GRB 030320
GCN Circular 1941
Subject
Possible GRB 030320 localized by INTEGRAL
Date
2003-03-20T16:32:22Z (22 years ago)
From
Diego Gotz at IASF-CNR <diego@mi.iasf.cnr.it>
S. Mereghetti, D. Gotz, J. Borkowski on behalf of the IBAS Localization
Team, A. Paizis, V. Beckmann, M. Turler on behalf the INTEGRAL Science
Data Centre and the INTEGRAL Science Working Team report the detection of
a possible GRB at 10:11:40 UTC.
The burst lasted about 80 seconds.
The preliminary position is RA 17h 51m 43s DEC -25deg 18' 34'' (J2000).
The burst has been detected at large off-axis angle, near the edge of the
field of view of IBIS. The uncertainty on the above position is 5' radius.
This message may be cited.
GCN Circular 1942
Subject
IPN triangulation of GRB030320
Date
2003-03-20T17:42:36Z (22 years ago)
From
Kevin Hurley at UCBerkeley/SSL <khurley@sunspot.ssl.berkeley.edu>
K. Hurley and T. Cline, on behalf of the Ulysses, Mars Odyssey,
and KONUS GRB teams,
I. Mitrofanov, D. Anfimov, A. Kozyrev, M. Litvak and A. Sanin, on
behalf of the HEND-Odyssey GRB team,
W. Boynton, C. Fellows, K. Harshman, C. Shinohara and R. Starr, on
behalf of the GRS-Odyssey GRB team,
E. Mazets and S. Golenetskii, on behalf of the Konus-Wind GRB team, and
A. von Kienlin, G. Lichti, and A. Rau, on behalf of the
INTEGRAL SPI-ACS GRB team, report:
Konus, Mars Odyssey (HEND), and INTEGRAL (SPI-ACS) observed this
event (GCN 1941). We confirm that this is indeed a gamma-ray
burst. Because the burst arrived along a direction close
to the Konus-Mars vector, the triangulation annulus is imprecise.
It is centered at RA, Decl = 280.256, -23.488 degrees, and
has a radius 11.122 +/- 0.456 degrees. This annulus is consistent
with, but does not constrain, the IBIS localization in GCN 1941.
Ulysses data are expected within 24 hours, and may improve this
triangulation.
GCN Circular 1943
Subject
IPN triangulation of GRB030320 (small error box)
Date
2003-03-21T16:54:25Z (22 years ago)
From
Kevin Hurley at UCBerkeley/SSL <khurley@sunspot.ssl.berkeley.edu>
K. Hurley and T. Cline, on behalf of the Ulysses, Konus, and Mars Odyssey GRB teams,
I. Mitrofanov, D. Anfimov, A. Kozyrev, M. Litvak and A. Sanin,
on behalf of the HEND/Odyssey GRB team,
W. Boynton, C. Fellows, K. Harshman, C. Shinohara and R. Starr,
on behalf of the GRS/Odyssey GRB team,
E. Mazets and S. Golenetskii, on behalf of the Konus-Wind GRB team,
D. M. Smith, R. P. Lin, J. McTiernan, R. Schwartz, C. Wigger, W.
Hajdas, and A. Zehnder, on behalf of the RHESSI GRB team, and
A. von Kienlin, G. Lichti, and A. Rau, on behalf of the
INTEGRAL SPI-ACS GRB team, report:
Ulysses, Mars Odyssey (HEND and GRS), Konus-Wind, RHESSI, and INTEGRAL
(SPI-ACS) observed this GRB at 36720 seconds (GCN 1941, 1942). As
observed by Ulysses, it had a duration of approximately 50 seconds, a
25-100 keV fluence of approximately 1.1E-05 erg/cm2, and a peak flux
of approximately 6.7E-07 erg/cm2 s over 0.50 seconds.
We have triangulated it to a preliminary, 3 sigma error box whose
approximate area is 1000 sq. arcmin. and whose coordinates are:
RA(2000) DEC(2000)
ERROR BOX CENTER: 17 h 51 m 58.46 s -25 o 14 ' 24.52 "
ERROR BOX CORNER 1: 17 h 51 m 05.79 s -25 o 26 ' 56.97 "
ERROR BOX CORNER 2: 17 h 57 m 39.45 s -23 o 22 ' 49.88 "
ERROR BOX CORNER 3: 17 h 47 m 34.20 s -26 o 42 ' 28.35 "
ERROR BOX CORNER 4: 17 h 52 m 52.62 s -25 o 01 ' 24.10 "
The Ulysses-Konus annulus may be used to constrain the IBIS error circle
(GCN 1941) and reduce its area by a factor of about 1.8, to
44 sq. arcmin. The intersection points are:
RA (2000) DEC (2000)
17 h 51 m 24.08 s -25 o 21 ' 09.30 "
17 h 51 m 47.70 s -25 o 13 ' 40.69 "
17 h 51 m 42.63 s -25 o 23 ' 33.78 "
17 h 52 m 03.80 s -25 o 16 ' 51.37 "
A map will be posted shortly at ssl.berkeley.edu/ipn/030320. This
error box may be improved.
GCN Circular 1946
Subject
GRB 030320: Optical Observations
Date
2003-03-24T14:49:59Z (22 years ago)
From
Avishay Gal-Yam at Tel Aviv U, Israel <avishay@wise1.tau.ac.il>
A. Gal-Yam and E. O. Ofek (Wise observatory, TAU) report:
We have observed the full error box of GRB 030320 (Mereghetti et al. 2003,
GCN 1341; Hurley et al. 2003, GCN 1943) using the Wise observatory 1m
telescope + Tek CCD camera, starting March 21, 02:42 UT (16.9 hours after
the burst). Two 300 s R-band frames were obtained under poor conditions
at high airmass.
Comparison of the combined image with the POSS-II E plate
reveals no new optical sources, to a limiting magnitude of R=17.5,
within the IBIS error circle.
[GCN OPS NOTE (24mar03): This submission was delayed 2.5 hours
due to an email account change. And in general, I remind people
to help me help you by keeping me advised of your address changes.]