GRB 220315A
GCN Circular 31758
Subject
GRB 220315A: Fermi GBM Final Real-time Localization
Date
2022-03-15T02:37:20Z (3 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 SHORT GRB
At 02:25:56 UT on 15 Mar 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220315A (trigger 669003961.874798 / 220315101).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 236.1, Dec = -76.8 (J2000 degrees, equivalent to J2000 15h 44m, -76d 47'), with a statistical uncertainty of 3.5 degrees.
The angle from the Fermi LAT boresight is 21.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220315101/quicklook/glg_skymap_all_bn220315101.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220315101/quicklook/glg_healpix_all_bn220315101.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220315101/quicklook/glg_lc_medres34_bn220315101.gif
GCN Circular 31761
Subject
GRB 220315A: MASTER Global Robotic Net optical observations
Date
2022-03-15T23:08:26Z (3 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V.Lipunov,V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D.Vlasenko, G.Antipov,
V.Senik, D.Kuvshinov, Ya.Kechin, Yu.Tselik (Lomonosov Moscow State University, SAI, Physics Department),
C.Francile, R. Podesta, C.Lopez, F. Podesta (Observatorio Astronomico Felix Aguilar OAFA),
D.A.H.Buckley (SAAO),
R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias),
L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez,
A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory),
N.M.Budnev, O.A.Gress (ISU,API),
A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),
A. Gabovich, V.Yurkov (Blagoveschensk Educational State University)
MASTER Global Robotic Net (http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)
started Fermi GRB 220315A (Fermi GBM team GCN 31758, Ttrigger= 2022-03-15 02:25:56 UT) alert observations at
MASTER-OAFA robotic telescope, located in Argentina (OAFA observatory of San Juan National University)
518 sec after notice time (549 sec after trigger time) at 2022-03-15 02:35:05 UT, with upper limit up to 17.8 mag.
The observations began at zenith distance = 61 deg. The sun altitude was -44.7 deg.
The galactic latitude b = -18 deg.,longitude l = 313 deg.
MASTER-SAAO started observations just after sunset at 2022-03-15 17:39:36UT with upper limits 17.0 mag at first image.
The observations began at 23deg altitude, the sun altitude was -10deg.
Real time updated cover map and OT, that can be discovered, will be available here:
https://master.sai.msu.ru/site/master2/observ.php?id=1911047
We obtained the following upper limits at first images
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
619 | 2022-03-15 02:35:05 | MASTER-OAFA | (15h 42m 55.34s , -77d 27m 34.1s) | C | 140 | 17.7 |
814 | 2022-03-15 02:38:05 | MASTER-OAFA | (15h 43m 03.16s , -77d 27m 05.3s) | C | 170 | 17.8 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.