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GCN Circular 36814

Subject
IPN triangulation of GRB 240627A
Date
2024-07-03T17:35:46Z (5 months ago)
From
Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru>
Via
legacy email
A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin
on behalf of the HEND/Mars Odyssey team,

D. Svinkin, D. Frederiks, A. Ridnaia, A. Lysenko,
and T. Cline on behalf of the Konus-Wind team,

A. Goldstein, M. S. Briggs, C. Wilson-Hodge,
and E. Burns on behalf of the Fermi GBM team,

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,

G. Waratkar, V. Jethwani, J.Joshi, V. Bhalerao, D. Bhattacharya, and S. Vadawale, on behalf of the Astrosat-CZTI team,

and

W. Boynton, C. Fellows, K. Harshman, H. Enos, R. Starr,
and A.S. Gardner on on behalf of the GRS-Odyssey GRB team,
report:

The bright, long-duration GRB 240627A
(AstroSat-CZTI detection: Joshi et al., GCN 36776Not found
 
 
;
NuSTAR anti-coincidence shields detection: Grefenstette, GCN 36778Not found
 
 
;
CALET-CGBM detection: Kobayashi et al., GCN 36798Not found
 
 
)
was detected by Astrosat (CZTI), Konus-Wind, INTEGRAL (SPI-ACS),
NuSTAR (ACS), CALET (CGBM), and Mars-Odyssey (HEND)
at about 86341 s UT (23:59:01).

We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
 ---------------------------------------------
  RA(2000), deg                 Dec(2000), deg
 ---------------------------------------------
 Center:
  164.155 (10h 56m 37s) +72.806 (+72d 48' 23")
 Corners:
  166.270 (11h 05m 05s) +73.674 (+73d 40' 25")
  166.346 (11h 05m 23s) +73.611 (+73d 36' 38")
  162.228 (10h 48m 55s) +71.917 (+71d 55' 02")
  162.147 (10h 48m 35s) +71.979 (+71d 58' 45")
 ---------------------------------------------
The error box area is 416 sq. arcmin, and its maximum
dimension is 2.1 deg (the minimum one is 3.4 arcmin).
The Sun distance was 60 deg.

This localization may be improved.

A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB240627_T86332/IPN
The HEALPix triangulation map is the multi-order HEALPix in units of probability density.

The Konus-Wind time history and spectrum will be given
in a forthcoming GCN Circular.