GRB 060719
GCN Circular 5339
Subject
GRB 060719: Swift detection of a burst
Date
2006-07-19T07:11:32Z (19 years ago)
From
Scott Barthelmy at NASA/GSFC <scott@lheamail.gsfc.nasa.gov>
M. Stamatikos (NASA/ORAU), S. D. Barthelmy (GSFC), M. Capalbi (ASDC),
J. R. Cummings (NASA/UMD), C. Gronwall (PSU),
C. Guidorzi (Univ Bicocca&INAF-OAB), K. M. McLean (LANL/UTD),
K. L. Page (U Leicester), D. M. Palmer (LANL) and M. Perri (ASDC)
report on behalf of the Swift Team:
At 06:50:36 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 060719 (trigger=220020). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA,Dec 18.456, -48.375 {01h 13m 49s, -48d 22' 30"} (J2000)
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve shows two peaks, the first
starting at T_zero for ~4 sec and the second starting at T+40 for ~15 sec.
The peak count rate is 3000 counts/sec (15-350 keV) at ~T+1 sec.
The XRT began observing the field at 06:51:53 UT, 77 seconds after the
BAT trigger. XRT found a bright, variable, uncatalogued X-ray source
located at RA(J2000) = 01h 13m 43.3s, Dec(J2000) = -48d 22' 53.5", with an
estimated uncertainty of 4.0 arcseconds (90% confidence radius).
This location is 64 arcseconds from the BAT on-board position, within
the BAT error circle. The initial flux in the 2.5s image was
2.7e-09 erg/cm2/s (0.2-10 keV).
UVOT took a finding chart exposure of 100 seconds with the White
(160-650 nm) filter starting 90 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 and 100% of
the ground-determined XRT error circle. The typical 3-sigma upper
limit has been about 18.5 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 mag. No correction
has been made for extinction.
GCN Circular 5340
Subject
GRB 060719: LCO optical observations
Date
2006-07-19T07:40:30Z (19 years ago)
From
Edo Berger at Carnegie Obs <eberger@ociw.edu>
E. Berger (OCIW) and A. Bonanos (CIW) report:
"We observed the field of GRB 060719 starting on 2006 July 19 at 07:10:45
UT (20 min after the burst) with the 40-inch telescope at Las Campanas
Observatory. In a 300 sec R-band exposure we find a faint object close to
the limit of DSS within the XRT error circle at (J2000):
RA = 01:13:43.38
DEC= -48:22:55.1
Further observations are underway to determine whether this source is
variable."
GCN Circular 5341
Subject
GRB 060719: VLT observations
Date
2006-07-19T07:58:26Z (19 years ago)
From
Stefano Covino at Brera Astronomical Observatory <stefano.covino@brera.inaf.it>
S. Covino, G. Tagliaferri, D. Malesani, C. Guidorzi, D. Fugazza, E. Mason on
behalf of the MISTICI collaboration report:
We are observing the field of GRB 060719 with VLT+FORS2. The object
reported in GCN 5340 (Berger and Bonanos) is clearly visible.
However, the same object is also well visible in the DSS frame
(version I) while it is barely detectable in the DSS frame (version II).
Further observations are ongoing to determine its possible variability.
This message may be quoted.
[GCN OPS NOTE(19jul06): Per author's request, Malesani was added to the author list.]
GCN Circular 5342
Subject
GRB 060719: Continued LCO optical observations
Date
2006-07-19T08:16:38Z (19 years ago)
From
Edo Berger at Carnegie Obs <eberger@ociw.edu>
E. Berger (OCIW) and A. Bonanos (CIW) report:
"Additional imaging observations obtained with the LCO 40-inch telescope
on 07:16:50 UT (26 min) and 07:28:56 UT (38 min) indicate that the optical
candidate in GCN 5340 did not change in brightness by more than 0.2 mag.
This suggests a fading rate shallower than t^-0.5 if it is the afterglow,
or that this object is the host galaxy or altogether unrelated to the
GRB."
GCN Circular 5343
Subject
GRB060719: REM NIR Observations
Date
2006-07-19T08:23:38Z (19 years ago)
From
Angelo Antonelli at Obs. Astro. di Roma <a.antonelli@mporzio.astro.it>
L.A. Antonelli, S. Covino, D. Fugazza, E. Molinari, G. Chincarini,
F.M. Zerbi, V. Testa, G. Tosti, F. Vitali, P. Conconi, G. Cutispoto,
G. Malaspina, L. Nicastro, E. Palazzi, E. Meurs, and P. Goldoni
report on behalf of the REM/ROSS team:
The field of GRB 060719 (Stamatikos et al. GCN 5339) has been
observed by the robotic 60-cm REM telescope located at La Silla (Chile).
A set of observations was performed automatically in the near infrared
(z', J, H, K) starting on July 19.2858 (about 75 s after the BAT
trigger).
No NIR sources are detected within the XRT error circle in all filters
down to the 2MASS limiting magnitude.
This message may be cited.
GCN Circular 5344
Subject
GRB 060719: prompt PROMPT observations
Date
2006-07-19T08:31:27Z (19 years ago)
From
Melissa Nysewander at UNC,Chapel Hill <mnysewan@physics.unc.edu>
M. Nysewander, D. Reichart, K. Ivarsen, A. Foster, A. LaCluyze, J. A.
Crain, C. MacLeod, J. Haislip, and A. Trotter report on behalf of the UNC
GRB Collaboration:
Under the control of SkyNet, 3 0.4-m PROMPT telescopes observed the
location of GRB 060719 (Stamatikos et al., GCN 5339) beginning 36 seconds
after the burst in Ur'i'z'.
We do not see evidence for an optical afterglow to z' > 16.6 mag (3 sigma,
10 sec exposure) at a mean time of 58 seconds after the burst and z' > 18.6
mag (3 sigma; 3 x 40 sec exposures) at a mean time of 5.4 min after the
burst. We do not detect any early brighter emission from the possible
candidate reported by Berger & Bonanos (GCN 5340).
PROMPT is currently being built and commissioned.
GCN Circular 5345
Subject
GRB060719: FRAM early follow-up limit
Date
2006-07-19T10:56:18Z (19 years ago)
Edited On
2024-11-18T09:54:32Z (7 months ago)
From
Martin Jelinek at Inst.Astrophys.Andalucia,Granada <mates@iaa.es>
Edited By
Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Leo P. Singer at NASA/GSFC <leo.p.singer@nasa.gov>
Martin Jelínek (IAA Granada, Spain),
Petr Kubánek (ISDC Versoix, Switzerland and ASU Ondrejov, Czech Rep.) and
Michael Prouza (Columbia University New York, USA and FZU Praha, Czech Rep.)
on behalf of the FRAM team, coordinated by FZU Praha, Czech Rep.
report
"Robotic telescope FRAM followed the Swift trigger #220020. 5x
20s R-band (lambda_eff = 640nm) images were obtained starting
112.4s after the GRB (99.5s after receiving the notification).
On the coadded frame with exposure mean time 180s after the GRB
we do not detect any new source down to the limiting magnitude
R=~16.2."
this message may be cited
GCN Circular 5346
Subject
GRB 060719: optical limit by Pi-of-the-Sky
Date
2006-07-19T12:58:45Z (19 years ago)
From
Grzegorz Wrochna at Soltan Inst.for Nuclear Studies <wrochna@fuw.edu.pl>
M.Biskup, M.Cwiok, W.Dominik, J.Falzmann, G.Kasprowicz, A.Majcher,
K.Malek, L.Mankiewicz, M.Molak, J.Mrowca-Ciulacz, K.Nawrocki,
L.W.Piotrowski, P.Sitek, M.Sokolowski, J.Uzycki, G.Wrochna,
on behalf of "Pi of the Sky" collaboration.
"Pi of the Sky" apparatus located at Las Campanas Observatory
has moved to the Swift-BAT trigger 220020 and it has taken a series
of 10s exposures starting 65s after the GRB (43s after the alert).
No new object has been found within the Swift-BAT error box.
The limiting magnitude is 12.5m (unfiltered) for single exposures
and 12.8m for the sum of 20 images.
More information at http://grb.fuw.edu.pl/pi/grb.htm
GCN Circular 5347
Subject
GRB 060719: further analysis of VLT observations
Date
2006-07-19T13:14:27Z (19 years ago)
From
Daniele Malesani at SISSA-ISAS,Trieste,Italy <malesani@sissa.it>
D. Fugazza (INAF/OABr), D. Malesani (SISSA/ISAS), S. Covino (INAF/OABr),
report on behalf of the MISTICI collaboration:
We refine the analysis of our observations of GRB 060719 (Stamatikos et
al., GCN 5339) taken at the ESO VLT (Covino et al., GCN 5341).
Observations were taken between Jul 19.301 and 19.332 UT, consisting of
fifty short exposures for a total exposure time of 25 minutes.
Inside the XRT error box, only the object reported by Berger & Bonanos
(GCNs 5340, 5342) is visible in our images. This object is present in
the DSS (Covino et al., GCN 5341).
A 30-minutes low-resolution spectrum identifies the object as a
foreground star, thanks to the identification of Balmer lines, CaII, SII
and NaD features in absorption at redshift 0.
There are two further objects very close to the XRT error circle
(equinox J2000):
1: alpha = 01:13:43.44, delta = -48:22:58.2
2: alpha = 01:13:43.68, delta = -38:22:51.3
These objects lie 5.2 and 4.4" arcsec away the XRT position,
respectively, and are both pointlike and fainter than the DSS limit.
Object 2 is very faint in our images.
All objects are constant within the errors during the course of our
observation (~23 to 68 minutes after the trigger). We estimate the
3-sigma limiting magnitude of our images to be R ~ 25.5 (based on
USNO-B1 R1 magnitudes).
We acknowledge the excellent support of the VLT staff, in particular
Elena Mason.
This message can be cited.
GCN Circular 5348
Subject
GRB 060719: XRT refined analysis
Date
2006-07-19T17:05:37Z (19 years ago)
From
Maria Laura Conciatore at ASDC <conciatore@asdc.asi.it>
M.L. Conciatore, M. Capalbi, M. Perri, L. Vetere (ASDC), D.N. Burrows
(PSU) and M. Stamatikos (NASA/ORAU) report on behalf of the Swift/XRT
team:
We have analyzed the first 5 orbits of XRT data from GRB 060719
(Stamatikos et al., GCN 5339). A 8.4 ks Photon Counting mode image
provides a refined XRT position:
RA(J2000) = 01h 13m 43.57s,
Dec(J2000) = -48d 22m 55.0s
with an uncertainty of 3.7 arcsec (90% containment). This position is 3.1
arcsec away from the preliminary XRT position reported in GCN 5339.
The X-ray light curve displays two flares during the first orbit at
about 130 seconds and 190 seconds after the BAT trigger. The afterglow
decay from T+300s to T+24ks can be fit with a broken power-law with an
initial decay slope of -0.2+/-0.1, a break at 6.9+/-1.7 ks, and a
post-break slope of -1.3+/-0.3.
A power-law fit to the 0.3-10 keV spectrum from T+86s to T+128s gives a
photon index of 3.0+/-0.4 and a column density of
(2.4+/-0.9)e21 cm**-2. We note the Galactic hydrogen column density
in the direction of the burst is 1.9e20cm**-2.
If the burst continues decaying at the current rate we estimate a
0.3-10 keV unabsorbed flux of ~4e-13 ergs cm**-2 s**-1 at T+24hr.
This circular is an official product of the Swift XRT Team.
GCN Circular 5349
Subject
GRB 060719: Refined analysis of the Swift-BAT burst
Date
2006-07-19T17:22:33Z (19 years ago)
From
Scott Barthelmy at NASA/GSFC <scott@lheamail.gsfc.nasa.gov>
T. Sakamoto (GSFC/ORAU), L. Barbier (GSFC), S. D. Barthelmy (GSFC),
J. Cummings (GSFC/ORAU), E. Fenimore (LANL), N. Gehrels (GSFC),
D. Hullinger (BYU-Idaho), H. Krimm (GSFC/USRA), M. Koss (GSFC/UMD),
C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC),
G. Sato (GSFC/ISAS), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC)
on behalf of the Swift-BAT team:
Using the data set from T-119 to T+183 sec from recent telemetry downlinks,
we report further analysis of BAT GRB 060719 (trigger #220020)
(Stamatikos, et al., GCN Circ. 5339). The BAT ground-calculated position
is RA,Dec = 18.418, -48.383 deg {01h 13m 40.3s, -48d 22' 58.3"} (J2000)
+- 1.3 arcmin, (radius, sys+stat, 90% containment). The partial coding was 70%.
The mask-tagged lightcurve shows two peaks. The first is FRED-like and
starts at T-1 and ends at T+5 sec. The second is more symmetric and
starts at T+41 sec and ends at T+55 sec. T90 (15-350 keV) is 55 +- 5 sec
(estimated error including systematics).
The time-averaged spectrum from T-0.2 to T+84.6 is best fit by a simple
power-law model. The power law index of the time-averaged spectrum
is 2.00 +- 0.11. The fluence in the 15-150 keV band is
1.6 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured
from T+0.59 sec in the 15-150 keV band is 2.3 +- 0.2 ph/cm2/sec.
All the quoted errors are at the 90% confidence level.
GCN Circular 5350
Subject
GRB 060719: VLT/ISAAC observations
Date
2006-07-19T18:14:51Z (19 years ago)
From
Daniele Malesani at SISSA-ISAS,Trieste,Italy <malesani@sissa.it>
D. Malesani (SISSA/ISAS), P. Jakobsson (U. Hertfordshire), J. Fynbo, M.
Stritzinger (DARK, NBI), and S. Covino (INAF/OABr), report:
We observed the field of GRB 060719 (Stanatikos et al., GCN 5339) with
the ESO VLT + ISAAC, starting on 2006 Jul 19.4237 UT (3.3 hr after the
trigger). Images in the Js, H and Ks filters were acquired.
The three objects close to the XRT position reported by Berger & Bonanos
(GCN 5340) and Fugazza et al. (GCN 5347) are detected in our images. We
note that object #1 of Fugazza et al. (GCN 5347) is significantly
outside the revised XRT position (Conciatore et al., GCN 5348), while
object #2 is still at the border of the 90% error circle.
Object #2 is very red, as observed in KHJ images: it is well detected in
Ks and barely visible in J. Compared with the R-band measurement (which,
we caution, was taken at a significantly earlier epoch; GCN 5347), it
has a color R-K ~ 4.5 +- 0.2. At this stage, we cannot assess, however,
whether this object is related to the GRB.
A finding chart is posted at the following URL:
http://www.sissa.it/~malesani/GRB/060719
We acknowledge support from the observing staff in Paranal.
GCN Circular 5351
Subject
GRB 060719: Swift/UVOT Upper Limits
Date
2006-07-19T20:35:05Z (19 years ago)
From
Adam Morgan at PSU/Swift-UVOT <qmorgan@gmail.com>
A. Morgan, P. Brown (PSU), M. Stamatikos (GSFC/ORAU) on
behalf of the Swift/UVOT team:
The Swift UVOT began taking data on the field of GRB
060719 67 s after the BAT trigger (Stamatikos et al.,
GCN 5339). No new source, relative to the DSS, is seen
inside the refined XRT error circle (Conciatore et al.,
GCN 5348). The 3-sigma upper limits for the first finding
charts and the coadded images are listed below.
Finding charts:
Filter Midpoint (s) Exposure (s) 3-sigma UL
White 137 100 19.84
V 392 400 19.21
Coadded images:
Filter T_range(s) EXPOSURE (s) 3-sigma UL
White 87-17818 2240 21.68
V 67-22697 2117 20.27
B 669-16906 1298 21.15
U 646-6461 432 19.88
UVW1 622-24096 912 20.52
UVM2 598-23601 1279 21.15
UVW2 699-18307 1558 21.18
T_range is calculated from the time of the burst. These
upper limits have not been corrected for the estimated
Galactic reddening of E_{B-V} = 0.066 mag (Schlegel et
al. 1998).
GCN Circular 5353
Subject
GRB 060719: correction to the coordinates reported in GCN 5347
Date
2006-07-20T10:27:28Z (19 years ago)
From
Daniele Malesani at SISSA-ISAS,Trieste,Italy <malesani@sissa.it>
D. Malesani reports:
It was noted an error in the coordinates of object #1 listed in GCN
5347. The right ascension should be 01:13:43.08 rather than 01:13:43.44.
To summarize, the correct coordinates of the two objects are (J2000):
1: alpha = 01:13:43.08, delta = -48:22:58.2
2: alpha = 01:13:43.68, delta = -48:22:51.3
The error is 0.3". The finding charts presented in GCN 5350 and posted
at the URL http://www.sissa.it/~malesani/GRB/060719 are correct.
I apologize for any confusion this may have created, and thank Matteo
Perri for pointing out this mistake.
[GCN OPS NOTE(20jul06): Per author's request, the Subject-line was changed
from "060917" to "060719".]
GCN Circular 5354
Subject
GRB 060719: near-infrared afterglow
Date
2006-07-21T09:54:22Z (19 years ago)
From
Daniele Malesani at SISSA-ISAS,Trieste,Italy <malesani@sissa.it>
D. Malesani (SISSA/ISAS), J. Fynbo (NBI-DARK), P. D'Avanzo (INAF-OABr),
S. Covino (INAF-OABr), D. Fugazza (INAF-OABr), P. Jakobsson (Univ.
Hertfordshire), P.M. Vreeswijk (ESO), report:
We observed again the field of GRB 060719 (Stamatikos et al., GCN 5339;
Conciatore et al., GCN 5348) with the ESO VLT equipped with the ISAAC
instrument. Observations were carried out in the Ks filter, with mean
time Jul 20.41 (1.13 days after the GRB).
With respect to a previous observation (Malesani et al., GCN 5350), we
observe significant fading of object #2 (Fugazza et al., GCN 5347). This
object is thus the optical/NIR afterglow of GRB 060719. The observed
fading, by 2.0 +- 0.2 mag, corresponds to a power-law decay slope alpha
= 0.9 +- 0.1.
We acknowledge excellent support from the ESO staff, and in particular
Daniel Kubas.
This message may be cited.
GCN Circular 5356
Subject
GRB060719: prompt NIR observations with REM
Date
2006-07-21T14:33:13Z (19 years ago)
From
Angelo Antonelli at Obs. Astro. di Roma <a.antonelli@mporzio.astro.it>
L. Calzoletti, L.A. Antonelli, S. Covino, D. Fugazza, E. Molinari,
G. Chincarini, F.M. Zerbi, V. Testa, G. Tosti, F. Vitali, P. Conconi,
G. Cutispoto, G. Malaspina, L. Nicastro, E. Palazzi, E. Meurs, and
P. Goldoni report on behalf of the REM/ROSS team:
The 60cm robotic telescope REM (La Silla) observed automatically
the field of GRB060719 starting observations on July 19.2858,
i.e. 42 s after receiving the alert and 64 s after the BAT trigger
(Stamatikos et al. GCN 5339), and continued to observe the field
until July 19.350 UT. Preliminary results on the early observation
have been already reported in GCN 5343.
All frames acquired in the J and H filters were summed to obtain final
images in each filter for a total exposure time of 900s and 1200s
respectively. We do not detect the infrared afterglow candidate proposed
by Malesani et al. (GCN 5354). We derived the 3-sigma upper limits of
J >18.2 and H >17.8, obtained on the first 450s images.
This message may be cited.
GCN Circular 5372
Subject
GRB 060719: TORTOREM optical upper limits
Date
2006-07-30T08:29:57Z (19 years ago)
From
Corrado Bartolini at Universita di Bologna <corrado.bartolini@unibo.it>
A. Guarnieri, C. Bartolini, G. Beskin, S. Bondar, G. Greco, S. Karpov,
D. Nanni, A. Piccioni, F. Terra, E. Molinari, G. Chincarini, F. M. Zerbi,
S. Covino, V. Testa, G. Tosti, F. Vitali, L. A. Antonelli, P. Conconi,
G. Cutispoto, G. Malaspina, L. Nicastro, E. Palazzi, E. Meurs, P. Goldoni,
on behalf of the TORTOREM Team report:
The field of GRB 060719 (Stamatikos et al. GCN 5339) was observed
by the TORTORA (Telescopio Ottimizzato per la Ricerca di Transienti
Ottici RApidi) wide-field fast camera (12 cm diameter, 20x25 deg FOV)
mounted on REM robotic 60-cm telescope located at La Silla (Chile).
The burst was outside the camera field of view. The system was repointed
and the TORTORA began to acquire frames at 06:51:36 UTC (59 sec after trigger)
with 7.5 Hz frame frequency (0.128 exposure).
The summation of 100 frames with 12.8 s. effective exposure did not reveal
any source down to the B = 12.4 mag (3-sigma).
We performed the Fourier analysis of 15 min data set to search for the
periodic signal at the GRB position.
The upper limit for the amplitude of sinusoidal variability is
B=16.5 (1-sigma) over the 0.01 - 3.5 Hz range.
The message may be cited.
GCN Circular 5466
Subject
Radio observations of GRB 060719
Date
2006-08-18T20:55:45Z (19 years ago)
From
Dale A. Frail at NRAO <dfrail@nrao.edu>
Mark H. Wieringa (Australia Telescope National Facility), Poonam
Chandra (UVA/NRAO), and Dale A. Frail (NRAO) report on behalf
of a larger collaboration:
"We observed a region centered on the Swift burst GRB 060719 (GCN 5339)
using the Australia Telescope Compact Array starting at UT 16:22 July
30 and ending at 00:51 July 31. No emission was seen at a frequency of
8.7 GHz within the XRT error circle. The 3-sigma detection limits are
0.18 mJy and the beam size was 1.9"x0.5"."
The Australia Telescope Compact Array is part of the Australia
Telescope which is funded by the Commonwealth of Australia for
operation as a National Facility managed by CSIRO.