GCN Circular 32545
Subject
IPN triangulation of GRB 220905A
Event
Date
2022-09-11T20:08:57Z (4 years ago)
From
Anna Ridnaia at Ioffe Institute <ridnaia@mail.ioffe.ru>
A. Ridnaia, D. Frederiks, D. Svinkin, A. Lysenko,
and T. Cline on behalf of the Konus-Wind team,
A. Goldstein, M. S. Briggs, and C. Wilson-Hodge
on behalf of the Fermi GBM team,
E. Bozzo and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,
and
S. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu
on behalf of the Swift-BAT team, report:
The long-duration GRB 220905A
(Fermi-GBM detection: Fermi GBM Team, GCN Circ. 32518,
BALROG localization: Biltzinger et al., GCN Circ. 32519)
was detected by Fermi (GBM trigger 684070128),
INTEGRAL (SPI-ACS), Konus-Wind, and Swift (BAT)
at about 41324 s UT (11:28:44).
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:
338.931 (22h 35m 43s) -37.594 (-37d 35' 38")
Corners:
341.100 (22h 44m 24s) -39.495 (-39d 29' 42")
341.797 (22h 47m 11s) +6.185 ( +6d 11' 06")
336.870 (22h 27m 29s) -35.655 (-35d 39' 18")
289.822 (19h 19m 17s) -23.843 (-23d 50' 36")
---------------------------------------------
The error box area is 349.6 sq. deg, and its maximum
dimension is 87.7 deg (the minimum one is 5 deg).
The Sun distance was 125 deg.
This box may be improved.
The IPN localization is consistent with, but reduces the area of, the
Fermi GBM Final Real-time position (GCN Circ. 31955) and BALROG
(GCN 31950) localizations.
A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB220905_T41330/IPN
The Konus-Wind time history and spectrum will be given in a forthcoming
GCN Circular.