GRB100401_190414_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20100401_190502532_100401_19040000    31 stars filter C [ 1816.1s -  1846.1s] expo= 30s elev=52.9deg humid= 49% sunelev=-12.7deg (moon at 148.0deg phase=0.80 elev=-22.0 )
AL_20100401_190550860_100401_19040000    34 stars filter C [ 1864.5s -  1894.5s] expo= 30s elev=52.7deg humid= 50% sunelev=-12.8deg (moon at 148.0deg phase=0.80 elev=-22.0 )
AL_20100401_190639266_100401_19040000    33 stars filter C [ 1912.8s -  1942.8s] expo= 30s elev=52.6deg humid= 49% sunelev=-12.9deg (moon at 148.0deg phase=0.80 elev=-22.0 )
AL_20100401_190725641_100401_19040000    31 stars filter C [ 1959.2s -  1989.2s] expo= 30s elev=52.5deg humid= 49% sunelev=-13.1deg (moon at 148.0deg phase=0.80 elev=-22.0 )
AL_20100401_190811455_100401_19040000    33 stars filter C [ 2003.5s -  2033.5s] expo= 30s elev=52.3deg humid= 49% sunelev=-13.2deg (moon at 148.0deg phase=0.80 elev=-22.0 )
AL_20100401_190858330_100401_19040000    34 stars filter C [ 2051.9s -  2081.9s] expo= 30s elev=52.2deg humid= 48% sunelev=-13.3deg (moon at 148.0deg phase=0.79 elev=-22.0 )
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=159.867543 lat=-1.274278
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=3.187
Assuming Rv=3.1: Av=10.565 Ar=8.519 Ai=6.183 Extinction map E(B-V) from Schlegel:

Field of View is about 55 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 100401: 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 100401 detected by SWIFT
(trigger 418109) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 1816.1s after the GRB trigger
(XXXs after the notice). The elevation of the field decreased from
52 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2010-04-01T18:34:10.330

The first image is trailed with a duration of 30.0s
(see the description in Klotz et al., 2006, A&A 451, L39).
We do not detect any OT with a limiting magnitude of:
t0+1816.1s to t0+1846.1s : R > 15.1

The second image is 30.0s exposure in tracking mode:
t0+1864.5s to t0+1894.5s : R > 16.2

We co-added a series of exposures:
t0+1864.5s to t0+2081.9s : 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 1816.1s 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=159.8675 lat= -1.2743
and the galactic extinction in R band is 8.5 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

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