GRB 060219
GCN Circular 4902
Subject
GRB060219: optical observation
Date
2006-03-22T02:13:40Z (20 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
D. Sharapov (MAO, and NOT, La Palma), M. Ibrahimov, (MAO), A. Pozanenko
(IKI) and V. Rumyantsev (CrAO) on behalf of larger GRB follow up
collaboration report:
We observed the X-ray position of GRB060219 (Moretti et al., CN4788,
GCN4797) with 1.5m telescope of Maidanak Astronomical Observatory in R-band
on Feb. 20 (UT) 00:41 - 01:09. The SDSS-source (Moretti et al., GCN4801,
Rol et al., GCN4855) is clearly detected. We do not detect any other source
within or near XRT circle, in particular the faint source mentioned by Rol
et al., GCN4855. The R-photometry of the SDSS-source (=galaxy) is
following:
Mid. time, Exp., Galaxy Limit Seeing
(UT) (s)
Feb.20.039 5x300 21.46 +/- 0.11 22.7 ~1.0"
The photometry is based on SDSS stars (Cool et al., GCN4789) and
transformation (Lupton 2005). According to the SDSS derived model magnitudes
(Cool, GCN4789) brightness of the galaxy is R=21.72 and our result is
marginally consistent with pre-burst observation.
The stacked image can be found in
http://grb.rssi.ru/GRB060219/grb060219_060220_AZT22R_zoom1.jpg.
The message may be cited.
GCN Circular 4855
Subject
GRB060219: Liverpool Telescope observations
Date
2006-03-09T14:11:34Z (20 years ago)
From
Evert Rol at U.Leicester <er45@star.le.ac.uk>
E. Rol (U of Leicester), N. Tanvir (U of Hertsfordshire) and
C. Mundell (Liverpool JMU), report on behalf of a larger
collaboration:
We have observed the X-ray position of GRB060219 (Moretti, GCN4788,
GCN4797) with the 2m Liverpool Telescope, on two nights in r'- and
i'-bands. Within the images, we detect the SDSS-source mentioned by
Moretti (GCN4801). In the first epoch r'-band, a very faint source
just outside the XRT error circle can be seen as well, with r' ~ 23.4.
Image subtraction of the r'-band images between the two epochs shows
no variability of the galaxy. The faint source is not visible on the
second epoch image, but the second observation is slightly shallower
than the first observation, and its estimated source magnitude is
around the limiting magnitude of that image.
The defringed i'-band images unfortunately suffer from residual
fringing and could therefore not be used for image subtraction. No
sign of the faint source is seen in these images.
Our 3-sigma limiting magnitudes, measured in a aperture equal to 1
times the estimated seeing, and calibrated to the SDDS-r' and i'
magnitudes, are as follows:
time filter limiting
(days post trigger) magnitude
0.220 r' 23.7
4.15 r' 23.5
0.276 i' 22.9
4.17 i' 22.6
We note that the galaxy inside the XRT error circle appears to have
slightly different magnitudes than those quoted by Moretti
(GCN4801). According to the SDSS derived model magnitudes (Cool,
GCN4789), its magnitudes are u' = 25.105, g' = 22.698, r' = 21.941, i'
= 21.153 and z' = 20.491. The r' and i' magnitudes are in agreement
with the estimates from our photometry.
GCN Circular 4811
Subject
GRB 060219: Swift-BAT refined analysis
Date
2006-02-22T04:18:44Z (20 years ago)
From
Takanori Sakamoto at NASA/GSFC <takanori@milkyway.gsfc.nasa.gov>
T. Sakamoto (GSFC/ORAU), L. Barbier (GSFC), S. Barthelmy (GSFC),
J. Cummings (GSFC/ORAU), E. Fenimore (LANL), N. Gehrels (GSFC),
D. Hullinger (UMD), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD),
D. Palmer (LANL), A. Parsons (GSFC), G. Sato (ISAS), J. Tueller (GSFC),
on behalf of the Swift-BAT team:
Using the data set from T-299 to T+303 sec from the telemetry
downlinks, we report further analysis of BAT GRB 060219
(trigger #191512) (Moretti, et al., GCN 4788, Barthelmy, et al., GCN 4795).
The BAT ground-calculated position is (RA,Dec) =
241.841, 32.305 deg {16h 7m 21.8s, 32d 18' 18.6"} (J2000)
+- 2.1 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 67%.
The mask weighted light curve shows four peaks around
T-55, T-35, T+5 and T+55 sec. All 4 peaks are ~10 sec in duration.
No other emission is evident in this full data set. T90 (15-350 keV) is
(62 +- 2) sec (estimated error including systematics).
The time-averaged spectrum from T-57.1 to T+8.2 is best fit by
a simple power-law model. The power law index of the time-averaged
spectrum is 2.6 +- 0.4. The fluence in the 15-150 keV band is
(4.2 +- 0.8) x 10^-07 erg/cm2. The 1-sec peak photon flux measured
from T+4.06 sec in the 15-150 keV band is (0.6 +- 0.2) ph/cm2/sec.
All the quoted errors are at the 90% confidence level.
GCN Circular 4801
Subject
GRB 060219: SDSS galaxy inside XRT error circle
Date
2006-02-21T01:51:50Z (20 years ago)
From
Daniele Malesani at SISSA-ISAS,Trieste,Italy <malesani@sissa.it>
A. Moretti (INAF/OABr) reports on behalf of the Swift/XRT team:
We looked at the SDSS images of GRB 060219 (Moretti et al., GCN 4788;
Barthelmy et al., GCN 4795) provided by Cool et al. (GCN 4789). Inside
the revised XRT error circle (Moretti et al., GCN 4797) there is a faint
object at the coordinates (J2000):
alpha = 16:07:21.28;
delta = +32:18:58.33.
This source is visible in the g, r, i and z frames. After coadding the
g, r, and i frames (a saturation spike contaminates the z-band image),
the object has extended appearance, being elongated along the N/S
direction with FWHM~2.5", and may thus be a galaxy.
The object has (AB) magnitudes r~21.6, i~20.6, z~20.0, calibrated
against nearby SDSS sources.
This message can be cited.
GCN Circular 4799
Subject
GRB060219: SARA Observations
Date
2006-02-20T22:03:15Z (20 years ago)
From
Autumn Homewood at Clemson U <ahomewo@clemson.edu>
A.L. Homewood, K.V. Garimella, C.A. Riddle, M.R. Troutman, A.M. Manning,
S.P. Fuller, T. McIntrye, and D.H. Hartmann report on behalf of the
Clemson GRB Follow-Up Team:
We have imaged the field of GRB060219 (GCN 4788) beginning approximately
12 hours after the trigger notice with the SARA 0.9-m at Kitt Peak, under
decent weather conditions. Visual analysis of co-added frame with DSS
yields no new sources down to a limiting magnitude of R ~ 19.0 mag when
compared to USNO A2.0.
The Clemson Unversity GRB Response Site may be found at:
http://people.clemson.edu/~kgarime/burst/index.php
The SARA Homepage can be found at:
http://saraobservatory.org
This message may be cited.
GCN Circular 4798
Subject
GRB 060219: Swift/UVOT Upper Limits
Date
2006-02-20T15:01:42Z (20 years ago)
From
Alice Breeveld at MSSL-UCL <aad@mssl.ucl.ac.uk>
A. Breeveld (MSSL-UCL), A. Moretti (INAF-OAB) on behalf of the
Swift/UVOT team
The Swift/UVOT began observing the field of GRB 060219 at 22:49:50 UT
on 19th February 2006, 105s after the BAT
trigger (A.Moretti et al. GCN 4788). No source is detected at the
refined XRT position (A. Moretti GCN 4797). Analysing all the data from
the first 7000s we obtain the following 5 sigma upper limits:
Filter T_range(s) Exp(s) 5sigUL(mag)
V 120-320 200 18.6 (the Finding Chart
exposure)
V 105-5821 584 19.2
B 327-6639 631 19.8
U 652-6434 374 19.3
UVW1 628-6230 364 19.8
UVM2 604-6025 374 20.1
UVW2 556-5617 374 20.2
White 532-6704 257 19.7
Reported times are in seconds since BAT trigger.
These magnitudes are uncorrected for Galactic extinction;
E(B-V) = 0.032.
This circular is an official product of the Swift-UVOT Team.
GCN Circular 4797
Subject
GRB 060219: Swift-XRT Team refined analysis
Date
2006-02-20T12:30:27Z (20 years ago)
From
Alberto Moretti at Obs Brera Merate <moretti@merate.mi.astro.it>
A. Moretti (INAF-OAB) reports on behalf of the Swift XRT team:
Analysing the first seven orbits of data (8.6 ks in Photon Counting mode,
in the range from 120 s to 25 ks from the BAT trigger),
the following refined position for the X-ray afterglow was determined:
RA(J2000) = 16h 07' 21.10"
Dec(J2000) = +32d 18' 56.3"
with an estimated uncertainty of 3.9 arcsec (90% containment). This is
72 arcsec from the BAT position reported by Bathelmy et al. (GCN 4795)
and 0.5 arcsec from the XRT position given Moretti et al. (GCN 4793).
The light-curve shows a single power decay of 0.65 +/- 0.20 from the
beginning of the observation (120 s after the trigger) up to 25 ks.
The spectrum can be fitted with a power-law of photon index Gamma = 2.1
+/- 0.2, assuming a Galactic column of 2.4E+20 cm^-2; there is no evidence
for excess NH in these data.
Assuming the current decay slope of 0.65 continues, and using the spectral
fit to the first orbit of data, the XRT count rate is predicted to be
0.006 counts/s at 24 hours, corresponding to an observed flux of 3.0e-13
erg cm^-2 s^-1.
This circular is an official product of the Swift-XRT Team.
GCN Circular 4795
Subject
GRB 060219: Partial refined analysis of the Swift-BAT burst
Date
2006-02-20T05:49:32Z (20 years ago)
From
Scott Barthelmy at NASA/GSFC <Scott@lheamail.gsfc.nasa.gov>
S. Barthelmy (GSFC), L. Barbier (GSFC), J. Cummings (GSFC/NRC),
E. Fenimore (LANL), N. Gehrels (GSFC), D. Hullinger (GSFC/UMD),
H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), A. Moretti (OAB/INAF),
D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/NRC),
G. Sato (ISAS), J. Tueller (GSFC)
on behalf of the Swift-BAT team:
Using the partial data set from T-60 to T+123 sec from recent telemetry
downlinks, we report further analysis of BAT GRB 060219 (trigger #191512)
(Moretti, et al., GCN 4788). The BAT ground-calculated position is
RA,Dec = 241.815,+32.310 deg {16h 07m 15.5s,+32d 18' 37.7"} (J2000)
+- 2.5 arcmin, (radius, sys+stat, 90% containment). The partial coding is 67%.
Using this partial data download, there is pre-trigger emission starting before T-60 sec.
After the trigger pulse from T+2 to T+10 sec, there is a weak 10-sec wide pulse
at T+50 sec, and then nothing out to the T+123 sec limit on the currently available data.
GCN Circular 4793
Subject
GRB 060219: Swift-XRT position typo correction
Date
2006-02-20T03:44:56Z (20 years ago)
From
Alberto Moretti at Obs Brera Merate <moretti@merate.mi.astro.it>
A. Moretti (INAF-OAB), report on behalf of the Swift XRT
team:
The XRT position of the afterglow of GRB 060219 reported in
Moretti et al. (GCN 4791) has a typo; the correct position is
RA(J2000) = 16h 07m 21.08s
Dec(J2000) = 32d 18m 55.9s
We estimate an uncertainty of 6.7 arcseconds radius (90% containment).
This position is 1.74 arcminutes from the BAT position given in GCN
4788.
GCN Circular 4791
Subject
GRB 060219: Swift-XRT position
Date
2006-02-20T03:20:07Z (20 years ago)
From
Alberto Moretti at Obs Brera Merate <moretti@merate.mi.astro.it>
A. Moretti (INAF-OAB), D. Burrows (PSU) report on behalf of the Swift XRT
team:
We have analysed the Swift XRT data from the first orbit observation of
GRB 060219 (Moretti et al. GCN 4788). We find an uncatalogued
source at the following location:
RA(J2000) = 16h 07m 21.08s
Dec(J2000) = 32d 19m 55.9s
We estimate an uncertainty of 6.7 arcseconds radius (90% containment).
This position is 1.74 arcminutes from the BAT position given in GCN
4788.
This circular is an official product of the Swift XRT Team.
GCN Circular 4789
Subject
GRB060219: SDSS pre-burst observations
Date
2006-02-20T00:05:45Z (20 years ago)
From
Richard J. Cool at U.of AZ/Steward Obs <rcool@as.arizona.edu>
Richard J. Cool (Arizona), Daniel J. Eisenstein (Arizona),
David W. Hogg (NYU), Michael R. Blanton (NYU), David
J. Schlegel (LBNL), J. Brinkmann (APO), Donald P. Schneider
(PSU), and Daniel E. Vanden Berk (PSU) report:
The Sloan Digital Sky Survey (SDSS) imaged the field of
burst GRB060219 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/GRB060219
We supply FITS images in each of the 5 SDSS bands of a
8'x8' region centered on the GRB position (ra=241.806
(16:07:13.4), dec=32.3300 (32:19:48.0) GCN 4788),
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 GRB060219_sdss.calstar.dat, we report
photometry and astrometry of 520 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 GRB060219_sdss.objects_flux.dat and
GRB060219_sdss.objects_magnitudes.dat, we report photometry
of 1487 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 GRB060219_sdss.objects_flux.dat
are in nanomaggies while the magnitudes listed in
GRB060219_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=0.172 mag, A_g=0.126 mag, A_r =
0.092 mag, A_i=0.069 mag, and A_z=0.049 mag.
The file GRB060219_sdss.spectro.dat contains a list of
the 2 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 4788
Subject
GRB 060219: Swift-BAT detection of a weak burst
Date
2006-02-19T23:14:53Z (20 years ago)
From
Scott Barthelmy at NASA/GSFC <Scott@lheamail.gsfc.nasa.gov>
A. Moretti (OAB/INAF), S. Barthelmy (GSFC), D. Burrows (PSU),
J. Cummings (GSFC/ORAU), N. Gehrels (GSFC), S. Hunsberger (PSU),
C. Markwardt (GSFC/UMD), F. Marshall (GSFC), D. Palmer (LANL),
T. Sakamoto (GSFC/ORAU)
on behalf of the Swift team:
At 22:48:05 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 060219 (trigger=191512). Swift slewed immediately to the burst.
The BAT on-board calculated location is RA,Dec 241.806,+32.330 deg
{16h 07m 14s, +32d 19' 49"} (J2000) with an uncertainty of 3 arcmin
(radius, 90% containment, including systematic uncertainty). The BAT
light curve shows a weak single peak with a duration of ~10 sec.
The peak count rate was ~500 counts/sec (15-350 keV), at ~5 sec
after the trigger.
The XRT began taking data at 22:50:05 UT, 120 seconds after the BAT trigger.
The XRT on-board centroid algorithm did not find a source in the image and
no prompt position is available. The prompt spectrum and lightcurve
are consistent with a weak, possibly fading source in the field of view.
We are waiting for down-linked data to detect and determine a position
for the source.
UVOT took a finding chart exposure of 200 seconds with the V filter starting
121 seconds after the BAT trigger. No afterglow candidate has been found
in the initial data products. The 2.7'x2.7' sub-image covers 25% of the
BAT error circle. The typical 3-sigma upper limit has been about 18th mag.
The 8'x8' region for the list of sources generated on-board covers 100%
of the BAT error circle. The list of sources is typically complete
to about 18.0 mag. No correction has been made for the expected extinction
of about 0.1 magnitudes.