GRB120614_191151_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20120614_222334235_000002_55184601   133 stars filter C [11317.8s - 11497.8s] expo=180s elev=31.8deg humid= 92% sunelev=-21.0deg (moon at 110.0deg phase=0.28 elev=-23.0 )
AL_20120614_222644985_000002_55184601    91 stars filter C [11508.5s - 11688.5s] expo=180s elev=32.2deg humid= 93% sunelev=-21.1deg (moon at 110.0deg phase=0.28 elev=-22.0 )
AL_20120614_222956411_000002_55184601   146 stars filter R [11699.9s - 11879.9s] expo=180s elev=32.5deg humid= 92% sunelev=-21.3deg (moon at 110.0deg phase=0.28 elev=-22.0 )
AL_20120614_223316926_000002_55184701   100 stars filter C [11900.4s - 12080.4s] expo=180s elev=32.9deg humid= 92% sunelev=-21.5deg (moon at 110.0deg phase=0.28 elev=-22.0 )
AL_20120614_223628161_000002_55184701   169 stars filter C [12091.6s - 12271.6s] expo=180s elev=33.3deg humid= 92% sunelev=-21.6deg (moon at 110.0deg phase=0.28 elev=-21.0 )
AL_20120614_223939541_000002_55184701   142 stars filter R [12283.1s - 12463.1s] expo=180s elev=33.6deg humid= 92% sunelev=-21.8deg (moon at 110.0deg phase=0.28 elev=-21.0 )
AL_20120614_224129133_000002_55184801     0 star  filter C [12484.5s - 12664.5s] expo=180s elev=34.0deg humid= 92% sunelev=-21.9deg (moon at 110.0deg phase=0.28 elev=-20.0 )
AL_20120614_231215602_000002_55185101   134 stars filter C [14239.2s - 14419.2s] expo=180s elev=36.8deg humid= 89% sunelev=-22.7deg (moon at 110.0deg phase=0.28 elev=-17.0 )
AL_20120614_231526682_000002_55185101   134 stars filter C [14430.2s - 14610.2s] expo=180s elev=37.1deg humid= 88% sunelev=-22.8deg (moon at 110.0deg phase=0.28 elev=-16.0 )
AL_20120614_231837135_000002_55185101   157 stars filter R [14620.7s - 14800.7s] expo=180s elev=37.3deg humid= 88% sunelev=-22.8deg (moon at 110.0deg phase=0.28 elev=-16.0 )
AL_20120614_232157482_000002_55185201   112 stars filter C [14820.9s - 15000.9s] expo=180s elev=37.6deg humid= 88% sunelev=-22.9deg (moon at 111.0deg phase=0.28 elev=-15.0 )
AL_20120614_232508374_000002_55185201   175 stars filter C [15011.9s - 15191.9s] expo=180s elev=37.8deg humid= 88% sunelev=-22.9deg (moon at 111.0deg phase=0.28 elev=-15.0 )
AL_20120614_232819795_000002_55185201   140 stars filter R [15203.3s - 15383.3s] expo=180s elev=38.1deg humid= 88% sunelev=-22.9deg (moon at 111.0deg phase=0.28 elev=-15.0 )
AL_20120614_233142172_000002_55185301   161 stars filter C [15405.7s - 15585.7s] expo=180s elev=38.3deg humid= 88% sunelev=-22.9deg (moon at 111.0deg phase=0.28 elev=-14.0 )
AL_20120614_233453328_000002_55185301   179 stars filter C [15596.9s - 15776.9s] expo=180s elev=38.5deg humid= 86% sunelev=-22.9deg (moon at 111.0deg phase=0.28 elev=-14.0 )
AL_20120614_233804814_000002_55185301    91 stars filter R [15788.3s - 15968.3s] expo=180s elev=38.7deg humid= 86% sunelev=-22.9deg (moon at 111.0deg phase=0.28 elev=-13.0 )
AL_20120614_235159513_000002_55185401   168 stars filter C [16623.0s - 16803.0s] expo=180s elev=39.5deg humid= 84% sunelev=-22.8deg (moon at 111.0deg phase=0.28 elev=-11.0 )
AL_20120614_235510465_000002_55185401   134 stars filter R [16814.0s - 16994.0s] expo=180s elev=39.6deg humid= 83% sunelev=-22.8deg (moon at 111.0deg phase=0.28 elev=-11.0 )
AL_20120614_235820746_000002_55185401   164 stars filter V [17004.3s - 17184.3s] expo=180s elev=39.8deg humid= 83% sunelev=-22.7deg (moon at 111.0deg phase=0.28 elev=-10.0 )
Informations from GCN notice:
This is a GRB
Date of the alert : 2456093.2999 2012-06-14T19:11:51.359
Decoded useful notice informations.
RA(J2000.0) : 280.2508 18h41m00s1
DEC(J2000.0) : -5.5968 -05d35m48s47
Error radius : 5.0 arcsec
Error box : x=99:102 y=24:27 (pixels)

Other pages about TAROT Calern observatory observations

Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=26.809328 lat=-0.251657
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=1.717
Assuming Rv=3.1: Av=5.691 Ar=4.589 Ai=3.331
extmap.fit: 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
GRBlog
ROTSE last GRB images

Example of a GCNC email for this burst

gcncirc@capella.gsfc.nasa.gov
GRB 120614: TAROT Calern observatory optical observations
----------------------------------------------------------------------
Klotz A. (IRAP-CNRS-OMP), Gendre B. (ASDC/INAF-OAR),
Boer M. (UNS-CNRS-OCA), Atteia J.L. (IRAP-CNRS-OMP) report:

We imaged the field of GRB 120614 detected by SWIFT
(trigger 524364) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 3.14h after the GRB trigger.
The elevation of the field increased from
31 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2012-06-14T19:11:51.359

The first image is trailed with a duration of 180.0s
(see the description in Klotz et al., 2006, A&A 451, L39).
We do not detect any OT with a limiting magnitude of:
t0+11317.8s to t0+11497.8s : R > 15.1

The second image is 180.0s exposure in tracking mode:
t0+11508.5s to t0+11688.5s : R > 16.2

We co-added a series of exposures:
t0+11508.5s to t0+12664.5s : 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 3.14h 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= 26.8093 lat= -0.2517
and the galactic extinction in R band is 4.6 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.
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