GRB 240220A
GCN Circular 35759
Subject
GRB 240220A: Fermi GBM Final Real-time Localization
Date
2024-02-20T11:25:52Z (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 11:15:23 UT on 20 Feb 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240220A (trigger 730120528.966366 / 240220469).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 55.2, Dec = 26.4 (J2000 degrees, equivalent to J2000 03h 40m, 26d 23'), with a statistical uncertainty of 2.2 degrees.
The angle from the Fermi LAT boresight is 77.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240220469/quicklook/glg_skymap_all_bn240220469.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/bn240220469/quicklook/glg_healpix_all_bn240220469.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240220469/quicklook/glg_lc_medres34_bn240220469.gif
GCN Circular 35760
Subject
Fermi GRB 240220A: Global MASTER-Net observations report
Date
2024-02-20T11:30:34Z (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-Amur robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the Fermi GRB 240220A ( Fermi GBM team, GCN 35759) errorbox 308 sec after notice time and 342 sec after trigger time at 2024-02-20 11:21:06 UT, with upper limit up to 17.5 mag. The observations began at zenith distance = 37 deg. The sun altitude is -24.0 deg.
The galactic latitude b = -22 deg., longitude l = 164 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=2382619
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
372 | 2024-02-20 11:21:06 | MASTER-Amur | (03h 32m 28.27s , +23d 57m 23.1s) | C | 60 | 17.4 |
452 | 2024-02-20 11:22:25 | MASTER-Amur | (03h 41m 17.33s , +23d 56m 30.1s) | C | 60 | 17.5 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.