GRB 210503A
GCN Circular 29927
Subject
GRB 210503A: Fermi GBM Final Real-time Localization
Date
2021-05-03T19:44:33Z (4 years ago)
From
Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>
The Fermi GBM team reports the detection of a likely LONG GRB
At 19:34:09 UT on 3 May 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210503A (trigger 641763254.461374 / 210503815).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 328.9, Dec = 66.0 (J2000 degrees, equivalent to J2000 21h 55m, 66d 00'), with a statistical uncertainty of 5.1 degrees.
The angle from the Fermi LAT boresight is 32.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210503815/quicklook/glg_skymap_all_bn210503815.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210503815/quicklook/glg_healpix_all_bn210503815.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210503815/quicklook/glg_lc_medres34_bn210503815.gif
GCN Circular 29928
Subject
Fermi GRB 210503A: Global MASTER-Net observations report
Date
2021-05-03T20:30:21Z (4 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
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-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB 210503A ( Fermi GBM team, GCN 29927) errorbox 553 sec after notice time and 580 sec after trigger time at 2021-05-03 19:43:49 UT, with upper limit up to 18.6 mag. The observations began at zenith distance = 65 deg. The sun altitude is -28.1 deg.
The galactic latitude b = 9 deg., longitude l = 107 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=1606239
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
640 | 2021-05-03 19:43:49 | MASTER-Kislovodsk | (22h 04m 41.61s , +65d 36m 00.0s) | C | 120 | 17.8 |
795 | 2021-05-03 19:43:49 | MASTER-Kislovodsk | (22h 04m 41.62s , +65d 36m 00.1s) | C | 430 | 18.2 | Coadd
641 | 2021-05-03 19:43:50 | MASTER-Kislovodsk | (21h 55m 16.11s , +66d 01m 20.5s) | C | 120 | 17.4 |
796 | 2021-05-03 19:43:50 | MASTER-Kislovodsk | (21h 55m 16.11s , +66d 01m 20.6s) | C | 430 | 17.9 | Coadd
791 | 2021-05-03 19:46:10 | MASTER-Kislovodsk | (21h 55m 13.86s , +66d 02m 59.4s) | C | 140 | 17.4 |
791 | 2021-05-03 19:46:10 | MASTER-Kislovodsk | (22h 04m 39.81s , +65d 37m 37.1s) | C | 140 | 17.6 |
966 | 2021-05-03 19:48:50 | MASTER-Kislovodsk | (21h 55m 14.30s , +66d 01m 26.2s) | C | 170 | 17.5 |
966 | 2021-05-03 19:48:50 | MASTER-Kislovodsk | (22h 04m 39.77s , +65d 36m 02.5s) | C | 170 | 17.6 |
1161 | 2021-05-03 19:52:00 | MASTER-Kislovodsk | (21h 55m 17.75s , +66d 02m 50.4s) | C | 180 | 16.9 |
1162 | 2021-05-03 19:52:00 | MASTER-Kislovodsk | (22h 04m 43.87s , +65d 37m 25.6s) | C | 180 | 17.0 |
2005 | 2021-05-03 20:07:04 | MASTER-Kislovodsk | (21h 37m 10.39s , +66d 01m 47.0s) | C | 60 | 17.8 |
2005 | 2021-05-03 20:07:04 | MASTER-Kislovodsk | (21h 47m 15.11s , +65d 35m 53.1s) | C | 60 | 18.1 |
2085 | 2021-05-03 20:08:24 | MASTER-Kislovodsk | (22h 02m 55.09s , +68d 00m 35.5s) | C | 60 | 17.3 |
2085 | 2021-05-03 20:08:24 | MASTER-Kislovodsk | (22h 13m 49.89s , +67d 34m 30.0s) | C | 60 | 17.6 |
2165 | 2021-05-03 20:09:44 | MASTER-Kislovodsk | (21h 52m 55.00s , +64d 01m 52.3s) | C | 60 | 17.6 |
2165 | 2021-05-03 20:09:44 | MASTER-Kislovodsk | (22h 02m 14.69s , +63d 36m 02.4s) | C | 60 | 17.9 |
2245 | 2021-05-03 20:11:04 | MASTER-Kislovodsk | (22h 16m 27.15s , +66d 00m 24.9s) | C | 60 | 17.5 |
2245 | 2021-05-03 20:11:04 | MASTER-Kislovodsk | (22h 26m 29.07s , +65d 34m 25.8s) | C | 60 | 17.7 |
2326 | 2021-05-03 20:12:25 | MASTER-Kislovodsk | (21h 20m 16.68s , +68d 00m 22.7s) | C | 60 | 17.7 |
2326 | 2021-05-03 20:12:25 | MASTER-Kislovodsk | (21h 31m 11.18s , +67d 34m 26.7s) | C | 60 | 18.2 |
2406 | 2021-05-03 20:13:45 | MASTER-Kislovodsk | (21h 48m 48.66s , +70d 00m 16.6s) | C | 60 | 17.9 |
2406 | 2021-05-03 20:13:45 | MASTER-Kislovodsk | (22h 00m 44.35s , +69d 34m 04.3s) | C | 60 | 18.4 |
2686 | 2021-05-03 20:18:25 | MASTER-Kislovodsk | (22h 38m 42.00s , +63d 34m 18.9s) | C | 60 | 18.0 |
2686 | 2021-05-03 20:18:25 | MASTER-Kislovodsk | (22h 29m 29.94s , +63d 59m 46.5s) | C | 60 | 17.6 |
2767 | 2021-05-03 20:19:46 | MASTER-Kislovodsk | (22h 08m 18.67s , +62d 01m 27.6s) | C | 60 | 17.7 |
2767 | 2021-05-03 20:19:46 | MASTER-Kislovodsk | (22h 16m 54.68s , +61d 36m 05.7s) | C | 60 | 18.2 |
2847 | 2021-05-03 20:21:06 | MASTER-Kislovodsk | (21h 16m 33.92s , +64d 01m 43.6s) | C | 60 | 18.1 |
2847 | 2021-05-03 20:21:06 | MASTER-Kislovodsk | (21h 25m 48.93s , +63d 36m 22.4s) | C | 60 | 18.6 |
2927 | 2021-05-03 20:22:26 | MASTER-Kislovodsk | (21h 47m 08.96s , +65d 36m 48.0s) | C | 60 | 18.5 |
2927 | 2021-05-03 20:22:26 | MASTER-Kislovodsk | (21h 37m 11.26s , +66d 02m 19.3s) | C | 60 | 18.0 |
3007 | 2021-05-03 20:23:46 | MASTER-Kislovodsk | (22h 03m 09.27s , +68d 00m 46.9s) | C | 60 | 17.7 |
3007 | 2021-05-03 20:23:46 | MASTER-Kislovodsk | (22h 13m 56.78s , +67d 35m 04.6s) | C | 60 | 18.2 |
3087 | 2021-05-03 20:25:06 | MASTER-Kislovodsk | (21h 53m 02.84s , +64d 00m 05.4s) | C | 60 | 17.9 |
3087 | 2021-05-03 20:25:06 | MASTER-Kislovodsk | (22h 02m 15.96s , +63d 34m 40.4s) | C | 60 | 18.3 |
3167 | 2021-05-03 20:26:26 | MASTER-Kislovodsk | (22h 26m 30.72s , +65d 34m 32.3s) | C | 60 | 18.2 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.
GCN Circular 29935
Subject
Fermi GRB 210503A: DDOTI Upper Limits on the Afterglow
Date
2021-05-04T22:48:23Z (4 years ago)
From
Emma Margarita Pereyra Talamantes at IA-UNAM Ensenada <mpereyra@astro.unam.mx>
Margarita Pereyra (UNAM), Nat Butler (ASU), Alan M. Watson (UNAM),
Eleonora Troja (GSFC/UMD), Simone Dichiara (GSFC/UMD), Rosa L. Becerra
(UNAM), William H. Lee (UNAM), Oc��lotl L��pez, Diego Gonzalez (UNAM),
Alexander Kutyrev (GSFC/UMD), and Srihari Ravi (ASU), report:
We observed the field of the likely long Fermi GRB 210503A (trigger
641763254, GCN #29927, Fermi GBM Team) with the DDOTI/OAN wide-field imager
at the Observatorio Astron��mico Nacional on Sierra San Pedro M��rtir (
http://ddoti.astroscu.unam.mx) on 2021-05-04 from 07:02 to 11:38 UTC (11.5
to 16 hours after the event).
We observed a region of 20.4 degrees in RA by 20.4 degrees in declination,
with a 3 x 2 grid, centered on the Fermi GBM Final Position 328.93d
+66.03d (J2000). This region contains 6 instrumental fields or about 400
square degrees. We obtained 1560 seconds of exposure per instrumental field
in the w filter. We obtained AB photometry by calibration against the APASS
catalog.
We detect no likely candidate for the afterglow to our 10-sigma upper
limits of
w = 19.32 to 19.93 (interquartile range).
We thank the staff of the Observatorio Astron��mico Nacional in San Pedro
M��rtir.
--