GRB130502_554996_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20130502_193412472_000002_78404301    11 stars filter C [39080622.5s - 39080802.5s] expo=180s elev=41.8deg humid= 92% sunelev=-9.8deg (moon at 168.0deg phase=0.47 elev=-51.0 )
AL_20130502_193723426_000002_78404301    13 stars filter C [39080813.4s - 39080993.4s] expo=180s elev=41.5deg humid= 92% sunelev=-10.3deg (moon at 168.0deg phase=0.47 elev=-51.0 )
AL_20130502_194034379_000002_78404301    14 stars filter R [39081004.4s - 39081184.4s] expo=180s elev=41.2deg humid= 92% sunelev=-10.7deg (moon at 168.0deg phase=0.47 elev=-51.0 )
AL_20130502_194357852_000002_78404401    17 stars filter C [39081207.9s - 39081387.9s] expo=180s elev=40.9deg humid= 92% sunelev=-11.2deg (moon at 168.0deg phase=0.47 elev=-50.0 )
AL_20130502_194709305_000002_78404401    17 stars filter C [39081399.4s - 39081579.4s] expo=180s elev=40.5deg humid= 92% sunelev=-11.7deg (moon at 168.0deg phase=0.47 elev=-50.0 )
AL_20130502_195020540_000002_78404401    15 stars filter R [39081590.6s - 39081770.6s] expo=180s elev=40.2deg humid= 92% sunelev=-12.2deg (moon at 168.0deg phase=0.47 elev=-50.0 )
AL_20130502_195342230_000002_78404501    19 stars filter C [39081792.2s - 39081972.2s] expo=180s elev=39.9deg humid= 92% sunelev=-12.7deg (moon at 168.0deg phase=0.47 elev=-49.0 )
AL_20130502_195653417_000002_78404501    15 stars filter C [39081983.4s - 39082163.4s] expo=180s elev=39.5deg humid= 93% sunelev=-13.1deg (moon at 168.0deg phase=0.47 elev=-49.0 )
AL_20130502_200005042_000002_78404501     7 stars filter R [39082175.1s - 39082355.1s] expo=180s elev=39.2deg humid= 93% sunelev=-13.6deg (moon at 168.0deg phase=0.47 elev=-48.0 )
AL_20130502_200326450_000002_78404601     5 stars filter C [39082376.5s - 39082556.5s] expo=180s elev=38.8deg humid= 93% sunelev=-14.1deg (moon at 168.0deg phase=0.47 elev=-48.0 )
AL_20130502_200637434_000002_78404601     8 stars filter C [39082567.5s - 39082747.5s] expo=180s elev=38.4deg humid= 93% sunelev=-14.5deg (moon at 168.0deg phase=0.47 elev=-47.0 )
AL_20130502_200949138_000002_78404601    11 stars filter R [39082759.2s - 39082939.2s] expo=180s elev=38.0deg humid= 92% sunelev=-14.9deg (moon at 168.0deg phase=0.47 elev=-47.0 )
AL_20130502_201318661_000002_78404701    15 stars filter C [39082968.7s - 39083148.7s] expo=180s elev=37.6deg humid= 93% sunelev=-15.4deg (moon at 168.0deg phase=0.47 elev=-47.0 )
AL_20130502_201629880_000002_78404701    19 stars filter C [39083159.9s - 39083339.9s] expo=180s elev=37.2deg humid= 93% sunelev=-15.9deg (moon at 168.0deg phase=0.47 elev=-46.0 )
AL_20130502_201941114_000002_78404701    17 stars filter R [39083351.1s - 39083531.1s] expo=180s elev=36.8deg humid= 93% sunelev=-16.3deg (moon at 168.0deg phase=0.47 elev=-46.0 )
AL_20130502_202257444_000002_78404801    21 stars filter C [39083547.4s - 39083727.4s] expo=180s elev=36.4deg humid= 92% sunelev=-16.7deg (moon at 168.0deg phase=0.47 elev=-45.0 )
AL_20130502_202608397_000002_78404801    20 stars filter C [39083738.4s - 39083918.4s] expo=180s elev=36.0deg humid= 92% sunelev=-17.2deg (moon at 168.0deg phase=0.47 elev=-45.0 )
AL_20130502_202919553_000002_78404801    15 stars filter R [39083929.6s - 39084109.6s] expo=180s elev=35.6deg humid= 92% sunelev=-17.6deg (moon at 168.0deg phase=0.47 elev=-44.0 )
AL_20130502_203237506_000002_78404901    21 stars filter C [39084127.6s - 39084307.6s] expo=180s elev=35.2deg humid= 92% sunelev=-18.0deg (moon at 168.0deg phase=0.47 elev=-44.0 )
AL_20130502_203548303_000002_78404901    20 stars filter C [39084318.3s - 39084498.3s] expo=180s elev=34.7deg humid= 92% sunelev=-18.4deg (moon at 168.0deg phase=0.47 elev=-43.0 )
AL_20130502_203859271_000002_78404901    17 stars filter R [39084509.3s - 39084689.3s] expo=180s elev=34.3deg humid= 92% sunelev=-18.8deg (moon at 168.0deg phase=0.47 elev=-43.0 )
AL_20130502_204222240_000002_78405001    20 stars filter C [39084712.3s - 39084892.3s] expo=180s elev=33.8deg humid= 92% sunelev=-19.2deg (moon at 168.0deg phase=0.47 elev=-42.0 )
AL_20130502_204533025_000002_78405001    19 stars filter C [39084903.1s - 39085083.1s] expo=180s elev=33.4deg humid= 93% sunelev=-19.6deg (moon at 168.0deg phase=0.47 elev=-42.0 )
AL_20130502_204843759_000002_78405001    17 stars filter R [39085093.8s - 39085273.8s] expo=180s elev=33.0deg humid= 93% sunelev=-20.0deg (moon at 168.0deg phase=0.47 elev=-42.0 )
AL_20130502_205205853_000002_78405101    20 stars filter C [39085295.9s - 39085475.9s] expo=180s elev=32.5deg humid= 93% sunelev=-20.4deg (moon at 168.0deg phase=0.47 elev=-41.0 )
AL_20130502_205517293_000002_78405101    20 stars filter C [39085487.4s - 39085667.4s] expo=180s elev=32.0deg humid= 93% sunelev=-20.8deg (moon at 168.0deg phase=0.47 elev=-41.0 )
AL_20130502_205828762_000002_78405101    19 stars filter R [39085678.8s - 39085858.8s] expo=180s elev=31.6deg humid= 93% sunelev=-21.2deg (moon at 168.0deg phase=0.47 elev=-40.0 )
AL_20130502_210149950_000002_78405201    17 stars filter C [39085880.0s - 39086060.0s] expo=180s elev=31.1deg humid= 93% sunelev=-21.5deg (moon at 168.0deg phase=0.47 elev=-40.0 )
AL_20130502_210501172_000002_78405201    20 stars filter C [39086071.2s - 39086251.2s] expo=180s elev=30.6deg humid= 93% sunelev=-21.9deg (moon at 168.0deg phase=0.47 elev=-39.0 )
AL_20130502_210812094_000002_78405201    15 stars filter R [39086262.2s - 39086442.2s] expo=180s elev=30.1deg humid= 94% sunelev=-22.3deg (moon at 168.0deg phase=0.47 elev=-39.0 )
AL_20130502_211134000_000002_78405301    10 stars filter C [39086464.0s - 39086644.0s] expo=180s elev=29.6deg humid= 94% sunelev=-22.6deg (moon at 168.0deg phase=0.47 elev=-38.0 )
AL_20130502_211445018_000002_78405301     1 star  filter C [39086655.0s - 39086835.0s] expo=180s elev=29.1deg humid= 94% sunelev=-23.0deg (moon at 168.0deg phase=0.47 elev=-37.0 )
AL_20130502_211755487_000002_78405301     0 star  filter R [39086845.5s - 39087025.5s] expo=180s elev=28.6deg humid= 93% sunelev=-23.3deg (moon at 168.0deg phase=0.47 elev=-37.0 )
AL_20130502_211826096_000002_78405401     0 star  filter C [39087047.9s - 39087227.9s] expo=180s elev=28.1deg humid= 93% sunelev=-23.6deg (moon at 168.0deg phase=0.47 elev=-36.0 )
AL_20130502_234149622_000002_78406301     0 star  filter C [39095479.6s - 39095659.6s] expo=180s elev= 4.2deg humid= 94% sunelev=-30.6deg (moon at 168.0deg phase=0.46 elev=-12.0 )
AL_20130502_234500765_000002_78406301     0 star  filter R [39095670.8s - 39095850.8s] expo=180s elev= 3.6deg humid= 93% sunelev=-30.6deg (moon at 168.0deg phase=0.46 elev=-12.0 )
AL_20130502_234811531_000002_78406301     0 star  filter V [39095861.6s - 39096041.6s] expo=180s elev= 3.1deg humid= 93% sunelev=-30.5deg (moon at 168.0deg phase=0.46 elev=-11.0 )
Informations from GCN notice:
This is not a GRB (a retractation has been edited)
Date of GRB : 2455962.9912571758 2012-02-05T11:47:24.619
Date of notice : 2455962.9915046296 2012-02-05T11:47:45.999
Refined position : no
RA(J2000.0) : 40.100000 02h40m24s0
DEC(J2000.0) : 61.220000 +61d13m12s00
Error box : x=-388207:-388097 y=-708835:-708725 (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=231.226884 lat=31.227473
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.026
Assuming Rv=3.1: Av=0.086 Ar=0.069 Ai=0.050 Extinction map E(B-V) from Schlegel:

Field of View is about 79 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 130502: TAROT Calern observatory optical observations
Klotz A. (IRAP-CNRS-OMP), Gendre B. (ASDC/INAF-OAR),
Boer M. (UNS-CNRS-OCA), Atteia J.L. (IRAP-CNRS-OMP) report:

We imaged the field of GRB 130502 detected by SWIFT
(trigger 513505) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 39080622.5s after the GRB trigger
(39080601.3s after the notice). The elevation of the field decreased from
41 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+39080622.5s to t0+39080802.5s : R > 15.1

The second image is 180.0s exposure in tracking mode:
t0+39080813.4s to t0+39080993.4s : R > 16.2

We co-added a series of exposures:
t0+39080813.4s to t0+39081972.2s : 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 39080622.5s 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=231.2269 lat=+31.2275
and the galactic extinction in R band is 0.1 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.