | 19.4 | 16341 | 2019-05-12 22:38:04 | MASTER-SAAO | ( 15h 0m 13.87s , + 2d 11m 59.19s) | C | 180 | 20.2 | 16375 | 2019-05-12 22:38:39 | MASTER-Tavrida | ( 17h 31m 52.29s , -32d 0m 55.05s) | C | 180 | 18.4 | 16376 | 2019-05-12 22:38:39 | MASTER-Tavrida | ( 17h 39m 19.96s , -32d 4m 57.56s) | C | 180 | 17.8 | 16486 | 2019-05-12 22:40:29 | MASTER-IAC | ( 14h 36m 41.91s , + 4d 8m 52.69s) | C | 180 | 19.2 | 16487 | 2019-05-12 22:40:30 | MASTER-IAC | ( 14h 44m 56.78s , + 4d 5m 41.78s) | C | 180 | 19.4 | 16559 | 2019-05-12 22:41:43 | MASTER-SAAO | ( 15h 9m 54.73s , - 3d 48m 14.73s) | C | 180 | 20.1 | 16709 | 2019-05-12 22:44:13 | MASTER-IAC | ( 15h 1m 00.52s , + 4d 5m 25.87s) | C | 180 | 19.3 | 16709 | 2019-05-12 22:44:13 | MASTER-IAC | ( 14h 52m 45.80s , + 4d 8m 36.97s) | C | 180 | 19.1 | 16779 | 2019-05-12 22:45:23 | MASTER-SAAO | ( 15h 44m 12.80s , -15d 47m 51.36s) | C | 180 | 19.8 | 16848 | 2019-05-12 22:46:32 | MASTER-OAFA | ( 14h 59m 39.62s , - 7d 55m 21.66s) | C | 180 | 16.6 | 16937 | 2019-05-12 22:48:00 | MASTER-IAC | ( 15h 43m 08.86s , -11d 52m 03.52s) | C | 180 | 18.9 | 16937 | 2019-05-12 22:48:00 | MASTER-IAC | ( 15h 51m 32.12s , -11d 55m 13.87s) | C | 180 | 19.3 | 16996 | 2019-05-12 22:48:59 | MASTER-SAAO | ( 15h 51m 55.91s , -13d 48m 22.85s) | C | 180 | 19.9 | 17163 | 2019-05-12 22:51:47 | MASTER-IAC | ( 15h 36m 45.04s , - 9d 51m 56.09s) | C | 180 | 19.1 | 17163 | 2019-05-12 22:51:47 | MASTER-IAC | ( 15h 45m 05.06s , - 9d 55m 07.76s) | C | 180 | 19.2 | 17215 | 2019-05-12 22:52:38 | MASTER-SAAO | ( 15h 9m 54.72s , - 3d 48m 10.49s) | C | 180 | 20.2 | 17389 | 2019-05-12 22:55:33 | MASTER-IAC | ( 15h 0m 59.09s , + 4d 5m 20.96s) | C | 180 | 19.3 | 17430 | 2019-05-12 22:56:14 | MASTER-SAAO | ( 15h 17m 54.05s , - 3d 48m 13.84s) | C | 180 | 20.0 | 17630 | 2019-05-12 22:59:34 | MASTER-IAC | ( 15h 43m 08.86s , -11d 52m 26.26s) | C | 180 | 18.9 | 17630 | 2019-05-12 22:59:34 | MASTER-IAC | ( 15h 51m 32.19s , -11d 55m 36.92s) | C | 180 | 19.3 | 17648 | 2019-05-12 22:59:52 | MASTER-SAAO | ( 15h 44m 12.99s , -15d 48m 27.64s) | C | 180 | 19.8 | 17859 | 2019-05-12 23:03:22 | MASTER-IAC | ( 15h 36m 46.20s , - 9d 51m 59.00s) | C | 180 | 19.1 | 17865 | 2019-05-12 23:03:29 | MASTER-SAAO | ( 15h 52m 33.01s , -15d 48m 36.23s) | C | 180 | 19.9 | 17866 | 2019-05-12 23:03:30 | MASTER-IAC | ( 15h 45m 06.18s , - 9d 55m 10.62s) | C | 180 | 19.2 | 18081 | 2019-05-12 23:07:05 | MASTER-SAAO | ( 15h 51m 56.05s , -13d 48m 23.23s) | C | 180 | 19.9 | 18100 | 2019-05-12 23:07:23 | MASTER-IAC | ( 16h 22m 07.75s , -25d 56m 05.47s) | C | 180 | 18.6 | 18100 | 2019-05-12 23:07:23 | MASTER-IAC | ( 16h 13m 01.28s , -25d 52m 54.13s) | C | 180 | 18.6 | 18193 | 2019-05-12 23:08:57 | MASTER-OAFA | ( 14h 39m 44.46s , + 6d 5m 29.85s) | C | 180 | 17.5 | 18298 | 2019-05-12 23:10:41 | MASTER-SAAO | ( 16h 0m 09.30s , -13d 48m 30.52s) | C | 180 | 20.2 | 18333 | 2019-05-12 23:11:16 | MASTER-IAC | ( 16h 4m 42.33s , -19d 52m 59.37s) | C | 180 | 18.6 | 18333 | 2019-05-12 23:11:16 | MASTER-IAC | ( 16h 13m 25.37s , -19d 56m 11.76s) | C | 180 | 18.9 | 18426 | 2019-05-12 23:12:49 | MASTER-OAFA | ( 14h 47m 47.88s , + 6d 4m 58.67s) | C | 180 | 17.5 | 18515 | 2019-05-12 23:14:19 | MASTER-SAAO | ( 15h 17m 53.81s , - 3d 48m 58.89s) | C | 180 | 20.1 | 18556 | 2019-05-12 23:14:59 | MASTER-IAC | ( 16h 0m 29.77s , -21d 52m 54.71s) | C | 180 | 18.7 | 18556 | 2019-05-12 23:15:00 | MASTER-IAC | ( 16h 9m 19.81s , -21d 56m 06.78s) | C | 180 | 18.9 | 18655 | 2019-05-12 23:16:38 | MASTER-OAFA | ( 15h 7m 44.47s , - 7d 55m 22.59s) | C | 180 | 17.7 | 18735 | 2019-05-12 23:17:58 | MASTER-SAAO | ( 15h 52m 33.09s , -15d 48m 51.85s) | C | 180 | 19.9 | 18798 | 2019-05-12 23:19:02 | MASTER-IAC | ( 16h 13m 02.72s , -25d 52m 54.75s) | C | 180 | 18.7 | 18798 | 2019-05-12 23:19:02 | MASTER-IAC | ( 16h 22m 09.38s , -25d 56m 07.07s) | C | 180 | 19.1 | 18951 | 2019-05-12 23:21:35 | MASTER-SAAO | ( 16h 0m 10.45s , -13d 48m 42.22s) | C | 180 | 20.2 | 19022 | 2019-05-12 23:22:45 | MASTER-IAC | ( 16h 13m 25.58s , -19d 55m 53.12s) | C | 180 | 19.0 | 19023 | 2019-05-12 23:22:46 | MASTER-IAC | ( 16h 4m 42.23s , -19d 52m 41.19s) | C | 180 | 18.8 | 19171 | 2019-05-12 23:25:14 | MASTER-SAAO | ( 15h 35m 25.98s , -13d 49m 01.46s) | C | 180 | 20.2 | 19254 | 2019-05-12 23:26:38 | MASTER-IAC | ( 16h 0m 28.24s , -21d 52m 56.20s) | C | 180 | 18.8 | 19255 | 2019-05-12 23:26:38 | MASTER-IAC | ( 16h 9m 18.65s , -21d 56m 08.11s) | C | 180 | 18.9 | 19390 | 2019-05-12 23:28:53 | MASTER-SAAO | ( 15h 27m 36.70s , -15d 48m 43.07s) | C | 180 | 20.2 | 19570 | 2019-05-12 23:28:53 | MASTER-SAAO | ( 15h 27m 36.70s , -15d 48m 43.07s) | C | 540 | 20.6 | Coadd 19482 | 2019-05-12 23:30:26 | MASTER-IAC | ( 16h 17m 44.65s , -21d 53m 21.34s) | C | 180 | 18.7 | 19482 | 2019-05-12 23:30:26 | MASTER-IAC | ( 16h 26m 34.96s , -21d 56m 33.96s) | C | 180 | 19.0 | 19669 | 2019-05-12 23:33:33 | MASTER-SAAO | ( 17h 7m 34.70s , -25d 49m 46.93s) | C | 180 | 18.3 | 19708 | 2019-05-12 23:34:11 | MASTER-IAC | ( 15h 27m 37.69s , - 5d 51m 54.70s) | C | 180 | 19.2 | 19708 | 2019-05-12 23:34:11 | MASTER-IAC | ( 15h 35m 53.31s , - 5d 55m 06.49s) | C | 180 | 19.4 | 19832 | 2019-05-12 23:36:15 | MASTER-OAFA | ( 15h 31m 57.69s , - 7d 56m 13.25s) | C | 180 | 17.5 | 19890 | 2019-05-12 23:37:13 | MASTER-SAAO | ( 15h 35m 27.97s , -13d 49m 00.98s) | C | 180 | 20.2 | 19931 | 2019-05-12 23:37:54 | MASTER-IAC | ( 15h 53m 10.68s , -17d 52m 28.25s) | C | 180 | 19.0 | 19931 | 2019-05-12 23:37:54 | MASTER-IAC | ( 16h 1m 48.21s , -17d 55m 38.66s) | C | 180 | 19.2 | 20061 | 2019-05-12 23:40:04 | MASTER-OAFA | ( 15h 48m 05.09s , -19d 56m 05.97s) | C | 180 | 17.9 | 20106 | 2019-05-12 23:40:50 | MASTER-SAAO | ( 15h 43m 41.31s , -13d 49m 04.43s) | C | 180 | 19.9 | 20156 | 2019-05-12 23:41:39 | MASTER-IAC | ( 16h 26m 33.69s , -21d 56m 33.90s) | C | 180 | 19.1 | 20156 | 2019-05-12 23:41:39 | MASTER-IAC | ( 16h 17m 43.05s , -21d 53m 23.05s) | C | 180 | 18.7 | 20288 | 2019-05-12 23:43:51 | MASTER-OAFA | ( 15h 6m 54.72s , + 0d 4m 57.83s) | C | 180 | 18.0 | 20324 | 2019-05-12 23:44:28 | MASTER-SAAO | ( 15h 27m 35.93s , -15d 49m 25.49s) | C | 180 | 20.1 | 20381 | 2019-05-12 23:45:24 | MASTER-IAC | ( 15h 27m 37.34s , - 5d 52m 15.40s) | C | 180 | 19.1 | 20381 | 2019-05-12 23:45:24 | MASTER-IAC | ( 15h 35m 53.53s , - 5d 55m 27.50s) | C | 180 | 19.5 | 20519 | 2019-05-12 23:47:42 | MASTER-OAFA | ( 15h 14m 55.13s , + 0d 4m 30.01s) | C | 180 | 17.8 | 20544 | 2019-05-12 23:48:08 | MASTER-SAAO | ( 15h 27m 37.52s , -15d 49m 29.80s) | C | 180 | 19.9 | 20606 | 2019-05-12 23:49:09 | MASTER-IAC | ( 15h 53m 11.41s , -17d 52m 28.02s) | C | 180 | 19.0 | 20606 | 2019-05-12 23:49:09 | MASTER-IAC | ( 16h 1m 49.72s , -17d 55m 38.35s) | C | 180 | 19.2 | 20749 | 2019-05-12 23:51:33 | MASTER-OAFA | ( 15h 31m 58.76s , - 7d 55m 50.17s) | C | 180 | 18.0 | 20760 | 2019-05-12 23:51:44 | MASTER-SAAO | ( 15h 35m 56.40s , -15d 49m 14.04s) | C | 180 | 19.8 | 20827 | 2019-05-12 23:52:51 | MASTER-IAC | ( 15h 36m 20.86s , -17d 52m 08.29s) | C | 180 | 19.1 | 20827 | 2019-05-12 23:52:51 | MASTER-IAC | ( 15h 44m 59.36s , -17d 55m 18.05s) | C | 180 | 19.4 | 20976 | 2019-05-12 23:55:19 | MASTER-OAFA | ( 15h 40m 03.79s , - 7d 55m 41.33s) | C | 180 | 17.7 | 20981 | 2019-05-12 23:55:24 | MASTER-SAAO | ( 17h 7m 35.29s , -25d 49m 44.24s) | C | 180 | 17.8 | 21051 | 2019-05-12 23:56:34 | MASTER-IAC | ( 15h 57m 18.27s , -23d 52m 56.98s) | C | 180 | 18.9 | 21062 | 2019-05-12 23:56:45 | MASTER-IAC | ( 16h 6m 17.60s , -23d 56m 06.15s) | C | 180 | 19.1 | 21198 | 2019-05-12 23:59:02 | MASTER-SAAO | ( 17h 16m 29.27s , -25d 50m 16.02s) | C | 180 | 18.5 | 21205 | 2019-05-12 23:59:08 | MASTER-OAFA | ( 15h 48m 02.82s , -19d 55m 53.18s) | C | 180 | 18.0 | 21286 | 2019-05-13 00:00:29 | MASTER-IAC | ( 16h 49m 50.89s , -23d 54m 11.74s) | C | 180 | 18.8 | 21286 | 2019-05-13 00:00:29 | MASTER-IAC | ( 16h 58m 50.02s , -23d 57m 23.43s) | C | 180 | 18.8 | 21424 | 2019-05-13 00:02:48 | MASTER-SAAO | ( 15h 43m 43.38s , -13d 49m 54.39s) | C | 180 | 19.9 | 21431 | 2019-05-13 00:02:54 | MASTER-OAFA | ( 15h 56m 33.75s , -19d 56m 27.49s) | C | 180 | 18.0 | 21524 | 2019-05-13 00:04:27 | MASTER-IAC | ( 15h 36m 22.41s , -17d 52m 10.18s) | C | 180 | 19.2 | 21524 | 2019-05-13 00:04:27 | MASTER-IAC | ( 15h 45m 00.94s , -17d 55m 20.03s) | C | 180 | 19.4 | 21642 | 2019-05-13 00:06:25 | MASTER-SAAO | ( 15h 35m 56.91s , -15d 49m 35.27s) | C | 180 | 19.9 | 21660 | 2019-05-13 00:06:44 | MASTER-OAFA | ( 15h 14m 55.49s , + 0d 4m 32.86s) | C | 180 | 18.0 | 21749 | 2019-05-13 00:08:12 | MASTER-IAC | ( 16h 6m 17.74s , -23d 55m 48.02s) | C | 180 | 19.2 | 21750 | 2019-05-13 00:08:13 | MASTER-IAC | ( 15h 57m 18.34s , -23d 52m 39.05s) | C | 180 | 19.0 | 21862 | 2019-05-13 00:10:06 | MASTER-SAAO | ( 17h 16m 29.85s , -25d 50m 04.15s) | C | 180 | 18.4 | 21886 | 2019-05-13 00:10:30 | MASTER-OAFA | ( 15h 40m 03.06s , - 7d 55m 39.51s) | C | 180 | 17.8 | 21979 | 2019-05-13 00:12:03 | MASTER-IAC | ( 16h 58m 48.77s , -23d 57m 23.24s) | C | 180 | 18.8 | 21979 | 2019-05-13 00:12:03 | MASTER-IAC | ( 16h 49m 49.44s , -23d 54m 12.70s) | C | 180 | 18.9 | 22079 | 2019-05-13 00:13:43 | MASTER-SAAO | ( 17h 28m 00.67s , -29d 50m 36.50s) | C | 180 | 17.8 | 22114 | 2019-05-13 00:14:18 | MASTER-OAFA | ( 15h 56m 33.07s , -19d 56m 04.52s) | C | 180 | 18.0 | 22202 | 2019-05-13 00:15:46 | MASTER-IAC | ( 16h 31m 24.15s , -29d 53m 46.64s) | C | 180 | 18.6 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 24513 SUBJECT: LIGO/Virgo S190512at: Fermi GBM Observations DATE: 19/05/13 01:19:59 GMT FROM: Suraj Poolakkil at UAH S. Poolakkil (UAH) and C.M. Hui (NASA/MSFC) report on behalf of the Fermi-GBM Team and the GBM-LIGO/Virgo group: For S190512at, and using the updated BAYESTAR skymap, Fermi-GBM was observing 34.7% of the localization probability at event time. There was no Fermi-GBM onboard trigger around the event time of the LIGO/Virgo detection of GW trigger S190512at (GCN 24503). An automated, blind search for short gamma-ray bursts below the onboard triggering threshold in Fermi-GBM also identified no counterpart candidates. The GBM targeted search, the most sensitive, coherent search for GRB-like signals, was run from +/-30 s around merger time, and also identified no counterpart candidates. Part of the LVC localization region is behind the Earth for Fermi, located at RA = 308.1 and Dec = -3.6 with a radius of 67.2 degrees. We therefore set upper limits on impulsive gamma-ray emission. Using the representative soft, normal, and hard GRB-like spectral templates described in arXiv:1612.02395, we set the following 3 sigma flux upper limits over 10-1000 keV, weighted by the remaining visible GW localization probability (in units of erg/s/cm^2): Timescale soft norm hard ----------------------------------------------- 0.128 s: 2.4e-07 4.3e-07 1.0e-06 1.024 s: 5.3e-08 1.1e-07 2.5e-07 8.192 s: 2.3e-08 2.3e-08 8.0e-08 Assuming the median luminosity distance of ~1331 Mpc from the GW detection, we estimate intrinsic luminosity upper limits of (0.8-7.9)E49 erg/s for the soft template, (0.7-12.7)E49 erg/s for the normal template, and (3.9-49.3)E49 erg/s for the hard template over the 1 keV-10 MeV energy range. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 24514 SUBJECT: LIGO/Virgo S190512at: MAXI/GSC Observations DATE: 19/05/13 01:40:49 GMT FROM: Mutsumi Sugizaki at Tokyo Tech./MAXI S. Sugita, M. Serino (AGU), H. Negoro (Nihon U.), M. Sugizaki, N. Kawai (Tokyo Tech), M. Nakajima, W. Maruyama, M. Aoki, K. Kobayashi (Nihon U.), S. Nakahira, T. Mihara, T. Tamagawa, M. Matsuoka (RIKEN), T. Sakamoto, H. Nishida, A. Yoshida (AGU), Y. Tsuboi, W. Iwakiri, R. Sasaki, H. Kawai, T. Sato (Chuo U.), M. Shidatsu (Ehime U.), M. Oeda, K. Shiraishi (Tokyo Tech), S. Ueno, H. Tomida, M. Ishikawa, Y. Sugawara, N. Isobe, R. Shimomukai, M. Tominaga (JAXA), Y. Ueda, A. Tanimoto, S. Yamada, S. Ogawa, K. Setoguchi, T. Yoshitake (Kyoto U.), H. Tsunemi, T. Yoneyama, K. Asakura, S. Ide (Osaka U.), M. Yamauchi, S. Iwahori, Y. Kurihara (Miyazaki U.), T. Kawamuro (NAOJ), K. Yamaoka (Nagoya U.), Y. Kawakubo (LSU) report on behalf of the MAXI team: We examined MAXI/GSC all-sky X-ray images (2-20 keV) after the LVC trigger S190512at at 2019-05-12 18:07:14.422 UTC (GCN 24503). At the trigger time of S190512at, the high-voltage of MAXI/GSC was on, but the FOV was out of the 90% credible region of the bayestar skymap. The first one-orbit (92 min) scan observation with GSC after the event covered 90% of the 90% credible region of the bayestar skymap from 18:33:5 to 19:38:1 UTC (T0+1551 to T0+5457 sec). No significant new source was found in the region in the one-orbit scan observation. A typical 1-sigma averaged upper limit obtained in one scan observation is 20 mCrab at 2-20 keV. If you require information about X-ray flux by MAXI/GSC at specific coordinates, please contact the submitter of this circular by email. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 24515 SUBJECT: LIGO/Virgo S190512at: Fermi-LAT search for a high-energy gamma-ray counterpart DATE: 19/05/13 10:01:22 GMT FROM: Magnus Axelsson at Stockholm U. M. Axelsson (KTH and Stockholm Univ.), D. Kocevski (NASA/MSFC) and F. Dirirsa (Univ. of Johannesburg) report on behalf of the Fermi-LAT collaboration: We have searched data collected by the Fermi Large Area Telescope (LAT) on May 12, 2019, for possible high-energy (E > 100 MeV) gamma-ray emission in spatial/temporal coincidence with the LIGO/Virgo trigger S190512at (GCN 24503). We define "instantaneous coverage" as the integral over the region of the LIGO probability map that is within the LAT field of view at a given a time, and "cumulative coverage" as the integral of the instantaneous coverage over time. At the time of the trigger (T0 = 2019-05-12 18:07:14.422 UTC), the entire LIGO probability region was either obscured by the Earth or outside the Fermi-LAT field of view. Coverage of the region started around T0 + 1000 s, and reached 100% cumulative coverage at approximately T0 + 7 ks. We performed a search for a transient counterpart within the observed region of the 90% contour of the LIGO map in a fixed time window from T0 + 1 ks to T0 + 10 ks. No significant new sources were found. We also performed a search which adapted the time interval of the analysis to the exposure of each region of the sky, and no additional excesses were found. Energy flux upper bounds for the fixed time interval between 100 MeV and 100 GeV for this search vary between 2.5e-10 and 3.5e-9 [erg/cm^2/s]. The Fermi-LAT point of contact for this event is Feraol Dirirsa (fdirirsa@uj.ac.za). The Fermi-LAT is a pair conversion telescope designed to cover the energy band from 20 MeV to greater than 300 GeV. It is the product of an international collaboration between NASA and DOE in the U.S. and many scientific institutions across France, Italy, Japan and Sweden. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 24516 SUBJECT: LIGO/Virgo S190512at: ANTARES neutrino search DATE: 19/05/13 10:16:14 GMT FROM: Damien Dornic at CPPM,France M. Ageron (CPPM/CNRS), B. Baret (APC/CNRS), A. Coleiro (APC/Universite Paris Diderot), M. Colomer (APC/Universite Paris Diderot)), D. Dornic (CPPM/CNRS), A. Kouchner (APC/Universite Paris Diderot), T. Pradier (IPHC/Universite de Strasbourg) report on behalf of the ANTARES Collaboration: Using on-line data from the ANTARES detector, we have performed a follow-up analysis of the recently reported LIGO/Virgo S190512at event using the 90% contour of the initial bayestar probability map provided by the GW interferometers (GCN#24503). The ANTARES visibility at the time of the alert, together with the 50% and 90% contours of the probability map are shown in https://www.cppm.in2p3.fr/~dornic/events_runo3/S190512at.png . Considering the location probability provided by the LIGO/Virgo collaborations, there is a 83% chance that the GW emitter was in the ANTARES **upgoing** field of view at the time of the alert. No up-going muon neutrino candidate events were recorded in the ANTARES sky during a +/- 500s time-window centered on the time (2019-05-12 18:07:14 UT) and in the 90% contour of the S190512at event. The expected number of atmospheric background events in the region visible by ANTARES is 1.6e-4 in the +/- 500s time window. An extended search during +/- 1 hour gives no up-going muon neutrino coincidence. The expected number of atmospheric background events in the region visible by ANTARES is 1.2e-3 in this larger time window. ANTARES is the largest undersea neutrino detector, installed in the Mediterranean Sea, and it is primarily sensitive to neutrinos in the TeV-PeV energy range. At 10 TeV, the median angular resolution for muon neutrinos is about 0.5 degrees. In the range 1-100 TeV ANTARES has a competitive sensitivity to this position in the sky. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 24518 SUBJECT: LIGO/Virgo S190512at: Swift/BAT Counterpart Search DATE: 19/05/13 15:22:16 GMT FROM: Amy Lien at GSFC T. Sakamoto (AGU), S. D. Barthelmy (NASA/GSFC), A. Y. Lien (GSFC/UMBC), D. M. Palmer (LANL), A. A. Breeveld (MSSL-UCL), A. P. Beardmore (U. Leicester), D. N. Burrows (PSU), S. Campana (INAF-OAB), S. B. Cenko (NASA/GSFC), G. Cusumano (INAF-IASF PA), A. D'Ai (INAF-IASFPA), P. D'Avanzo (INAF-OAB), V. D'Elia(ASDC), S. Emery (UCL-MSSL), P. A. Evans (U. Leicester), P. Giommi (ASI), C. Gronwall (PSU), D. Hartmann (Clemson U.), J. A. Kennea (PSU), H. A. Krimm (NSF), N. P. M. Kuin (UCL-MSSL), F. E. Marshall (NASA/GSFC), A. Melandri (INAF-OAB), B. Mingo (U. Leicester), J. A. Nousek (PSU), S. R. Oates (Uni. of Warwick), P. T. O'Brien (U. Leicester), J. P. Osborne (U. Leicester), C. Pagani (U. Leicester), K. L. Page (U.Leicester), M. Perri (ASDC), J. L. Racusin (NASA/GSFC), B. Sbarufatti (INAF-OAB/PSU), M. H. Siegel (PSU), G. Tagliaferri (INAF-OAB), A. Tohuvavohu (PSU), E. Troja (NASA/GSFC/UMCP) report on behalf of the Swift team: We report the search results in the BAT data within T0 +/- 100 s of the LVC event S190512at (LIGO/VIRGO Collaboration GCN Circ. 24503), where T0 is the LVC trigger time (2019-05-12T18:07:14.422 UTC). The center of the BAT FOV at T0 is RA = 92.704 deg, DEC = -30.367 deg, ROLL = 302.899 deg. The BAT Field of View (>10% partial coding) covers 0.00% of the integrated LVC localization probability, and 0.00% of the galaxy convolved probability (Evans et al. 2016). Within T0 +/- 100 s, no significant detections (signal-to-noise ratio >~ 5 sigma) are found in the BAT raw light curves with time bins of 64 ms, 1 s, and 1.6 s. Assuming an on-axis (100% coded) short GRB with a typical spectrum in the BAT energy range (i.e., a simple power-law model with a power-law index of -1.32, Lien & Sakamoto et al. 2016), the 5-sigma upper limit in the 1-s binned light curve corresponds to a flux upper limit (15-350 keV) of ~ 7.12 x 10^-8 erg/s/cm^2. No event data are available at this point. BAT retains decreased, but significant, sensitivity to rate increases for gamma-ray events outside of its FOV. About 94.73% of the integrated LVC localization probability was outside of the BAT FOV but above the Earth's limb from Swift's location, and the corresponding flux upper limits for this region are within roughly an order of magnitude higher than those within the FOV. The results of the BAT analysis are available at https://swift.gsfc.nasa.gov/results/BATbursts/team_web/S190512at/web/source.html //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 24519 SUBJECT: LIGO-Virgo S190512at: AGILE GRID observations DATE: 19/05/13 15:40:22 GMT FROM: Carlotta Pittori at ASI SSDC, INAF-OAR C. Pittori(SSDC, and INAF/OAR), A. Ursi(INAF/IAPS), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), C. Casentini, G. Piano, M. Cardillo (INAF/IAPS), F. Lucarelli, F. Verrecchia(SSDC, and INAF/OAR), A. Bulgarelli, N. Parmiggiani (INAF/OAS-Bologna), M. Pilia(INAF/OA-Cagliari), F. Longo (Univ. Trieste, and INFN Trieste), report on behalf of the AGILE Team: In response to the LIGO-Virgo GW event S190512at T0 = 2019-05-12 18:07:14.422 UTC (GCN #24503), analysis of AGILE data shows that the satellite at T0 was in the South Atlantic Anomaly (SAA). Scientific telemetry was inhibited during the time interval (T0 -13 s; T0 + 834 s). We performed a preliminary analysis of the AGILE Gamma-Ray Imaging Detector (GRID) in the first interval available after the SAA, between T0 +840s and T0+940s. In this time interval, due to Earth occultation and Solar Panel constraints, the GRID exposure covered only about 1% of the LIGO/Virgo 90% c.l. localization region (LR), observed at off-axis angles of about 60 deg. An analysis of the data in the energy range 50 MeV - 10 GeV in this integration time was performed, and preliminary 3-sigma upper limits (UL) values within the small accessible LIGO/Virgo localization region are: from 8.9e-7 erg cm^-2 s^-1 to 1.0e-6 erg cm^-2 s^-1 for an integration time of 100s. We also performed a search for a transient counterpart in the time window from T0 + 1 ks to T0 + 10 ks. In this time interval due to Solar Panel constraints, the GRID exposure covered about 40% of the LR, observed at off-axis angles from about 55 to 100 deg. Preliminary 3-sigma upper limits values are: from 2.8e-9 erg cm^-2 s^-1 to 1.0e-8 erg cm^-2 s^-1 for an integration time of 9 ks. An image of the AGILE-GRID exposure of S190512at in the time window from T0 + 1 ks to T0 + 10 ks is available at the site: https://tools.ssdc.asi.it/ImgView/Agile/AGILE_exp_T0p1k-T0p10k_S190512at9 These measurements were obtained with AGILE observing a large portion of the sky in spinning mode. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 24521 SUBJECT: LIGO/Virgo S190512at: Insight-HXMT/HE observation DATE: 19/05/13 16:44:01 GMT FROM: Qi Luo at IHEP Q. Luo, C. Cai, Q. B. Yi, S. Xiao, C. K. Li, X. B. Li, G. Li, J. Y. Liao, S. L. Xiong, C. Z. Liu, X. F. Li, Z. W. Li, Z. Chang, A. M. Zhang, Y. F. Zhang, X. F. Lu, C. L. Zou (IHEP), Y. J. Jin, Z. Zhang (THU), T. P. Li (IHEP/THU), F. J. Lu, L. M. Song, M. Wu, Y. P. Xu, S. N. Zhang (IHEP), report on behalf of the Insight-HXMT team: Insight-HXMT was taking data normally around the reported LIGO/Virgo S190512at event (GCN #24503), trigger time T0=2019-05-12 18:07:14 UTC. At T0, more than 95% of the LIGO localization region was covered by the Insight-HXMT without occultation by the Earth. Within T0 +/- 100 s, no significant excess events (SNR > 3 sigma) are found in a search of the Insight-HXMT/HE raw light curves. Assuming the GW counterpart GRB with three typical GRB Band spectral models, two typical duration timescales(1 s, 10 s) from the peak position of the LIGO-Virgo location probability map, the 5-sigma upper-limits fluence (0.2 - 5 MeV, incident energy) are reported below: Band model 1 (alpha=-1.9, beta=-3.7, Ep=70 keV): 1s: 2.6e-07 erg cm^-2 10s: 7.4e-07 erg cm^-2 Band model 2 (alpha=-1.0, beta=-2.3, Ep=230 keV): 1s: 3.6e-07 erg cm^-2 10s: 1.1e-06 erg cm^-2 Band model 3 (alpha=-0.0, beta=-1.5, Ep=1000 keV): 1s: 4.5e-07 erg cm^-2 10s: 1.9e-06 erg cm^-2 All measurements above are made with the CsI detectors operating in the regular mode with the energy range of about 80-800 keV (record energy). Only gamma-rays with energy greater than about 200 keV can penetrate the spacecraft and leave signals in the CsI detectors installed inside of the telescope. Insight-HXMT is the first Chinese space X-ray telescope, which was fundedjointly by the China National Space Administration (CNSA) and the Chinese Academy of Sciences (CAS). More information could be found at: http://www.hxmt.org. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 24531 SUBJECT: LIGO/Virgo S190512at: CALET Observations DATE: 19/05/14 03:46:33 GMT FROM: Yuta Kawakubo at Louisiana State U./CALET A. Yoshida, T. Sakamoto, V. Pal'shin, S. Sugita (AGU), Y. Kawakubo (LSU), K. Yamaoka (Nagoya U), S. Nakahira (RIKEN), Y. Asaoka, S. Ozawa, S. Torii (Waseda U), Y. Shimizu, T. Tamura (Kanagawa U), N. Cannady (GSFC/UMBC), M. L. Cherry (LSU), S. Ricciarini (U of Florence), P. S. Marrocchesi (U of Siena), and the CALET collaboration: The CALET Gamma-ray Burst Monitor (CGBM) was operating at the trigger time of S190512at T0=2019-05-12 18:07:14.422UT (The LIGO Scientific Collaboration and Virgo Collaboration, GCN Circ. 24503). No CGBM on-board trigger occurred around the event time. Based on the LIGO-Virgo localization sky map, most of the part of the high probability area was inside of the field-of-view of SGM. The summed LIGO probabilities inside the HXM and the SGM field of view are 19% and 95% (and 0% credible region of the initial localization map were Earth-occulted). The HXM and SGM field of views were centered at RA=205.5 deg, Dec = 44.8 deg and RA=214.9 deg, Dec=37.7 deg at T0. Based on the analysis of the light curve data with 0.125 sec time resolution from T0-60 sec to T0+60 sec, we found no significant excess around the trigger time in either the HXM (7-3000 keV) or the SGM (40 keV - 28 MeV) data. The CALET Calorimeter (CAL) was operating in high energy trigger mode at the trigger time of S190512at. Using CAL data, we have searched for gamma-ray events in the 10-100 GeV band from -60 sec to +60 sec from the GW trigger time and found no candidates. The 90% upper limit of CAL is 1.9x10^-5 erg/cm2/s (10-100 GeV) when the summed LIGO-Virgo probability reaches 10%. The CAL FOV was centered at RA=214.9 deg, Dec=37.7 deg at T0.