GRB 110213A
GCN Circular 11705
Subject
GRB 110213A: Swift detection of a burst with optical afterglow
Date
2011-02-13T05:33:13Z (14 years ago)
From
David Palmer at LANL <palmer@lanl.gov>
V. D'Elia (ASDC), N. Gehrels (NASA/GSFC), J. M. Gelbord (PSU),
S. T. Holland (CRESST/USRA/GSFC), H. A. Krimm (CRESST/GSFC/USRA),
C. B. Markwardt (NASA/GSFC), D. M. Palmer (LANL), M. H. Siegel (PSU),
E. Sonbas (GSFC/USRA/Adiyaman Univ.), E. Troja (NASA/GSFC/ORAU) and
T. N. Ukwatta (MSU) report on behalf of the Swift Team:
At 05:17:29 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 110213A (trigger=445414). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 43.004, +49.291 which is
RA(J2000) = 02h 52m 01s
Dec(J2000) = +49d 17' 29"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve showed a single-peaked
structure with a duration of about 10 sec. The peak count rate
was ~3000 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 05:19:01.2 UT, 91.7 seconds after
the BAT trigger. XRT found a bright, uncatalogued X-ray source located
at RA, Dec 42.9641, +49.2726 which is equivalent to:
RA(J2000) = 02h 51m 51.38s
Dec(J2000) = +49d 16' 21.3"
with an uncertainty of 5.5 arcseconds (radius, 90% containment). This
location is 115 arcseconds from the BAT onboard position, within the
BAT error circle. No event data are yet available to determine the
column density using X-ray spectroscopy.
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 100 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 02:51:51.40 = 42.96417
DEC(J2000) = +49:16:23.6 = 49.27321
with a 90%-confidence error radius of about 0.61 arc sec. This position is 2.2
arc sec. from the center of the XRT error circle. The estimated magnitude is
16.31 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.32.
Burst Advocate for this burst is V. D'Elia (delia AT asdc.asi.it).
Please contact the BA by email if you require additional information
regarding Swift followup of this burst. In extremely urgent cases, after
trying the Burst Advocate, you can contact the Swift PI by phone (see
Swift TOO web site for information: http://www.swift.psu.edu/too.html.)
GCN Circular 11706
Subject
GRB 110213A: P60 Optical Afterglow Detection
Date
2011-02-13T05:36:43Z (14 years ago)
From
S. Bradley Cenko at Caltech <cenko@srl.caltech.edu>
S. B. Cenko (UC Berkeley) reports on behalf of a larger collaboration:
We have imaged the error circle of GRB110213A (D'Elia et al., GCN
11705) with the automated Palomar 60 inch telescope. Observations began
at 05:19 UT (~ 2 minutes after the burst trigger time) and were taken in
the r' filter. We detect a bright source at the location of the UVOT
afterglow, with coordinates:
02:51:51.43 +49:16:23.3
Using several USNO-B1 field stars for comparison, we measure a magnitude
of R ~ 17.1 at this time. Observations are ongoing.
GCN Circular 11707
Subject
GRB 110213A: ROTSE-III Detection of Optical Counterpart
Date
2011-02-13T05:44:46Z (14 years ago)
From
Brad Schaefer at LSU <schaefer@grb.phys.lsu.edu>
W. Rujopakarn (Steward), B. E. Schaefer (Louisiana State), E.S. Rykoff
(LBNL), report on behalf of the ROTSE collaboration:
ROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB
110213A (Swift trigger 445414). The first image was at 05:17:56.7 UT, 27.1
s after the burst (0.7 s after the GCN notice time). The unfiltered images
are calibrated relative to USNO A2.0. We detect a 15.8 magnitude, fading
source with coordinates:
02:51:51.11 +49:16:20.57 (J2000), with positional uncertainty of 1' or
better
start UT mag mlim(of image)
----------------------------------
05:17:56.7 15.8 17.0
This source is not visible in DSS (second epoch), 2MASS or the MPChecker
database.
Our light curve shows a beautiful rise starting 100 seconds after the
Swift trigger, reaching a peak around 14.5 mag at 200 seconds after the
trigger and then starting a fast decline. Continuing observations are in
progress.
GCN Circular 11708
Subject
GRB 110213A: Bok Telescope Redshift
Date
2011-02-13T07:23:19Z (14 years ago)
From
S. Bradley Cenko at Caltech <cenko@srl.caltech.edu>
P. A. Milne (U. Arizona) and S. B. Cenko (UC Berkeley) report on behalf of
a larger collaboration:
We have obtained a series of optical spectra of the afterglow of GRB
110213A (D'Elia et al, GCN 11705) with the Boller and Chivens Spectrograph
mounted on the 2.3-m Bok telescope. Observations began at 05:53 UT (~ 36
minutes after the Swift trigger time) and cover the wavelength range from
~ 4000-8300 A.
We detect a series of strong, narrow absorption features corresponding to
Mg II and Fe II at a common redshift of z = 1.46. Without the detection
of fine structure lines or a DLA system, we cannot definitively identify
this as the redshift of the GRB host galaxy. However, the lack of
detection of Lyman alpha absorption down to ~ 4000 A limits the redshift
of the host galaxy to z <~ 2.3.
GCN Circular 11709
Subject
GRB 110213A: GRAS011 optical observations
Date
2011-02-13T08:10:35Z (14 years ago)
From
Veli-Pekka Hentunen at Taurus Hill Obs,A95 <veli-pekka.hentunen@kassiopeia.net>
Veli-Pekka Hentunen, Markku Nissinen and Tuomo Salmi (Taurus Hill
Observatory, Varkaus, Finland) report:
GRAS 011 (Global-Rent-a-Scope, Mayhill, New Mexico) CDK20 20
inch (0.51 m) f/6.8 and FLI ProLine PL11002M CCD camera were used
to detect GRB 110213A optical afterglow. The observations were started
at 2011-02-13 05:39:52 (UT) and stopped at 2011-02-13 06:14:37 (UT).
Two unfiltered and one photometric R observations with 600s exposure
times were made. The afterglow was detected at following position
RA 02:51:51.42 and DEC +49:16:23.7 consistent those given by Cenko
S.B. et al. (GCN 11706) to within positional errors.
The following magnitudes were obtained from the observations using
NOMAD1 1392-0071642 (R = 15.230) as the comparison:
Tmid(s)+T0 Filter Exp (sec) Mag Mag err Limit
1643 unfilt 600 15.6 0.1 16.9
2306 unfilt 600 15.8 0.1 16.9
3128 Rc 600 15.9 0.2 16.5
A jpg image of the 600sec unfiltered observation is available at the following URL link:
http://cutenews.kassiopeia.net/data/upimages/GRB110213A_text.jpg
GCN Circular 11710
Subject
GRB 110213A: KAIT observations
Date
2011-02-13T08:19:36Z (14 years ago)
From
Weidong Li at UC Berkeley KAIT/LOSS <weidong@astron.berkeley.edu>
W. Li and A. V. Filippenko, University of California, Berkeley,
on behalf of the KAIT GRB team, report:
The robotic 0.76-m Katzman Automatic Imaging Telescope (KAIT) at Lick
Observatory observed GRB 110213A (D'Elia et al., GCN 11705).
The automatic sequence started at 05:18:43 UT, 74 s after the BAT trigger.
The BAT location has been monitored in V, I, and clear filters, with
varying exposure times. Our image processing pipeline found a new
object within the BAT error circle, with the following position:
R. A. = 02:51:51.40
DEC. = +49:16:23.2 (J2000),
which is consistent with the reported afterglow position by D'Elia et al.
(GCN 11705), Cenko (GCN 11706), and Rujopakarn et al. (GCN 11707).
The OA has magnitude of 17.0 at t = 74 s, brightened to a peak of 14.6
at t = 300 s, then declined to mag 16.0 at t = 2000 s. The OA
then displayed several episodes of re-brightening between t = 2000 s
and 2600 s, at which point the observation was stopped due to a
physical limit of KAIT.
GCN Circular 11712
Subject
GRB 110213A: Enhanced Swift-XRT position
Date
2011-02-13T12:17:31Z (14 years ago)
From
Phil Evans at U of Leicester <pae9@star.le.ac.uk>
J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester)
report on behalf of the Swift-XRT team.
Using 2597 s of XRT Photon Counting mode data and 3 UVOT
images for GRB 110213A, we find an astrometrically corrected X-ray
position (using the XRT-UVOT alignment and matching UVOT field sources
to the USNO-B1 catalogue): RA, Dec = 42.96403, +49.27257 which is equivalent
to:
RA (J2000): 02h 51m 51.37s
Dec (J2000): +49d 16' 21.2"
with an uncertainty of 1.5 arcsec (radius, 90% confidence).
This position may be improved as more data are received. The latest
position can be viewed at http://www.swift.ac.uk/xrt_positions. Position
enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans
et al. (2009, MNRAS, 397, 1177).
This circular was automatically generated, and is an official product of the
Swift-XRT team.
GCN Circular 11713
Subject
GRB 110213A: optical observations
Date
2011-02-13T14:40:27Z (14 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
I. Korobtsev (ISTP), E. Klunko (ISTP), A. Volnova (SAI MSU), A. Pozanenko
(IKI) on behalf of larger GRB follow up collaboration report:
We observed the Swift GRB 110213A (D'Elia et al., GCN 11705) with AZT-33IK
telescope of Sayan observatory (Mondy) starting Feb.13 (UT) 11:26.
In a few first images of exposure 60 s we clearly detect the UVOT afterglow
with a preliminary brightness estimation R ~ 18.0 at 0.2566 days after
burst.
The photometry is based on USNO-B1 field stars.
Observation is continuing.
[GCN OPS NOTE(30apr11): Per author's request, Elunko was changed to Klunko.]
GCN Circular 11714
Subject
GRB 110213A, Swift-BAT refined analysis
Date
2011-02-13T14:53:10Z (14 years ago)
From
Hans Krimm at NASA-GSFC <hans.a.krimm@nasa.gov>
S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC),
V. D'Elia (ASDC),E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA),
C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC),
G. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU)
(i.e. the Swift-BAT team):
Using the data set from T-239 to T+963 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 110213A (trigger #445414)
(D'Elia, et al., GCN Circ. 11705). The BAT ground-calculated position is
RA, Dec = 42.978, 49.278 deg which is
RA(J2000) = 02h 51m 54.8s
Dec(J2000) = +49d 16' 41.4"
with an uncertainty of 1.4 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 5%.
The masked-tagged light curve shows low-level emission starting at about T-30 s
and then a steep rise starting at T-3 s to a peak at T+0.5 s, followed by a
slow decline out to about T+30 s. T90 (15-350 keV) is 48.0 +- 16.0 sec
(estimated error including systematics).
The time-averaged spectrum from T-31.2 to T+32.8 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
1.83 +- 0.12. The fluence in the 15-150 keV band is 5.9 +- 0.4 x 10-6 erg/cm2.
The 1-sec peak photon flux measured from T+8.31 sec in the 15-150 keV band
is 1.6 +- 0.6 ph/cm2/sec. All the quoted errors are at the 90% confidence
level.
The results of the batgrbproduct analysis are available at
http://gcn.gsfc.nasa.gov/notices_s/445414/BA/
GCN Circular 11715
Subject
GRB 110213A: Lightbuckets Optical Observations
Date
2011-02-13T15:07:06Z (14 years ago)
From
Tilan Ukwatta at GSFC/GWU <tilan.ukwatta@gmail.com>
T. N. Ukwatta (MSU), E. Sonbas (GSFC/USRA/Adiyaman Univ.),
N. Gehrels (GSFC), J. Linnemann (MSU), K. Tollefson (MSU),
and U. Abeysekara (MSU)
We observed the Swift GRB 110213A (D'Elia et al., GCN 11705)
afterglow with the Lightbuckets 0.61m rental telescope LB-0001
in Rodeo, NM, USA. Under good weather conditions, four
observations were carried out in the R filter starting
2011-02-13 at 05:33:14 UT (~ 15.7 mins after the GRB trigger).
The burst afterglow is clearly detected in all four
observations and estimated magnitudes are given below:
Time after trigger Exposure (s) Filter Magnitude
15.7 mins (0.26 hours) 60 R 15.4 +/- 0.1
17.8 mins (0.30 hours) 60 R 15.5 +/- 0.1
19.9 mins (0.33 hours) 60 R 15.5 +/- 0.1
22.6 mins (0.38 hours) 60 R 15.7 +/- 0.1
The afterglow, not corrected for Galactic extinction, is
calibrated against the USNO-B1.0 catalog.
GCN Circular 11717
Subject
GRB 110213A: THO optical observations
Date
2011-02-13T22:41:33Z (14 years ago)
From
Veli-Pekka Hentunen at Taurus Hill Obs,A95 <veli-pekka.hentunen@kassiopeia.net>
Veli-Pekka Hentunen, Markku Nissinen, Tuomo Salmi and Harri Vilokki
(Taurus Hill Observatory, Varkaus, Finland) report:
We continued optical observations of GRB 110213A optical afterglow.
We used Celestron C14 XLT and SBIG ST-8XME CCD (Taurus Hill
Observatory, Varkaus, Finland). The observations were started at
2011-02-13 17:18:32 (UT) and stopped at 2011-02-13 18:24:28 (UT).
Three unfiltered and three photometric R observations with 600s exposure
times were made. The afterglow was detected at following position
RA 02:51:51.41 and DEC +49:16:23.0.
The following magnitudes were obtained from the observations using
NOMAD1 1392-0071642 (R=15.230) as the comparison:
Tmid(s)+T0 Filter Exp (sec) Mag Mag err Limit
44163 unfilt 3x600 19.1 0.2 20.3
46231 Rc 3x600 19.2 0.3 20.1
GCN Circular 11718
Subject
GRB 110213A: Swift/UVOT refined analysis
Date
2011-02-13T22:57:40Z (14 years ago)
From
Paul Kuin at MSSL <npkuin@gmail.com>
N.P.M. Kuin (MSSL/UCL) and V. D'Elia (ASDC)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 110213A
100 s after the BAT trigger (D'Elia et al., GCN Circ. 11705). This GRB
was reported by many observers. We see an initial peak around T+300s
after which the GRB declines in brightness until around T+1500s when
a small rebrightening occurs. A tentative redshift was reported by
P.A. Milne (GCN Circ. No 11708) of z=1.46, which is consistent with
the much fainter magnitudes we find in the uvm2 and uvw2 filters.
The refined uvot position (90% confidence limit, 0.5" accuracy) with
reference to USNO-B1 is:
RA (J2000) = 02h 51m 51.39s
DEC (J2000) = 49d 16' 23.54"
Preliminary magnitudes and 3-sigma upper limits in the UVOT
photometric system (Poole et al. 2008, MNRAS, 383, 627) for
the first finding chart (FC) exposures and summed with subsequent
exposures up to about 2500s are:
Filter T_start(s) T_stop(s) Exp(s) Mag (VEGA)
white_FC 100 250 147 16.36 +/- 0.05
u_FC 312 562 246 15.54 +/- 0.04
white 100 2579 517 16.57 +/- 0.01
v 642 2455 227 16.19 +/- 0.04
b 568 2206 178 16.77 +/- 0.03
u 312 2529 448 15.94 +/- 0.02
uvw1 692 2505 198 17.28 +/- 0.08
uvm2 667 2479 218 18.72 +/- 0.20
uvw2 618 2606 238 19.10 +/- 0.18
The values quoted above are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.32 in the direction of the burst
(Schlegel et al. 1998).
GCN Circular 11719
Subject
GRB110213A: MITSuME Okayama Optical Observation
Date
2011-02-14T00:25:08Z (14 years ago)
From
Daisuke Kuroda at OAO/NAOJ <dikuroda@oao.nao.ac.jp>
D. Kuroda, K. Yanagisawa, Y. Shimizu, H. Toda (OAO, NAOJ),
S. Nagayama (NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto)
and N. Kawai(Tokyo Tech)
report on behalf of the MITSuME collaboration:
We observed the field of GRB 110213A (D'Elia et al., GCNC 11705)
with the optical three color (g', Rc and Ic) CCD camera attached
to the MITSuME 50cm telescope of Okayama Astrophysical Observatory.
The observation started on 2011-02-13 09:45:46 UT (~4.5 hours after
the burst). We detected the previously reported afterglow
(Cenko, GCNC 11706) in all the three bands.
Photometric results and are listed below. We used GSC2.3 catalog for
flux calibration.
#T0+[day] MID-UT T-EXP[sec] g' g'_err Rc Rc_err Ic Ic_err
----------------------------------------------------------------------
0.19696 10:01:06 1620.0 18.26 0.09 17.15 0.05 16.53 0.06
0.21845 10:32:02 1620.0 18.78 0.11 17.51 0.05 16.75 0.05
0.23993 11:02:59 1620.0 18.79 0.16 17.60 0.07 17.05 0.07
----------------------------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]
GCN Circular 11721
Subject
GRB 110213A: Swift-XRT refined Analysis
Date
2011-02-14T10:34:12Z (14 years ago)
From
Giulia Stratta at ASDC <stratta@asdc.asi.it>
G. Stratta (ASDC) and V. D'Elia (ASDC) report on behalf of the
Swift-XRT team:
We have analysed 22 ks of XRT data for GRB 110213A (D'Elia et al. GCN
Circ. 11705), from 81 s to 54.5 ks after the BAT trigger. The data
comprise 121 s in Windowed Timing (WT) mode (the first 8 s were taken
while Swift was slewing) with the remainder in Photon Counting (PC)
mode. The enhanced XRT position for this burst was given by Osborne et
al. (GCN. Circ 11712).
The light curve can be modelled with a series of power-law decays. The
initial decay index is alpha=5.2 (+0.5, -0.4). At T+141 s the decay
flattens to an alpha of -0.22 (+0.10, -0.14). The light curve breaks
again at T+1489 s to a decay with alpha=1.10 (+0.07, -0.08), before a
final break at T+9954 s s after which the decay index is 2.14 (+0.10,
-0.09).
A spectrum formed from the PC mode data can be fitted with an absorbed
power-law with a photon spectral index of 2.11 (+/-0.07). The
best-fitting absorption column is 2.81 (+0.24, -0.23) x 10^21 cm^-2,
in excess of the Galactic value of 2.2 x 10^21 cm^-2 (Kalberla et al.
2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion
factor deduced from this spectrum is 4.1 x 10^-11 (6.8 x 10^-11) erg
cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
Total column: 2.81 (+0.24, -0.23) x 10^21 cm^-2
Galactic foreground: 2.2 x 10^21 cm^-2
Excess significance: 20.5 sigma
Photon index: 2.11 (+/-0.07)
The results of the XRT-team automatic analysis are available at
http://www.swift.ac.uk/xrt_products/00445414.
This circular is an official product of the Swift-XRT team.
GCN Circular 11723
Subject
Konus-Wind observation of GRB 110213A
Date
2011-02-14T11:36:03Z (14 years ago)
From
Dmitry Frederiks at Ioffe Institute <fred@mail.ioffe.ru>
S. Golenetskii, R.Aptekar, D. Frederiks, E. Mazets, V. Pal'shin,
P. Oleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf
of the Konus-Wind team, report:
The long GRB 110213A, (Swift/BAT trigger=445414:
D'Elia, et al., GCN 11705; Barthelmy et.al, GCN 11714)
triggered Konus-Wind at T0=19048.893s UT (05:17:28.893)
The burst light curve consists of a single pulse
with a total duration of ~50 s.
The emission is seen up to ~2 MeV.
The Konus-Wind light curve of this GRB is available at
http://www.ioffe.ru/LEA/GRBs/GRB110213_T19048/
As observed by Konus-Wind the burst
had a fluence of (1.0 � 0.15)x10-5 erg/cm2,
and a 256-ms peak flux, measured from T0+1.024s,
of (1.4 � 0.2)x10-6 erg/cm2/s
(both in the 20 keV - 2 MeV energy range).
The time-integrated spectrum of the burst
(from T0 to T0+24.832 s) is best fitted
in the 20 keV - 2 MeV range by a power law
with exponential cutoff model, for which
alpha = -1.65 (-0.2, +0.3),
and Ep = 91(-26, +31) keV,
chi2 = 62.5/61 dof.
The spectrum at the maximum count rate
(measured from T0 to T0+8.448 s) is well fitted
in the 20 keV - 2 MeV range by a power law
with exponential cutoff model, for which
alpha = -1.53 (-0.21, +0.24),
and Ep = 110(-20, +32) keV,
chi2 = 52.8/61 dof.
This spectrum is nearly well fitted
in the 20 keV - 2 MeV range by the GRB (Band)
model, for which:
the low-energy photon index alpha = -1.28 (-0.32, +0.44),
the high energy photon index beta = -2.4 (-0.7, +0.2),
the peak energy Ep = 89(-19, +28) keV,
chi2 = 49.1/60 dof.
Assuming the Bok telescope redshift z = 1.46 (Milne & Cenko, GCN 11708)
and a standard cosmology model with H_0 = 71 km/s/Mpc, Omega_M = 0.27,
Omega_Lambda = 0.73, the isotropic energy release
E_iso is (5.5 � 0.08)x10^52 erg, the peak luminosity
L_iso_max is (1.9 � 0.3)x10^52 erg/s,
and Ep_rest is 224 � 74 keV.
All the quoted results are preliminary.
All the quoted errors are at the 90% confidence level.
GCN Circular 11724
Subject
GRB 110213A: MITSuME Akeno Optical Observation
Date
2011-02-14T14:52:06Z (14 years ago)
From
Nobuyuki Kawai at Tokyo Tech <nkawai@hp.phys.titech.ac.jp>
H. Nakajima, Y. Yatsu, T. Enomoto, K. Kawakami, K. Tokoyoda, T. Ohkawa, and
N. Kawai (Tokyo Tech) report on behalf of the MITSuME collaboration:
We observed the field of GRB 110213A (D'Elia et al , GCNC 11705)
with the optical three color (g', Rc and Ic) CCD camera attached
to the MITSuME 50cm telescope of Akeno Observatory.
The observation started on 2011-02-13 8:37 UT (~3.3 hours after the burst).
We detected the previously reported afterglow (Cenko et al., GCN 11706)
in all three bands.
Photometric results and are listed below. We used GSC2.3 catalog for
flux calibration.
T0+[day] MID-UT T-EXP[sec] g' Rc Ic
-----------------------------------------------------------------------
0.2083 10:17:51 2340 18.20+-0.06 17.28+-0.04 16.62+-0.04
-----------------------------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]
GCN Circular 11727
Subject
GRB 110213A: Fermi GBM observation
Date
2011-02-14T16:06:55Z (14 years ago)
From
Suzanne Foley at MPE <sfoley@mpe.mpg.de>
S. Foley (MPE)
reports on behalf of the Fermi GBM Team:
"At 05:17:11.27 UT on 13 February 2011, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 110213A (trigger 319267033 / 110213220)
which was also detected by the Swift/BAT
(D'Elia et al. 2011, GCN 11705).
The GBM on-ground location is consistent with the Swift position.
The angle from the Fermi LAT boresight is 101 degrees.
The GBM light curve consists of two main pulses
with a duration (T90) of about 33 s (50-300 keV).
The time-averaged spectrum from T0-3.072 s to T0+31.745 s is
well fit by a power law function with an exponential
high-energy cutoff. The power law index is -1.44 (+/- 0.05) and
the cutoff energy, parameterized as Epeak, is 98.4 (+8.5/-6.9) keV.
The event fluence (10-1000 keV) in this time interval is
(1.03 +/- 0.03)E-05 erg/cm^2. The 1.024-sec peak photon flux measured
starting from T0+18.17 s in the 10-1000 keV band
is 17.7 +/- 0.5 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
GCN Circular 11728
Subject
Swift GRB110213A: interesting behaviour
Date
2011-02-14T17:27:41Z (14 years ago)
From
Massimiliano de Pasquale at MSSL-UCL <mdp@mssl.ucl.ac.uk>
M. De Pasquale (MSSL-UCL), V. D'Elia (ASDC) and P. Kuin (MSSL-UCL)
report, on behalf of the Swift team:
GRB110213A (D'Elia et al., GCN circ 11705) exhibits an interesting
behaviour both in the X-ray and optical bands. After a broad peak and
phase of normal decline, the lightcurves show achromatic breaks at about
T0+10 ks, after which the slopes in both bands becomes about -2. These
data strongly indicate that we are seeing a very early jet break. We
encourage observations from ground facilities.
The predicted magnitudes for 00:00 UT of 15/2/2011 are R ~ 22.6,
v ~ 21.7, b ~ 23.8, u ~ 21.7.
GCN Circular 11730
Subject
GRB110213A: RAPTOR Early Optical Peak and Plateau Measurements
Date
2011-02-14T23:04:03Z (14 years ago)
From
James Wren at LANL <jwren@nis.lanl.gov>
J. Wren, W.T. Vestrand, P.R. Wozniak, H. Davis,
of Los Alamos National Laboratory report:
The RAPTOR telescope system responded to Swift trigger 445414
(V. D'Elia et al., GCN 11705) under fair observing conditions. Our
narrow-field instruments began observing the location at 05:17:58.2 UTC,
28.7 seconds after the initial BAT trigger. We detect the optical
counterpart at the location reported by the Swift UVOT team. The
counterpart brightens from below our threshold at around 100 seconds
after the BAT trigger. It reaches a peak magnitude of 14.7 at T~300 s.
The counterpart then begins a steady decline to magnitude 16.0 at
T~2000 s. At that point, the counterpart re-brightens to a plateau at
roughly magnitude 15.8 for about an hour before resuming the fading
behavior. The following table gives a sample of our observations:
t-mid(s) exp(s) mag mag-err
--------------------------------------------
143.80 10.0 15.23 0.03
352.60 10.0 14.68 0.02
2179.60 30.0 16.12 0.03
4522.90 30.0 15.58 0.03
7172.30 30.0 16.00 0.04
The unfiltered images were calibrated against the USNO-B1 R-band.
GCN Circular 11731
Subject
GRB 110213A: TNT optical observations
Date
2011-02-15T03:08:19Z (14 years ago)
From
L.P. Xin at NAOC <xlp@bao.ac.cn>
L.P. Xin, Y.L. Qiu, J.Y. Wei, J. Wang, J.S. Deng,
C. Wu, X. H. Han, M, Zhai on behalf of EAFON report:
We observed GRB 110213A (V. D'Elia et al. GCN11705 )
with Xinglong TNT telescope for two epochs from Feb 13th to Feb 14th.
A series of R-band images were obtained with an exposure
time of 300 sec for each frame.
The optical afterglow counterpart (e.g. V. D'Elia et al. GCN11705;
Cenko GCN 11706; Wren et al. GCN 11730 )
could be clearly detected in each frame otained at Feb 13th.
It was also detected at Feb 14th after combining 12 frames.
The brightness of the afterglow was estimated to be about
20.2 +/- 0.2 mag relatively to USNO B1.0 R2 mag
at the mean time of 1.24 days after the burst.
Further observations are encouraged.
This message may be cited.
GCN Circular 11733
Subject
GRB 110213A: YNAO-GMG Observations
Date
2011-02-15T06:46:12Z (14 years ago)
From
Jirong Mao at INAF-OAB <jirong.mao@brera.inaf.it>
Zhao X. H., Bai J. M., & Mao J. report on behalf of the YNAO-GMG Observation:
We observed GRB110213A (D'Elia et al., GCN circ 11705) using one 2.4m
telescope of Yunnan Observatory located at Gao-Mei Gu (GMG) about 7hr
after the trigger. The afterglow was clearly detected. The preliminary
results are:
mid time (UT) filter exposure time (min) magnitude
2011-02-13 12:48:22 R 20 17.4
2011-02-13 13:08:55 V 20 18.2
2011-02-13 13:34:29 B 30 18.9
2011-02-13 14:00:28 B 20 19.0
2011-02-13 14:20:39 V 20 18.3
2011-02-13 14:40:50 R 20 18.3
The magnitudes were calibrated by NOMAD1.
This meesage may be cited.
GCN Circular 11742
Subject
GRB 110213A: optical observations in Mondy
Date
2011-02-16T19:00:13Z (14 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Volnova (SAI MSU), A. Pozanenko (IKI), I. Korobtsev (ISTP), E. Klunko
(ISTP) on behalf of larger GRB follow up collaboration report:
We observed the Swift GRB 110213A (D'Elia et al., GCN 11705) with AZT-33IK
telescope of Sayan observatory (Mondy) between Feb.13 (UT) 11:23 - 13:21
(Korobtsev et al., GCN 11713) and Feb. 15 (UT) 11:55 - 12:55. We took
several series in both epochs in R filter. The optical afterglow (D'Elia et
al., GCN 11705, Cenko GCN 11706, Rujopakarn et al., GCN 1707) is clearly
visible on single 60 s exposure images on Feb. 13, and afterglow is visible
in a stacked image on Feb. 15. During our observations within 2 hours on
Feb. 13 (0.2555 - 0.3316 days after burst) the brightness of the afterglow
was not changing within error bars of about 0.06m. One can suggest that we
observed a plateau phase or a broad peak of the afterglow light curve. The
afterglow is still bright (R ~ 20.45) at 2.297 days after burst.
The photometry based on the USNO-B1.0 star 1392-0070724 (J2000) RA=02 51
53.41, Dec= +49 16 02.9, assuming R=16.83:
T0+ Filter, Exposure, OT mag.,
(mid, d) (s)
0.2555 R 4x60 17.61 +/- 0.06
0.3260 R 4x60 17.76 +/- 0.07
2.2973 R 3600 20.45 +/- 0.12
The photometry above is still preliminary.
[GCN OPS NOTE(30apr11): Per author's request, Elunko was changed to Klunko.]
GCN Circular 11744
Subject
GRB 110213A: optical observations in CrAO
Date
2011-02-17T05:56:48Z (14 years ago)
From
Alina Volnova at SAI MSU <alinusss@gmail.com>
V. Rumyantsev(CrAO), K. Antoniuk (CrAO), A. Pozanenko (IKI) report on
behalf of larger GRB follow-up collaboration:
We observed the field of the Swift GRB 110213A (D'Elia et al., GCN 11705)
with AZT-11 telescope of CrAO between Feb. 14 (UT) 19:25 - 20:25 under poor
seeing of about 5". We do not detect the UVOT afterglow up to R=19.5 (3
sigma). The photometry based on the USNO-B1.0 star 1392-0070724 (J2000) 02
51 53.41 +49 16 02.9, assuming R=16.83:
T0+ Filter, Exposure, OT mag., UpperLimit
(mid, d) (s)
1.6095 R 20x180 n/d 19.5
GCN Circular 11832
Subject
GRB 110213A, the review of the sky area in plate archives
Date
2011-03-29T13:00:03Z (14 years ago)
From
Valentyna Golovnya at Main Astro Obs,Kyiv <golov_v@ukr.ne>
GRB 110213A, the review of the sky area in plate archives
V.V. Golovnya, L.M. Kizyun, L.K. Pakuliak (Main Astro Obs, Kyiv)
report:
We have undertaken the review of the sky area of GRB 110213A
(J.P. Osborne et al. GCN11712) on astronegatives, collected
in Ukrainian NAS Main astronomical observatory plate archive
(1976-1996). All the plates with the possible object appearance
are digitized using Microtek ScanMaker 9800XL TMA flatbed scanner
and have been placed into Golosiiv Plate Archive database DBGPA
with open access to them.
The list of plates is given in the table:
YYYYMMDD UT Plates Exp. LimMag
19831203 19:41:42 GUA040C000261A 16.0 15.50
19840128 16:46:54 GUA040C000282A 13.5 15.25
19840128 17:07:51 GUA040C000283A 13.5 15.25
19841019 22:27:46 GUA040C000514A 16.3 16.90
19851109 21:12:03 GUA040C000773A 16.0 15.90
19871023 22:27:36 GUA040C001142 16.0 16.40
19871023 22:48:58 GUA040C001143A 16.0 17.85
19871223 18:25:56 GUA040C001174 16.0 15.50
19871223 18:49:42 GUA040C001175 16.2 17.85
19891026 22:17:26 GUA040C001526A 17.0 16.15
We detect the object at the pointed place (J.P. Osborne et al)
on the plates GUA040C001143A and GUA040C001175. Brightness of
the object is estimated as V mag = 16.8.
Plates: the plate's identifier in GUA040C archive of DWA
(D/F=400/2000, M=103"/mm) of the Ukrainian NAS Main
Astro obs in Kyiv (Marsden's number - 83)[1].
Exp. - Duration of the maximum exposure (minutes).
LimMag - Limited V mag, derived in the 8 minutes area around
the location given in J.P. Osborne et al. GCN 11712:
RA(J2000)= 02h 51m 51.37s, Dec(J2000)= +49d 16' 21.2".
The preview images of 10 areas together with
the 15x7 min.of arc area from SkyMap can be found in
http://gua.db.ukr-vo.org/img/grb/110213A/index.html
The images with full resolution are available via e-mail on
demand.
References:
1.L.Pakuliak DATABASE of GOLOSIIV PLATE ARCHIVE (DBGPA V2.0),
http://gua.db.ukr-vo.org