Further improved IPN localization for GRB 230307A
Abstract
Report using the BepiColombo (MGNS) data we have further improved the previous IPN box for GRB 230307A (Kozyrev et al., GCN Circ. 33425). The coordinates of the updated 3 sigma error box are: --------------------------------------------- RA(2000), deg Dec(2000), deg --------------------------------------------- Center: 60.867 (04h 03m 28s) -75.382 (-75d 22' 57") Corners: 60.846 (04h 03m 23s) -75.417 (-75d 25' 03") 61.006 (04h 04m 01s) -75.357 (-75d 21' 26") 60.889 (04h 03m 33s) -75.348 (-75d 20' 51") 60.728 (04h 02m 55s) -75.408 (-75d 24' 28") --------------------------------------------- The error box area is 8 sq. arcmin, and its maximum dimension is 5 arcmin (the minimum one is 1.8 arcmin). The Sun distance was 80 deg. This box may be further improved. The distance between the IPN box center and X-ray/optical transient position (X-ray Source #2 in Burrows et al., GCN Circ. 33429; Levan et al., GCN Circ. 33439; Lipunov et al. GCN Circ. 33441; O'Connor et al., GCN Circ. 33447; Im et al., GCN Circ. 33449; Vanderspek et al., GCN Circ. 33453) is 15 arcsec, which further strengthen the interpretation of transient as the burst afterglow. An updated triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB230307_T56646/IPN
- Publication:
-
GRB Coordinates Network
- Pub Date:
- March 2023
- Bibcode:
- 2023GCN.33461....1K