GRB 000126
GCN Circular 525
Subject
IPN localization of GRB000126
Date
2000-01-28T01:09:27Z (25 years ago)
From
Kevin Hurley at UCBerkeley/SSL <khurley@sunspot.ssl.berkeley.edu>
K. Hurley, on behalf of the Ulysses GRB team, and T. Cline
and E. Mazets, on behalf of the Konus-Wind and NEAR GRB
teams, report:
Ulysses, Konus, and NEAR detected a ~100 s long GRB, whose 25-100 keV
fluence was ~10^-5 erg/cm^2, at 84402 s UT on January 26, 2000. The
burst can only be localized at present to two alternate error boxes,
each ~55 sq. arcmin. in area, whose corners are at:
RA(2000) DEC(2000)
6 h 35 m 44.61 s -8 o 43 ' 10.60 "
6 h 36 m 31.96 s -8 o 29 ' 26.94 "
6 h 36 m 19.35 s -8 o 37 ' 49.17 "
6 h 37 m 7.39 s -8 o 23 ' 55.09 "
OR
RA(2000) DEC(2000)
7 h 45 m 40.70 s 7 o 53 ' 53.12 "
7 h 44 m 42.48 s 7 o 43 ' 2.86 "
7 h 45 m 16.97 s 7 o 45 ' 38.87 "
7 h 44 m 18.05 s 7 o 34 ' 38.23 "
These error boxes can be refined, and there is a slight possibility
that further analysis will make it possible to eliminate one
of them.
GCN Circular 526
Subject
BATSE location of GRB000126
Date
2000-01-28T16:23:37Z (25 years ago)
From
R. Marc Kippen at BATSE/UAH/MSFC <marc.kippen@msfc.nasa.gov>
R. M. Kippen (UAH/MSFC) reports on behalf of the BATSE GRB Team:
GRB000126 was detected by BATSE as trigger #7971 at 84389.625 s UT on
2000 January 26. BACODINE/GCN locations were not issued because the
trigger began in a real-time telemetry gap. The burst emission
consists of several pulses lasting more than 70 s. The preliminary
BATSE location is (R.A., Dec. J2000) = (116.7, 6.9 deg), with a total
(statistical+systematic) error radius of 2.4 deg (68% Conf.). This
location rules out one of the two possible IPN error boxes (GCN 525),
which means that the most probable IPN error-box is:
RA(2000) DEC(2000)
7 h 45 m 40.70 s 7 o 53 ' 53.12 "
7 h 44 m 42.48 s 7 o 43 ' 2.86 "
7 h 45 m 16.97 s 7 o 45 ' 38.87 "
7 h 44 m 18.05 s 7 o 34 ' 38.23 "
This box is within about 0.8 deg of the independent BATSE location.
-eof-
GCN Circular 527
Subject
GRB000126, optical observations
Date
2000-02-01T01:24:39Z (25 years ago)
From
Alan H. Diercks at Caltech <ad@astro.caltech.edu>
T.S. Axelrod, B.P. Schmidt (Mt. Stromlo Observatory), J.S. Bloom,
A. Diercks, and T.J. Galama (Caltech) report on behalf of the REACT
GRB follow-up network:
We have observed the error region of GRB000126, detected by the IPN (Hurley et
al, GCN #525) and refined by BATSE (Kippen, GCN #526) with the Mt. Stromlo
Observatory 50-inch telescope + MACHO camera system Jan 29 and Jan 30 UT, 60
and 80 hours after the event respectively.
Two sets of 3x300s exposures were taken with mean epochs of observation of Jan
29.476 UT and Jan 30.540 UT. Comparison of the MACHO_Red images (~ Cousins
R-band) via difference imaging reveals that no objects with 19.3 > R > 13.0
varied by more than the flux equivalent point-source of R = 19.0 between the
two epochs. Unfortunately, the detection limit in each epoch varied from R ~
19.3 - 20.0 due to cloudy conditions.
This message may be cited.
GCN Circular 528
Subject
GRB 000126, optical observations
Date
2000-02-01T20:35:24Z (25 years ago)
From
Alberto Castro-Tirado at Inst.de Astro. de Andalucia <ajct@iaa.es>
GRB 000126, optical observations
--------------------------------------
Alberto Castro-Tirado, LAEFF-INTA (Madrid) and IAA-CSIC (Granada)
Rene Hudec and Jan Soldan, ASU (Ondrejov)
Petr Pata and Martin Bernas, CVUT-FEL (Prague)
Jose Maria Castro Ceron, ROA (San Fernando)
Javier Gorosabel, LAEFF-INTA (Madrid) and DSRI (Copenhagen)
on behalf of the BOOTES-1 Collaboration
and Kevin Hurley, SSL (Berkeley)
report:
"We have obtained several images of the IPN error box for
GRB 000126 (Hurley et al. GCN 525, Kippen et al. GCN 526) with
the wide-field CCD of BOOTES-1 on Jan 27.89 UT (22-h after the
GRB, 5-min exposure time) and with the narrow-field CCD attached
to the 0.3-m telescope on Jan 28.89 UT (46-h after the event,
10-min exposure time). Limiting magnitudes of the unfiltered
images are about 11 and 19 respectively. None of them reveals
any new (or strongly variable source) when comparing with the
Digital Sky Survey, in agreement with the results obtained by
Axelrod et al. (GCN 527). The two images are posted at
http://www.laeff.esa.es/~ajct/GRBs/GRB000126."
This message is quotable.
GCN Circular 533
Subject
GRB000126 Optical Observations
Date
2000-02-05T12:39:13Z (25 years ago)
From
Kjetil Kjernsmo at U. of Oslo <kjetil.kjernsmo@astro.uio.no>
K. Kjernsmo, A. Jaunsen and OE. Saanum (U. of Oslo)
B. L. Jensen, J. Hjorth, H. Pedersen (U. of Copenhagen)
J. Gorosabel (DSRI, Copenhagen) report:
"We have obtained a 300s R-band image of the central third of the
IPN/BATSE errorbox of GRB 000126 (Hurley et al. GCN #525,
Kippen GCN #526) on 2000 Jan 28.14 UT with the 2.5m Nordic
Optical Telescope.
From comparison with DSS-I, we found no obvious optical GRB
counterparts in this part of the errorbox down to the limit of DSS
(R~19.5). The NOT image has a seeing of 1.9" and a limiting
magnitude of 22.2 (4 sigma)."