//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 28965 SUBJECT: GRB 201130A: Fermi GBM Final Real-time Localization DATE: 20/11/30 05:41:09 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely SHORT GRB At 05:30:49 UT on 30 Nov 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 201130A (trigger 628407054.55185 / 201130230). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 165.9, Dec = 29.6 (J2000 degrees, equivalent to J2000 11h 03m, 29d 36'), with a statistical uncertainty of 21.2 degrees. The angle from the Fermi LAT boresight is 108.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201130230/quicklook/glg_skymap_all_bn201130230.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/bn201130230/quicklook/glg_healpix_all_bn201130230.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201130230/quicklook/glg_lc_medres34_bn201130230.gif //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 28966 SUBJECT: Fermi GRB 201130A: Global MASTER-Net observations report DATE: 20/11/30 05:45:16 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), 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-IAC robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Spain (IAC Teide Observatory) started inspect of the Fermi GRB 201130A ( Fermi GBM team, GCN 28965) errorbox 197 sec after notice time and 205 sec after trigger time at 2020-11-30 05:34:15 UT, with upper limit up to 17.5 mag. The observations began at zenith distance = 15 deg. The sun altitude is -26.4 deg. The galactic latitude b = 67 deg., longitude l = 201 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1492996 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 236 | 2020-11-30 05:34:15 | MASTER-IAC | (10h 16m 57.83s , +32d 07m 21.5s) | C | 60 | 17.4 | 315 | 2020-11-30 05:35:34 | MASTER-IAC | (10h 31m 08.69s , +34d 06m 38.7s) | C | 60 | 17.5 | 395 | 2020-11-30 05:36:54 | MASTER-IAC | (10h 35m 48.60s , +32d 06m 44.9s) | C | 60 | 17.4 | 475 | 2020-11-30 05:38:14 | MASTER-IAC | (10h 26m 55.79s , +36d 07m 37.0s) | C | 60 | 17.5 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 28967 SUBJECT: GRB 201130A: DDOTI Observations DATE: 20/11/30 16:25:05 GMT FROM: Alan M Watson at UNAM Alan M. Watson (UNAM), Margarita Pereyra (UNAM), Nat Butler (ASU), Rosa L. Becerra (UNAM), Simone Dichiara (GSFC/UMD), Alexander Kutyrev (GSFC/UMD), William H. Lee (UNAM), Océlotl Lopez (UNAM), Diego Gonzalez (UNAM), Srihari Ravi (ASU), and Eleonora Troja (GSFC/UMD) report: We observed the field of the Fermi/GBM likely short GRB 201130A (Fermi GBM Team, GCN Circ. 28965) with the DDOTI/OAN wide-field imager at the Observatorio Astronómico Nacional on Sierra San Pedro Martir (http://ddoti.astroscu.unam.mx) from 2020-11-30 07:56 UTC to 13:09 UTC (from 2.4 to 7.7 hours after the trigger) We observed a region covering 20.4 degrees in RA and 20.4 degrees in declination (about 416 square degrees) centered on 10:28:57.60 +31:59:24.0 (J2000). We obtained between 1020 and 1620 seconds exposure in the w filter. We calibrated our images against the APASS catalog. Our 10-sigma limiting magnitudes vary from w = 17.8 to 19.3. Compared to the USNO-B1, DSS DR2 and Pan-STARRS DR1 catalogs, we detect no uncataloged sources to our 10-sigma limit. We thank the staff of the Observatorio Astronomico Nacional in San Pedro Martir. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 28981 SUBJECT: GRB201130A: Zwicky Transient Facility Follow-Up of a Fermi Short GRB (Trigger 628407054) DATE: 20/12/02 15:41:48 GMT FROM: Shreya Anand at GROWTH Caltech Simeon Reusch (DESY), Igor Andreoni (Caltech), Harsh Kumar (IITB), Tomas Ahumada (UMD), Varun Bhalerao (IITB), Shreya Anand (Caltech), Eric Bellm (UW), Michael Coughlin (UMN), Mansi Kasliwal (Caltech), Erik Kool (OKC), Ana Sagues Carracedo (OKC), Leo Singer (NASA/GSFC), and Robert Stein (DESY) on behalf of the Zwicky Transient Facility (ZTF) and Global Relay of Observatories Watching Transients Happen (GROWTH) collaborations: We observed the localization region of the short GRB201130A (trigger 628407054) detected by the Gamma-Ray Burst Monitor (GBM) on the Fermi satellite with the Palomar 48 inch telescope equipped with the 47 square degree Zwicky Transient Facility (ZTF) camera. We obtained a series of g-band images covering about 400 square degrees beginning at 12:28 UT on 2020 Nov 30 (about 7 hours after the burst trigger time) for two consecutive nights. This corresponds to ~75% of the probability enclosed in the region of the GRB localization map that was unocculted by the Earth for the Fermi GBM (GCN 28965). Exposures reached a g-band median depth of 20.5 mag and 20.3 mag in the first and second night. The images were processed in real-time through the ZTF reduction and image subtraction pipelines at IPAC (Masci et al. 2019). We queried the ZTF alert stream using Kowalski (Duev et al. 2019) and AMPEL (Nordin et al. 2019). We required at least 2 detections separated by at least 15 minutes to select against moving objects. Furthermore, we cross-matched our candidates with the Minor Planet Center to flag known asteroids, reject stellar sources (Tachibana and Miller 2018), and apply machine learning algorithms (Duev et al. 2019, Mahabal et al. 2019). We require no spatially coincident ZTF alert to be issued before the detection time of the GBM trigger. We found no candidates consistent with a potential GRB counterpart within the localization region. ZTF and GROWTH are worldwide collaborations comprising Caltech, USA; IPAC, USA, WIS, Israel; OKC, Sweden; JSI/UMd, USA; U Washington, USA; DESY, Germany; MOST, Taiwan; UW Milwaukee, USA; LANL USA; Tokyo Tech, Japan; IITB, India; IIA, India; LJMU, UK; TTU, USA; SDSU, USA and USyd, Australia. ZTF acknowledges the generous support of the NSF under AST MSIP Grant No 1440341. GROWTH acknowledges generous support of the NSF under PIRE Grant No 1545949. Alert distribution service provided by DIRAC@UW (Patterson et al. 2019). Alert database searches are done by AMPEL (Nordin et al. 2019) and Kowalski (Duev et al. 2019).