- GCN/BACODINE POSITION NOTICE
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Fri 02 Jun 06 21:33:13 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 213180, Seg_Num: 0
GRB_RA: 149.576d {+09h 58m 18s} (J2000),
149.658d {+09h 58m 38s} (current),
148.934d {+09h 55m 44s} (1950)
GRB_DEC: +0.323d {+00d 19' 23"} (J2000),
+0.292d {+00d 17' 32"} (current),
+0.562d {+00d 33' 44"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 49335 [cnts] Image_Peak=592 [image_cnts]
TRIGGER_DUR: 12.160 [sec]
TRIGGER_INDEX: 491 E_range: 50-350 keV
BKG_INTEN: 238082 [cnts]
BKG_TIME: 77438.76 SOD {21:30:38.76} UT
BKG_DUR: 64 [sec]
GRB_DATE: 13888 TJD; 153 DOY; 06/06/02
GRB_TIME: 77532.46 SOD {21:32:12.46} UT
GRB_PHI: -7.71 [deg]
GRB_THETA: 44.53 [deg]
SOLN_STATUS: 0x3
RATE_SIGNIF: 13.11 [sigma]
IMAGE_SIGNIF: 7.58 [sigma]
MERIT_PARAMS: +1 +0 +0 +4 +3 +3 -5 +0 -17 +1
SUN_POSTN: 70.72d {+04h 42m 52s} +22.25d {+22d 15' 16"}
SUN_DIST: 79.66 [deg] Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN: 153.70d {+10h 14m 47s} +13.66d {+13d 39' 34"}
MOON_DIST: 13.95 [deg]
MOON_ILLUM: 40 [%]
GAL_COORDS: 238.43, 40.58 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 151.57,-11.32 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS: SWIFT-BAT GRB Coordinates.
COMMENTS: This is a rate trigger.
COMMENTS: A point_source was found.
COMMENTS: This does not match any source in the on-board catalog.
COMMENTS: This does not match any source in the ground catalog.
COMMENTS: This is a GRB.
COMMENTS: This trigger occurred at longitude,latitude = 239.32,-3.24 [deg].
- red DSS finding chart
ps-file
- GCN NOTICE
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Fri 02 Jun 06 21:35:58 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 213180, Seg_Num: 0
GRB_RA: 149.576d {+09h 58m 18s} (J2000),
149.658d {+09h 58m 38s} (current),
148.934d {+09h 55m 44s} (1950)
GRB_DEC: +0.323d {+00d 19' 23"} (J2000),
+0.292d {+00d 17' 32"} (current),
+0.562d {+00d 33' 44"} (1950)
GRB_DATE: 13888 TJD; 153 DOY; 06/06/02
GRB_TIME: 77532.46 SOD {21:32:12.46} UT
TRIGGER_INDEX: 491
GRB_PHI: -7.71 [deg]
GRB_THETA: 44.53 [deg]
DELTA_TIME: 71.00 [sec]
TRIGGER_DUR: 12.160 [sec]
SOLN_STATUS: 0x3
RATE_SIGNIF: 13.11 [sigma]
IMAGE_SIGNIF: 7.58 [sigma]
LC_URL: sw00213180000msb.lc
SUN_POSTN: 70.72d {+04h 42m 52s} +22.25d {+22d 15' 17"}
SUN_DIST: 79.66 [deg] Sun_angle= -5.3 [hr] (East of Sun)
MOON_POSTN: 153.72d {+10h 14m 52s} +13.65d {+13d 38' 60"}
MOON_DIST: 13.95 [deg]
MOON_ILLUM: 40 [%]
GAL_COORDS: 238.43, 40.58 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 151.57,-11.32 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS: SWIFT-BAT GRB Lightcurve.
COMMENTS:
COMMENTS: The next comments were copied from the BAT_POS Notice:
COMMENTS: This is a rate trigger.
COMMENTS: A point_source was found.
COMMENTS: This does not match any source in the on-board catalog.
COMMENTS: This does not match any source in the ground catalog.
COMMENTS: This is a GRB.
COMMENTS: This trigger occurred at longitude,latitude = 239.32,-3.24 [deg].
- GCN Circular #5196
P Schady (MSSL-UCL), S. D. Barthelmy (GSFC), D. N. Burrows (PSU),
J. R. Cummings (NASA/ORAU), J. A. Kennea (PSU),
H. A. Krimm (GSFC/USRA), K. M. McLean (LANL/UTD),
D. M. Palmer (LANL), T. Sakamoto (NASA/ORAU),
G. Sato (GSFC/JSPS/USRA) and M. Stamatikos (NASA/ORAU) report on
behalf of the Swift Team:
At 21:32:12 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 060602 (trigger=213180). Swift did not slew to the burst
because of the Moon constraint. The BAT on-board calculated location
is RA,Dec 149.576, +0.323 {09h 58m 18s, +00d 19' 23"} (J2000)
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve has a peak starting at
T+0 sec and ending at ~T+15 sec. The peak count rate
was ~500 counts/sec (15-350 keV), at ~2 sec after the trigger.
This burst will not become visible to Swift NFIs until June 4th, 08:46UT.
- GCN Circular #5197
Richard J. Cool (Arizona), Daniel J. Eisenstein (Arizona),
David W. Hogg (NYU), Michael R. Blanton (NYU), David
J. Schlegel (LBNL), J. Brinkmann (APO), Donald Q. Lamb
(Chicago), Donald P. Schneider (PSU), and Daniel E. Vanden
Berk (PSU) report:
The Sloan Digital Sky Survey (SDSS) imaged the field of
burst GRB060602 prior to the burst. As these data should
be useful as a pre-burst comparison and for calibrating
photometry, we are supplying the images and photometry
measurements for this GRB field to the community.
Data from the SDSS, including 5 FITS images, 3 JPGS, and
3 files of photometry and astrometry, are being placed
at http://mizar.as.arizona.edu/~grb/public/GRB060602
We supply FITS images in each of the 5 SDSS bands of a
8'x8' region centered on the GRB position (ra=149.576
(09:58:18.2), dec=0.323000 (00:19:22.8); Swift-BAT
TRIGGER 213180), as well as 3 gri color-composite JPGs
(with different stretches). The units in the FITS images
are nanomaggies per pixel. A pixel is 0.396 arcsec on a
side. A nanomaggie is a flux-density unit equal to 10^-9
of a magnitude 0 source or, to the extent that SDSS is
an AB system, 3.631e-6 Jy. The FITS images have WCS
astrometric information.
In the file GRB060602_sdss.calstar.dat, we report
photometry and astrometry of 158 bright stars (r<20.5)
within 15' of the burst location. The magnitudes presented
in this file are asinh magnitudes as are standard in the
SDSS (Lupton 1999, AJ, 118, 1406). Beware that some of
these stars are not well-detected in the u-band; use the
errors and object flags to monitor data quality.
In the files GRB060602_sdss.objects_flux.dat and
GRB060602_sdss.objects_magnitudes.dat, we report photometry
of 496 objects detected within 6' of the GRB position.
We have removed saturated objects and objects with
model magnitudes fainter than 23.0 in the r-band.
The fluxes listed in GRB060602_sdss.objects_flux.dat
are in nanomaggies while the magnitudes listed in
GRB060602_sdss.objects_magnitudes.dat are asinh magnitudes.
All quantities reported are standard SDSS photometry,
meaning that they are very close to AB zeropoints
and magnitudes are quoted in asinh magnitudes.
Photometric zeropoints are known to about 2% rms.
None of the photometry is corrected for dust extinction.
The Schlegel, Finkbeiner, and Davis (1998) predictions
for this region are A_U=0.134 mag, A_g=0.099 mag, A_r =
0.072 mag, A_i=0.054 mag, and A_z=0.038 mag.
The file GRB060602_sdss.spectro.dat contains a list of
the 4 objects with SDSS spectroscopy within 6 arcminutes
of the GRB position. In addition to the redshift and
1-sigma error for each object, this file also lists the
object spectroscopic classification.
SDSS astrometry is generally better than 0.1 arcsecond
per coordinate. Users requiring high precision astrometry
should take note that the SDSS astrometric system can
differ from other systems such as those used in other
notices; we have not checked the offsets in this region.
More detailed information pertaining to our SDSS GRB
releases can be found in our initial data release paper
(Cool et al. 2006, astro-ph/0601218). See the SDSS DR4
documentation for more details: http://www.sdss.org/dr4.
These data have been reduced using a slightly different
pipeline than that used for SDSS public data releases.
We cannot guarantee that the values here will exactly match
those in the data release in which these data are included.
In particular, we expect the photometric calibrations to
differ by of order 0.01 mag.
This note may be cited, but please also cite the SDSS data
release paper, Adelman-McCarthy et al. (2006, ApJS, in
press, astro-ph/0507711), when using the data or referring
to the technical documentation.
- GCN Circular #5201
Stanislav V=EDtek, Martin Jelinek, Alberto J. Castro-Tirado (IAA CSIC
Granada, Spain), Petr Kub=E1nek (ASU AV CR Ondrejov & ISDC, Versoix)
on behalf of the BOOTES collaboration report:
Bootes-IR telescope, located at IAA Observatory de Sierra Nevada,
observed position of GRB 060602A (S. Barthelmy GCN 5196), starting 13.7
sec post GCN notice (61.6 sec post GRB).
At images obtained at considerable airmass, we do not detect any new
object down to R~15 mag.
Futher analysis is in progress.
This message may be cited.
- GCN Circular #5203
Brian L. Jensen, Jens Hjorth, Johan Fynbo (Dark Cosmology Centre, NBI),
Jyri N=E4r=E4nen (University of Helsinki) report:
"We have observed the field of GRB060602A (Schady et al., GCN 5196) in
the R-band with the NOT+ALFOSC (La Palma), starting at June 2.908 (15
min. after the burst). All R:6x300s cover the full 3' radius BAT error
circle. Visual comparison to the SDSS (Cool et al., GCN 5197), does not
reveal any new bright sources in the field.
However, a faint source, not readily apparent on SDSS (r-band), is
observed at:
RA = 09:58:16.73
Dec = +00:18:12.7
- located 1.2' from the centre of the BAT error-circle.
A preliminary calibration to SDSS photometry of the field (Cool et al.,
GCN 5197) yields a magnitude for the source of R~22.5+-0.3. Further
observations are needed in order to determine whether the source is
transient.
A finding chart is available at:
http://www.astro.ku.dk/~brian_j/grb/grb060602.897/ "
- GCN Circular #5206
T. Sakamoto (GSFC/ORAU), L. Barbier (GSFC), S. Barthelmy (GSFC),
J. Cummings (GSFC/ORAU), E. Fenimore (LANL), N. Gehrels (GSFC),
D. Hullinger (BYU-Idaho), M. Koss (GSFC/UMD), H. Krimm (GSFC/USRA),
C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC),
G. Sato (GSFC/JSPS/USRA), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC),
on behalf of the Swift-BAT team:
Using the data set from T-119.7 to T+182.3 sec from the recent telemetry
downlink, we report further analysis of BAT GRB 060602A
(trigger #213180) (Schady, et al., GCN 5196). The BAT
ground-calculated position
is (RA,Dec) = 149.576, 0.322 deg {9h 58m 18.3s, 0d 19' 20.7"} (J2000)
+- 1.6 arcmin, (radius, sys+stat, 90% containment). The partial
coding was 43%.
The light curve shows a single broad triangular shaped peak lasting from
~T+0 to ~T+70 sec. The burst is most prominent in the 50-100 keV band and
shows clear evidence of hard to soft spectral evolution.
T90 (15-350 keV) is 60 +- 10 sec (estimated error including systematics).
The time-averaged spectrum from T-0.7 to T+67.0 is best fit by
a simple power-law model. The power law index of the time-averaged
spectrum is 1.14 +- 0.16. The fluence in the 15-150 keV band is
1.6 +- 0.1 x 10^-06 erg/cm2. The 1-sec peak photon flux measured
from T+7.74 sec in the 15-150 keV band is 0.1 +- 0.3 ph/cm2/sec.
All the quoted errors are at the 90% confidence level.
- GCN Circular #5211
T. Sakamoto (GSFC/ORAU) on behalf of the Swift-BAT team:
There is an error in the 1-s peak photon flux reported in
Sakamoto et al. (GCN Circular 5206). Due to hard and weak
nature of the burst, only the 90% upper limit of 0.5 ph/cm2/s
is possible to constrain from a power-law fit.
We apologize for this mistake. We thank Kazutaka Yamaoka for
pointing it out.
- GCN Circular #5245
A. J. Blustin (UCL-MSSL) and P. Schady (UCL-MSSL) report on behalf
of the Swift/UVOT team:
Due to a moon constraint, Swift/UVOT did not begin observing the
field of GRB060602A until 15:55:25 on 2006-06-04, 1.766 days after
the BAT trigger (Schady et al., GCN 5196). We observe no optical/UV
afterglow candidate within the refined BAT error circle (Sakamoto
et al. 5206) or at the position of the afterglow candidate reported
by the NOT team (Jensen et al., GCN 5203). 3-sigma magnitude upper
limits, in coadded images, at the position of the NOT afterglow
candidate are as follows:
Filter T_range(days) Exp(s) 3sig_UL(mag)
V 1.831-3.555 1775 21.3
B 1.827-3.567 1572 22.3
U 1.826-3.564 1775 22.1
UVW1 1.766-3.561 1850 21.7
UVM2 1.832-3.558 1922 22.0
UVW2 1.828-3.617 2265 22.3
Where the time range of the images post-trigger is given in days.
The upper limits are not corrected for Galactic extinction.
- GCN Circular #5251
K. L. Page, A. P. Beardmore (U. Leicester) and J. A. Kennea (PSU) report
on behalf of the Swift/XRT team:
We have analysed 37.8 ks of XRT data obtained for the field of GRB 060602A
(Schady et al.; GCN 5196), starting 1.8 days after the trigger, when the
burst was no longer Moon constrained.
A faint source was found within the BAT error circle, at a position of
RA(J2000) = 09 58 16.80
Dec(J2000) = +00 18 14.8
with an estimated uncertainty of 4.2 arcsec (90% containment). This source
is fading with an approximate slope of alpha = 1.10, so is very likely the
X-ray afterglow.
This source is 2.3 arcsec from the possible counterpart identified by
Jensen et al. (GCN 5203).
This circular is an official product of the Swift-XRT team.
- GCN Circular #6997
Pall Jakobsson (U. Hertfordshire), Daniele Malesani,
Johan P. U. Fynbo, Jens Hjorth, Paul M. Vreeswijk
(DARK, NBI) and Nial R. Tanvir (U. Leicester) report
on behalf of a larger collaboration:
Using FORS1 on the Very Large Telescope, we obtained
2*20 min spectra (grism 300V+GG375 covering 4000-8000 A)
of the GRB 060602A host galaxy on 28 December 2006. A firm
upper limit of z < 2.3 can be placed on the host redshift
from the lack of Ly-alpha forest lines in the combined
spectrum.
We do detect a strong emission line at 6664 A. If it
corresponds to H-alpha at z = 0.015, we would expect to
detect H-beta and the [O III] doublet in our spectrum.
However, no features are visible at their predicted
locations. In addition, this redshift would imply a very
faint absolute magnitude of M_R = -10.3.
If the emission line corresponds to [O III] 5008 at
z = 0.331, we would expect to detect [O II] 3728 which we
do not. The most probable association is with [O II] 3728,
corresponding to a redshift of z = 0.787.
Using the relations by Kennicutt (1998, ARA&A, 36, 189),
the flux of the proposed [O II] line corresponds to a star
formation rate (SFR) of approximately 1.9 M_Sun/year. This
value has not been corrected for host extinction, and is
therefore a strict lower limit to the actual SFR. The
specific SFR is around 13.6 M_Sun/year (L/L*)^-1, typical
for GRB host galaxies (Christensen et al., 2004, A&A, 425, 913).
Previous IAU Circulars 