- GCN/INTEGRAL_POSITION
TITLE: GCN/INTEGRAL NOTICE
NOTICE_DATE: Tue 06 Jan 04 17:55:27 UT
NOTICE_TYPE: INTEGRAL Wakeup
TRIGGER_NUM: 1345, Sub_Num: 0
GRB_RA: 178.0642d {+11h 52m 15s} (J2000),
178.1148d {+11h 52m 28s} (current),
177.4352d {+11h 49m 44s} (1950)
GRB_DEC: -46.7609d {-46d 45' 38"} (J2000),
-46.7832d {-46d 46' 59"} (current),
-46.4827d {-46d 28' 57"} (1950)
GRB_ERROR: 3.22 [arcmin, radius, statistical only]
GRB_INTEN: 8.58 [sigma]
GRB_TIME: 64516.81 SOD {17:55:16.81} UT
GRB_DATE: 13010 TJD; 6 DOY; 04/01/06
SC_RA: 193.17 [deg] (J2000)
SC_DEC: -45.30 [deg] (J2000)
SUN_POSTN: 287.09d {+19h 08m 21s} -22.51d {-22d 30' 30"}
SUN_DIST: 85.80 [deg]
MOON_POSTN: 96.40d {+06h 25m 35s} +26.95d {+26d 56' 57"}
MOON_DIST: 104.03 [deg]
GAL_COORDS: 292.50, 14.91 [deg] galactic lon,lat of the burst
ECL_COORDS: 201.42,-42.66 [deg] ecliptic lon,lat of the burst
COMMENTS: INTEGRAL GRB Coordinates.
- GCN notice #2505
S Mereghetti, D.Gotz, M. Beck and J. Borkowski on behalf of the IBAS
Localization Team, S.Shaw on behalf of the INTEGRAL Science Data
Centre and the INTEGRAL Science Working Team report:
A GRB lasting about 60 s has been detected with IBAS at 17:55:12 UTC.
The GRB has been detected in IBIS/ISGRI data in the 15-200 keV energy
band.
The coordinates (J2000) are R.A. 11h 52m 17.7Dec. -46deg 47' 15'' with an
uncertainty of 3 arcmin.
This message can be cited
- GCN/INTEGRAL_POSITION
TITLE: GCN/INTEGRAL NOTICE
NOTICE_DATE: Tue 06 Jan 04 19:25:02 UT
NOTICE_TYPE: INTEGRAL Offline
TRIGGER_NUM: 1345, Sub_Num: 1
GRB_RA: 178.0735d {+11h 52m 18s} (J2000),
178.1241d {+11h 52m 30s} (current),
177.4445d {+11h 49m 47s} (1950)
GRB_DEC: -46.7875d {-46d 47' 14"} (J2000),
-46.8098d {-46d 48' 34"} (current),
-46.5093d {-46d 30' 32"} (1950)
GRB_ERROR: 3.00 [arcmin, radius, statistical only]
GRB_INTEN: 8.58 [sigma]
GRB_TIME: 64516.81 SOD {17:55:16.81} UT
GRB_DATE: 13010 TJD; 6 DOY; 04/01/06
SC_RA: 193.17 [deg] (J2000)
SC_DEC: -45.30 [deg] (J2000)
SUN_POSTN: 287.09d {+19h 08m 21s} -22.51d {-22d 30' 30"}
SUN_DIST: 85.78 [deg]
MOON_POSTN: 96.40d {+06h 25m 35s} +26.95d {+26d 56' 57"}
MOON_DIST: 104.04 [deg]
GAL_COORDS: 292.52, 14.88 [deg] galactic lon,lat of the burst
ECL_COORDS: 201.44,-42.67 [deg] ecliptic lon,lat of the burst
COMMENTS: INTEGRAL GRB Coordinates.
- GCN notice #2506
D. Gotz and S. Mereghetti on behalf of the IBAS Localization Team and the
INTEGRAL Science Working Team report:
Preliminary analysis of GRB 040106 gives a peak flux of about 0.6
photons/cm^2/s (6.5 x 10^-8 erg/cm^2/s) in the 20-200 keV range
(integration time of 1 s).
This message can be cited.
- GCN notice #2507
XMM-Newton will observe GRB 040106 at location (RA=11h 52m 18s,
DEC=-46d 47' 14", J2000),
starting from 23:05 UT, on January 06, 2004, for an exposure of 45000
seconds.
- GCN notice #2508
M. Ehle, R. Gonzalez-Riestra and B. Gonzalez-Garcia, from the
XMM-Newton SOC report:
Quick-Look-Analysis of the first 30 ksec of the XMM-Newton
observation of the GRB040106 field (Mereghetti et al.,
GCN 2505) shows the presence of a bright source in the
EPIC-pn and MOS cameras within the INTEGRAL error circle,
XMMU J115213.1-464713:
R.A. (J2000) = 11h 52m 13.1s
Dec. (J2000) = -46deg 47' 13"
The EPIC-pn count rate decreased from 0.7 to 0.2 counts/sec
during the first 30 ksec of the observation.
At this stage of reduction the position error is expected
to be less than 10 arcsec.
- GCN notice #2509
P.A. Price (IfA), N. Morell (La Plata, Argentina), S.R. Kulkarni
(Caltech) and J. Fulbright (OCIW) report:
We have observed the error circle of the INTEGRAL GRB 030106 (GCN
#2505) with the Swope 40-inch telescope at Las Campanas Observatory,
commencing at Jan 7.32 UT. Observations consisted of 2x600 sec
exposures in the Washington T2 filter (central wavelength ~ 8000A) and
cover the entire INTEGRAL error circle to a limiting magnitude of
approximately R ~ 21 mag.
Within the XMM error circle (GCN #2508), we identify four sources, two
of which are present in the Second Digitised Sky Survey images. The
other two sources are likely at too faint a level to appear in the
DSS2. The coordinates of these are:
(a) 11:52:12.56 -46:47:15.3 J2000 R ~ 20.7 mag
(b) 11:52:13.87 -46:47:06.5 J2000 R ~ 20.5 mag (edge)
Position errors are approximately 0.4". Estimated (statistical)
magnitude errors are 0.2 mag.
This message may be cited.
- GCN notice #2511
E. Palazzi, N. Masetti, F.M. Zerbi, E. Molinari, G. Tosti, G. Chincarini,
S. Covino, A. Di Paola, D. Fugazza, V. Testa, M. Rodono', L.A. Antonelli,
P. Conconi, G. Cutispoto, L. Nicastro, L. Burderi, S. Campana, C. Campeggi,
G. Crimi, R. Cunniffe, J. Danzinger, A. Fernandez-Soto, F. Fiore,
F. Frontera, G. Gentile, G. Ghisellini, P. Goldoni, G. Israel, B. Jordan,
D. Lazzati, D. Lorenzetti, D. Malesani, E. Martinetti, R. Mazzoleni,
B. Mc Breen, A. Melandri, S. Messina, E. Meurs, A. Monfardini,
G. Nucciarelli, M. Orlandini, J. Paul, E. Pian, P. Saracco, S. Sardone,
A. Simoncelli, M. Stefanon, L. Stella, L. Tagliaferri, M. Tavani, S. Vergani
and F. Vitali, report:
"The REM telescope, currently in commissioning phase, observed the whole
error box of the INTEGRAL GRB 040106 (Mereghetti et al., GCN #2505)
starting at 04:45 UT of 7 January 2004 (i.e. about 11 hours after the GRB
trigger) in V, R and I filters with the ROSS spectrograph/imager.
The total exposure time was 180 s for each filter.
Observations in the infrared bands with the REMIR camera were not
possible at this stage due to technical reasons.
When comparing the images with the DSS2, no new source was found within
the INTEGRAL error box down to the following limiting magnitudes:
V ~ 19.3
R ~ 18.7
I ~ 18.2
Moreover, no source was detected inside the XMM-Newton error circle
(Ehle et al., GCN #2508).
This message may be cited.".
- GCN notice #2512
Preliminary EPIC-pn images and spectra from the XMM-Newton
observation of the field of GRB 040106 are available at
the home-page of the XMM-Newton Science Operations Centre:
http://xmm.vilspa.esa.es/external/xmm_news/items/grb040106/index.shtml
RGS spectra of the bright, fading, source within the INTEGRAL
error box, XMMU J115213.1-464713 (Ehle et al. GCN 2508) are
also shown.
- GCN notice #2514
D.B. Fox and S.B. Cenko (Caltech) with R. Phelps (NSF) report:
"We have observed the error circle of the Integral GRB 040106
(Mereghetti et al., GCN 2505) on a second occasion with the Swope
40-inch telescope at Las Campanas Observatory, commencing Jan 8.28 UT.
Observations consisted of 2x600 s exposures in I-band, reaching R ~ 21
mag.
Comparison of these images to our first-epoch T2-band imaging (Price
et al., GCN 2509) reveals that the two faint sources (a) and (b) which
lie within the region of the XMM X-ray afterglow localization (Ehle,
Gonzalez-Riestra & Gonzalez-Garcia, GCN 2508) have not changed in
brightness since our first epoch, retaining the same flux to +/- 0.1
mag.
The two brighter sources within the XMM localization, which are
visible in the archival images of the DSS2, have also not varied
significantly in brightness between our two epochs (+/- 0.1 mag). We
thus identify no candidate optical counterparts within the XMM
localization, and establish a limit of R>~21 on the brightness of any
typical such counterpart at either of our epochs of observation."
- GCN notice #2515
Nicola Masetti, Eliana Palazzi (IASF/CNR, Bologna), Evert Rol, Elena
Pian (INAF, OA Trieste) and Emanuela Pompei (ESO) on behalf of GRACE,
report:
We have observed the Integral error circle of GRB 040106 (Mereghetti
et al., GCN 2505), on two consecutive nights (6-7 and 7-8 Jan 2004) at
the ESO NTT with EMMI in R band.
Within the error circle of the XMM-Newton counterpart (Ehle et al.,
GCN 2508), we find only one source which shows a clear fading
behaviour, as follows:
mid obsdate, UT filter exptime magnitude err(magn)
07/01/04, 08:33 R 10 min 22.4 0.1
08/01/04, 08:25 R 20 min 23.7 (*) 0.3
* 2 sigma detection
The magnitudes are calibrated using the USNO-A2.0 star U0375_14656270,
located at coordinates RA = 11:52:18.18, Dec = -46:46:54.3 (J2000),
assuming it has magnitude R = 17.1. The magnitude errors are
statistical only, i.e. they do not include any zero point errors.
All other sources within the XMM-Newton error circle show no sign of
fading, confirming the findings by Fox et al. (GCN 2514). We therefore
identify the fading source as the likely optical afterglow of GRB
040106.
The position of the afterglow is
RA = 11 52 12.27 (J2000)
Dec = -46 47 15.8 (J2000)
with a 0.5 arcsecond error in both coordinates.
The NTT images can be viewed at
http://www.bo.iasf.cnr.it/~masetti/grb040106.html (source 5 in the
images is the afterglow).
Further observations at all wavelengths are encouraged.
- GCN notice #2516
M. Wieringa and D. A. Frail (NRAO) report on behalf of a larger
collaboration:
"Beginning at 2004 Jan. 10 14:15 UT we carried out an observation at a
frequency of 8.6 GHz with the Australia Telescope Compact Array (ATCA)
centered on the bright XMM X-ray source (GCN# 2508,2512) within the
INTEGRAL error circle (GCN#2505). A 160 uJy radio source was detected
with 5-sigma significance 1.8 arcsec from center of the XMM error
circle at (epoch J2000), R.A.=11:52:13.16, Dec.=-46:47:11.3, with an
uncertainty of +/-0.5 arcsec. This radio source is not coincident with
any of the optical sources reported earlier (GCN#'s 2509,2511,2514 and
2515).
Further observations are planned."
- GCN notice #2520
J. A. Tedds (University of Leicester) and D. Watson (University of
Copenhagen) report on behalf of a larger collaboration:
The XMM-Newton EPIC coordinates were refined by matching the X-ray sources
in the field to the USNO-A2 catalogue. The cross-correlation is extremely
good and yields a final source position (J2000) for the X-ray afterglow of
RA: 11 52 12.43, Dec: -46 47 15.9
The 1 sigma error radius is 0.7" (including the residual 0.5" systematic
error from the correlation that is observed in the 1XMM catalogue).
This is not precisely consistent with the position of the fading optical
source reported by Masetti et al. (GCN 2515). However we note that the
position of the star listed as #4 in the image provided by Masetti et al.,
which corresponds to the USNO-B1 source 0432-0297902 and the relative
position of another star in the field (USNO-B1 0432-0297908), both imply a
shift of ~1" in their coordinates in R.A. Correcting for this shift we find
the optical transient position consistent with the XMM-Newton
position given
above. This position is not coincident with that of the radio source
reported by Wieringa & Frail (GCN 2516).
- GCN notice #2521
D. A. Frail (NRAO), M. Wieringa (ATNF) and A. M. Soderberg (Caltech)
report on behalf of a larger collaboration:
"On 2004 Jan. 21.48 UT we carried out follow-up observations with the
VLA centered on the XMM X-ray source (GCN# 2508,2512) within the
INTEGRAL error circle (GCN#2505). We did not detect the ATCA radio
source claimed earlier (GCN#2516) in the preliminary XMM error circle.
The VLA flux density limits at the position of the revised XMM error
circle (GCN#2520) are 4 +/- 50 microJy and -77 +/- 85 microJy, at 8.46
and 4.86 GHz, respectively.
No further observations are planned."
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