//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27902 SUBJECT: GRB 200607B: Fermi GBM Final Real-time Localization DATE: 20/06/07 22:16:55 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 22:06:31 UT on 7 Jun 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 200607B (trigger 613260396.424964 / 200607921). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 41.3, Dec = -83.3 (J2000 degrees, equivalent to J2000 02h 45m, -83d 17'), with a statistical uncertainty of 1.0 degrees. The angle from the Fermi LAT boresight is 20.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200607921/quicklook/glg_skymap_all_bn200607921.png The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200607921/quicklook/glg_healpix_all_bn200607921.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200607921/quicklook/glg_lc_medres34_bn200607921.gif //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27903 SUBJECT: Fermi GRB 200607B: Global MASTER-Net observations report DATE: 20/06/07 22:30:28 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva, D.Kuvshinov, D. Cheryasov (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA), H.Levato (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), O.A. Gres, N.M. Budnev, O.Ershova (Irkutsk State University, API), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich, Yu. Sergienko (Blagoveschensk Educational State University) 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 Fermi GRB 200607B ( Fermi GBM team, GCN 27902) errorbox 24 sec after notice time and 53 sec after trigger time at 2020-06-07 22:07:24 UT, with upper limit up to 17.8 mag. The observations began at zenith distance = 62 deg. The sun altitude is -78.6 deg. The galactic latitude b = -33 deg., longitude l = 301 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1376307 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 59 | 2020-06-07 22:07:24 | MASTER-SAAO | (01h 30m 36.49s , -84d 13m 24.3s) | C | 10 | 17.3 | 59 | 2020-06-07 22:07:24 | MASTER-SAAO | (02h 39m 16.16s , -84d 11m 05.2s) | C | 10 | 17.4 | 88 | 2020-06-07 22:07:54 | MASTER-SAAO | (01h 30m 26.70s , -84d 14m 22.9s) | C | 10 | 17.3 | 88 | 2020-06-07 22:07:54 | MASTER-SAAO | (02h 39m 18.22s , -84d 12m 04.0s) | C | 10 | 17.5 | 123 | 2020-06-07 22:08:23 | MASTER-SAAO | (02h 18m 05.68s , -83d 19m 14.7s) | P/ | 20 | 16.5 | 123 | 2020-06-07 22:08:23 | MASTER-SAAO | (03h 17m 34.57s , -83d 16m 55.7s) | P\ | 20 | 17.0 | 167 | 2020-06-07 22:09:03 | MASTER-SAAO | (02h 18m 00.26s , -83d 20m 43.7s) | P/ | 30 | 16.9 | 167 | 2020-06-07 22:09:03 | MASTER-SAAO | (03h 17m 41.87s , -83d 18m 24.8s) | P\ | 30 | 17.0 | 221 | 2020-06-07 22:09:52 | MASTER-SAAO | (02h 18m 08.05s , -83d 19m 17.0s) | P/ | 40 | 17.0 | 221 | 2020-06-07 22:09:52 | MASTER-SAAO | (03h 17m 36.50s , -83d 16m 57.9s) | P\ | 40 | 17.3 | 286 | 2020-06-07 22:10:52 | MASTER-SAAO | (02h 26m 51.67s , -83d 13m 46.1s) | P/ | 50 | 16.9 | 286 | 2020-06-07 22:10:52 | MASTER-SAAO | (03h 18m 17.49s , -83d 25m 38.3s) | P\ | 50 | 17.3 | 382 | 2020-06-07 22:12:23 | MASTER-SAAO | (03h 17m 30.22s , -83d 16m 50.8s) | P\ | 60 | 17.5 | 605 | 2020-06-07 22:15:41 | MASTER-SAAO | (02h 18m 06.68s , -83d 19m 24.4s) | P/ | 110 | 17.5 | 605 | 2020-06-07 22:15:41 | MASTER-SAAO | (03h 17m 35.17s , -83d 17m 05.0s) | P\ | 110 | 17.8 | 745 | 2020-06-07 22:17:51 | MASTER-SAAO | (02h 18m 02.11s , -83d 20m 47.6s) | P/ | 130 | 17.5 | 745 | 2020-06-07 22:17:51 | MASTER-SAAO | (03h 17m 42.85s , -83d 18m 28.6s) | P\ | 130 | 17.8 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27905 SUBJECT: GRB 200607B: AstroSat CZTI detection DATE: 20/06/08 17:14:04 GMT FROM: Soumya Gupta at IUCAA/ASTROSAT S. Gupta, V. Sharma and D. Bhattacharya (IUCAA), V. Bhalerao (IIT-B), A. R. Rao (IUCAA/TIFR) and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration: Analysis of AstroSat CZTI data showed the detection of a long GRB 200607B, which was also detected by Fermi GBM (GCN #27902) and Global MASTER-Net (Lipunov V. et al., GCN # 27903). The source was clearly detected in the 40-200 keV energy range. The light curve showed multiple peaks of emission with the strongest peak at 2020-06-07 22:06:31.515 UT. The measured peak count rate associated with the burst is 688 +/- 35 cts/s above the background in the combined data of four quadrants, with a total of 5015 +/- 38 cts. The local mean background count rate was 549 +/- 1 cts/s. Using cumulative rates, we measure a T90 of 26.69 +/- 0.32 s. It was also clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range. The light curve showed multiple peaks of emission with the strongest peak at 2020-06-07 22:06:30.42 UT. The measured peak count rate is 743 +/- 41 cts/s above the background in the combined Veto data of four quadrants, with a total of 3041 +/- 120 cts. The local mean background count rate was 1662 +/- 7 cts/s. We measure a T90 of 9.71 +/- 2.25 s from the cumulative Veto light curve. CZTI GRB detections are reported regularly on the payload site at http://astrosat.iucaa.in/czti/?q=grb. CZTI is built by a TIFR-led consortium of institutes across India, including VSSC, ISAC, IUCAA, SAC and PRL. The Indian Space Research Organisation funded, managed and facilitated the project.