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GCN Circular 36156

Subject

Improved IPN triangulation of GRB 240411A

Date

2024-04-18T10:47:24Z (22 days 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 MGNS/BepiColombo team,

J. Benkhoff on behalf of the BepiColombo team,

D. Svinkin, D. Frederiks,  A. Lysenko, A. Ridnaia,
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,

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 error box (Svinkin et al., GCN 36090Not found
 
 
).

The coordinates of the updated 3 sigma error box are:
 ---------------------------------------------
  RA(2000), deg                 Dec(2000), deg
 ---------------------------------------------
 Center:
  248.823 (16h 35m 17s) +43.618 (+43d 37' 03")
 Corners:
  248.867 (16h 35m 28s) +43.236 (+43d 14' 08")
  248.814 (16h 35m 15s) +43.972 (+43d 58' 19")
  248.777 (16h 35m 07s) +43.999 (+43d 59' 57")
  248.831 (16h 35m 20s) +43.263 (+43d 15' 47")
 ---------------------------------------------
The error box area is 65 sq. arcmin, and its maximum
dimension is 46 arcmin (the minimum one is 1 arcmin).
The Sun distance was 111 deg.

This box may be further improved.

Updated triangulation map and HEALPix FITS files are posted at
http://www.ioffe.ru/LEA/GRBs/GRB240411_T06302/IPN/