GRB 200224C
GCN Circular 27183
Subject
IPN triangulation of GRB 200224C
Date
2020-02-24T21:54:15Z (7 years ago)
From
Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru>
D. Svinkin and K. Hurley, on behalf of the IPN,
A. Goldstein, M. S. Briggs, and C. Wilson-Hodge
on behalf of the Fermi GBM team, and
A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo,
and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,
report:
The short-duration GRB 200224C (The Fermi GBM team, GCN Circ. 27178)
has been detected by Fermi (GBM trigger 604231129) and
INTEGRAL (SPI-ACS), so far, at about 35925 s UT (09:58:45).
We have triangulated this GRB to a GBM-INTEGRAL annulus centered at
RA(2000)=205.247 deg (13h 40m 59s) Dec(2000)=+54.669 deg (+54d 40' 10"),
whose radius is 82.665 +/- 2.948 deg (3 sigma).
The IPN localization is consistent with, but reduces the area of, the
Fermi GBM one.
This localization may be improved.
A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB200224_T35924/IPN/
GCN Circular 27178
Subject
GRB 200224C: Fermi GBM Final Real-time Localization
Date
2020-02-24T10:09:03Z (7 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 09:58:44 UT on 24 Feb 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 200224A (trigger 604231129.56693 / 200224416).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 270.5, Dec = -56.8 (J2000 degrees, equivalent to J2000 18h 02m, -56d 47'), with a statistical uncertainty of 6.0 degrees.
The angle from the Fermi LAT boresight is 151.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200224416/quicklook/glg_skymap_all_bn200224416.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200224416/quicklook/glg_healpix_all_bn200224416.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200224416/quicklook/glg_lc_medres34_bn200224416.gif
[GCN OPS NOTE(24feb20): This is the seventh Circular in the sequence of 8 circulars
which were all labeled A because of the sequence assigner being offline.
This circular was orginally, incorrectly labelled A, but the true letter identity is C.]