GRB140512_598819_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20140512_225540868_000003_13281201     0 star  filter C [71492710.9s - 71492890.9s] expo=180s elev= 4.5deg humid= 52% sunelev=-27.5deg (moon at  80.0deg phase=0.87 elev=+32.0 )
AL_20140512_225851900_000003_13281201     0 star  filter C [71492901.9s - 71493081.9s] expo=180s elev= 5.0deg humid= 52% sunelev=-27.6deg (moon at  80.0deg phase=0.87 elev=+32.0 )
AL_20140512_230203290_000003_13281201     0 star  filter R [71493093.3s - 71493273.3s] expo=180s elev= 5.5deg humid= 50% sunelev=-27.7deg (moon at  80.0deg phase=0.87 elev=+32.0 )
AL_20140512_230527998_000003_13281301     8 stars filter C [71493298.0s - 71493478.0s] expo=180s elev= 6.1deg humid= 50% sunelev=-27.7deg (moon at  80.0deg phase=0.87 elev=+32.0 )
AL_20140512_230838967_000003_13281301    11 stars filter C [71493489.0s - 71493669.0s] expo=180s elev= 6.6deg humid= 51% sunelev=-27.8deg (moon at  80.0deg phase=0.87 elev=+32.0 )
AL_20140512_231150139_000003_13281301    20 stars filter R [71493680.2s - 71493860.2s] expo=180s elev= 7.1deg humid= 51% sunelev=-27.8deg (moon at  80.0deg phase=0.87 elev=+31.0 )
AL_20140512_231512265_000003_13281401     0 star  filter C [71493882.3s - 71494062.3s] expo=180s elev= 7.6deg humid= 52% sunelev=-27.9deg (moon at  80.0deg phase=0.87 elev=+31.0 )
AL_20140512_231823015_000003_13281401    25 stars filter C [71494073.1s - 71494253.1s] expo=180s elev= 8.1deg humid= 52% sunelev=-27.9deg (moon at  80.0deg phase=0.87 elev=+31.0 )
AL_20140512_232134484_000003_13281401    18 stars filter R [71494264.5s - 71494444.5s] expo=180s elev= 8.6deg humid= 51% sunelev=-28.0deg (moon at  80.0deg phase=0.87 elev=+31.0 )
AL_20140512_232455658_000003_13281501    23 stars filter C [71494465.7s - 71494645.7s] expo=180s elev= 9.1deg humid= 52% sunelev=-28.0deg (moon at  80.0deg phase=0.87 elev=+31.0 )
AL_20140512_232806580_000003_13281501    39 stars filter C [71494656.7s - 71494836.7s] expo=180s elev= 9.6deg humid= 52% sunelev=-28.0deg (moon at  80.0deg phase=0.87 elev=+30.0 )
AL_20140512_233118096_000003_13281501    26 stars filter R [71494848.1s - 71495028.1s] expo=180s elev=10.1deg humid= 52% sunelev=-28.0deg (moon at  80.0deg phase=0.87 elev=+30.0 )
AL_20140512_233439510_000003_13281601    36 stars filter C [71495049.5s - 71495229.5s] expo=180s elev=10.6deg humid= 51% sunelev=-28.0deg (moon at  80.0deg phase=0.87 elev=+30.0 )
AL_20140512_233750260_000003_13281601    33 stars filter C [71495240.3s - 71495420.3s] expo=180s elev=11.1deg humid= 52% sunelev=-28.0deg (moon at  80.0deg phase=0.87 elev=+29.0 )
AL_20140512_234100994_000003_13281601    33 stars filter R [71495431.0s - 71495611.0s] expo=180s elev=11.5deg humid= 52% sunelev=-28.0deg (moon at  80.0deg phase=0.87 elev=+29.0 )
AL_20140512_234423369_000003_13281701    44 stars filter C [71495633.4s - 71495813.4s] expo=180s elev=12.0deg humid= 53% sunelev=-27.9deg (moon at  79.0deg phase=0.87 elev=+29.0 )
AL_20140512_234735494_000003_13281701    43 stars filter C [71495825.5s - 71496005.5s] expo=180s elev=12.5deg humid= 53% sunelev=-27.9deg (moon at  79.0deg phase=0.87 elev=+29.0 )
AL_20140512_235046228_000003_13281701    38 stars filter R [71496016.3s - 71496196.3s] expo=180s elev=13.0deg humid= 53% sunelev=-27.8deg (moon at  79.0deg phase=0.87 elev=+28.0 )
AL_20140513_000738408_000003_13281801    55 stars filter C [71497028.4s - 71497208.4s] expo=180s elev=15.4deg humid= 54% sunelev=-27.4deg (moon at  79.0deg phase=0.87 elev=+27.0 )
AL_20140513_001049830_000003_13281801    43 stars filter R [71497219.9s - 71497399.9s] expo=180s elev=15.8deg humid= 53% sunelev=-27.3deg (moon at  79.0deg phase=0.87 elev=+26.0 )
AL_20140513_001400799_000003_13281801    42 stars filter V [71497410.8s - 71497590.8s] expo=180s elev=16.3deg humid= 53% sunelev=-27.2deg (moon at  79.0deg phase=0.87 elev=+26.0 )
AL_20140513_003215477_000003_13281901    65 stars filter C [71498505.5s - 71498685.5s] expo=180s elev=18.7deg humid= 54% sunelev=-26.4deg (moon at  79.0deg phase=0.87 elev=+24.0 )
AL_20140513_003526715_000003_13281901    50 stars filter R [71498696.7s - 71498876.7s] expo=180s elev=19.1deg humid= 54% sunelev=-26.2deg (moon at  79.0deg phase=0.87 elev=+23.0 )
AL_20140513_003837715_000003_13281901    45 stars filter V [71498887.7s - 71499067.7s] expo=180s elev=19.5deg humid= 54% sunelev=-26.1deg (moon at  79.0deg phase=0.87 elev=+23.0 )
AL_20140513_005638943_000003_13282001    67 stars filter C [71499969.0s - 71500149.0s] expo=180s elev=21.7deg humid= 55% sunelev=-24.9deg (moon at  79.0deg phase=0.87 elev=+21.0 )
AL_20140513_005949911_000003_13282001    60 stars filter R [71500160.0s - 71500340.0s] expo=180s elev=22.0deg humid= 55% sunelev=-24.7deg (moon at  79.0deg phase=0.88 elev=+20.0 )
AL_20140513_010301396_000003_13282001    49 stars filter V [71500351.4s - 71500531.4s] expo=180s elev=22.4deg humid= 55% sunelev=-24.5deg (moon at  79.0deg phase=0.88 elev=+20.0 )
AL_20140513_012106189_000003_13282101    55 stars filter C [71501436.3s - 71501616.3s] expo=180s elev=24.3deg humid= 56% sunelev=-23.0deg (moon at  79.0deg phase=0.88 elev=+17.0 )
AL_20140513_012416751_000003_13282101    60 stars filter R [71501626.8s - 71501806.8s] expo=180s elev=24.6deg humid= 56% sunelev=-22.8deg (moon at  79.0deg phase=0.88 elev=+17.0 )
AL_20140513_012727519_000003_13282101    53 stars filter V [71501817.5s - 71501997.5s] expo=180s elev=25.0deg humid= 55% sunelev=-22.5deg (moon at  79.0deg phase=0.88 elev=+17.0 )
AL_20140513_014533585_000003_13282201    61 stars filter C [71502903.6s - 71503083.6s] expo=180s elev=26.6deg humid= 54% sunelev=-20.7deg (moon at  79.0deg phase=0.88 elev=+14.0 )
AL_20140513_014844074_000003_13282201    69 stars filter R [71503094.1s - 71503274.1s] expo=180s elev=26.9deg humid= 55% sunelev=-20.4deg (moon at  79.0deg phase=0.88 elev=+13.0 )
AL_20140513_015154621_000003_13282201    60 stars filter V [71503284.7s - 71503464.7s] expo=180s elev=27.1deg humid= 55% sunelev=-20.1deg (moon at  79.0deg phase=0.88 elev=+13.0 )
AL_20140513_021002066_000003_13282301    57 stars filter C [71504372.1s - 71504552.1s] expo=180s elev=28.5deg humid= 53% sunelev=-18.1deg (moon at  78.0deg phase=0.88 elev=+10.0 )
AL_20140513_021312848_000003_13282301    76 stars filter R [71504562.9s - 71504742.9s] expo=180s elev=28.7deg humid= 53% sunelev=-17.7deg (moon at  78.0deg phase=0.88 elev=+10.0 )
AL_20140513_021623582_000003_13282301    54 stars filter V [71504753.6s - 71504933.6s] expo=180s elev=28.9deg humid= 54% sunelev=-17.3deg (moon at  78.0deg phase=0.88 elev= +9.0 )
AL_20140513_023431826_000003_13282401    69 stars filter C [71505841.9s - 71506021.9s] expo=180s elev=29.9deg humid= 53% sunelev=-15.1deg (moon at  78.0deg phase=0.88 elev= +6.0 )
AL_20140513_023742814_000003_13282401    75 stars filter R [71506032.9s - 71506212.9s] expo=180s elev=30.0deg humid= 51% sunelev=-14.7deg (moon at  78.0deg phase=0.88 elev= +6.0 )
AL_20140513_024053564_000003_13282401    57 stars filter V [71506223.6s - 71506403.6s] expo=180s elev=30.2deg humid= 51% sunelev=-14.3deg (moon at  78.0deg phase=0.88 elev= +5.0 )
AL_20140513_025902417_000003_13282501    60 stars filter C [71507312.5s - 71507492.5s] expo=180s elev=30.8deg humid= 51% sunelev=-11.8deg (moon at  78.0deg phase=0.88 elev= +2.0 )
AL_20140513_030214292_000003_13282501    71 stars filter R [71507504.4s - 71507684.4s] expo=180s elev=30.9deg humid= 50% sunelev=-11.4deg (moon at  78.0deg phase=0.88 elev= +2.0 )
AL_20140513_030524870_000003_13282501    45 stars filter V [71507694.9s - 71507874.9s] expo=180s elev=31.0deg humid= 50% sunelev=-10.9deg (moon at  78.0deg phase=0.88 elev= +1.0 )
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=71470:71579 y=-126607:-126498 (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=22.1932697771 lat=-12.4876055675
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.972
Assuming Rv=3.1: Av=3.222 Ar=2.598 Ai=1.886 Extinction map E(B-V) from Schlegel:

Field of View is about 62 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 140512: 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 140512 detected by SWIFT
(trigger 513505) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 71492710.9s after the GRB trigger
(71492689.8s after the notice). The elevation of the field increased from
4 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 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+71492710.9s to t0+71492890.9s : R > 15.1

The second image is 180.0s exposure in tracking mode:
t0+71492901.9s to t0+71493081.9s : R > 16.2

We co-added a series of exposures:
t0+71492901.9s to t0+71494062.3s : 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 71492710.9s 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= 22.1933 lat=-12.4876
and the galactic extinction in R band is 2.6 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.