GRB220412B

This page lists all entries on GRB220412B in GRBweb

Summary Fermi GBM IPN Swift GCN 31886 GCN 31889 GCN 31892 GCN 31894 GCN 31897 GCN 31900 GCN 31904 GCN 31908 GCN 31909 GCN 31910 GCN 31917

Summary table
Variable Value Source
GRB_name_Fermi GRB220412713
T0 17:06:49 UTC GCN_circulars,Swift Det
ra 320.7940° Swift
decl -0.2230° Swift
pos_error 2.33e-02° Swift
T90 0.16 s Fermi_GBM
T90_error 0.072 s Fermi_GBM
T90_start 17:06:49.009 UTC Fermi_GBM
fluence 4.33e-07 erg/cm² Fermi_GBM
fluence_error 6.78e-09 erg/cm² Fermi_GBM
T100 0.169 s
GBM_located False
mjd 59681.71306712963 GCN_circulars,Swift Det
Fermi GBM table
GRB_name_Fermi GRB220412713
trigger_name bn220412713
ra 320.7942°
decl -0.2231°
pos_error 6.21e+00°
datum 2022-04-12
t_trigger 17:06:49.041 UTC
T90 0.16 s
T90_error 0.072 s
T90_start 17:06:49.009 UTC
fluence 4.33e-07 erg/cm²
fluence_error 6.78e-09 erg/cm²
flux_1024 2.35e+00 erg/cm²/s
flux_1024_error 1.98e-01 erg/cm²/s
flux_1024_time -5.12e-01 erg/cm²/s
flux_64 1.72e+01 erg/cm²/s
flux_64_error 1.23e+00 erg/cm²/s
IPN table
GRB_name GRB220412B
ra 320.7958°
decl -0.2167°
pos_error 5.00e-02°
Swift table
GRB_name GRB220412B
t_trigger 17:06:49 UTC
ra 320.7940°
decl -0.2230°
pos_error 2.33e-02°
GCN 31886 table
GRB_name GRB220412B
GCN_number 31886
Detection_method Swift Det
t_trigger 17:06:49 UTC
ra 320.7940°
decl -0.2230°
Circular_text TITLE: GCN CIRCULAR NUMBER: 31886 SUBJECT: GRB 220412B: Swift detection of a short burst DATE: 22/04/12 17:26:32 GMT FROM: Jeffrey Gropp at PSU J.D. Gropp (PSU), S. Dichiara (PSU), J. A. Kennea (PSU), N. J. Klingler (GSFC/UMBC/CRESSTII), F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester), T. M. Parsotan (GSFC/UMBC/CRESSTII), B. Sbarufatti (PSU) and M. H. Siegel (PSU) report on behalf of the Neil Gehrels Swift Observatory Team: At 17:06:49 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 220412B (trigger=1102329). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 320.794, -0.223 which is RA(J2000) = 21h 23m 11s Dec(J2000) = -00d 13' 23" 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 0.5 sec. The peak count rate was ~6000 counts/sec (15-350 keV), at ~0 sec after the trigger. The XRT began observing the field at 17:08:13.7 UT, 85.0 seconds after the BAT trigger. No source was detected in the 2.5-s promptly available image. We are waiting for the full dataset to detect and localise the XRT counterpart. UVOT took a finding chart exposure of 130 seconds with the White filter starting 89 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 25% of the BAT 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 BAT 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 0.060. Shortly after the BAT trigger, Swift entered the South Atlantic Anomaly which limited data collection for the first orbit. We are awaiting further observations. Burst Advocate for this burst is J.D. Gropp (jdg44 AT psu.edu). 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/)
GCN 31889 table
GRB_name GRB220412B
GCN_number 31889
Detection_method MITSuME
Circular_text TITLE: GCN CIRCULAR NUMBER: 31889 SUBJECT: GRB 220412B: MITSuME Akeno optical upper limits DATE: 22/04/13 05:34:06 GMT FROM: Katsuhiro L. Murata at Nagoya U K. L. Murata, M. Niwano, Y. Imai, N. Ito, Y. Takamatsu, S. Sato, R. Hosokawa, M. Sasada, Y. Yatsu, and N. Kawai (Tokyo Tech) report on behalf of the MITSuME collaboration: We observed the field of GRB 220412B (Gropp et al. GCN Circular #31886) 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 2022-04-12 18:28:16 UT (82 minutes after the Swift/BAT trigger). We stacked the images with good conditions. We did not detect any uncatalogued sources within the BAT error region (Gropp et al. GCN Circular #31886). We obtained the 5-sigma limits of the stacked images as follows. T0+[min] MID-UT T-EXP[sec] 5-sigma limits ------------------------------------------------------------------------------------------------ 82 2022-04-12 18:55:21 2820 g'>17.9, Rc>19.0, Ic>18.5 ------------------------------------------------------------------------------------------------ T0+ : Elapsed time after the burst T-EXP: Total Exposure time We used the 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 31892 table
GRB_name GRB220412B
GCN_number 31892
Detection_method Optical
ra 320.7940°
decl -0.2230°
Circular_text TITLE: GCN CIRCULAR NUMBER: 31892 SUBJECT: GRB 220412B: GIT optical upper limit DATE: 22/04/13 08:47:40 GMT FROM: Harsh Kumar at Indian Inst of Tech,Bombay H. Kumar (IITB), V. Swain (IITB), R. Norbu (IAO), G. C. Anupama (IIA), V. Bhalerao (IITB), S. Barway (IIA) report on behalf of the GIT team: We observed the short GRB 220412B detected by Swift-BAT (J.D. Gropp et al., GCN #31886) with the 0.7m *GROWTH-India Telescope* (GIT). We obtained multiple 300-sec exposures in the r' filter. We did not detect any new source in our stacked image within the BAT uncertainty region of 3 arcmin circle, around R.A.= 320.794, DEC.= -0.223. The obtained upper limit follows as: ------------------------------------------------------------------------- JD (mid) | T_mid-T0(hrs) | Exposure (sec) | Filter | Lim_mag (5-sigma) | ------------------------------------------------------------------------- 2459682.452891 | 5.75 | 300 x 6 (stacked) | r' | > 20.25 | ------------------------------------------------------------------------- Our upper limit is consistent with results from K. L. Murata et al. (GCN #31889). The magnitudes are calibrated against Pan-STARRS 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 31894 table
GRB_name GRB220412B
GCN_number 31894
Detection_method Swift Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 31894 SUBJECT: Swift GRB 220412B: Global MASTER-Net observations report DATE: 22/04/13 10:16:30 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko, G.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), O.A. Gres, N.M. Budnev (Irkutsk State University, API), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A. Gabovich, V.Yurkov (Blagoveschensk Educational State University) MASTER-OAGH robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Mexico (OAGH National Institute for Astrophysics, Optics and Electronics) was pointed to the Swift GRB 220412B ( J.D. Gropp et al., GCN 31886) errorbox 61446 sec after notice time and 61475 sec after trigger time at 2022-04-13 10:11:24 UT, with upper limit up to 17.5 mag. The observations began at zenith distance = 77 deg. The sun altitude is -32.6 deg. The galactic latitude b = -34 deg., longitude l = 53 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1940975 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 61505 | MASTER-OAGH | C | 60 | 17.5 | 61505 | MASTER-OAGH | C | 60 | 17.3 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.
GCN 31897 table
GRB_name GRB220412B
GCN_number 31897
Detection_method Swift-XRT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 31897 SUBJECT: GRB 220412B: Swift-XRT observations DATE: 22/04/13 18:27:35 GMT FROM: Phil Evans at U of Leicester V. D'Elia (SSDC & INAF-OAR), A. D'Ai (INAF-IASFPA), J. D. Gropp (PSU), J.A. Kennea (PSU), A. Tohuvavohu (U. Toronto), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester), A. Melandri (INAF-OAB) and J.D. Gropp (PSU) report on behalf of the Swift-XRT team: We have analysed 7.8 ks of Photon Counting (PC) mode XRT data for the Swift-BAT-detected burst GRB 220412B (Gropp et al. GCN Circ. 31886), collected between T0+4.7 ks and T0+29.1 ks. No X-ray sources have been detected consistent with being within 296 arcsec of the Swift-BAT position. The 3-sigma upper limit in the field is 0.001 ct s^-1, corresponding to a 0.3-10 keV observed flux of 4.2e-14 erg cm^-2 s^-1 (assuming a typical GRB spectrum). Four uncatalogued sources were detected too far from the GRB position to be likely afterglow candidates. The results of the XRT-team automatic analysis of the XRT observations, including a position-specific upper limit calculator, are available at https://www.swift.ac.uk/ToO_GRBs/01102329. This circular is an official product of the Swift-XRT team.
GCN 31900 table
GRB_name GRB220412B
GCN_number 31900
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 31900 SUBJECT: GRB 220412B: BOOTES-1 optical upper limit DATE: 22/04/14 00:04:34 GMT FROM: Youdong HU at IAA-CSIC Y.-D. Hu, E. Fernandez-Garcia, T.-R. Sun, A. J. Castro-Tirado, M. D. Caballero-Garcia, R. Sanchez-Ramirez (IAA-CSIC), C. Perez del Pulgar, A. Castellon, I. Carrasco, A. Reina (Univ. de Malaga) and F. Rendon (IAA-CSIC and INTA-CEDEA) on behalf of a larger collaboration, report: Following the detection of short GRB 220412B by Swift (Gropp et al., GCNC 31886), the 0.3m BOOTES-1B robotic telescope in Mazagon (Huelva), southern Spain, automatically responded to this burst on Apr 13 at 03:46 UT (~10.7 hours after trigger). In the co-added frame (45 x 60 s, clear filter), no source is detected within the BAT error box (Gropp et al., GCNC 31886) down to 18.8 mag, which is consistent with the non-detections reported by UVOT (Gropp et al., GCNC 31886), MITSuME (Murata et al. GCNC 31889), GIT (Kumar et al. GCNC 31892) and MASTER (Lipunov et al., GCNC 31894). We thank the staff at INTA-CEDEA for their excellent support.
GCN 31904 table
GRB_name GRB220412B
GCN_number 31904
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 31904 SUBJECT: GRB 220412B: TNG optical observations DATE: 22/04/15 17:08:31 GMT FROM: Paolo D'Avanzo at INAF-OAB P. D'Avanzo (INAF-OAB), S. Piranomonte (INAF-OAR), L. Di Fabrizio, H. Stoev (INAF-TNG) on behalf of the CIBO collaboration report: We observed the field of the short GRB 220412B (Gropp et al. GCN Circ. 31886) with the Italian 3.6m TNG telescope equipped with the optical camera DOLORES. A series of images were obtained with the r-sdss filter on 2022-04-13 from 04:42:48 UT to 05:26:37 UT (i.e. at a mid time of about 12 hours after the burst). No clear afterglow candidate is detected within the BAT error (Gropp et al. GCN Circ. 31886). The typical 3sigma limiting magnitude of our co-added image for isolated objects is r ~ 24.2 mag (AB; calibrated against the SDSS catalogue).
GCN 31908 table
GRB_name GRB220412B
GCN_number 31908
Detection_method Fermi GBM Det
t_trigger 17:06:49.040 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 31908 SUBJECT: GRB 220412B: Fermi GBM observation DATE: 22/04/15 20:33:00 GMT FROM: Peter Veres at UAH P. Veres and C. Meegan (both UAH) report on behalf of the Fermi GBM Team: "At 17:06:49.04 UT on 12 April 2022, the Fermi Gamma-Ray Burst Monitor (GBM) triggered and located GRB 220412B (trigger 671476014 / 220412713) which was also detected by the Swift/BAT (Gropp et al., GCN 31886). The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight at the GBM trigger time is 20 degrees. The GBM light curve consists of a single pulse with a duration (T90) of about 0.16 s (50-300 keV). The time-averaged spectrum from T0-32 ms to T0+96 ms is best fit by a power law function with an exponential high-energy cutoff. The power law index is -0.70 +/-0.14 and the cutoff energy, parameterized as Epeak, is 499 +/- 116 keV. The event fluence (10-1000 keV) in this time interval is (4.44 +/- 0.40)E-7 erg/cm^2. The 64-ms peak photon flux measured starting from T0 in the 10-1000 keV band is 17.2 +/- 1.2 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog: https://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html For Fermi GBM data and info, please visit the official Fermi GBM Support Page: https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/"
GCN 31909 table
GRB_name GRB220412B
GCN_number 31909
Detection_method Konus-Wind Det
t_trigger 7:28:05.231 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 31909 SUBJECT: Konus-Wind detection of GRB 220412B DATE: 22/04/15 22:23:55 GMT FROM: Dmitry Svinkin at Ioffe Institute D. Svinkin, D. Frederiks, M. Ulanov, A. Tsvetkova, A. Lysenko, A. Ridnaia, and T. Cline on behalf of the Konus-Wind team, report: The short-duration GRB 220412B (Swift-BAT detection: Gropp et al., GCN Circ. 31886; Fermi-GBM observation: Veres and Meegan, GCN Circ. 31908) triggered Konus-Wind at T0=26885.231 s UT (07:28:05.231). The burst light curve shows a single pulse with a total duration of ~86 ms. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB220412_T61606/ As observed by Konus-Wind, the burst had a fluence of 3.2(-0.1,+1.2)x10^-7 erg/cm2, and a 16-ms peak flux, measured from T0-42 ms, of 1.1(-0.1,+0.4)x10^-5 erg/cm2/s (both in the 20 keV - 10 MeV energy range). Since the main fraction of the burst emission was detected before the trigger, the spectral analysis was performed using the KW 3-channel light curve data. Modelling the KW 3-channel time-integrated spectrum (measured from T0-52 ms to T0+34 ms) by a power law with exponential cutoff model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep), yields alpha = -0.03(-0.47,+0.59) and Ep = 283(-52,+68) keV. All the quoted errors are at the 68% confidence level. All the quoted values are preliminary.
GCN 31910 table
GRB_name GRB220412B
GCN_number 31910
Detection_method Swift-BAT Det
ra 320.7580°
decl -0.2610°
Circular_text TITLE: GCN CIRCULAR NUMBER: 31910 SUBJECT: GRB 220412B: Swift-BAT refined analysis DATE: 22/04/16 12:16:02 GMT FROM: Tyler Parsotan at UMBC/GSFC/CRESST II T. Sakamoto (AGU), S. D. Barthelmy (GSFC), H. A. Krimm (NSF), S. Laha (GSFC/UMBC), A. Y. Lien (U Tampa), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Parsotan (GSFC/UMBC), M. Stamatikos (OSU) (i.e. the Swift-BAT team): Using the data set from T-240 to T+40 sec sec from the recent telemetry downlink, we report further analysis of BAT GRB 220412B (trigger #1102329) (Gropp et al. GCN Circ. 31886). The BAT ground-calculated position is RA, Dec = 320.758, -0.261 deg which is RA(J2000) = 21h 23m 01.9s Dec(J2000) = -00d 15' 38.5" with an uncertainty of 1.6 arcmin, (radius, sys+stat, 90% containment). The partial coding was 75%. The BAT light curve showed a single-peaked structure. T90 (15-350 keV) is 0.14 +- 0.04 sec (estimated error including systematics). The time-averaged spectrum from T-0.03 to T+0.16 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.17 +- 0.20. The fluence in the 15-150 keV band is 8.9 +- 1.2 x 10^-08 erg/cm2. The 1-sec peak photon flux measured from T-0.44 sec in the 15-150 keV band is 1.0 +- 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/1102329/BA/
GCN 31917 table
GRB_name GRB220412B
GCN_number 31917
Detection_method Swift-UVOT Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 31917 SUBJECT: GRB 220412B: Swift/UVOT Upper Limits DATE: 22/04/19 01:41:07 GMT FROM: Mike Siegel at PSU/Swift MOC M. H. Siegel and J. D. Gropp (PSU) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 220412B 89 s after the BAT trigger (Gropp et al., GCN Circ. 31886). No optical afterglow consistent with the BAT position (Sakamoto et al., GCN Circ. 31910) is detected in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the initial exposures are: Filter T_start(s) T_stop(s) Exp(s) Mag white (fc) 89 217 128 >20.0 white 4378 4577 197 >20.3 b 4173 4373 197 >19.8 u 3968 4167 197 >19.4 w2 4584 4663 78 >19.2 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.060 in the direction of the burst (Schlegel et al. 1998).