GRB 020819
GCN Circular 1859
Subject
GRB020819: Kiso R and I band observations
Date
2003-02-05T15:27:17Z (23 years ago)
From
Yuji Urata at RIKEN <urata@crab.riken.go.jp>
Y. Urata, K. Tarusawa, T. Soyano on behalf of the Kiso GRB team:
"We have observed the field of GRB020819 with the KISO observatory
1.05m schmidt telescope starting at Aug 19.747 UT (2.9 hour after the
burst). We obtained R and I band data with 300 sec x 4 frames and
three 300 sec x 3 frames respectively.
We could not identify any stellar object at the position of radio
afterglow (RA) reported by Frail & Berger (GCN 1842). The R band
limiting magnitude is 18.9 mag. It was estimated by comparison with
field photometry ( Dr. Levan ; private communication). For I band
data, because there are no field photometry, we can not estimate the
limiting magnitude.
Following the DSS-II red image (Plate ID = A0J7), we found that a
faint object is located at near the RA position. The coordinate is
RA=23:27.20 DEC=+06:15:53 measured by using WCS of the image.
We thank to Dr. Levan for R band field photometry."
This message may be cited.
GCN Circular 1844
Subject
GRB 020819: Host galaxy at Radio Position
Date
2003-02-02T01:04:47Z (23 years ago)
From
Andrew Levan at U.of Leicester <anl@star.le.ac.uk>
Andrew Levan (U. Leicester/STScI), Andrew Fruchter, James Rhoads and
Ingunn Burud (STScI), Evert Rol, Isabel Salamanca, Lex Kaper (U.
Amsterdam) and Nial Tanvir (U. Hertfordshire) report for a larger
collaboration:
We have re-examined R-band images of the field of GRB 020819 taken with
the JKT on Aug 19th 2002 and with CTIO-4m on Sept 9th 2002. Coincident
with the radio position reported by Frail & Berger (GCN 1842) we find a
clearly resolved galaxy with R~19.8.
A PSF matched image subtraction reveals no evidence of fading between
19th Aug. and 9th Sept. Thus any optical transient had R>22 at the time
of the JKT observations (9 hours after burst).
If this galaxy is indeed the host of GRB 020819 then it is the brightest
GRB host galaxy yet observed (with the exception of the host of GRB
980425/SN1998bw). It may therefore be at very low redshift. Alternatively
the unusual properties of the burst may be related to an unusual host
environment.
GCN Circular 1842
Subject
GRB 020819: afterglow candidate
Date
2003-02-01T00:07:15Z (23 years ago)
From
Dale A. Frail at NRAO <dfrail@nrao.edu>
D. A. Frail (NRAO), and E. Berger (Caltech) report on behalf of a
larger collaboration:
"We have continued to monitor the HETE burst GRB020819 with the VLA at
8.46 GHz. Two radio sources were identified within the initial
130-arcsec error circle of the SXC (GCN1508). The first source has
remained constant (within the radiometric errors) at about 380 uJy.
The second source has declined from a peak of 315 uJy on 2002 August
21.37 UT and is currently undetectable (i.e. <35 uJy).
The variable source, located at r.a.=23:27:19.475, dec.=06:15:55.95
(epoch J2000) with conservative errors of +/-0.5 arcsec, is 98-arcsec
away from the center of the revised SXC 64-arcsec error circle
(GCN1526). From previous radio afterglow searches we note that the
probability of detecting such extreme variability from non-GRBs is
rare (<2% probability over the area surveyed). We request observers to
re-examine this position for an optical afterglow.
The entire radio dataset can be found at:
http://www.aoc.nrao.edu/~dfrail/grb_public.shtml
An 8.46 GHz light curve is at
http://www.aoc.nrao.edu/~dfrail/g020819_lcx.ps
This message may be quoted."
GCN Circular 1526
Subject
GRB020819(=H2275): Revised Localization with HETE Soft X-ray
Date
2002-08-27T21:49:14Z (23 years ago)
From
George Ricker at MIT <grr@space.mit.edu>
GRB020819(=H2275): Revised Localization with HETE Soft X-ray Camera (SXC)
G. Crew, J.G. Jernigan, R. Vanderspek, J. Villasenor, G. Monnelly, J.
Doty, N. Butler, T. Cline, A. Levine, F. Martel, E. Morgan, G.
Prigozhin, G. Azzibrouck, J. Braga, R. Manchanda, and G. Pizzichini,
on behalf of the HETE Optical-SXC and HETE Operations Teams;
G. Ricker, J-L Atteia, N. Kawai, D. Lamb, and S. Woosley on behalf of
the HETE Science Team;
C. Graziani, Y. Shirasaki, M. Matsuoka, T. Tamagawa, K. Torii, T.
Sakamoto, A. Yoshida, E. Fenimore, M. Galassi, T. Tavenner, and T.
Donaghy, on behalf of the HETE WXM Team;
M. Boer, J-F Olive, J-P Dezalay, and K. Hurley on behalf of the HETE
FREGATE Team;
write:
Analysis of the full data set derived from the HETE Soft X-ray Camera
(SXC) has resulted in a revised location for GRB020819(=H2275;
Vanderspek et al, GCN Circular #1508). The revised SXC location can
be expressed as a 90% confidence circle that is 64" in radius and is
centered at:
RA = 23h 27m 25.1s, Dec = +6o 16' 46" (J2000)
This revised SXC localization lies fully within the original 130"
radius SXC error circle reported by Vanderspek et al in GCN1508, as
well as fully within the annulus for the IPN location reported by
Hurley et al in GCN1507.
Further information regarding GRB020819 is provided at the following URL:
http://space.mit.edu/HETE/Bursts/
This message is citable.
GCN Circular 1523
Subject
GRB020819: optical observations at Bisei
Date
2002-08-26T09:00:44Z (23 years ago)
From
Yuji Urata at RIKEN <urata@crab.riken.go.jp>
T. Kawabata (BAO), Y. Urata (Titech / RIKEN) report:
We have obtained the R band images of the entire HETE-2 SXC error circle
of GRB020819 (Vanderspek et al., GCN #1508) with the Bisei Astronomical
Observatory (BAO) 1.01-m telescope starting at Aug. 19 18:34 UT (3.6 hrs
after the burst). The limiting magnitude of a combined image of 35
frames (FOV 7.8'x5.2', each exposure time 90 seconds) is R~20.6 (3 sigma,
compared with USNO-A2.0 red magnitudes). We could not find a new object
in the error circle by the comparison with DSS II red image.
This message may be cited.
GCN Circular 1520
Subject
Second epoch K band imaging of GRB 020819
Date
2002-08-23T09:03:18Z (23 years ago)
From
Jochen Greiner at MPI <jcg@mpe.mpg.de>
S. Klose (Thueringer Landessternwarte Tautenburg),
A. Henden (USRA/USNO),
J. Greiner (MPE Garching),
D. H. Hartmann (Clemson University),
N. Cardiel, J. Gallego (Universidad Complutense de Madrid), and
U. Thiele (Calar Alto Observatory)
report:
A deep second epoch K' band observation of the 130 arcsec radius error
circle of the HETE burst GRB 020819 (HETE trigger #2275, Seq_4;
Vanderspek et al. 2002, GCN #1508) has been performed on August 20/21,
23:11--00:59 UT (about 33 hrs after the GRB), using the Calar Alto
3.5-m telescope equipped with the Omega Prime near-infrared camera.
The integration time was 77 min. The limiting magnitude is about
K'=20.5 (+/-0.5), the seeing was 1.2 arcsec.
Lacking a K band photometric calibration, we used the (B-R) colors of all
USNO stars (Monet et al. 1996; http://asteroid.lowell.edu/cgi-bin/koehn/webnet)
in the field for a rough calibration. Assuming their colors are
representative for their spectral type and assuming zero interstellar
extinction, the magnitude of the candidate object reported in GCN #1510
(Henden et al. 2002) is found to have K'=17.6 (conservative error of 0.2 mag).
Photometry of all objects within the HETE/SXC error circle using PSF fitting
(Sextractor) did not reveal any source brighter than K'=19 which faded by
more than 0.1 mag between the first epoch (Henden et al. 2002, GCN #1510)
and this second epoch observation. This and the findings of Price et al.
2002 (GCN #1511) and Salamanca et al. 2002 (GCN #1512) imply that the
candidate object proposed earlier (Henden et al. 2002, GCN #1510) is very
unlikely the GRB afterglow.
GCN Circular 1516
Subject
GRB020819 : Optical observations at KISO
Date
2002-08-21T14:16:00Z (23 years ago)
From
Yuji Urata at RIKEN <urata@crab.riken.go.jp>
Y. Urata, K. Tarusawa, T. Soyano
on behalf of the KISO GRB Team report:
"We have observed the entire HETE-2 SXC error circle of GRB020819
(Vanderspek et al., GCN1508) with the KISO observatory 1.05m schmidt
telescope starting at Aug 19.747 UT. A combined image of all
exposures (3x300sec) gives limiting magnitude of R ~ 19 mag using r
magnitudes of near USNO_A2.0 stars as photometric
references. Comparison with DSS II red images, no new object was
detected down to the limiting magnitude. Also, the candidate reported
by Henden et al. (GCN1510) was not detected."
This message may be cited.
GCN Circular 1512
Subject
GRB 020819 : OT candidate - confirmation of non variability
Date
2002-08-20T17:40:37Z (23 years ago)
From
Isabel Salamanca at U. of Amsterdam <isabel@science.uva.nl>
Evert Rol, Isabel Salamanca (University of Amsterdam, Netherlands),
Maureen van den Berg, Jeroen Homan (Osservatorio Astronomico di Brera,
Itlay), Lex Kaper (UvA, NL), Nial Tanvir (University of Hertfordshire,
UK) Andrew Levan and Ingunn Burud (STScI, US) on behalf of a larger
collaboration, report:
We have observed the error box of GRB 020819 with the CCD camera in
the JKT at La Palma on August 19/20. The filter was R Harris. We
obtained three sets of exposures at the beginning (2250 sec), middle
(3000 sec) and end (2250 sec) of the night. The limiting magnitude is
about R~22 for the first epoch.
We detect the OT candidate reported by Henden et al (GCN 1510) at
magnitude R ~ 21, but it does not fade from the beginning (UT ~ 23.814
hours) to the end (UT ~ 5.365 hours) of the night.
--
Dr. Isabel E. de Salamanca
Anton Pannekoek Institute, UvA
Amsterdam - The Netherlands.
GCN Circular 1511
Subject
GRB 020819: Optical observations
Date
2002-08-20T16:01:13Z (23 years ago)
From
Paul Price at RSAA, ANU <pap@mso.anu.edu.au>
P.A. Price (RSAA, ANU), D.W. Fox (Caltech), A. Piccioni, C. Bartolini,
I. Bruni, R. Gualandi., A. Guarnieri (Bologna University and Bologna
Astronomical Observatory), G. Pizzichini (IASF-CNR, Sezione di Bologna)
and R. McNaught (RSAA, ANU) report:
We observed the SXC error-circle of GRB 020819 (GCN #1508) with the
Palomar 60-inch telescope at Aug 20.34 UT with 4x600 sec exposures in R.
Comparison of this combined image with those from the SSO 40-inch
telescope (GCN #1506) and the Loiano 1.5-metre telescope (GCN #1509),
both visually and through image subtraction do not reveal any afterglow
candidates. We estimate the limiting magnitudes to be as follows:
SSO 40-inch R ~ 20.5 mag (GCN #1506)
Loiano 1.5-metre R ~ 21.7 mag (GCN #1509)
Palomar 60-inch R ~ 21.5 mag
Comparison of the best NIR afterglow candidate (GCN #1510) with other
sources in the field suggests that this candidate is likely constant in
flux.
This message may be cited.
GCN Circular 1510
Subject
K band observation of GRB 020819
Date
2002-08-20T08:56:52Z (23 years ago)
From
Jochen Greiner at MPI <jcg@mpe.mpg.de>
A. Henden (USRA/USNO),
J. Greiner (MPE Garching),
S. Klose (Thueringer Landessternwarte Tautenburg),
N. Cardiel, J. Gallego, U. Thiele (Calar Alto Observatory),
D. H. Hartmann (Clemson University),
F. J. Vrba (USNO),
A.J. Castro-Tirado (LAEFF-INTA Madrid and IAA-CSIC Granada),
E. Pian (INAF, Astr. Obs. Trieste), and
G. Tovmassian (OAN Ensenada, Mexico)
report on behalf of the GRACE collaboration:
The 130 arcsec radius error circle of the HETE burst GRB 020819 (HETE
trigger #2275, Seq_4; Vanderspek et al. GCN #1508) was imaged in the
K' band on August 19/20, 23:12 UT - 0:33 UT (about 9 hrs after the
burst), using the Calar Alto 3.5-m telescope equipped with the Omega
Prime near-infrared camera (1k x 1k; FOV 6.8 x 6.8 arcmin). The
integration time was 63 min. The limiting magnitude is about K'=20
(+/-0.5), the seeing was about 1.5 arcsec.
Based on a visual comparison with the corresponding DSS2 red image we
find a best afterglow candidate at coordinates
RA, DEC (J2000) = 23:27:31.5, 6:14:59, +/- 1 arcsec.
This source is relatively bright in K' (we can only provide a very
rough estimate at the moment; K' = 17.5 +/- 1) but has no counterpart on
the DSS 2 red image. We stress that we cannot yet rule out that this a
red foreground star. Naturally, there are several more, progressively
fainter, objects that are also potential candidates.
Further NIR observations are needed in order to search for a fading
behaviour.
GCN Circular 1509
Subject
GRB020819: optical observations
Date
2002-08-20T01:34:05Z (23 years ago)
From
Adalberto Piccioni at Astronomy, Bologna U. <piccioni@ermione.bo.astro.it>
A. Piccioni, C. Bartolini, I. Bruni, R. Gualandi., A. Guarnieri
(Bologna University and Bologna Astronomical Observatory), and
G. Pizzichini (IASF-CNR, Sezione di Bologna) report:
On 2002 August 19, 22h16m17s UT we started observations of the
error box of GRB 020819 (GCN 1506, 1507, 1508) with the 152 cm telescope
in Loiano. The acquisition sequence was: R band, 1x600 + 3x900 sec
exposures; V band, 1x900 sec; I band, 1x900 sec; B band, 1x1200
sec; R band, 3x900 sec.
By visual inspection in our R frames there is no new object
brighter than the limit of DssII, in accordance with Price P.A.
and McNaught R.
Image reductions and further observations are in progress.
Our images can be retrieved by sftp at 'ermione.bo.astro.it',
username 'publicGRB', password 'GRB_bo', starting on August 21.
This message may be cited.
[GCN OPS NOTE (24aug02): The reference "(GCN 1468)" was corrected to
"(GCN 1506, 1507, 1508)".]
GCN Circular 1508
Subject
GRB020819(=H2275): A Long Burst Localized by the HETE WXM and SXC
Date
2002-08-19T22:50:50Z (23 years ago)
From
George Ricker at MIT <grr@space.mit.edu>
GRB020819(=H2275): A Long Burst Localized by the HETE WXM and SXC
R. Vanderspek, J. Villasenor, J.G. Jernigan, G. Monnelly, J. Doty, G.
Crew, N. Butler, T. Cline, A. Levine, F. Martel, E. Morgan, G.
Prigozhin, G. Azzibrouck, J. Braga, R. Manchanda, and G. Pizzichini,
on behalf of the HETE Optical-SXC and HETE Operations Teams;
G. Ricker, J-L Atteia, N. Kawai, D. Lamb, and S. Woosley on behalf of
the HETE Science Team;
Y. Shirasaki, C. Graziani, M. Matsuoka, T. Tamagawa, K. Torii, T.
Sakamoto, A. Yoshida, E. Fenimore, M. Galassi, T. Tavenner, and T.
Donaghy, on behalf of the HETE WXM Team;
M. Boer, J-F Olive, J-P Dezalay, and K. Hurley on behalf of the HETE
FREGATE Team;
write:
At 14:57:35.82 UTC (53855.82 s UT) on 19 Aug 2002, the HETE FREGATE,
WXM, and SXC instruments detected event H2275, a moderately bright,
long GRB. In the FREGATE 8-40 keV band, the burst had a duration of
~20 seconds, and a peak brightness of ~5x Crab. A GCN Burst Alert
Notice was disseminated 55s after the burst. No real-time optical
camera aspect was generated at the time of the burst; thus, no WXM
real-time localization could be disseminated. Ground analysis of the
optical camera data, and of the WXM data for the burst, produced a
refined location which was reported in a GCN Position Notice issued
98 minutes after the burst. The WXM location can be expressed as a
90% confidence circle that is 7 arcminutes in radius and is centered
at
WXM: RA = 23h 27m 07s, Dec = +6o 21' 50" (J2000).
Ground analysis of the SXC data for the burst also produced a refined
location, which was reported in a GCN Position Notice issued 176
minutes after the burst. The SXC location can be expressed as a 90%
confidence circle that is 130 arcseconds in radius and is centered at
SXC: RA = 23h 27m 24s, Dec = +6o 16' 08" (J2000).
We note that the SXC error circle (reported at 17:54:08 UTC) lies
almost fully within the subsequently-reported IPN annulus (Hurley et
al, GCN1507, issued at 19:30:40 UTC). Also, the catalogued X-ray
source 1RXS J232705.9+062419 lies within the WXM error box, but is
not within the SXC error box.
Further information (including a light curve and the error boxes) for
GRB020819 is provided at the following URL:
http://space.mit.edu/HETE/Bursts/
This message is citable.
GCN Circular 1507
Subject
IPN triangulation of GRB020819 (HETE 2275)
Date
2002-08-19T19:30:40Z (23 years ago)
From
Kevin Hurley at UCBerkeley/SSL <khurley@sunspot.ssl.berkeley.edu>
K. Hurley and T. Cline, on behalf of the Ulysses GRB team, and
G. Ricker, J-L Atteia, N. Kawai, D. Lamb, S. Woosley, J. Doty, R.
Vanderspek, J. Villasenor, G. Crew, G. Monnelly, N. Butler, J.G.
Jernigan, A. Levine, F. Martel, E. Morgan, G. Prigozhin, J. Braga, R.
Manchanda, G. Pizzichini, Y. Shirasaki, C. Graziani, M. Matsuoka, T.
Tamagawa, K. Torii, T. Sakamoto, A. Yoshida, E. Fenimore, M. Galassi,
T. Tavenner, T. Donaghy, M. Boer, J-F Olive, and J-P Dezalay, on behalf
of the HETE GRB team, report:
Ulysses and HETE observed this burst (HETE 2275, 53855 s). As observed
by Ulysses, it had a duration of ~20 s, a 25-100 keV fluence of
~7.8E-06 erg/cm2, and a peak flux of ~7.0E-07 erg/cm2 s over 0.25
s.
We have triangulated it to a preliminary, 3 sigma annulus centered
at RA, Decl (2000)=345.048 o, -43.013 o, with radius 49.664 +/- 0.033
degrees. This annulus intersects the HETE WXM position (Sequence
4) at just two points, reducing its area only slightly:
RA DEC
23 h 27 m 29.39 s 6 o 17' 47.58"
23 h 27 m 19.78 s 6 o 18' 3.95"
A map will be posted shortly at ssl.berkeley.edu/ipn3/020819.
This annulus may be improved; it may become an error box when
the Mars Odyssey data become available.