GRB150624_225002_INTEGRAL at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20150624_225124773_000000_00000001     0 star  filter C [   17.9s -    77.9s] expo= 60s elev=55.0deg humid= 47% sunelev=-22.1deg (moon at 115.0deg phase=0.53 elev= +7.0 )
AL_20150624_225210195_000000_00000001    75 stars filter C [   93.3s -   123.3s] expo= 30s elev=55.1deg humid= 47% sunelev=-22.1deg (moon at 115.0deg phase=0.53 elev= +7.0 )
AL_20150624_225250445_000000_00000001    81 stars filter C [  133.6s -   163.6s] expo= 30s elev=55.3deg humid= 47% sunelev=-22.2deg (moon at 115.0deg phase=0.53 elev= +7.0 )
AL_20150624_225331007_000000_00000001    84 stars filter C [  174.1s -   204.1s] expo= 30s elev=55.4deg humid= 47% sunelev=-22.2deg (moon at 115.0deg phase=0.53 elev= +7.0 )
AL_20150624_225411711_000000_00000001    78 stars filter C [  214.8s -   244.8s] expo= 30s elev=55.5deg humid= 47% sunelev=-22.2deg (moon at 115.0deg phase=0.53 elev= +7.0 )
AL_20150624_225452492_000000_00000001    80 stars filter C [  255.6s -   285.6s] expo= 30s elev=55.6deg humid= 47% sunelev=-22.2deg (moon at 115.0deg phase=0.53 elev= +7.0 )
AL_20150624_225633029_000000_00000001   112 stars filter C [  296.1s -   386.1s] expo= 90s elev=55.8deg humid= 47% sunelev=-22.3deg (moon at 115.0deg phase=0.53 elev= +7.0 )
AL_20150624_225814435_000000_00000001   117 stars filter C [  397.6s -   487.6s] expo= 90s elev=56.1deg humid= 47% sunelev=-22.3deg (moon at 115.0deg phase=0.53 elev= +6.0 )
AL_20150624_225954716_000000_00000001    82 stars filter R [  497.8s -   587.8s] expo= 90s elev=56.5deg humid= 48% sunelev=-22.4deg (moon at 115.0deg phase=0.53 elev= +6.0 )
AL_20150624_230135044_000000_00000001   110 stars filter C [  598.1s -   688.1s] expo= 90s elev=56.8deg humid= 48% sunelev=-22.4deg (moon at 115.0deg phase=0.53 elev= +6.0 )
AL_20150624_230316482_000000_00000001   106 stars filter C [  699.6s -   789.6s] expo= 90s elev=57.1deg humid= 48% sunelev=-22.4deg (moon at 115.0deg phase=0.53 elev= +5.0 )
AL_20150624_230457232_000000_00000001    84 stars filter R [  800.3s -   890.3s] expo= 90s elev=57.4deg humid= 48% sunelev=-22.5deg (moon at 115.0deg phase=0.53 elev= +5.0 )
AL_20150624_230638218_000000_00000001   107 stars filter C [  901.3s -   991.3s] expo= 90s elev=57.7deg humid= 48% sunelev=-22.5deg (moon at 115.0deg phase=0.53 elev= +5.0 )
AL_20150624_230819655_000000_00000001   107 stars filter C [ 1002.7s -  1092.7s] expo= 90s elev=58.0deg humid= 48% sunelev=-22.6deg (moon at 115.0deg phase=0.53 elev= +5.0 )
AL_20150624_230959937_000000_00000001    86 stars filter R [ 1103.0s -  1193.0s] expo= 90s elev=58.3deg humid= 49% sunelev=-22.6deg (moon at 115.0deg phase=0.53 elev= +4.0 )
AL_20150624_231141343_000000_00000001   117 stars filter C [ 1204.5s -  1294.5s] expo= 90s elev=58.6deg humid= 49% sunelev=-22.6deg (moon at 115.0deg phase=0.53 elev= +4.0 )
AL_20150624_231322124_000000_00000001   101 stars filter C [ 1305.2s -  1395.2s] expo= 90s elev=58.9deg humid= 49% sunelev=-22.7deg (moon at 115.0deg phase=0.53 elev= +4.0 )
AL_20150624_231503327_000000_00000001    86 stars filter R [ 1406.4s -  1496.4s] expo= 90s elev=59.2deg humid= 49% sunelev=-22.7deg (moon at 115.0deg phase=0.53 elev= +3.0 )
AL_20150624_231644482_000000_00000001   101 stars filter C [ 1507.7s -  1597.7s] expo= 90s elev=59.5deg humid= 49% sunelev=-22.7deg (moon at 115.0deg phase=0.53 elev= +3.0 )
AL_20150624_231955107_000000_00000001   128 stars filter C [ 1608.2s -  1788.2s] expo=180s elev=59.9deg humid= 49% sunelev=-22.7deg (moon at 115.0deg phase=0.53 elev= +3.0 )
AL_20150624_232305576_000000_00000001   108 stars filter C [ 1798.7s -  1978.7s] expo=180s elev=60.5deg humid= 49% sunelev=-22.8deg (moon at 115.0deg phase=0.53 elev= +2.0 )
AL_20150624_232616138_000000_00000001   105 stars filter R [ 1989.2s -  2169.2s] expo=180s elev=61.1deg humid= 49% sunelev=-22.8deg (moon at 115.0deg phase=0.53 elev= +1.0 )
AL_20150624_232927527_000000_00000001   125 stars filter C [ 2180.6s -  2360.6s] expo=180s elev=61.6deg humid= 50% sunelev=-22.8deg (moon at 115.0deg phase=0.53 elev= +1.0 )
AL_20150624_233238292_000000_00000001   106 stars filter C [ 2371.4s -  2551.4s] expo=180s elev=62.2deg humid= 51% sunelev=-22.8deg (moon at 115.0deg phase=0.53 elev= +0.0 )
AL_20150624_233549245_000000_00000001   103 stars filter R [ 2562.4s -  2742.4s] expo=180s elev=62.8deg humid= 49% sunelev=-22.8deg (moon at 115.0deg phase=0.53 elev= +0.0 )
AL_20150624_233859813_000000_00000001   103 stars filter C [ 2752.9s -  2932.9s] expo=180s elev=63.3deg humid= 48% sunelev=-22.8deg (moon at 115.0deg phase=0.53 elev= +0.0 )
AL_20150624_234211485_000000_00000001   123 stars filter C [ 2944.6s -  3124.6s] expo=180s elev=63.9deg humid= 48% sunelev=-22.8deg (moon at 115.0deg phase=0.53 elev= +0.0 )
AL_20150624_234521766_000000_00000001    97 stars filter R [ 3134.9s -  3314.9s] expo=180s elev=64.5deg humid= 48% sunelev=-22.8deg (moon at 115.0deg phase=0.53 elev= -1.0 )
AL_20150624_234833233_000000_00000001   118 stars filter C [ 3326.3s -  3506.3s] expo=180s elev=65.0deg humid= 48% sunelev=-22.8deg (moon at 115.0deg phase=0.53 elev= -1.0 )
AL_20150624_235143952_000000_00000001   127 stars filter C [ 3517.0s -  3697.0s] expo=180s elev=65.6deg humid= 48% sunelev=-22.8deg (moon at 115.0deg phase=0.53 elev= -2.0 )
AL_20150624_235455389_000000_00000001    86 stars filter R [ 3708.5s -  3888.5s] expo=180s elev=66.2deg humid= 48% sunelev=-22.7deg (moon at 115.0deg phase=0.53 elev= -3.0 )
AL_20150624_235806065_000000_00000001   125 stars filter C [ 3899.2s -  4079.2s] expo=180s elev=66.7deg humid= 50% sunelev=-22.7deg (moon at 115.0deg phase=0.53 elev= -3.0 )
AL_20150625_000117284_000000_00000001   126 stars filter C [ 4090.5s -  4270.5s] expo=180s elev=67.3deg humid= 50% sunelev=-22.6deg (moon at 115.0deg phase=0.53 elev= -4.0 )
AL_20150625_000428097_000000_00000001   105 stars filter R [ 4281.2s -  4461.2s] expo=180s elev=67.8deg humid= 51% sunelev=-22.5deg (moon at 115.0deg phase=0.53 elev= -4.0 )
AL_20150625_000739288_000000_00000001   127 stars filter C [ 4472.4s -  4652.4s] expo=180s elev=68.4deg humid= 51% sunelev=-22.5deg (moon at 115.0deg phase=0.53 elev= -5.0 )
AL_20150625_001050070_000000_00000001   105 stars filter C [ 4663.2s -  4843.2s] expo=180s elev=68.9deg humid= 51% sunelev=-22.4deg (moon at 115.0deg phase=0.53 elev= -5.0 )
AL_20150625_001401070_000000_00000001   112 stars filter R [ 4854.1s -  5034.1s] expo=180s elev=69.4deg humid= 51% sunelev=-22.3deg (moon at 115.0deg phase=0.53 elev= -6.0 )
AL_20150625_001711820_000000_00000001   120 stars filter C [ 5044.9s -  5224.9s] expo=180s elev=70.0deg humid= 52% sunelev=-22.2deg (moon at 115.0deg phase=0.53 elev= -7.0 )
AL_20150625_002007062_000000_00000001     0 star  filter C [ 5236.3s -  5416.3s] expo=180s elev=70.5deg humid= 52% sunelev=-22.1deg (moon at 115.0deg phase=0.53 elev= -7.0 )
Informations from GCN notice:
This is a GRB
Date of the alert : 2457198.45141 2015-06-24T22:50:01.824
Decoded useful notice informations.
RA(J2000.0) : 306.015420354 20h24m03s7
DEC(J2000.0) : 33.846337823 +33d50m46s81
Error radius : 3.2 arcmin

Other pages about TAROT Calern observatory observations

Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=73.1011946119 lat=-2.1028395111
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.494
Assuming Rv=3.1: Av=1.637 Ar=1.320 Ai=0.958
extmap.fit: Extinction map E(B-V) from Schlegel:

Field of View is about 56 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 150624: TAROT Calern observatory optical observations
----------------------------------------------------------------------
Klotz A., Turpin D. (IRAP-CNRS-OMP),
Boer M., Gendre B., Siellez K., Dereli H., Bardho O. (UNS-CNRS-OCA),
Atteia J.L. (IRAP-CNRS-OMP) report:

We imaged the field of GRB 150624 detected by INTEGRAL
(trigger 7130) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 17.9s after the GRB trigger
(14.4s after the notice). The elevation of the field increased from
54 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2015-06-24T22:50:01.824

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+17.9s to t0+77.9s : R > 15.1

The second image is 30.0s exposure in tracking mode:
t0+93.3s to t0+123.3s : R > 16.2

We co-added a series of exposures:
t0+93.3s to t0+386.1s : R > 17.7
---- YES
We detect a new fading source in the error box given by INTEGRAL
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 17.9s 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= 73.1012 lat= -2.1028
and the galactic extinction in R band is 1.3 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.
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