GRB 200907A
GCN Circular 28378
Subject
GRB 200907A: AGILE/MCAL detection of a burst
Date
2020-09-07T16:09:14Z (5 years ago)
From
Alessandro Ursi at INAF/IAPS <alessandro.ursi@gmail.com>
A. Ursi (INAF/IAPS), F. Verrecchia (SSDC, and INAF/OAR), M. Tavani
(INAF/IAPS, and Univ. Roma Tor Vergata), A. Argan, M. Cardillo, C.
Casentini, Y. Evangelista, G. Piano (INAF/IAPS), F. Lucarelli, C. Pittori
(SSDC, and INAF/OAR), A. Bulgarelli, V. Fioretti, F. Fuschino, N.
Parmiggiani (INAF/OAS-Bologna), M. Marisaldi (INAF/OAS-Bologna, and Bergen
University), M. Pilia, A. Trois (INAF/OA-Cagliari), I. Donnarumma (ASI), F.
Longo (Univ. Trieste and INFN Trieste), A. Giuliani (INAF/IASF-Mi), report
on behalf of the AGILE Team:
The AGILE Mini-CALorimeter (MCAL) detected a short burst at T0 = 2020-09-07
14:24:24.73 +/- 0.01 s (UTC).
The event lasted about 1.6 s and released a total number of ~350 counts in
the detector (in the 0.4-100 MeV energy range), above an average background
rate of 680 Hz.
The light curve shows a single sharp peak and it can be found at
http://www.agilescienceapp.it/notices/GRB_069464_526573464.733762.png .
The event is also clearly visible in the AGILE Scientific Ratemeters of the
SuperAGILE [SA; 18-60 keV], MiniCALorimeter [MCAL; 0.4-100 MeV], and
AntiCoincidence [AC; 50-200 keV] detectors.
The AGILE-MCAL detector is a CsI detector with a 4 pi FoV, sensitive in the
energy range 0.4-100 MeV. Additional analysis of AGILE data is in progress.
Automatic MCAL GRB alert Notices can be found at:
https://gcn.gsfc.nasa.gov/agile_mcal.html.
GCN Circular 28387
Subject
GRB200907A: GROWTH-India optical upper limit
Date
2020-09-07T22:25:42Z (5 years ago)
From
Harsh Kumar at Indian Inst of Tech,Bombay <harshkosli13@gmail.com>
H. Kumar (IITB), P. Dorje (IIA), V. Bhalerao(IITB), G. C. Anupama(IIA), S.
Barway(IIA), report on behalf of the GROWTH-India collaboration:
We observed GRB200907A reported by Swift-BAT (A.P. Beardmore et al., GCN
#28384, P.A. Evans et al., GCN #28385) with 0.7m GROWTH-India telescope.
The field was observed in the SDSS r filter starting at
2020-09-07T20:59:05.36 UT i.e. ~2.1 hrs after the event detection by
Swift-BAT. We didn���t find any new source in stacked image of 7*500 sec
exposure, within an uncertainty region of 2.2 arcsec around RA(J2000) =
05:56:06.93, Dec(J2000)= +06:54:22.8 (GCN 28385) up to r > 20.83 mag
(5-sigma)(Calibrated against PanSTARRs PS1 data release, Flewelling et al.,
2018)
The GROWTH India Telescope (GIT) is a 70-cm telescope with a 0.7-degree
field of view, set up by the Indian Institute of Astrophysics and the
Indian Institute of Technology Bombay with support from the Indo-US Science
and Technology Forum (IUSSTF) and the Science and Engineering Research
Board (SERB) of the Department of Science and Technology (DST), Government
of India (https://sites.google.com/view/growthindia/). It is located at the
Indian Astronomical Observatory (Hanle), operated by the Indian Institute
of Astrophysics (IIA).
GCN Circular 28409
Subject
IPN triangulation of GRB 200907A (short)
Date
2020-09-11T14:22:19Z (5 years ago)
From
Anna Ridnaia at Ioffe Institute <ridnaia@mail.ioffe.ru>
K. Hurley, on behalf of the IPN,
I. G. Mitrofanov, D. V. Golovin, A. S. Kozyrev, M. L. Litvak,
and A. B. Sanin, on behalf of the HEND-Odyssey GRB team,
A. Ridnaia, S. Golenetskii, R. Aptekar, D. Frederiks, D. Svinkin,
and T. Cline on behalf of the Konus-Wind team,
A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo,
and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,
S. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu
on behalf of the Swift-BAT team,
A. Ursi, F. Verrecchia, M. Tavani, N. Parmiggiani, C. Pittori,
A. Bulgarelli, on behalf of the AGILE Team, and
W. Boynton, C. Fellows, K. Harshman, H. Enos, and R. Starr,
on behalf of the GRS-Odyssey GRB team, report:
The short-duration GRB 200907A
(AGILE/MCAL detection: Ursi et al., GCN 28378)
was detected by AGILE (MCAL), Konus-Wind, INTEGRAL (SPI-ACS),
Mars-Odyssey (HEND), and Swift (BAT) at about 51860 s UT (14:24:20).
The burst was outside the coded field of view of the BAT.
We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
---------------------------------------------
RA(2000), deg Dec(2000), deg
---------------------------------------------
Center:
141.475 (09h 25m 54s) -1.433 ( -1d 26' 00")
Corners:
141.200 (09h 24m 48s) -1.061 ( -1d 03' 41")
141.151 (09h 24m 36s) -1.497 ( -1d 29' 48")
141.752 (09h 27m 01s) -1.796 ( -1d 47' 45")
141.799 (09h 27m 12s) -1.366 ( -1d 21' 58")
---------------------------------------------
The error box area is 986 sq. arcmin, and its maximum
dimension is 55 arcmin (the minimum one is 24.5 arcmin).
The Sun distance was 26 deg.
This box may be improved.
A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB200907_T51859/IPN
The Konus-Wind time history and spectrum will be given in a forthcoming
GCN Circular.