GRB 040223
GCN Circular 2525
Subject
GRB 040223: a long GRB detected with INTEGRAL
Date
2004-02-23T14:39:59Z (21 years ago)
From
Diego Gotz at IASF-CNR <diego@mi.iasf.cnr.it>
D. Gotz, S. Mereghetti, M. Beck, J. Borkowski on behalf of the IBAS
Localization Team, S. Shaw and N. Mowlavi on behlaf of the INTEGRAL
Science Data Centre and the INTEGRAL Science Working Team report:
A long GRB has been detected with the INTEGRAL Burst Alert System (IBAS)
at 2004-02-23T13:28:10 UTC. The GRB has been detected with IBIS/ISGRI
in the 15-200 keV band. The refined coordinates (J2000) are:
R.A. 16h 39m 34s
Dec. -41deg 55' 46''
with an uncertainty of 2.5 arcmin.
Further analysis is on-going and will be communicated through GCNs.
This message can be cited.
GCN Circular 2526
Subject
GRB 040223: further offline analysis
Date
2004-02-23T15:59:13Z (21 years ago)
From
Diego Gotz at IASF-CNR <diego@mi.iasf.cnr.it>
D. Gotz and S. Mereghetti on behalf of the IBAS Localization Team and the
INTEGRAL Science Working Team report:
The preliminary peak flux of GRB 040223 in the 20-200 keV range is about
0.4 photons/cmsq/s (3 x 10^-8 erg/cmsq/s) (1 s integration time). Offline
analysis shows besides a main peak lasting about 35 s two fainter peaks
100 and 180 seconds earlier respectively.
This messages can be cited.
GCN Circular 2528
Subject
GRB 040223 : Planned XMM-Newton observation
Date
2004-02-23T17:37:00Z (21 years ago)
From
Norbert Schartel at XMM-Newton/ESA <too@xmm.vilspa.esa.es>
XMM-Newton will observe GRB 040223 at location
(RA=16h 39m 34s, DEC=-41d 55' 45", J2000),
starting at 17:43:40 UT, on February 23, 2004,
for an exposure of 45300 seconds.
GCN Circular 2530
Subject
GRB 040223 XMM-Newton observation ...
Date
2004-02-23T22:01:04Z (21 years ago)
From
Norbert Schartel at XMM-Newton/ESA <too@xmm.vilspa.esa.es>
Michel G. Breitfellner, Puri Munuera and Alberto Martos report:
Due to automated procedure errors, XMM-Newton has issued two
GCN circulars today with incorrect subject headers. We here
re-issue the latest circular with a corrected header. Procedures
are being updated to avoid a recurrence of this problem.
:==>
Quick-Look-Analysis of the XMM-Newton observation of the
GRB040223 field (D. Gotz et al. GCN 2525), based on
7 ks exposures in the EPIC pn and MOS cameras,
respectively, shows the presence of a source within the
INTEGRAL error circle.
XMMU J163929.9-415601 (J2000):
R.A. = 16h 39m 29.9s Decl. = -41deg 56' 1.4"
with an estimated EPIC/pn count rate of 0.002 [counts/sec];
At this stage of reduction the position error is expected to
be less than 6".
GCN Circular 2531
Subject
GRB 040223: REM IJK Observations
Date
2004-02-24T10:02:32Z (21 years ago)
From
Daniele Malesani at SISSA-ISAS,Trieste,Italy <malesani@sissa.it>
G.L. Israel, S. Covino, G. Tosti, V. Testa, M. Stefanon, E. Molinari, P. Conconi,
F.M. Zerbi, G. Chincarini, M. Rodono', L.A. Antonelli, G. Cutispoto, L. Nicastro,
L. Burderi, S. Campana, C. Campeggi, G. Crimi, R. Cunniffe, J. Danziger, A. Di Paola,
A. Fernandez-Soto, F. Fiore, F. Frontera, D. Fugazza, G. Gentile, G. Ghisellini,
P. Goldoni, B. Jordan, D. Lazzati, D. Lorenzetti, D. Malesani, E. Martinetti,
N. Masetti, R. Mazzoleni, B. Mc Breen, A. Melandri, S. Messina, E. Meurs, A. Monfardini,
G. Nucciarelli, M. Orlandini, J. Paul, E. Palazzi, E. Pian, P. Saracco, S. Sardone,
A. Simoncelli, L. Stella, G. Tagliaferri, M. Tavani, S. Vergani, and F. Vitali, report:
The REM telescope, currently in commissioning phase, observed the field
of the INTEGRAL GRB 040223 (Gotz et al., GCN 2525) starting on February 24
at 06:05 UT (16.6 h after the burst). Several 1-minute exposures were acquired
in the H and Ks bands with the REMIR Infrared camera, as well as in the I band
with the ROSS slitless imaging spectrograph. The seeing was approximately 1.5".
No transient was found in any of the collected images, with the following upper limits:
I > 17.0
H > 15.5
Ks > 15.0
A more refined analysis is in progress. Given the high Galactic extinction
towards this line of sight (A_V ~ 6 mag, A_K ~ 0.6 mag), we encourage
further NIR observations.
This message may be cited.
GCN Circular 2532
Subject
GRB 040223, VLA observations
Date
2004-02-24T22:11:10Z (21 years ago)
From
Alicia Soderberg at Caltech <ams@astro.caltech.edu>
A. M. Soderberg (Caltech) and D. A. Frail (NRAO) report on
behalf of a larger Caltech/NRAO/Carnegie GRB collaboration:
"We observed the field of GRB 040223 (GCN 2525) with the Very
Large Array at 4.9 and 8.5 GHz on Feb 24.58 UT (t=1.0 d).
We do not detect a radio source within the XMM error circle
(GCN 2529) and place the following 2-sigma limits on the field:
200 and 174 uJy at 4.9 and 8.5 GHz, respectively."
GCN Circular 2533
Subject
XMM-Newton Images of GRB 040223
Date
2004-02-25T16:16:52Z (21 years ago)
From
Norbert Schartel at XMM-Newton/ESA <nscharte@xmm.vilspa.esa.es>
R. Gonzalez-Riestra and P. Rodriguez-Pascual from the
XMM-Newton SOC report:
Preliminary EPIC-pn images, light-curves and spectra
from the XMM-Newton observation of the field of
GRB 040223 are available at the home-page of the
XMM-Newton Science Operations Centre:
http://xmm.vilspa.esa.es/external/xmm_news/items/grb040223/index.shtml
The XMM-EPIC exposure started less than 5 hours after
the occurrence of the outburst, this being the fastest
XMM-Newton ToO response to date. The light curve of the
source reported in GCN 2530, XMMU J163929.9-415601, is
highly variable, decreasing from 0.08 to 0.03 counts/sec
(0.3-9 keV) during the 42 ksec of the observation.
The EPIC-pn spectrum of XMMU J163929.9-415601 is absorbed
below 1 keV, consistent with a Hydrogen column density
of 1.7E22 cm-2. The observed flux in the 2-10 keV band
is approximately 2.4E-13 erg cm-2 s-1.
GCN Circular 2534
Subject
GRB 040223 : Optical observation (non-detection)
Date
2004-02-26T17:22:36Z (21 years ago)
From
Andreja Gomboc at LT,ARI,Liverpool JMU <ag@astro.livjm.ac.uk>
A. Gomboc, J.M. Marchant, R.J. Smith, C.J. Mottram and S.N. Fraser
(Astrophysics Research Institute, Liverpool John Moores University)
The Faulkes Telescope North (Hawaii) observed the field of the INTEGRAL
GRB 040223 (Gotz et al., GCN 2525) during commissioning testing starting
on 23 February at 15:02:19 UT (1.5 hours after the burst). 17 exposures
ranging from 100 to 300 seconds were taken before twilight became too
bright to continue.
No optical counterpart was identified with an SDSS r'-band magnitude r' <
18.
Further optical observations are not planned.
GCN Circular 2535
Subject
GRB 040223: Deep NIR NTT observations
Date
2004-02-26T21:21:38Z (21 years ago)
From
Gianpiero Tagliaferri at OAB-INAF <taglia@merate.mi.astro.it>
G. Tagliaferri, D. Fugazza, S. Covino, N. Cucchiara, P. D'Avanzo,
S. Kalogerakos, A. Simoncelli, F.M. Zerbi (INAF-OAB);
G. Chincarini (UNIMIB & INAF-OAB); O. Hainaut (ESO-La Silla);
G.L. Israel, L. Stella (INAF-OAR); D. Malesani (SISSA);
on behalf of a larger collaboration report:
We observed the field of the INTEGRAL GRB 040223 (Gotz et al. GCN 2525)
with SofI at the ESO-NTT telescope in the JHKs filters. We observed this
field three times, at Feb 24.258, Feb 24.383 and Feb 25.361 UT (i.e. 0.70,
0.82, and 1.8 days after the GRB). In the Ks-band the seeing was of 1.0,
0.6 and 0.7 arcsec, respectively.
We detect 32 sources with Ks magnitude between 15.0 and 19.9 within a
square box of 12.5 arcsec, which corresponds to the XMM-Newton error
circle (Breitfellner et al. GCN 2530). The brightest five have the
following
magnitudes (calibrated to the 2MASS):
Ra(2000) Dec(2000) K1s K2s K3s
-----------------------------------------------------------------------
16:39:30.2 -41:56:03.3 14.91 +/- 0.11 14.93 +/- 0.08 15.00 +/- 0.10
16:39:29.3 -41:56:01.2 15.48 +/- 0.11 15.44 +/- 0.08 15.52 +/- 0.10
16:39:29.5 -41:55:59.8 15.55 +/- 0.12 15.58 +/- 0.09 15.61 +/- 0.10
16:39:29.6 -41:56:08.8 16.28 +/- 0.12 16.15 +/- 0.08 16.25 +/- 0.10
16:39:29.5 -41:56:06.2 16.70 +/- 0.12 16.62 +/- 0.09 16.76 +/- 0.10
We do not observe significant variability for the sources detected in the
XMM-Newton error box between the three exposures. Therefore, we have no
indication of a transient associated with the XMM-Newton source. A full
analysis of these data is in progress. More observations at ESO are not
planned.
For the NTT SofI Ks finding charts and the list of sources detected in
the XMM-Newton
error box, see http://www.merate.mi.astro.it/~taglia/GRB040223/grb.html
We thank the ESO La Silla staff for their prompt reaction and support.
This message can be cited.
GCN Circular 2547
Subject
GRB040223, improved XMM position
Date
2004-03-17T15:08:40Z (21 years ago)
From
Andrea De Luca at IASF-CNR,Milano <deluca@mi.iasf.cnr.it>
A. De Luca (IASF, Milan, on behalf of Progetto Swift Italia), S.
Mereghetti, A. Tiengo (IASF, Milan), S. Campana (OAB-Merate) report:
We have obtained an improved position for the likely afterglow of the
INTEGRAL GRB 040223 (GCN 2525)
Astrometry of the XMM-Newton/EPIC images was done by matching X-ray
sources in the field to stars in the USNO-B1 catalogue. The refined
position (J2000) for the X-ray afterglow (source XMMU J163929.9-415601,
GCN 2530) is:
RA:16h 39m 30.17s Dec:-41d 55' 59.7''
The 1 sigma error radius is 1.5 arcsec (including the rms error on the
cross-correlation as well as systematic uncertainties in the optical
catalogue).
This message may be cited.
GCN Circular 2548
Subject
GRB 040223: XMM-Newton results
Date
2004-03-17T17:33:13Z (21 years ago)
From
Sandro Mereghetti at IASF/CNR <sandro@mi.iasf.cnr.it>
A.Tiengo, S.Mereghetti, A.De Luca (IASF-Milano) report:
A preliminary analysis of the XMM-Newton TOO observation (Gonzalez-Riestra
and Rodriguez-Pascual GCN 2533) of the INTEGRAL GRB 040223 (Gotz et al.
GCN 2525) gives the following results for the X-ray afterglow:
The average spectrum is well fit by a steep power law with photon index
2.8+/-0.2, absorption (1.75+/-0.2)x10^22 cm^-2, and observed flux
2.6x10^-13 erg cm^-2 s^-1 (2-10 keV).
The source is fading, with a temporal decay well described by a power law
with index (1.0+/-0.2).
The ~40 ksec long XMM-Newton observation started at 18:54 UT of February
23, 2004.
This message may be cited.
GCN Circular 2549
Subject
GRB040223: Deep NIR NTT data re-analysis
Date
2004-03-18T14:48:32Z (21 years ago)
From
Gianpiero Tagliaferri at OAB-INAF <taglia@merate.mi.astro.it>
A. Simoncelli, P. D'Avanzo, S. Campana, S. Covino, D. Fugazza,
A. Cucchiara, S. Kalogerakos, G. Tagliaferri, F.M. Zerbi (INAF-OAB);
G. Chincarini (UNIMIB & INAF-OAB); G.L. Israel, L. Stella (INAF-OAR);
D. Malesani (SISSA); A. De Luca (IASF, Milan) on behalf of a larger
collaboration report:
Following the improved position for the likely afterglow of GRB
040223 (GCN 2525) provided by De Luca et al. (GCN 2547), we
re-analysed our NTT + SofI data (JHKs filters, Tagliaferri et
al. GCN 2535).
Inside the new error circle (99% confidence, 4.5'' radius)
we found 13 objects: no one of these presents a typical afterglow
behaviour (i.e. a monotonic decay).
For a list of these objects please refer to the table at the
following URL http://www.merate.mi.astro.it/~taglia/GRB040223/grb.html.
Objects within the error circle are identified with ID 1, 10, 12, 14,
16, 19, 20, 21, 23, 24, 25, 30, 32.
Limiting Ks magnitude is found to be ~ 20 (referred to the 2MASS catalog).
This message may be cited.