GRB110223A

This page lists all entries on GRB110223A in GRBweb

Summary IPN Swift GCN 11753 GCN 11755 GCN 11759 GCN 11761 GCN 11762 GCN 11763 GCN 11764 GCN 11767 GCN 11769 GCN 11772

Summary table
Variable Value Source
T0 20:56:59 UTC GCN_circulars,Swift Det
ra 345.8522° Swift
decl 87.5579° Swift
pos_error 2.59e-04° Swift
T90 7.0 s Swift
T90_start 20:56:59 UTC Swift
fluence 1.60e-07 erg/cm² Swift
T100 7.0 s
GBM_located False
mjd 55615.87290509259 GCN_circulars,Swift Det
IPN table
GRB_name GRB110223A
ra 345.6000°
decl 87.5667°
pos_error 5.00e-02°
Swift table
GRB_name GRB110223A
t_trigger 20:56:59 UTC
ra 345.8522°
decl 87.5579°
pos_error 2.59e-04°
T90 7.0 s
fluence 1.60e-07 erg/cm²
GCN 11753 table
GRB_name GRB110223A
GCN_number 11753
Detection_method Swift Det
t_trigger 20:56:59 UTC
ra 345.5990°
decl 87.5670°
Circular_text TITLE: GCN CIRCULAR NUMBER: 11753 SUBJECT: GRB 110223A: Swift detection of a burst DATE: 11/02/23 21:09:38 GMT FROM: Scott Barthelmy at NASA/GSFC T. Sakamoto (NASA/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester), P. A. Evans (U Leicester), J. M. Gelbord (PSU), C. Guidorzi (U Ferrara), S. T. Holland (CRESST/USRA/GSFC), E. A. Hoversten (PSU), J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA), F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL), E. Sonbas (GSFC/USRA/Adiyaman Univ.), M. Stamatikos (OSU/NASA/GSFC) and C. A. Swenson (PSU) report on behalf of the Swift Team: At 20:56:59 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 110223A (trigger=446674). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 345.599, +87.567 which is RA(J2000) = 23h 02m 24s Dec(J2000) = +87d 34' 03" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single peak with a duration of about 5 sec. The peak count rate was ~1600 counts/sec (15-350 keV), at ~1 sec after the trigger. The XRT began observing the field at 20:58:27.8 UT, 88.6 seconds after the BAT trigger. Using promptly downlinked data we find a bright, uncatalogued X-ray source located at RA, Dec 345.85923, 87.55851 which is equivalent to: RA(J2000) = 23h 03m 26.22s Dec(J2000) = +87d 33' 30.6" with an uncertainty of 3.7 arcseconds (radius, 90% containment). This location is 50 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at http://www.swift.ac.uk/sper. A power-law fit to a spectrum formed from promptly downlinked event data gives a column density in excess of the Galactic value (5.61 x 10^20 cm^-2, Kalberla et al. 2005), with an excess column of 2.5 (+1.82/-1.63) x 10^21 cm^-2 (90% confidence). The initial flux in the 2.5 s image was 8.97e-10 erg cm^-2 s^-1 (0.2-10 keV). UVOT took a finding chart exposure of 150 seconds with the White filter starting 97 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.34. Burst Advocate for this burst is T. Sakamoto (Taka.Sakamoto AT nasa.gov). 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 11755 table
GRB_name GRB110223A
GCN_number 11755
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 11755 SUBJECT: GRB 110223A: Observations from BOOTES-2 DATE: 11/02/23 22:49:23 GMT FROM: Martin Jelinek at Inst.Astrophys.Andalucia,Granada M. Jelinek, (IAA-CSIC), A. de Ugarte Postigo (DARK/NBI), P. Kubanek and A.J. Castro-Tirado (IAA-CSIC) on behalf of a larger collaboration report: We have observed the afterglow of GRB 110223A (Sakamoto et al., GCNC 11753) with the 0.6m TELMA/BOOTES-2 located in Malaga (Spain). R-band observations began 228 seconds after the burst. We do not detect any source within the XRT error box down to the following detection limits, as compared with the USNO-B1.0 catalogue: exp start(t-t0) integration 3-sigma limit 228 3 15.4 228 669 17.6 930 1035 18.0 This message can be cited.
GCN 11759 table
GRB_name GRB110223A
GCN_number 11759
Detection_method Swift-XRT Det
ra 345.8535°
decl 87.5577°
Circular_text TITLE: GCN CIRCULAR NUMBER: 11759 SUBJECT: GRB 110223A: Enhanced Swift-XRT position DATE: 11/02/24 08:51:41 GMT FROM: Phil Evans at U of Leicester P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester) report on behalf of the Swift-XRT team. Using 539 s of XRT Photon Counting mode data and 1 UVOT images for GRB 110223A, 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 = 345.85354, +87.55766 which is equivalent to: RA (J2000): 23h 03m 24.85s Dec (J2000): +87d 33' 27.6" with an uncertainty of 2.0 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 11761 table
GRB_name GRB110223A
GCN_number 11761
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 11761 SUBJECT: GRB 110223A: Swift-XRT refined Analysis DATE: 11/02/24 09:52:03 GMT FROM: Owen Littlejohns at U of Leicester O. M. Littlejohns (U. Leicester) and T. Sakamoto (NASA/UMBC) report on behalf of the Swift-XRT team: We have analysed 2.7 ks of XRT data for GRB 110223A (Sakamoto et al. GCN Circ. 11753), from 78 s to 29.6 ks after the BAT trigger. The data comprise 40 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 Evans et al. (GCN. Circ 11759). The light curve can be modelled with an initial power-law decay with an index of alpha=2.96 (+0.50, -0.27), followed by a break at T+386 s to an alpha of 0.52 (+0.15, -0.16). A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.4 (+0.4, -0.3). The best-fitting absorption column is 2.3 (+0.9, -0.8) x 10^21 cm^-2, in excess of the Galactic value of 5.6 x 10^20 cm^-2 (Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.4 x 10^-11 (6.6 x 10^-11) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 2.3 (+0.9, -0.8) x 10^21 cm^-2 Galactic foreground: 5.6 x 10^20 cm^-2 Excess significance: 4.5 sigma Photon index: 2.4 (+0.4, -0.3) The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00446674. This circular is an official product of the Swift-XRT team.
GCN 11762 table
GRB_name GRB110223A
GCN_number 11762
Detection_method Optical
ra 345.8346°
decl 87.5581°
Circular_text TITLE: GCN CIRCULAR NUMBER: 11762 SUBJECT: GRB 110223A: Liverpool Telescope observations DATE: 11/02/24 11:24:50 GMT FROM: Cristiano Guidorzi at Ferrara U,Italy C. Guidorzi (U. Ferrara), A. Melandri (INAF-OAB), I.A. Steele, C.G. Mundell, S. Kobayashi (Liverpool JMU), A. Gomboc (U. Ljubljana) on behalf of a large collaboration report: The 2-m Liverpool Telescope automatically began observing GRB 110223A (Sakamoto et al. GCN Circ. 11753) on February 23, 20:59:47 UT, 2.8 minutes from the GRB trigger time with the SDSS filters riz. Within the UVOT-enhanced XRT error circle (Evans et al., GCN Circ. 11759) we do not find any source down to the following limiting magnitudes. Mid time from Tot Exposure Filter Limiting Magnitude trigger (s) (s) ------------------------------------------------------------ 1920 780 r > 22.2 2320 720 i > 21.6 2620 720 z > 19 ------------------------------------------------------------ Calibration is against some nearby USNOB-1 stars (R2 and I magnitudes). However, we note the presence of an uncatalogued source at RA = 23:03:20.31, Dec = +87:33:29.3 (J2000), lying 3.4" from the XRT centre with the following magnitudes: r = 21.6 +- 0.1 i = 20.9 +- 0.1 This source does not exhibit any fading during the observations.
GCN 11763 table
GRB_name GRB110223A
GCN_number 11763
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 11763 SUBJECT: GRB 110223A : early optical limit by "Pi of the Sky" DATE: 11/02/24 11:24:51 GMT FROM: Marcin Sokolowski at Soltan Inst. Nuc Studies,Warsaw M.Sokolowski,T.Batsch,A.Majcher,A.Majczyna,K.Nawrocki,J.Uzycki,G.Wrochna (SINS, Swierk), M.Cwiok,W.Dominik,L.W.Piotrowski,A.F.Zarnecki (University of Warsaw), K.Malek,L.Mankiewicz,R.Opiela,M.Siudek,V.Repei (CFT PAN), G.Kasprowicz,M.Zaremba (Warsaw University of Technology), from the "Pi of the Sky" collaboration ( http://grb.fuw.edu.pl ). M. Jelinek and A. J.Castro-Tirado (IAA-CSIC Granada) on behalf of a larger collaboration. The wide field "Pi of the Sky North" apparatus installed in the BOOTES-1 station at ESAt/INTA-CEDEA in Mazagon (Huelva, Spain; http://grb.fuw.edu.pl/pi/index.html#piinta_site.htm ) started observing position of GRB 110223A 25 seconds after BAT trigger, 165 seconds after the burst. No new source has been identified on 10s exposures nor on the sums of images corresponding to 50s exposure. Following limits were obtained: t_start - t0 start (UT) end (UT) 3-sigma limit 165 20:59:44 - 20:59:54 11.0 165 20:59:44 - 21:00:45 12.0 where limits are based on the reference star magnitudo in V filter.
GCN 11764 table
GRB_name GRB110223A
GCN_number 11764
Detection_method Swift-BAT Det
ra 345.3860°
decl 87.5860°
Circular_text TITLE: GCN CIRCULAR NUMBER: 11764 SUBJECT: GRB 110223A: Swift-BAT refined analysis DATE: 11/02/24 13:27:17 GMT FROM: Michael Stamatikos at OSU/GSFC W. H. Baumgartner (GSFC/UMBC), S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC), 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/NASA/GSFC), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team): Using the data set from T-240 to T+300 sec from the recent telemetry downlink, we report further analysis of BAT GRB 110223A (trigger #446674) (Sakamoto, et al., GCN Circ. 11753). The BAT ground-calculated position is RA, Dec = 345.386, 87.586 deg which is RA(J2000) = 23h 01m 32.7s Dec(J2000) = +87d 35' 11.3" with an uncertainty of 2.5 arcmin, (radius, sys+stat, 90% containment). The partial coding was 60%. The mask-weighted light curve shows a FRED-like peak at ~T+0.5 sec. T90 (15-350 keV) is 7.0 +- 2.2 sec (estimated error including systematics). The time-averaged spectrum from T+0.1 to T+8.1 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.70 +- 0.33. The fluence in the 15-150 keV band is 1.6 +- 0.4 x 10^-07 erg/cm2. The 1-sec peak photon flux measured from T+0.08 sec in the 15-150 keV band is 0.6 +- 0.2 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/446674/BA/
GCN 11767 table
GRB_name GRB110223A
GCN_number 11767
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 11767 SUBJECT: GRB GRB 110223A: MASTER VWF early optical observations DATE: 11/02/24 16:32:33 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V.Yurkov, Yu.Sergienko, D.Varda, I.Kudelina Blagoveschensk Educational State University, Blagoveschensk K.Ivanov, O.Chuvalaev, V.Poleschuk, E.Konstantinov, V.Lenok, O.Gres, S.Yazev, N.M.Budnev, Irkutsk State University E. Gorbovskoy, V. Lipunov, V.Kornilov, A.Belinski, N.Shatskiy, N.Tyurina, D.Kuvshinov, P.Balanutsa, V.V.Chazov, P.V.Kortunov, A.Kuznetsov, D.Zimnukhov, M. Kornilov, V.Shumkov, S.Shurpakov Sternberg Astronomical Institute, Moscow State University V.Krushinski, I.Zalozhnich, A. Popov Ural State University, Kourovka A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory MASTER II robotic telescopes (MASTER-Net: http://observ.pereplet.ru) located in Amur-Blagoveschensk was pointed to the GRB110223A 7sec after notice time and 147 sec after GRB time. Unfortunately, main telescopes was not in focus. But we have images from Very Wide Filed Cameras mounted on telescope. On our first (5s exposure) set we haven't found optical transient within SWIFT-BAT error-box (Littlejohns et al., GCN Curc 11761) brighter 12 mag (unfiltered). 12 coaded first images give limit 13 mag (mean time ~ 177 sec after trigger). The message may be cited. The first image is available at http://observ.pereplet.ru/images/GRB110223A/first.jpg There is Polar star at right botom angle of the image. mailto: lipunov@sai.msu.ru
GCN 11769 table
GRB_name GRB110223A
GCN_number 11769
Detection_method Swift-UVOT Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 11769 SUBJECT: Swift/UVOT observations of GRB110223A DATE: 11/02/24 23:12:30 GMT FROM: Massimiliano de Pasquale at MSSL-UCL M. De Pasquale (MSSL-UCL) and T. Sakamoto (GSFC) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 110223A 97 s after the BAT trigger (Sakamoto et al., GCN Circ. 11753). No optical afterglow consistent with the XRT enhanced position (Evans et al., GCN circ. 11759) is detected in the initial UVOT exposures nor in the summed exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Poole et al. 2008, MNRAS, 383, 627) for the first finding chart (FC) exposure and subsequent exposures are: Filter T_start(s) T_end(s) Exp Magnitude white (fc) 97 246 147 >20.81 white 97 5588 344 >21.16 v 639 5998 217 >19.40 b 565 5383 216 >20.00 u (fc) 310 559 196 >19.41 u 310 5177 443 >20.15 uw1 4773 6408 393 >20.13 um2 663 6203 412 >20.14 uw2 615 5794 216 >19.89 The above magnitudes are not corrected for the strong Galactic extinction along the line of sight, corresponding to E(B-V) = 0.34 (Schlegel et al. 1998).
GCN 11772 table
GRB_name GRB110223A
GCN_number 11772
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 11772 SUBJECT: GRB 110223A: optical upper limits DATE: 11/03/03 14:41:32 GMT FROM: Alina Volnova at SAI MSU V. Rumyantsev(CrAO), N. Pit (CrAO), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of the Swift GRB 110223A (Sakamoto et al., GCN 11753) with AZT-11 telescope of CrAO starting on Feb. 23 (UT) 22:44 and under seeing of about 2.2 arsces. In the enhanced Swift-XRT position (Evans et al., GCN 11759) we do not detect any object. We also do not detect the uncatalogued source reported by Guidorzi et al., GCN 11762. The photometry is based on the USNO B1.0 star 1775-0024257 (23 03 42.29 +87 32 38.4) assuming R=17.73. T0+ Filter, Exposure, mag. (mid, d) (s) 0.0965 R 21x180 >21.5 (3 sigma) The finding chart can be found at http://grb.rssi.ru/GRB110223A/GRB110223A_110223_azt11.gif