GRB150624_005306_INTEGRAL at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20150624_005610266_000003_46696601    60 stars filter C [  117.5s -   177.5s] expo= 60s elev=75.7deg humid= 77% sunelev=-20.3deg (moon at 121.0deg phase=0.47 elev=-18.0 )
AL_20150624_005651485_000003_46696601    53 stars filter C [  190.8s -   220.8s] expo= 30s elev=75.8deg humid= 76% sunelev=-20.2deg (moon at 121.0deg phase=0.47 elev=-18.0 )
AL_20150624_005732688_000003_46696601    60 stars filter C [  232.0s -   262.0s] expo= 30s elev=75.9deg humid= 76% sunelev=-20.2deg (moon at 121.0deg phase=0.47 elev=-18.0 )
AL_20150624_005818735_000003_46696601    58 stars filter C [  278.1s -   308.1s] expo= 30s elev=76.0deg humid= 76% sunelev=-20.1deg (moon at 121.0deg phase=0.47 elev=-18.0 )
AL_20150624_005900610_000003_46696601    53 stars filter C [  319.8s -   349.8s] expo= 30s elev=76.1deg humid= 76% sunelev=-20.1deg (moon at 121.0deg phase=0.47 elev=-19.0 )
AL_20150624_005941407_000003_46696601    59 stars filter C [  360.8s -   390.8s] expo= 30s elev=76.2deg humid= 76% sunelev=-20.0deg (moon at 121.0deg phase=0.47 elev=-19.0 )
AL_20150624_010030735_000003_46696701     0 star  filter C [  408.3s -   498.3s] expo= 90s elev=76.4deg humid= 76% sunelev=-20.0deg (moon at 121.0deg phase=0.47 elev=-19.0 )
AL_20150624_010643423_000003_46696801    69 stars filter C [  722.7s -   812.7s] expo= 90s elev=77.0deg humid= 77% sunelev=-19.6deg (moon at 121.0deg phase=0.47 elev=-20.0 )
AL_20150624_010824595_000003_46696801    66 stars filter C [  824.0s -   914.0s] expo= 90s elev=77.2deg humid= 77% sunelev=-19.5deg (moon at 121.0deg phase=0.47 elev=-20.0 )
AL_20150624_011005829_000003_46696801    68 stars filter C [  925.2s -  1015.2s] expo= 90s elev=77.5deg humid= 76% sunelev=-19.4deg (moon at 121.0deg phase=0.47 elev=-20.0 )
AL_20150624_011154189_000003_46696901    68 stars filter C [ 1033.6s -  1123.6s] expo= 90s elev=77.7deg humid= 75% sunelev=-19.3deg (moon at 121.0deg phase=0.47 elev=-21.0 )
AL_20150624_011335426_000003_46696901    66 stars filter C [ 1134.8s -  1224.8s] expo= 90s elev=77.9deg humid= 75% sunelev=-19.1deg (moon at 121.0deg phase=0.47 elev=-21.0 )
AL_20150624_011516426_000003_46696901    72 stars filter C [ 1235.8s -  1325.8s] expo= 90s elev=78.1deg humid= 75% sunelev=-19.0deg (moon at 121.0deg phase=0.47 elev=-21.0 )
AL_20150624_011708582_000003_46697001    69 stars filter C [ 1347.9s -  1437.9s] expo= 90s elev=78.3deg humid= 74% sunelev=-18.9deg (moon at 121.0deg phase=0.47 elev=-22.0 )
AL_20150624_011849957_000003_46697001    69 stars filter C [ 1449.3s -  1539.3s] expo= 90s elev=78.4deg humid= 75% sunelev=-18.7deg (moon at 121.0deg phase=0.47 elev=-22.0 )
AL_20150624_012031160_000003_46697001    66 stars filter C [ 1550.5s -  1640.5s] expo= 90s elev=78.6deg humid= 75% sunelev=-18.6deg (moon at 121.0deg phase=0.47 elev=-22.0 )
AL_20150624_012456906_000003_46697101    76 stars filter C [ 1726.2s -  1906.2s] expo=180s elev=78.9deg humid= 75% sunelev=-18.4deg (moon at 121.0deg phase=0.47 elev=-23.0 )
AL_20150624_012808078_000003_46697101    76 stars filter C [ 1917.4s -  2097.4s] expo=180s elev=79.2deg humid= 75% sunelev=-18.1deg (moon at 121.0deg phase=0.47 elev=-23.0 )
AL_20150624_013119109_000003_46697101    67 stars filter R [ 2108.4s -  2288.4s] expo=180s elev=79.5deg humid= 75% sunelev=-17.9deg (moon at 121.0deg phase=0.47 elev=-24.0 )
AL_20150624_013440995_000003_46697201    70 stars filter C [ 2310.3s -  2490.3s] expo=180s elev=79.7deg humid= 74% sunelev=-17.6deg (moon at 121.0deg phase=0.47 elev=-24.0 )
AL_20150624_013751713_000003_46697201    71 stars filter C [ 2501.1s -  2681.1s] expo=180s elev=79.8deg humid= 73% sunelev=-17.3deg (moon at 121.0deg phase=0.47 elev=-25.0 )
AL_20150624_014103151_000003_46697201    60 stars filter R [ 2692.5s -  2872.5s] expo=180s elev=80.0deg humid= 72% sunelev=-17.0deg (moon at 121.0deg phase=0.48 elev=-25.0 )
AL_20150624_014424574_000003_46697301    79 stars filter C [ 2893.9s -  3073.9s] expo=180s elev=80.1deg humid= 71% sunelev=-16.7deg (moon at 121.0deg phase=0.48 elev=-26.0 )
AL_20150624_014735324_000003_46697301    76 stars filter C [ 3084.7s -  3264.7s] expo=180s elev=80.1deg humid= 70% sunelev=-16.4deg (moon at 121.0deg phase=0.48 elev=-26.0 )
AL_20150624_015045855_000003_46697301    53 stars filter R [ 3275.2s -  3455.2s] expo=180s elev=80.2deg humid= 70% sunelev=-16.1deg (moon at 121.0deg phase=0.48 elev=-27.0 )
AL_20150624_015408393_000003_46697401    76 stars filter C [ 3477.8s -  3657.8s] expo=180s elev=80.1deg humid= 69% sunelev=-15.8deg (moon at 121.0deg phase=0.48 elev=-27.0 )
AL_20150624_015719143_000003_46697401    71 stars filter C [ 3668.5s -  3848.5s] expo=180s elev=80.1deg humid= 70% sunelev=-15.5deg (moon at 121.0deg phase=0.48 elev=-28.0 )
AL_20150624_020029924_000003_46697401    59 stars filter R [ 3859.3s -  4039.3s] expo=180s elev=80.0deg humid= 70% sunelev=-15.2deg (moon at 121.0deg phase=0.48 elev=-28.0 )
AL_20150624_020400846_000003_46697501    69 stars filter C [ 4070.2s -  4250.2s] expo=180s elev=79.8deg humid= 70% sunelev=-14.8deg (moon at 121.0deg phase=0.48 elev=-29.0 )
AL_20150624_020711618_000003_46697501    66 stars filter C [ 4260.9s -  4440.9s] expo=180s elev=79.7deg humid= 73% sunelev=-14.5deg (moon at 121.0deg phase=0.48 elev=-29.0 )
AL_20150624_021022087_000003_46697501    61 stars filter R [ 4451.5s -  4631.5s] expo=180s elev=79.5deg humid= 71% sunelev=-14.2deg (moon at 121.0deg phase=0.48 elev=-30.0 )
AL_20150624_021339337_000003_46697601    66 stars filter C [ 4648.7s -  4828.7s] expo=180s elev=79.2deg humid= 71% sunelev=-13.8deg (moon at 121.0deg phase=0.48 elev=-30.0 )
AL_20150624_021650353_000003_46697601    69 stars filter C [ 4839.7s -  5019.7s] expo=180s elev=78.9deg humid= 70% sunelev=-13.5deg (moon at 121.0deg phase=0.48 elev=-31.0 )
AL_20150624_022001321_000003_46697601    56 stars filter R [ 5030.7s -  5210.7s] expo=180s elev=78.6deg humid= 71% sunelev=-13.1deg (moon at 121.0deg phase=0.48 elev=-31.0 )
AL_20150624_022320384_000003_46697701    58 stars filter C [ 5229.8s -  5409.8s] expo=180s elev=78.3deg humid= 71% sunelev=-12.7deg (moon at 121.0deg phase=0.48 elev=-32.0 )
AL_20150624_022631179_000003_46697701    64 stars filter C [ 5420.5s -  5600.5s] expo=180s elev=78.0deg humid= 71% sunelev=-12.4deg (moon at 121.0deg phase=0.48 elev=-32.0 )
AL_20150624_022942585_000003_46697701    51 stars filter R [ 5612.0s -  5792.0s] expo=180s elev=77.6deg humid= 71% sunelev=-12.0deg (moon at 121.0deg phase=0.48 elev=-33.0 )
AL_20150624_023313460_000003_46697801    56 stars filter C [ 5822.9s -  6002.9s] expo=180s elev=77.2deg humid= 70% sunelev=-11.6deg (moon at 121.0deg phase=0.48 elev=-33.0 )
AL_20150624_023624988_000003_46697801    54 stars filter C [ 6014.3s -  6194.3s] expo=180s elev=76.8deg humid= 70% sunelev=-11.2deg (moon at 121.0deg phase=0.48 elev=-33.0 )
AL_20150624_023935738_000003_46697801    48 stars filter R [ 6205.1s -  6385.1s] expo=180s elev=76.3deg humid= 69% sunelev=-10.8deg (moon at 121.0deg phase=0.48 elev=-34.0 )
AL_20150624_024252488_000003_46697901    44 stars filter C [ 6401.9s -  6581.9s] expo=180s elev=75.9deg humid= 70% sunelev=-10.4deg (moon at 121.0deg phase=0.48 elev=-34.0 )
AL_20150624_024603001_000003_46697901    35 stars filter C [ 6592.4s -  6772.4s] expo=180s elev=75.4deg humid= 70% sunelev=-10.0deg (moon at 121.0deg phase=0.48 elev=-35.0 )
AL_20150624_024914454_000003_46697901    36 stars filter R [ 6783.8s -  6963.8s] expo=180s elev=75.0deg humid= 69% sunelev=-9.6deg (moon at 121.0deg phase=0.48 elev=-35.0 )
Informations from GCN notice:
This is a GRB
Date of the alert : 2457197.53687 2015-06-24T00:53:05.568
Decoded useful notice informations.
RA(J2000.0) : 306.014277533 20h24m03s4
DEC(J2000.0) : 33.8645474122 +33d51m52s37
Error radius : 2.5 arcmin
Error box : x=3:96 y=23:115 (pixels)

Other pages about TAROT Calern observatory observations

Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=73.1043006873 lat=-2.08339436943
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 7114) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 117.5s after the GRB trigger
(114.1s after the notice). The elevation of the field increased from
75 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2015-06-24T00:53:05.568

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+117.5s to t0+177.5s : R > 15.1

The second image is 30.0s exposure in tracking mode:
t0+190.8s to t0+220.8s : R > 16.2

We co-added a series of exposures:
t0+190.8s to t0+498.3s : 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 117.5s 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= 73.1043 lat= -2.0834
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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