GRB110928_193514_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20110928_194650695_000002_20552401   129 stars filter C [ 1675.1s -  1765.1s] expo= 90s elev=20.7deg humid= 70% sunelev=-26.7deg (moon at  74.0deg phase=0.11 elev=-24.0 )
AL_20110928_194831679_000002_20552401   133 stars filter C [ 1776.1s -  1866.1s] expo= 90s elev=20.5deg humid= 70% sunelev=-27.0deg (moon at  74.0deg phase=0.11 elev=-24.0 )
AL_20110928_195012429_000002_20552401    91 stars filter R [ 1876.8s -  1966.8s] expo= 90s elev=20.3deg humid= 70% sunelev=-27.2deg (moon at  74.0deg phase=0.11 elev=-24.0 )
AL_20110928_195153418_000002_20552401   133 stars filter C [ 1977.8s -  2067.8s] expo= 90s elev=20.2deg humid= 70% sunelev=-27.5deg (moon at  74.0deg phase=0.11 elev=-25.0 )
AL_20110928_195333888_000002_20552401   128 stars filter C [ 2078.3s -  2168.3s] expo= 90s elev=20.0deg humid= 70% sunelev=-27.8deg (moon at  74.0deg phase=0.11 elev=-25.0 )
AL_20110928_195515090_000002_20552401   102 stars filter R [ 2179.5s -  2269.5s] expo= 90s elev=19.8deg humid= 69% sunelev=-28.1deg (moon at  74.0deg phase=0.11 elev=-25.0 )
AL_20110928_195743888_000002_20552501   117 stars filter C [ 2328.3s -  2418.3s] expo= 90s elev=19.6deg humid= 70% sunelev=-28.5deg (moon at  74.0deg phase=0.11 elev=-26.0 )
AL_20110928_195924590_000002_20552501   128 stars filter C [ 2429.0s -  2519.0s] expo= 90s elev=19.4deg humid= 70% sunelev=-28.7deg (moon at  74.0deg phase=0.11 elev=-26.0 )
AL_20110928_200105763_000002_20552501   103 stars filter R [ 2530.2s -  2620.2s] expo= 90s elev=19.2deg humid= 70% sunelev=-29.0deg (moon at  74.0deg phase=0.11 elev=-26.0 )
AL_20110928_200246329_000002_20552501   132 stars filter C [ 2630.7s -  2720.7s] expo= 90s elev=19.1deg humid= 70% sunelev=-29.3deg (moon at  74.0deg phase=0.11 elev=-26.0 )
AL_20110928_200426158_000002_20552501   120 stars filter C [ 2730.5s -  2820.5s] expo= 90s elev=18.9deg humid= 70% sunelev=-29.5deg (moon at  74.0deg phase=0.11 elev=-27.0 )
AL_20110928_200607094_000002_20552501    88 stars filter R [ 2831.5s -  2921.5s] expo= 90s elev=18.7deg humid= 70% sunelev=-29.8deg (moon at  74.0deg phase=0.11 elev=-27.0 )
AL_20110928_201402302_000002_20552601   117 stars filter C [ 3216.7s -  3396.7s] expo=180s elev=17.9deg humid= 69% sunelev=-30.8deg (moon at  74.0deg phase=0.11 elev=-28.0 )
AL_20110928_201712583_000002_20552601   135 stars filter C [ 3407.0s -  3587.0s] expo=180s elev=17.6deg humid= 69% sunelev=-31.3deg (moon at  74.0deg phase=0.11 elev=-29.0 )
AL_20110928_202023303_000002_20552601   115 stars filter R [ 3597.7s -  3777.7s] expo=180s elev=17.2deg humid= 69% sunelev=-31.8deg (moon at  74.0deg phase=0.11 elev=-29.0 )
AL_20110928_202333575_000002_20552601   111 stars filter C [ 3788.0s -  3968.0s] expo=180s elev=16.9deg humid= 69% sunelev=-32.3deg (moon at  74.0deg phase=0.11 elev=-30.0 )
AL_20110928_202644091_000002_20552601   134 stars filter C [ 3978.5s -  4158.5s] expo=180s elev=16.5deg humid= 69% sunelev=-32.7deg (moon at  74.0deg phase=0.11 elev=-30.0 )
AL_20110928_202954606_000002_20552601    99 stars filter R [ 4169.0s -  4349.0s] expo=180s elev=16.1deg humid= 69% sunelev=-33.2deg (moon at  74.0deg phase=0.11 elev=-31.0 )
AL_20110928_203406829_000002_20552701   128 stars filter C [ 4421.2s -  4601.2s] expo=180s elev=15.6deg humid= 69% sunelev=-33.8deg (moon at  74.0deg phase=0.11 elev=-32.0 )
AL_20110928_203717329_000002_20552701   117 stars filter C [ 4611.7s -  4791.7s] expo=180s elev=15.2deg humid= 68% sunelev=-34.3deg (moon at  74.0deg phase=0.11 elev=-32.0 )
AL_20110928_204028064_000002_20552701   109 stars filter R [ 4802.5s -  4982.5s] expo=180s elev=14.8deg humid= 68% sunelev=-34.8deg (moon at  74.0deg phase=0.11 elev=-33.0 )
AL_20110928_204338334_000002_20552701   124 stars filter C [ 4992.7s -  5172.7s] expo=180s elev=14.4deg humid= 68% sunelev=-35.2deg (moon at  74.0deg phase=0.11 elev=-33.0 )
AL_20110928_204649084_000002_20552701   112 stars filter C [ 5183.5s -  5363.5s] expo=180s elev=14.0deg humid= 67% sunelev=-35.7deg (moon at  74.0deg phase=0.11 elev=-34.0 )
AL_20110928_204959788_000002_20552701    98 stars filter R [ 5374.2s -  5554.2s] expo=180s elev=13.6deg humid= 67% sunelev=-36.1deg (moon at  73.0deg phase=0.11 elev=-34.0 )
AL_20110928_205406463_000002_20552801    98 stars filter C [ 5620.9s -  5800.9s] expo=180s elev=13.1deg humid= 67% sunelev=-36.7deg (moon at  73.0deg phase=0.11 elev=-35.0 )
AL_20110928_205717230_000002_20552801   116 stars filter C [ 5811.6s -  5991.6s] expo=180s elev=12.7deg humid= 68% sunelev=-37.1deg (moon at  73.0deg phase=0.11 elev=-36.0 )
AL_20110928_210027746_000002_20552801    84 stars filter R [ 6002.1s -  6182.1s] expo=180s elev=12.3deg humid= 68% sunelev=-37.5deg (moon at  73.0deg phase=0.11 elev=-36.0 )
AL_20110928_210338203_000002_20552801    93 stars filter C [ 6192.6s -  6372.6s] expo=180s elev=11.8deg humid= 69% sunelev=-38.0deg (moon at  73.0deg phase=0.11 elev=-37.0 )
AL_20110928_210648702_000002_20552801    94 stars filter C [ 6383.1s -  6563.1s] expo=180s elev=11.4deg humid= 69% sunelev=-38.4deg (moon at  73.0deg phase=0.11 elev=-37.0 )
AL_20110928_210959218_000002_20552801    63 stars filter R [ 6573.7s -  6753.7s] expo=180s elev=11.0deg humid= 69% sunelev=-38.8deg (moon at  73.0deg phase=0.11 elev=-38.0 )
AL_20110928_211408537_000002_20552901    90 stars filter C [ 6822.6s -  7002.6s] expo=180s elev=10.4deg humid= 70% sunelev=-39.3deg (moon at  73.0deg phase=0.11 elev=-38.0 )
AL_20110928_211718506_000002_20552901    84 stars filter C [ 7012.9s -  7192.9s] expo=180s elev=10.0deg humid= 71% sunelev=-39.7deg (moon at  73.0deg phase=0.11 elev=-39.0 )
AL_20110928_212029208_000002_20552901    55 stars filter R [ 7203.6s -  7383.6s] expo=180s elev= 9.5deg humid= 71% sunelev=-40.1deg (moon at  73.0deg phase=0.11 elev=-39.0 )
AL_20110928_212339479_000002_20552901    75 stars filter C [ 7393.9s -  7573.9s] expo=180s elev= 9.1deg humid= 71% sunelev=-40.5deg (moon at  73.0deg phase=0.11 elev=-40.0 )
AL_20110928_212649978_000002_20552901    71 stars filter C [ 7584.4s -  7764.4s] expo=180s elev= 8.6deg humid= 70% sunelev=-40.9deg (moon at  73.0deg phase=0.11 elev=-41.0 )
AL_20110928_213000745_000002_20552901    30 stars filter R [ 7775.1s -  7955.1s] expo=180s elev= 8.2deg humid= 70% sunelev=-41.2deg (moon at  73.0deg phase=0.11 elev=-41.0 )
AL_20110928_213410657_000002_20553001    58 stars filter C [ 8025.1s -  8205.1s] expo=180s elev= 7.6deg humid= 69% sunelev=-41.7deg (moon at  73.0deg phase=0.11 elev=-42.0 )
AL_20110928_213720922_000002_20553001    46 stars filter C [ 8215.3s -  8395.3s] expo=180s elev= 7.1deg humid= 69% sunelev=-42.1deg (moon at  73.0deg phase=0.12 elev=-42.0 )
AL_20110928_214031642_000002_20553001    26 stars filter R [ 8406.1s -  8586.1s] expo=180s elev= 6.7deg humid= 69% sunelev=-42.4deg (moon at  73.0deg phase=0.12 elev=-43.0 )
AL_20110928_214341952_000002_20553001    28 stars filter C [ 8596.3s -  8776.3s] expo=180s elev= 6.2deg humid= 69% sunelev=-42.7deg (moon at  73.0deg phase=0.12 elev=-43.0 )
AL_20110928_214652420_000002_20553001    27 stars filter C [ 8786.8s -  8966.8s] expo=180s elev= 5.7deg humid= 69% sunelev=-43.1deg (moon at  73.0deg phase=0.12 elev=-44.0 )
AL_20110928_215002937_000002_20553001    13 stars filter R [ 8977.3s -  9157.3s] expo=180s elev= 5.2deg humid= 70% sunelev=-43.4deg (moon at  73.0deg phase=0.12 elev=-44.0 )
AL_20110928_215414914_000002_20553101    12 stars filter C [ 9229.3s -  9409.3s] expo=180s elev= 4.6deg humid= 69% sunelev=-43.8deg (moon at  73.0deg phase=0.12 elev=-45.0 )
AL_20110928_215725414_000002_20553101    18 stars filter C [ 9419.8s -  9599.8s] expo=180s elev= 4.2deg humid= 69% sunelev=-44.1deg (moon at  73.0deg phase=0.12 elev=-45.0 )
AL_20110928_220035695_000002_20553101     8 stars filter R [ 9610.1s -  9790.1s] expo=180s elev= 3.7deg humid= 69% sunelev=-44.4deg (moon at  73.0deg phase=0.12 elev=-46.0 )
AL_20110928_220346216_000002_20553101    11 stars filter C [ 9800.6s -  9980.6s] expo=180s elev= 3.2deg humid= 69% sunelev=-44.7deg (moon at  73.0deg phase=0.12 elev=-46.0 )
AL_20110928_220656951_000002_20553101     8 stars filter C [ 9991.4s - 10171.4s] expo=180s elev= 2.7deg humid= 69% sunelev=-44.9deg (moon at  73.0deg phase=0.12 elev=-47.0 )
AL_20110928_221007434_000002_20553101     0 star  filter R [10181.9s - 10361.9s] expo=180s elev= 2.3deg humid= 69% sunelev=-45.2deg (moon at  73.0deg phase=0.12 elev=-47.0 )
AL_20110928_221417346_000002_20553201     0 star  filter C [10431.8s - 10611.8s] expo=180s elev= 1.7deg humid= 70% sunelev=-45.5deg (moon at  72.0deg phase=0.12 elev=-48.0 )
AL_20110928_221728081_000002_20553201     0 star  filter C [10622.5s - 10802.5s] expo=180s elev= 1.2deg humid= 70% sunelev=-45.8deg (moon at  72.0deg phase=0.12 elev=-48.0 )
AL_20110928_222038580_000002_20553201     0 star  filter R [10813.0s - 10993.0s] expo=180s elev= 0.7deg humid= 70% sunelev=-46.0deg (moon at  72.0deg phase=0.12 elev=-49.0 )
AL_20110928_222659601_000002_20553201     0 star  filter C [11194.0s - 11374.0s] expo=180s elev=-0.1deg humid= 70% sunelev=-46.4deg (moon at  72.0deg phase=0.12 elev=-50.0 )
AL_20110928_223010116_000002_20553201     0 star  filter R [11384.5s - 11564.5s] expo=180s elev=-1.2deg humid= 70% sunelev=-46.6deg (moon at  72.0deg phase=0.12 elev=-50.0 )
Informations from GCN notice:
This is a GRB
Date of GRB : 2455833.3037104169 2011-09-28T19:17:20.580
Date of notice : 2455833.3161458331 2011-09-28T19:35:14.999
Refined position : yes (error radius=324.0 arcsec)
RA(J2000.0) : 278.930200 18h35m43s2
DEC(J2000.0) : -19.321300 -19d19m16s68
Error box : x=-13:184 y=-26:170 (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=13.946609 lat=-5.375071
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.961
Assuming Rv=3.1: Av=3.186 Ar=2.569 Ai=1.864
extmap.fit: Extinction map E(B-V) from Schlegel:

Field of View is about 58 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 110928: TAROT Calern observatory optical observations
----------------------------------------------------------------------
Klotz A. (CESR-OMP), Gendre B. (ASDC),
Boer M. (OHP-OAMP), Atteia J.L. (LATT-OMP) report:

We imaged the field of GRB 110928 detected by SWIFT
(trigger 504307) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 1675.1s after the GRB trigger
(600.7s after the notice). The elevation of the field decreased from
20 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2011-09-28T19:17:20.544

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+1675.1s to t0+1765.1s : R > 15.1

The second image is 90.0s exposure in tracking mode:
t0+1776.1s to t0+1866.1s : R > 16.2

We co-added a series of exposures:
t0+1776.1s to t0+2418.3s : 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 1675.1s 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= 13.9466 lat= -5.3751
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.
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