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GCN Circular 27900

Subject
IPN triangulation of GRB 200605A (short)
Date
2020-06-07T17:20:20Z (4 years ago)
From
Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru>
K. Hurley, on behalf of the IPN,

I. G. Mitrofanov, D. V. Golovin, A. S. Kozyrev, M. L. Litvak,
and A. B. Sanin, on behalf of the HEND-Odyssey GRB team,

D. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks, A. Ridnaia,
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,

A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo,
and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,

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

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

The short-duration GRB 200605A
(Fermi-GBM detection: The Fermi GBM team, GCN Circ. 27892)
has been detected by Fermi (GBM trigger 613073867), Konus-Wind,
INTEGRAL (SPI-ACS), Mars-Odyssey (HEND), and Swift (BAT), so far,
at about 65862 s UT (18:17:42).
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:
    95.839 (06h 23m 21s) +50.954 (+50d 57' 14")
  Corners:
    96.116 (06h 24m 28s) +51.192 (+51d 11' 29")
    95.683 (06h 22m 44s) +51.188 (+51d 11' 16")
    95.565 (06h 22m 16s) +50.715 (+50d 42' 52")
    95.993 (06h 23m 58s) +50.719 (+50d 43' 09")
  ---------------------------------------------
The error box area is 460 sq. arcmin, and its maximum
dimension is 35 arcmin (the minimum one is 16 arcmin).
The Sun distance was 33 deg.

This box may be improved.

The IPN localization is consistent with, but reduces the area of, the 
Fermi-GBM final position (GCN Circ. 27892).

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB200605_T65862/IPN

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

The Swift (BAT) event data used for the IPN localization
came from the GUANO system (https://www.swift.psu.edu/guano/).
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