GRB140709_603810_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20140709_012219959_000003_18273001    84 stars filter C [76426399.9s - 76426489.9s] expo= 90s elev=80.2deg humid= 59% sunelev=-19.7deg (moon at  90.0deg phase=0.74 elev= -3.0 )
AL_20140709_012400975_000003_18273001    84 stars filter C [76426500.9s - 76426590.9s] expo= 90s elev=80.0deg humid= 59% sunelev=-19.5deg (moon at  90.0deg phase=0.74 elev= -3.0 )
AL_20140709_012541928_000003_18273001    82 stars filter C [76426601.9s - 76426691.9s] expo= 90s elev=79.8deg humid= 60% sunelev=-19.4deg (moon at  90.0deg phase=0.74 elev= -3.0 )
AL_20140709_012731490_000003_18273101    88 stars filter C [76426711.4s - 76426801.4s] expo= 90s elev=79.6deg humid= 60% sunelev=-19.2deg (moon at  90.0deg phase=0.74 elev= -4.0 )
AL_20140709_012912756_000003_18273101    89 stars filter C [76426812.6s - 76426902.6s] expo= 90s elev=79.4deg humid= 60% sunelev=-19.1deg (moon at  90.0deg phase=0.74 elev= -4.0 )
AL_20140709_013053944_000003_18273101    88 stars filter C [76426913.9s - 76427003.9s] expo= 90s elev=79.2deg humid= 60% sunelev=-19.0deg (moon at  90.0deg phase=0.74 elev= -4.0 )
AL_20140709_013246072_000003_18273201    79 stars filter C [76427026.0s - 76427116.0s] expo= 90s elev=78.9deg humid= 60% sunelev=-18.8deg (moon at  90.0deg phase=0.74 elev= -4.0 )
AL_20140709_013426807_000003_18273201    80 stars filter C [76427126.7s - 76427216.7s] expo= 90s elev=78.7deg humid= 60% sunelev=-18.7deg (moon at  90.0deg phase=0.74 elev= -5.0 )
AL_20140709_013607978_000003_18273201    82 stars filter C [76427227.9s - 76427317.9s] expo= 90s elev=78.5deg humid= 61% sunelev=-18.5deg (moon at  90.0deg phase=0.74 elev= -5.0 )
AL_20140709_013800853_000003_18273301    85 stars filter C [76427340.7s - 76427430.7s] expo= 90s elev=78.3deg humid= 60% sunelev=-18.4deg (moon at  90.0deg phase=0.74 elev= -5.0 )
AL_20140709_013942228_000003_18273301    78 stars filter C [76427442.2s - 76427532.2s] expo= 90s elev=78.1deg humid= 60% sunelev=-18.2deg (moon at  90.0deg phase=0.74 elev= -6.0 )
AL_20140709_014122981_000003_18273301    77 stars filter C [76427542.9s - 76427632.9s] expo= 90s elev=77.8deg humid= 60% sunelev=-18.1deg (moon at  90.0deg phase=0.74 elev= -6.0 )
AL_20140709_014556543_000003_18273401   103 stars filter C [76427726.5s - 76427906.5s] expo=180s elev=77.3deg humid= 61% sunelev=-17.8deg (moon at  90.0deg phase=0.74 elev= -6.0 )
AL_20140709_014907121_000003_18273401    98 stars filter C [76427917.0s - 76428097.0s] expo=180s elev=76.9deg humid= 61% sunelev=-17.5deg (moon at  90.0deg phase=0.74 elev= -7.0 )
AL_20140709_015219000_000003_18273401    84 stars filter R [76428108.9s - 76428288.9s] expo=180s elev=76.4deg humid= 60% sunelev=-17.2deg (moon at  90.0deg phase=0.74 elev= -7.0 )
AL_20140709_015535063_000003_18273501    95 stars filter C [76428305.0s - 76428485.0s] expo=180s elev=76.0deg humid= 60% sunelev=-16.9deg (moon at  90.0deg phase=0.74 elev= -8.0 )
AL_20140709_015846125_000003_18273501    87 stars filter C [76428496.0s - 76428676.0s] expo=180s elev=75.5deg humid= 60% sunelev=-16.6deg (moon at  90.0deg phase=0.74 elev= -9.0 )
AL_20140709_020157253_000003_18273501    92 stars filter R [76428687.2s - 76428867.2s] expo=180s elev=75.1deg humid= 61% sunelev=-16.2deg (moon at  90.0deg phase=0.74 elev= -9.0 )
AL_20140709_020515940_000003_18273601   104 stars filter C [76428885.9s - 76429065.9s] expo=180s elev=74.6deg humid= 61% sunelev=-15.9deg (moon at  90.0deg phase=0.74 elev=-10.0 )
AL_20140709_020827096_000003_18273601    95 stars filter C [76429077.1s - 76429257.1s] expo=180s elev=74.1deg humid= 62% sunelev=-15.6deg (moon at  90.0deg phase=0.74 elev=-10.0 )
AL_20140709_021138362_000003_18273601    84 stars filter R [76429268.3s - 76429448.3s] expo=180s elev=73.7deg humid= 62% sunelev=-15.2deg (moon at  90.0deg phase=0.74 elev=-11.0 )
AL_20140709_021500491_000003_18273701    81 stars filter C [76429470.4s - 76429650.4s] expo=180s elev=73.2deg humid= 62% sunelev=-14.9deg (moon at  90.0deg phase=0.74 elev=-11.0 )
AL_20140709_021811116_000003_18273701   101 stars filter C [76429661.1s - 76429841.1s] expo=180s elev=72.7deg humid= 61% sunelev=-14.5deg (moon at  90.0deg phase=0.74 elev=-12.0 )
AL_20140709_022121928_000003_18273701    94 stars filter R [76429851.9s - 76430031.9s] expo=180s elev=72.2deg humid= 62% sunelev=-14.2deg (moon at  90.0deg phase=0.74 elev=-12.0 )
AL_20140709_022443401_000003_18273801    98 stars filter C [76430053.3s - 76430233.3s] expo=180s elev=71.7deg humid= 62% sunelev=-13.8deg (moon at  90.0deg phase=0.74 elev=-13.0 )
AL_20140709_022754854_000003_18273801    99 stars filter C [76430244.8s - 76430424.8s] expo=180s elev=71.2deg humid= 62% sunelev=-13.4deg (moon at  90.0deg phase=0.74 elev=-13.0 )
AL_20140709_023106072_000003_18273801    77 stars filter R [76430436.0s - 76430616.0s] expo=180s elev=70.7deg humid= 62% sunelev=-13.1deg (moon at  90.0deg phase=0.74 elev=-14.0 )
AL_20140709_023427719_000003_18273901    87 stars filter C [76430637.6s - 76430817.6s] expo=180s elev=70.2deg humid= 63% sunelev=-12.7deg (moon at  90.0deg phase=0.74 elev=-15.0 )
AL_20140709_023738703_000003_18273901    90 stars filter C [76430828.6s - 76431008.6s] expo=180s elev=69.7deg humid= 63% sunelev=-12.3deg (moon at  90.0deg phase=0.74 elev=-15.0 )
AL_20140709_024049469_000003_18273901    81 stars filter R [76431019.3s - 76431199.3s] expo=180s elev=69.2deg humid= 62% sunelev=-11.9deg (moon at  90.0deg phase=0.74 elev=-16.0 )
AL_20140709_024413130_000003_18274001    77 stars filter C [76431223.1s - 76431403.1s] expo=180s elev=68.7deg humid= 61% sunelev=-11.5deg (moon at  90.0deg phase=0.74 elev=-16.0 )
AL_20140709_024724114_000003_18274001    71 stars filter C [76431414.1s - 76431594.1s] expo=180s elev=68.2deg humid= 60% sunelev=-11.1deg (moon at  90.0deg phase=0.74 elev=-17.0 )
AL_20140709_025035364_000003_18274001    60 stars filter R [76431605.3s - 76431785.3s] expo=180s elev=67.7deg humid= 60% sunelev=-10.7deg (moon at  90.0deg phase=0.74 elev=-17.0 )
AL_20140709_025355649_000003_18274101    53 stars filter C [76431805.5s - 76431985.5s] expo=180s elev=67.2deg humid= 60% sunelev=-10.3deg (moon at  90.0deg phase=0.74 elev=-18.0 )
AL_20140709_025706852_000003_18274101     0 star  filter C [76431996.8s - 76432176.8s] expo=180s elev=66.7deg humid= 60% sunelev=-9.9deg (moon at  90.0deg phase=0.74 elev=-18.0 )
AL_20140709_030018290_000003_18274101    45 stars filter R [76432188.2s - 76432368.2s] expo=180s elev=66.2deg humid= 59% sunelev=-9.5deg (moon at  90.0deg phase=0.74 elev=-19.0 )
Informations from GCN notice:
This is not a GRB (a retractation has been edited)
Date of GRB : 2455962.9912571758 2012-02-05T11:47:24.620
Date of notice : 2455962.9915046296 2012-02-05T11:47:46.000
Refined position : no
RA(J2000.0) : 40.1 02h40m24s0
DEC(J2000.0) : 61.22 +61d13m12s00
Error box : x=-45268:-45158 y=56179:56289 (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=86.9081393181 lat=8.54973188111
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.390
Assuming Rv=3.1: Av=1.291 Ar=1.041 Ai=0.756 Extinction map E(B-V) from Schlegel:

Field of View is about 60 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 140709: TAROT Calern observatory optical observations
Klotz A. (IRAP-CNRS-OMP), Gendre B. (IRAP-CNRS-OMP),
Boer M., Siellez K., Dereli H., Bardho O. (UNS-CNRS-OCA),
Atteia J.L. (IRAP-CNRS-OMP) report:

We imaged the field of GRB 140709 detected by SWIFT
(trigger 513505) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 76426399.9s after the GRB trigger
(76426378.8s after the notice). The elevation of the field decreased from
80 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2012-02-05T11:47:24.864

The first image is trailed with a duration of 90.0s
(see the description in Klotz et al., 2006, A&A 451, L39).
We do not detect any OT with a limiting magnitude of:
t0+76426399.9s to t0+76426489.9s : R > 15.1

The second image is 90.0s exposure in tracking mode:
t0+76426500.9s to t0+76426590.9s : R > 16.2

We co-added a series of exposures:
t0+76426500.9s to t0+76427116.0s : 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 76426399.9s 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= 86.9081 lat= +8.5497
and the galactic extinction in R band is 1.0 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.