GRB 240527A
GCN Circular 36544
Subject
GRB 240527A: Fermi GBM Final Real-time Localization
Date
2024-05-27T07:18:53Z (a year ago)
From
Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>
Via
email
The Fermi GBM team reports the detection of a likely LONG GRB
At 07:07:25 UT on 27 May 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240527A (trigger 738486450.988348 / 240527297).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 307.6, Dec = -15.4 (J2000 degrees, equivalent to J2000 20h 30m, -15d 24'), with a statistical uncertainty of 10.3 degrees.
The angle from the Fermi LAT boresight is 67.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240527297/quicklook/glg_skymap_all_bn240527297.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240527297/quicklook/glg_healpix_all_bn240527297.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240527297/quicklook/glg_lc_medres34_bn240527297.gif
GCN Circular 36552
Subject
Fermi GRB 240527A: Global MASTER-Net observations report
Date
2024-05-28T00:15:43Z (a year ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
Via
legacy email
V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko,
G.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij
(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. Gress, N.M. Budnev, O.Ershova
(Irkutsk State University, API),
L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez,
A.R.Corella, L.H.Rodriguez
(INAOE, Guillermo Haro Astrophysics Observatory),
A. Tlatov, D. Dormidontov
(Kislovodsk Solar Station of the Pulkovo Observatory),
V. Yurkov, A. Gabovich
(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 240527A ( Fermi GBM team, GCN 36544) errorbox 54107 sec after notice time and 54125 sec after trigger time at 2024-05-27 22:09:31 UT, with upper limit up to 17.4 mag. The observations began at zenith distance = 66 deg. The sun altitude is -77.9 deg.
The galactic latitude b = -29 deg., longitude l = 30 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=2471879
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
54155 | 2024-05-27 22:09:31 | MASTER-SAAO | (20h 39m 12.37s , -16d 25m 18.1s) | C | 60 | 16.8 |
54215 | 2024-05-27 22:09:31 | MASTER-SAAO | (20h 39m 12.37s , -16d 25m 18.0s) | C | 180 | 17.4 | Coadd
54235 | 2024-05-27 22:10:50 | MASTER-SAAO | (20h 39m 12.28s , -16d 25m 13.7s) | C | 60 | 16.9 |
54314 | 2024-05-27 22:12:10 | MASTER-SAAO | (20h 39m 12.20s , -16d 25m 11.2s) | C | 60 | 16.9 |
54394 | 2024-05-27 22:13:29 | MASTER-SAAO | (20h 39m 12.11s , -16d 25m 09.7s) | C | 60 | 16.9 |
54454 | 2024-05-27 22:13:29 | MASTER-SAAO | (20h 39m 12.12s , -16d 25m 09.8s) | C | 180 | 17.3 | Coadd
54579 | 2024-05-27 22:16:35 | MASTER-SAAO | (20h 39m 14.41s , -16d 25m 58.9s) | C | 60 | 16.9 |
54659 | 2024-05-27 22:17:54 | MASTER-SAAO | (20h 39m 14.28s , -16d 25m 59.0s) | C | 60 | 16.9 |
54738 | 2024-05-27 22:19:14 | MASTER-SAAO | (20h 39m 14.20s , -16d 25m 59.2s) | C | 60 | 17.0 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.