GRB 990915
GCN Circular 416
Subject
GRB 990915 optical observations
Date
1999-09-26T09:13:19Z (27 years ago)
From
Alberto Castro-Tirado at LAEFF-INTA <ajct@laeff.esa.es>
GRB 990915, optical observations
---------------------------------
Alberto Castro-Tirado, LAEFF-INTA (Madrid) and IAA-CSIC (Granada)
on behalf of a large collaboration:
Victor Costa and Jose L. Ortiz, IAA-CSIC
Oliver Cordes, Martin Altmann and Daniel Harbeck, Univ. of Bonn
Javier Gorosabel, LAEFF-INTA
Mara Salvato and Jochen Greiner, AIP (Potsdam)
Kevin Hurley, UCBerkeley/SSL
reports:
"Following the detection of the strong burst GRB 990915
by BATSE and COMPTEL (Batse trigger # 7766) we have obtained:
-150 frames (60-s, no filter, 20' x 13' FOV) at the 0.8-m
Schmidt telescope of the German-Spanish Calar Alto Observatory
(CAHA) starting 0.5 hr after the burst. The frames covered a
significant fraction of the Hunstville/Locburst and COMPTEL
error boxes and about a 15 % of the NEAR error box given by
Hurley et al. in GCN 412.
-25 frames (60-s, R-band, 16' x 16' FOV) at the 1.23-m CAHA
telescope starting 30 hr after the burst. The frames covered an
additional fraction (65 %) of the NEAR error box.
-10 frames (150-s, R-band) at the 1.23-m CAHA telescope starting
50 hr after the burst. The frames covered the rest (20 %) of
the NEAR error box.
After a careful visual comparison with the Digital Sky Survey,
I have not found any source varying more than 0.3 mag when comparing
to the DSS-1 charts, i.e. a limit of R > 20.5 can be imposed to the
GRB 990915 optical afterglow."
GCN Circular 412
Subject
IPN error box for GRB990915 (=BATSE 7766)
Date
1999-09-17T22:41:57Z (27 years ago)
From
Kevin Hurley at UCBerkeley/SSL <khurley@sunspot.ssl.berkeley.edu>
K. Hurley, on behalf of the Ulysses GRB team, Scott Barthelmy,
on behalf of the GCN team, and T. Cline, on behalf of the NEAR
GRB team, report:
NEAR observed BATSE trigger #7766, leading to a preliminary error
box (as opposed to just the annulus reported in GCN 410) for this
burst, whose corners are at:
RA(2000) Decl.(2000)
07 h 35 m 05 s 74o 39' 40"
07 h 05 m 51 s 72o 31' 43"
07 h 19 m 06 s 73o 47' 57"
06 h 48 m 19 s 71o 02' 41"
This error box is located roughly between the COMPTEL and LOCBURST
positions. A map may be found at ssl.berkeley.edu/ipn3/990915/. This
error box will be refined considerably when the final data become
available.
GCN Circular 410
Subject
IPN localization of BATSE #7766 (GRB990915)
Date
1999-09-16T21:08:10Z (27 years ago)
From
Kevin Hurley at UCBerkeley/SSL <khurley@sunspot.ssl.berkeley.edu>
K. Hurley, on behalf of the Ulysses GRB team, and Scott Barthelmy,
on behalf of the GCN team, report:
We have derived a preliminary IPN annulus for BATSE trigger #7766
(GRB990915) using Ulysses and BATSE data. This annulus is centered
at RA(2000)=22h 31m 51s, Decl(2000)=+14o 45' 21", and has a radius of
86.361o +/- 0.09o (3 sigma). This annulus just crosses the updated
COMPTEL contours for this burst, and slightly misses the BATSE LOCBURST
position. A map may be found at ssl.berkeley.edu/ipn3/990915/. This
annulus will be refined considerably when the final data become
available.