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GCN Circular 33808

Subject

Improved IPN triangulation of GRB 230512A

Date

2023-05-17T12:02:03Z (a year ago)

From

Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru>

A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin
on behalf of the MGNS/BepiColombo team,

J. Benkhoff on behalf of the BepiColombo 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,

and

S. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu
on behalf of the Swift-BAT team, report:

Using the BepiColombo (MGNS) data we have improved
the previous IPN box (Svinkin et al., GCN Circ. 33802Not found
 
 
),
The coordinates of the updated 3 sigma error box are:
 ---------------------------------------------
  RA(2000), deg                 Dec(2000), deg
 ---------------------------------------------
 Center:
  295.623 (19h 42m 30s) +38.267 (+38d 16' 00")
 Corners:
  295.645 (19h 42m 35s) +38.328 (+38d 19' 39")
  295.609 (19h 42m 26s) +38.353 (+38d 21' 10")
  295.601 (19h 42m 24s) +38.206 (+38d 12' 20")
  295.637 (19h 42m 33s) +38.180 (+38d 10' 49")
 ---------------------------------------------
The error box area is 15 sq. arcmin, and its maximum
dimension is 10 arcmin (the minimum one is 1.7 arcmin).
The Sun distance was 96 deg.

This box may be further improved.

None of the optical and X-ray transients found during the burst follow-up (GCNs 33784Not found
 
 
, 33789Not found
 
 
, 33796Not found
 
 
) are inside the box.

An updated triangulation map and HEALPix FITS files are posted at
http://www.ioffe.ru/LEA/GRBs/GRB230512_T23265/IPN/