GRB 000615
GCN Circular 703
Subject
GRB000615: BeppoSAX GRB Alert
Date
2000-06-15T10:58:53Z (25 years ago)
From
Giangiacomo Gandolfi at IAS/CNR Frascati <gandolfi@ias.rm.cnr.it>
On June 15, 06:18:24 U.T. a GRB (GRB000615) has been detected
simultaneously by the GRBM and WFC aboard BeppoSAX.
Preliminary coordinates from WFC are:
R.A.(2000)= 233.141
DEC(2000)= +73.795
The error radius at this stage of analysis is 5'.
A follow-up observation with the NFI is being planned
Luigi Piro
BeppoSAX Mission Scientist
GCN Circular 705
Subject
GRB000615: BeppoSAX refined coordinates
Date
2000-06-15T15:43:03Z (25 years ago)
From
Giangiacomo Gandolfi at IAS/CNR Frascati <gandolfi@ias.rm.cnr.it>
Refined coordinates of GRB000615 from WFC are:
R.A.(2000)= 233.168
DEC(2000)= +73.848
The error radius is 2'.
G. Gandolfi
on behalf of BeppoSAX Mission Scientist
GCN Circular 706
Subject
GRB000615, R-band photometry
Date
2000-06-15T19:58:37Z (25 years ago)
From
Krzysztof Z. Stanek at CfA <kstanek@cfa.harvard.edu>
K. Z. Stanek (CfA), P. M. Garnavich (Notre Dame) and P. Berlind (FLWO)
report:
We have observed the BeppoSAX error-box of GRB000615 (GCN 703) using
the FLWO 1.2-meter telescope on Mt. Hopkins. The center of the revised
error-box (GCN 705) is located at Galactic coordinates (l,b)=(109.58
deg, 38.81 deg), and the Schlegel et al. (1998) Galactic reddening
toward this direction is very small, E(B-V)=0.024 mag (A_R=0.063
mag). The stellar field is relatively sparse in this direction.
We obtained two 300 sec R-band images, starting at UT June 15 10:30
(i.e. about 4 hours 12 minutes after the detection by BeppoSAX)
followed by one 600 sec R-band image starting at UT June 15 10:42.
Visual comparison of our combined 1200 sec R-band image with the
POSS-II red plate, which reaches about R~20.0 mag, reveals no obvious
``new'' objects. Using DAOPHOT-II (Stetson 1992) on our combined
R-band image we detect about 180 objects with R<20.0 mag in 11x11
arcmin field.
The combined R-band image of the error-box can be seen at
http://cfa-www.harvard.edu/cfa/oir/Research/GRB/.
Further observations are planned at FLWO.
This message can be cited.
GCN Circular 707
Subject
GRB000615: BeppoSAX NFI follow-up preliminary analysis
Date
2000-06-16T11:06:10Z (25 years ago)
From
Giangiacomo Gandolfi at IAS/CNR Frascati <gandolfi@ias.rm.cnr.it>
A BeppoSAX follow up of GRB000615 with the Narrow Field Instruments
started around June 15 at 16:20 UT, i.e. about 10 hours after the GRB.
A quick look analysis of the first orbits of MECS (1.6-10 keV) data shows
a faint and previously unknown source inside the field.
The coordinates are:
R.A.(2000)= 233.058
DEC(2000)= 73.814
with a 1.5' error radius.
This object may be compatible with a radio source from NVSS Catalogue 1.3'
away (RA: 233.043, DEC: 73.835) and not necessarily associated to the GRB.
G. Gandolfi
on behalf of BeppoSAX Mission Scientist
GCN Circular 708
Subject
GRB 000615: NIR observations
Date
2000-06-16T15:57:03Z (25 years ago)
From
Angelo Antonelli at Obs. Astro. di Roma <angelo@quasar.mporzio.astro.it>
A. Di Paola, L.A. Antonelli, G. Licausi, R. Speziali, Osservatorio
Astronomico di Roma, G. Valentini, Osservatorio Astronomico di Teramo,
Italy, on behalf of a larger collaboration report:
We have imaged the BeppoSAX revised error-box of GRB000615 (GCN 705)
using the AZT-24 1.1-meter telescope at Campo Imperatore (AQ). We
observed for a total exposure time of 3600 sec in J-band and 1500 sec
in K-band. Observations started at June 15.9792 UT about 17.2 hours
after BeppoSAX trigger time (GCN 703) and ended at 16.09167 UT. We
imaged the field in J-band twice with a time interval of about 2 hours.
The limiting magnitude in the combined images is J=20.5 mag and K=17.5 mag
(S/N=3) with an average seeing of 2.5" . A preliminary comparison of the
first 900 sec with the last 1500 sec J-band images reveals no obvious fading
objects. The comparison of the combined 3600 sec J-band images with the
POSS-II red plate and the FLWO field (GCN 706), reveals no obvious new
objects.
Further observations of this field are planned at Campo Imperatore.
This message is citable.
[GCN OPS NOTE (26May00): The GRB date in the Subject-line was changed
from 000516 to 000615.]
GCN Circular 709
Subject
GRB000615, further R-band photometry
Date
2000-06-16T22:02:26Z (25 years ago)
From
Krzysztof Z. Stanek at CfA <kstanek@cfa.harvard.edu>
K. Z. Stanek (CfA), P. M. Garnavich (Notre Dame), S. Jha (CfA) and
P. Berlind (FLWO) report:
We have obtained additional images of the BeppoSAX error-box of
GRB000615 (GCNs 703, 705) using the FLWO 1.2-meter telescope on
Mt. Hopkins. We obtained two 4x300 sec R-band image sequences, with
the first sequence starting at UT June 16 04:19, and the second
starting at UT June 16 10:19. As was the case with our first night
images (GCN 706), visual comparison of these new images with the
POSS-II red plate, which reaches about R~20.0 mag, reveals no obvious
new objects.
In addition, by comparing our images from the two nights we are able
to place much stronger limit on any variable optical afterglow of
GRB000615. Employing the image subtraction code ISIS-2 (Alard 1999)
between the two nights reveals no variable objects brighter than about
R~21.5. Using DAOPHOT-II (Stetson 1992) we detect about 350 objects
with R<21.5 mag in 11x11 arcmin field.
Our FLWO R-band fits images from both nights can be accessed from
ftp://cfa-ftp.harvard.edu/pub/kstanek/GRB000615/.
We find one possible variable object detected in the first night
images, which is not present in the second night images. It is located
near at RA=15:33:06.04, DEC=+73:49:46.4 (J2000.0; uncertainty +/-
0.3"; x=431.7, y=614.5 in the "ff1003" image), and its brightness is
about R~21.6 (calibrated using the USNO R-band magnitudes). However,
as the object seems to move slightly in the first night images, we DO
NOT think it is the GRB afterglow.
Further observations are planned at FLWO.
This message can be cited.
GCN Circular 713
Subject
GRB 000615, near-infrared observations
Date
2000-06-17T20:15:25Z (25 years ago)
From
Sylvio Klose at TLS Tautenburg <klose@tls-tautenburg.de>
S. Klose, B. Stecklum (Thueringer Landessternwarte Tautenburg),
O. Fischer (Universitaets-Sternwarte Jena),
J. Greiner (AIP Potsdam),
S. Hippler (Max-Planck-Institut fuer Astronomie, Heidelberg),
R. Davies (Max-Planck-Institut fuer Extraterrestrische Physik, Garching),
L. Montoya (Calar Alto observatory),
F. J. Vrba, A. A. Henden, C. B. Luginbuhl, B. Canzian, S. E. Levine,
H. H. Guetter, J. A. Munn (U.S. Naval Observatory, Flagstaff),
D. H. Hartmann (Clemson University, Clemson),
A. Castro-Tirado (LAEFF-INTA, Madrid, and IAA-CSIC, Granada),
J. Gorosabel (DSRI, Copenhagen),
J. M. Castro Ceron (ROA, San Fernando), and
M. R. Zapatero-Osorio, D. M. Delgado, S. Chueca, M. J. Arevalo
(IAC, Tenerife)
report:
The refined error box of GRB 000615 (Gandolfi et al. GCN #705) was
imaged in two successive runs with the Calar Alto 3.5-m telescope on
June 15, 22:09 UT - 00:25 UT using the near-infrared camera Omega Cass
in the polarimetric mode. The limiting magnitude of either K'-band
image is about K'=19 after adding all frames taken at different
position angles of the wire-grid polarizer.
A red source in the GRB error box with no counterpart on the DSS-2 red
image is at RA, DEC (J2000) = 15:32:35.16, 73:50:45.2 (+/- 1
arcsec). We estimate its magnitude K'=19. Further data reduction is
in progress, the K'-band magnitude can be improved. This source is
also barely visible on an R-band image taken at USNO with the 1.0-m
telescope on June 16, 03:48 UT (limiting magnitude about R=21). It is
also visible as a faint source on an I-band image taken with the IAC
80 telescope on June 15.9 UT (limiting magnitude about 20.5).
We note we do not claim that this is a fading source, since second
epoch K'-band data are not available. At the present stage we cannot
rule out that this is a faint Galactic star with an R-K color of
about 2 mag.
This message is quotable.
GCN Circular 719
Subject
GRB 000615: NIR further observations
Date
2000-06-20T15:10:28Z (25 years ago)
From
Angelo Antonelli at Obs. Astro. di Roma <angelo@quasar.mporzio.astro.it>
A. Di Paola, L.A. Antonelli, F. D'Alessio, Osservatorio
Astronomico di Roma, Italy, A. Arkarov, V. Larionov,
Pulkovo Astronomical Observatory, Russia, on behalf of a
larger collaboration report:
We have obtained further images of the BeppoSAX revised error-box of
GRB000615 (GCN 705) using the AZT-24 1.1-meter telescope at Campo
Imperatore (AQ). We obtained two J-band images. A 1200 sec image with
a limiting magnitude of J=20.1 mag started at June 18.9375 UT. A 3600 sec
image with a limiting magnitude of J=20.7 mag starting at June 19.9229.
A comparison of these new images with the previous observation (GCN 708)
reveals no obvious fading objects in the field.
We detect in both observations the object reported by Klose et al.
(GCN 709) at position RA = 15:32:35.16, DEC = 73:50:45.2 (J2000)
and we estimate its magnitudes compatible with J= 19.1 +/- 0.3 mag
in all the observations.
This message is citable.
GCN Circular 721
Subject
GRB000615, Radio observations
Date
2000-06-20T16:50:12Z (25 years ago)
From
Dale A. Frail at NRAO <dfrail@nrao.edu>
D. A. Frail (NRAO), K. M. Becker (Oberlin), and E. Berger (Caltech)
report on behalf of the Caltech-NRAO-CARA GRB collaboration:
"We have observed the error box of GRB000615 with the VLA
at 8.46 GHz on three occasions: June 15.92, June 17.17, and June 20.13
UT. There are no radio sources in the WFC error circle (GCN #705)
brighter than 150 microJy (i.e. 4 to 5 sigma)."
[GCN OPERATOR'S NOTE: The original submission contained a citation
reference which was wrong. This has been eliminated at the author's request.
The orignal line read:
"We have observed the error box of GRB000615 (GCN #693) with the VLA..."
The new line reads:
"We have observed the error box of GRB000615 with the VLA..."]
GCN Circular 727
Subject
GRB000615: H-band observations
Date
2000-06-21T17:40:34Z (25 years ago)
From
Eliana Palazzi at Inst. Te.S.R.E. Bologna <eliana@tesre.bo.cnr.it>
E. Pian, N. Masetti, E. Palazzi, F. Frontera (ITESRE, CNR, Bologna),
F. Ghinassi, J. Licandro (TNG, La Palma) and G. Gandolfi (IAS, CNR,
Rome), on behalf of a larger collaboration, report:
"Infrared H-band images of the refined error box of GRB000615
(Gandolfi et al., GCN #705), were acquired on June 15.968, 16.2083
and 16.927 UT at the Telescopio Nazionale Galileo (TNG) plus ARNICA
(ARcetri Near Infrared CAmera) in La Palma (Canary Island, Spain),
with total on-source times of 5 min for the first two observations
and 10 min for the third. Seeing was 1 arcsec in the three epochs.
Photometric calibration was performed using standard stars AS30-0
(Hunt et al., 1998, AJ 115, 2594).
The comparison among the three sets, as well as between the sum
of the images of the first two epochs with the observation obtained
on the third epoch (acquired on the following night) does not show any
object with significant brightness variations (at 3-sigma significance)
down to H ~ 20.5 .
The object reported by Klose et al. (GCN #713) is well detected in
our three sets of images with no variations from a measured magnitude
H = 19.6 +-0.3."
This message can be cited.