GRB100915_013223_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20100915_013347416_100915_01320000     0 star  filter C [   96.7s -   156.7s] expo= 60s elev=47.7deg humid= 65% sunelev=-35.1deg (moon at 100.0deg phase=0.49 elev=-42.0 )
AL_20100915_013434699_100915_01320000    40 stars filter C [  174.0s -   204.0s] expo= 30s elev=47.6deg humid= 65% sunelev=-35.0deg (moon at 100.0deg phase=0.49 elev=-42.0 )
AL_20100915_013522385_100915_01320000    33 stars filter C [  221.7s -   251.7s] expo= 30s elev=47.5deg humid= 65% sunelev=-34.9deg (moon at 100.0deg phase=0.49 elev=-43.0 )
AL_20100915_013609604_100915_01320000    36 stars filter C [  268.9s -   298.9s] expo= 30s elev=47.4deg humid= 65% sunelev=-34.8deg (moon at 100.0deg phase=0.49 elev=-43.0 )
AL_20100915_013657542_100915_01320000    39 stars filter C [  316.8s -   346.8s] expo= 30s elev=47.4deg humid= 65% sunelev=-34.7deg (moon at 100.0deg phase=0.49 elev=-43.0 )
AL_20100915_013745229_100915_01320000    38 stars filter C [  364.5s -   394.5s] expo= 30s elev=47.3deg humid= 65% sunelev=-34.6deg (moon at 100.0deg phase=0.49 elev=-43.0 )
No informations from GCN notice.

Other pages about TAROT Calern observatory observations

Status of this alert received by TAROT Calern observatory.
Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=102.148116 lat=12.526112
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.512
Assuming Rv=3.1: Av=1.696 Ar=1.367 Ai=0.992 Extinction map E(B-V) from Schlegel:

Field of View is about 62 arcmin (north is NOT up !)

Bibliography (Last GCNC circulars and status of satellites)

GCN infos of this burst
GCN notice of this burst
Sloan Digital Sky Survey Observations of Gamma Ray Burst Fields
GCN info bursts
Gamma-ray burst real-time sky map
ROTSE last GRB images

Example of a GCNC email for this burst
GRB 100915: TAROT Calern observatory optical observations
Klotz A. (CESR-OMP), Gendre B. (IASF),
Boer M. (OHP-OAMP), Atteia J.L. (LATT-OMP) report:

We imaged the field of GRB 100915 detected by SWIFT
(trigger 434178) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 96.7s after the GRB trigger
(XXXs after the notice). The elevation of the field decreased from
47 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2010-09-15T01:31:05.664

The first image is trailed with a duration of 60.0s
(see the description in Klotz et al., 2006, A&A 451, L39).
We do not detect any OT with a limiting magnitude of:
t0+96.7s to t0+156.7s : R > 15.1

The second image is 30.0s exposure in tracking mode:
t0+174.0s to t0+204.0s : R > 16.2

We co-added a series of exposures:
t0+174.0s to t0+394.5s : R > 17.7
---- YES
We detect a new fading source in the error box given by SWIFT
We detected the candidate couterpart mentioned by XXX et al. (GCNC XXXX)
at the following position (+/- 3 arcsec):

RA(J2000.0) = XXh XXm XX.XXs
DEC(J2000.0) +XXd XX' XX.X"

OT was R~XX.X at 96.7s after GRB.

Magnitudes were estimated with the nearby USNO-B1 stars
and are not corrected for galactic dust extinction.

N.B. Galactic coordinates are lon=102.1481 lat=+12.5261
and the galactic extinction in R band is 1.4 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

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