GRB120119_040448_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20120119_040607929_120119_04040     0 star  filter C [   33.1s -    93.1s] expo= 60s elev=10.4deg humid= 27% sunelev=-31.1deg (moon at 116.0deg phase=0.29 elev= +5.0 )
AL_20120119_040652617_120119_04040     8 stars filter C [  107.8s -   137.8s] expo= 30s elev=10.3deg humid= 28% sunelev=-30.9deg (moon at 116.0deg phase=0.29 elev= +5.0 )
AL_20120119_040733601_120119_04040    10 stars filter C [  148.8s -   178.8s] expo= 30s elev=10.1deg humid= 28% sunelev=-30.8deg (moon at 116.0deg phase=0.29 elev= +5.0 )
AL_20120119_040813836_120119_04040     7 stars filter C [  189.0s -   219.0s] expo= 30s elev=10.0deg humid= 28% sunelev=-30.7deg (moon at 116.0deg phase=0.29 elev= +5.0 )
AL_20120119_040854414_120119_04040     6 stars filter C [  229.5s -   259.5s] expo= 30s elev= 9.9deg humid= 29% sunelev=-30.5deg (moon at 116.0deg phase=0.29 elev= +6.0 )
AL_20120119_040935320_120119_04040     3 stars filter C [  270.5s -   300.5s] expo= 30s elev= 9.8deg humid= 29% sunelev=-30.4deg (moon at 116.0deg phase=0.29 elev= +6.0 )
AL_20120119_041644388_000002_44396301     3 stars filter C [  639.6s -   729.6s] expo= 90s elev= 8.7deg humid= 29% sunelev=-29.3deg (moon at 116.0deg phase=0.29 elev= +7.0 )
AL_20120119_041824654_000002_44396301     3 stars filter C [  739.9s -   829.9s] expo= 90s elev= 8.4deg humid= 29% sunelev=-29.0deg (moon at 116.0deg phase=0.29 elev= +7.0 )
AL_20120119_042005170_000002_44396301     2 stars filter R [  840.4s -   930.4s] expo= 90s elev= 8.1deg humid= 30% sunelev=-28.7deg (moon at 116.0deg phase=0.29 elev= +7.0 )
AL_20120119_042145716_000002_44396301     3 stars filter C [  940.9s -  1030.9s] expo= 90s elev= 7.9deg humid= 31% sunelev=-28.4deg (moon at 116.0deg phase=0.29 elev= +7.0 )
AL_20120119_042326175_000002_44396301     3 stars filter C [ 1041.4s -  1131.4s] expo= 90s elev= 7.6deg humid= 31% sunelev=-28.1deg (moon at 116.0deg phase=0.29 elev= +7.0 )
AL_20120119_042506707_000002_44396301     3 stars filter R [ 1141.9s -  1231.9s] expo= 90s elev= 7.3deg humid= 31% sunelev=-27.8deg (moon at 116.0deg phase=0.29 elev= +8.0 )
AL_20120119_042746410_000002_44396401     3 stars filter C [ 1301.6s -  1391.6s] expo= 90s elev= 6.9deg humid= 32% sunelev=-27.3deg (moon at 116.0deg phase=0.29 elev= +8.0 )
AL_20120119_042927129_000002_44396401     3 stars filter C [ 1402.3s -  1492.3s] expo= 90s elev= 6.6deg humid= 32% sunelev=-27.0deg (moon at 116.0deg phase=0.29 elev= +8.0 )
AL_20120119_043107378_000002_44396401     2 stars filter R [ 1502.6s -  1592.6s] expo= 90s elev= 6.3deg humid= 32% sunelev=-26.7deg (moon at 116.0deg phase=0.29 elev= +8.0 )
AL_20120119_043247895_000002_44396401     3 stars filter C [ 1603.1s -  1693.1s] expo= 90s elev= 6.0deg humid= 32% sunelev=-26.4deg (moon at 116.0deg phase=0.29 elev= +9.0 )
AL_20120119_043428385_000002_44396401     3 stars filter C [ 1703.6s -  1793.6s] expo= 90s elev= 5.7deg humid= 32% sunelev=-26.1deg (moon at 116.0deg phase=0.29 elev= +9.0 )
AL_20120119_043608885_000002_44396401     2 stars filter R [ 1804.1s -  1894.1s] expo= 90s elev= 5.4deg humid= 32% sunelev=-25.8deg (moon at 116.0deg phase=0.29 elev= +9.0 )
AL_20120119_044409047_000002_44396501     2 stars filter C [ 2194.2s -  2374.2s] expo=180s elev= 4.2deg humid= 32% sunelev=-24.6deg (moon at 116.0deg phase=0.29 elev=+10.0 )
AL_20120119_044719296_000002_44396501     2 stars filter C [ 2384.5s -  2564.5s] expo=180s elev= 3.7deg humid= 32% sunelev=-24.1deg (moon at 116.0deg phase=0.29 elev=+10.0 )
AL_20120119_045029125_000002_44396501     0 star  filter R [ 2574.3s -  2754.3s] expo=180s elev= 3.2deg humid= 32% sunelev=-23.5deg (moon at 116.0deg phase=0.29 elev=+11.0 )
AL_20120119_045339399_000002_44396501     1 star  filter C [ 2764.6s -  2944.6s] expo=180s elev= 2.6deg humid= 32% sunelev=-22.9deg (moon at 116.0deg phase=0.29 elev=+11.0 )
AL_20120119_045649929_000002_44396501     0 star  filter C [ 2955.1s -  3135.1s] expo=180s elev= 2.1deg humid= 32% sunelev=-22.4deg (moon at 116.0deg phase=0.29 elev=+11.0 )
AL_20120119_045959930_000002_44396501     0 star  filter R [ 3145.1s -  3325.1s] expo=180s elev= 1.6deg humid= 31% sunelev=-21.8deg (moon at 116.0deg phase=0.29 elev=+12.0 )
AL_20120119_050411043_000002_44396601     0 star  filter C [ 3396.2s -  3576.2s] expo=180s elev= 0.9deg humid= 31% sunelev=-21.0deg (moon at 116.0deg phase=0.29 elev=+12.0 )
AL_20120119_050721294_000002_44396601     0 star  filter C [ 3586.5s -  3766.5s] expo=180s elev= 0.5deg humid= 31% sunelev=-20.5deg (moon at 116.0deg phase=0.29 elev=+13.0 )
AL_20120119_051342050_000002_44396601     0 star  filter C [ 3967.3s -  4147.3s] expo=180s elev=-1.1deg humid= 30% sunelev=-19.4deg (moon at 116.0deg phase=0.29 elev=+13.0 )
AL_20120119_051653082_000002_44396601     0 star  filter C [ 4158.2s -  4338.2s] expo=180s elev=-1.7deg humid= 29% sunelev=-18.8deg (moon at 116.0deg phase=0.29 elev=+14.0 )
AL_20120119_052004036_000002_44396601     0 star  filter R [ 4349.2s -  4529.2s] expo=180s elev=-2.3deg humid= 29% sunelev=-18.2deg (moon at 116.0deg phase=0.29 elev=+14.0 )
Informations from GCN notice:
This is a GRB
Date of GRB : 2455945.6697940971 2012-01-19T04:04:30.209
Date of notice : 2455945.6699999999 2012-01-19T04:04:47.999
Refined position : yes (error radius=0.7 arcsec)
RA(J2000.0) : 120.028800 08h00m06s9
DEC(J2000.0) : -9.081500 -09d04m53s40
Error box : x=61:62 y=56:56 (pixels)

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=229.084663 lat=10.806620
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.120
Assuming Rv=3.1: Av=0.399 Ar=0.322 Ai=0.234 Extinction map E(B-V) from Schlegel:

Field of View is about 61 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 120119: TAROT Calern observatory optical observations
Klotz A. (IRAP-OMP), Gendre B. (ASDC/INAF-OAR),
Boer M. (OCA-CNRS), Atteia J.L. (IRAP-OMP) report:

We imaged the field of GRB 120119 detected by SWIFT
(trigger 512035) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 33.1s after the GRB trigger
(15.0s after the notice). The elevation of the field decreased from
10 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2012-01-19T04:04:29.856

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+33.1s to t0+93.1s : R > 15.1

The second image is 30.0s exposure in tracking mode:
t0+107.8s to t0+137.8s : R > 16.2

We co-added a series of exposures:
t0+107.8s to t0+729.6s : 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 33.1s 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=229.0847 lat=+10.8066
and the galactic extinction in R band is 0.3 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.