GRBweb by P. Coppin

This page lists all entries on GRB220506A in GRBweb

Summary IPN GCN 32005 GCN 32006 GCN 32008 GCN 32012 GCN 32014 GCN 32057

Summary table
Variable	Value	Source
T0	6:28:15 UTC	GCN_circulars,Konus-Wind Det
ra	239.5208°	IPN
decl	-27.0333°	IPN
pos_error	3.50e-01°	IPN
GBM_located	False
mjd	59705.26961805556	GCN_circulars,Konus-Wind Det

IPN table
GRB_name	GRB220506A
ra	239.5208°
decl	-27.0333°
pos_error	3.50e-01°

GCN 32005 table
GRB_name	GRB220506A
GCN_number	32005
Detection_method	Swift Other
Circular_text	TITLE: GCN CIRCULAR NUMBER: 32005 SUBJECT: GRB 220506A: Tiled Swift observations DATE: 22/05/06 16:54:11 GMT FROM: Phil Evans at U of Leicester P. A. Evans (U. Leicester) reports on behalf of the Swift team: Swift has initiated a series of observations, tiled on the sky, of the MAXI GRB 220506A. Automated analysis of the XRT data will be presented online at http://www.swift.ac.uk/xrt_products/TILED_GRB00105 Any uncatalogued X-ray sources detected in this analysis will be reported on this website and via GCN COUNTERPART notices. The probability of finding serendipitous sources, unrelated to the MAXI event is high: any X-ray source considered to be a probable afterglow candidate will be reported via a GCN Circular after manual consideration. Details of the XRT automated analysis methods are detailed in Evans et al. (2007, A&A, 469, 379; 2009, MNRAS, 397, 1177 and 2014, ApJS, 210, 8). This circular is an official product of the Swift-XRT team.

GCN 32006 table
GRB_name	GRB220506A
GCN_number	32006
Detection_method	Swift-XRT Other
ra	239.7257°
decl	-26.4186°
Circular_text	TITLE: GCN CIRCULAR NUMBER: 32006 SUBJECT: GRB 220506A: Swift-XRT afterglow detection DATE: 22/05/07 09:10:00 GMT FROM: Phil Evans at U of Leicester J.P. Osborne (U. Leicester), M. Capalbi (INAF-IASFPA), M. Perri (SSDC & INAF-OAR), V. D'Elia (SSDC & INAF-OAR), A. Tohuvavohu (U. Toronto), B. Sbarufatti (PSU), D.N. Burrows (PSU), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester) and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team: Swift-XRT has performed follow-up observations of the MAXI-detected burst GRB 220506A (Urabe et al. GCN Circ. 32001) in a series of observations tiled on the sky. The total exposure time is 1.2 ks, distributed over 6 tiles; the maximum exposure at a single sky location was 463 s. The data were collected between T0+38.2 ks and T0+55.6 ks, and are entirely in Photon Counting (PC) mode. An uncatalogued X-ray source is detected and is above the RASS 3-sigma upper limit at this position, and is therefore likely the GRB afterglow. The position of this source is RA, Dec=239.7257, -26.4186 which is equivalent to: RA (J2000): 15:58:54.18 Dec(J2000): -26:25:06.9 with an uncertainty of 7.2 arcsec (radius, 90% confidence). This position is 15.0 arcmin from the MAXI position. We cannot determine at the present time whether the source is fading. The results of the XRT-team automatic analysis of the likely afterglow are at https://www.swift.ac.uk/xrt_products/TILED_GRB00105/Source1.php. The results of the full analysis of the tiled XRT observations are available at https://www.swift.ac.uk/xrt_products/TILED_GRB00105. This circular is an official product of the Swift-XRT team.

GCN 32008 table
GRB_name	GRB220506A
GCN_number	32008
Detection_method	Optical
Circular_text	TITLE: GCN CIRCULAR NUMBER: 32008 SUBJECT: GRB 220506A: BOOTES-5/JGT optical upper limit DATE: 22/05/07 16:44:31 GMT FROM: Youdong HU at IAA-CSIC Y.-D. Hu, E. Fernandez-Garcia, I. Perez-Garcia, T.-R. Sun, A. J. Castro-Tirado, M.D. Caballero-Garcia, R. Sanchez-Ramirez (IAA-CSIC), D. Hiriart and W. H. Lee (UNAM), C. J. Perez del Pulgar and I. Carrasco (UMA), I. H. Park (SKKU) on behalf of a larger collaboration, report: Following the detection of GRB 220506A by MAXI/GSC (Urabe et al. GCNC 32001) and Swift (Evans et al. GCNC 32005), the BOOTES-5/JGT 0.6m robotic telescope at Observatorio Astronomico Nacional in San Pedro Martir (Mexico) observed the GRB location starting on May 7, 10:36 UT (~1.2 days after trigger) at high airmass. In the co-added image (15 x 60 s exposures in the clear filter), no optical afterglow is detected within the Swift/XRT error region (Osborne et al. GCNC 32006) down to 19.0 mag. We thank the staff at Observatorio Astronomico Nacional in San Pedro Martir for their excellent support.

GCN 32012 table
GRB_name	GRB220506A
GCN_number	32012
Detection_method	Optical
ra	239.7258°
decl	-26.4186°
Circular_text	TITLE: GCN CIRCULAR NUMBER: 32012 SUBJECT: GRB 220506A: GIT optical upper limit. DATE: 22/05/09 19:01:11 GMT FROM: Harsh Kumar at Indian Inst of Tech,Bombay V. Swain (IITB), H. Kumar (IITB), K. Angail (IAO), V. Bhalerao (IITB), G. C. Anupama (IIA), S. Barway (IIA) report on behalf of the GIT team: We observed GRB 220506A detected by MAXI/GSC (Urabe et al. GCN #32001) and Swift (Phil Evans et al. GCN #32005), with a 0.7m GROWTH-India Telescope (GIT). The observation started at 19:08:47 UT on 2022-05-06, 12.68 hours after the MAXI/GSC trigger. We obtained multiple 300-sec exposures in the r' filter. We did not detect any new source in our stacked image within the 7.2 arcsec radius circle around R.A.= 15h 58m 54.18s, Dec.= -26d 25' 06.9" (Phil Evans et al. GCN #32006). The obtained upper limit follows as: ---------------------------------------------------------------------------------- JD (mid) | T_mid-T0(hrs) | Exposure (sec) | Filter | Lim_mag (5-sigma) | ---------------------------------------------------------------------------------- 2459706.327602595 | 13.39 | 7 x 300 (stacked) | r' | >20.38 | ---------------------------------------------------------------------------------- The magnitudes are calibrated against PanSTARRS DR1 (Chambers et al., 2016) and not corrected for Galactic extinction. The GROWTH India Telescope (GIT) is a 70-cm telescope with a 0.7-degree field of view, set up by the Indian Institute of Astrophysics (IIA) and the Indian Institute of Technology Bombay (IITB) with funding from DST-SERB and IUSSTF. It is located at the Indian Astronomical Observatory (Hanle), operated by IIA. We acknowledge funding by the IITB alumni batch of 1994, which partially supports operations of the telescope. Telescope technical details are available at https://sites.google.com/view/growthindia/.

GCN 32014 table
GRB_name	GRB220506A
GCN_number	32014
Detection_method	MITSuME
Circular_text	TITLE: GCN CIRCULAR NUMBER: 32014 SUBJECT: GRB 220506A: MITSuME Akeno optical upper limits DATE: 22/05/10 06:41:09 GMT FROM: Naohiro Ito at Tokyo Tech N. Ito, M. Sasada, Y. Imai, K. L. Murata, M. Niwano, Y. Takamatsu, S. Sato, M. Tateda, T. Hattori, R. Hosokawa, Y. Yatsu, and N. Kawai (Tokyo Tech) report on behalf of the MITSuME collaboration: We observed the field of GRB 220506A (Urabe et al. GCN Circular #32001, Evans et al. GCN Circular #32005, Osborne et al. GCN Circular #32006, Hu et al. GCN Circular #32008, Swain et al. GCN Circular #32012) with the optical three color (g', Rc, and Ic) CCD cameras attached to the MITSuME 50 cm telescope Akeno. The observation with a series of 60 sec exposures started at 2022-05-06 13:00:47 UT (6.5 hours after the MAXI/GSC trigger). We stacked the images with good conditions. Additionally, we performed the other follow-up observation starting at 2022-05-09 16:12:56 UT. We did not detect any uncatalogued sources within the XRT error region (Osborne et al. GCN Circular #32006). We obtained the 5-sigma limits of the stacked images as follows. T0+[hour] MID-UT T-EXP[sec] 5-sigma limits ------------------------------------------------------------------------------------------------ 8.2 2022-05-06 14:42:28 240 g'>16.9, Rc>17.0, Ic>16.6 34.2 2022-05-07 16:37:41 8580 g'>18.9, Rc>19.5, Ic>18.8 82.9 2022-05-09 17:21:47 6660 g'>19.0, Rc>19.4, Ic>19.0 ------------------------------------------------------------------------------------------------ T0+ : Elapsed time after the burst T-EXP: Total Exposure time We used PS1 catalog for flux calibration. The magnitudes are expressed in the AB system. The images were processed in real-time through the MITSuME GPU reduction pipeline (Niwano et al. 2021, PASJ, Vol.73, Issue 1, Pages 4-24; https://github.com/MNiwano/Eclaire).

GCN 32057 table
GRB_name	GRB220506A
GCN_number	32057
Detection_method	Konus-Wind Det
t_trigger	6:28:15 UTC
Circular_text	TITLE: GCN CIRCULAR NUMBER: 32057 SUBJECT: Konus-Wind detection of GRB 220506A DATE: 22/05/17 14:27:08 GMT FROM: Dmitry Svinkin at Ioffe Institute D. Svinkin, D. Frederiks, A.Lysenko, A.Ridnaia, A. Tsvetkova, M. Ulanov, and T. Cline, on behalf of the Konus-Wind team, report: The long-duration GRB 220506A (MAXI/GSC detection: Urabe et al., GCN Circ. 32001) was detected by Konus-Wind (KW) in the waiting mode. A Bayesian block analysis of the KW waiting mode data in the 20-1500 keV band reveals a ~6 sigma count rate increase over background in the interval from ~T0-115 s to ~T0-89 s, where T0 = T0(MAXI) = 23295 s UT (06:28:15). The K-W light curve of this burst is available at http://www.ioffe.ru/LEA/GRBs/GRB220506A/ As observed by Konus-Wind, the burst had a fluence of 1.46(-0.10,+1.13)x10^-6 erg/cm2 and a 2.944-s peak flux, measured from ~T0-112 s, of 1.14(-0.28,+0.92)x10^-7 erg/cm2/s (both in the 20 - 1500 keV energy range). Modeling the K-W 3-channel time-integrated spectrum (from ~T0-115 s to ~T0-89 s) by a power law with exponential cutoff (CPL) model dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep) yields alpha > -1.0 and Ep = 110(-16,+70) keV. All the quoted errors are estimated at the 1 sigma confidence level. All the presented results are preliminary.