GRB 220514A
GCN Circular 32095
Subject
GRB 220514A: Swift/BAT-GUANO detection outside the coded FOV
Date
2022-05-23T18:28:42Z (3 years ago)
From
Aaron Tohuvavohu at U Toronto <aaron.tohu@gmail.com>
Aaron Tohuvavohu (U Toronto), Gayathri Raman (PSU), James DeLaunay
(UAlabama), Jamie A. Kennea (PSU), report:
Swift/BAT did not localize GRB 220514A onboard (T0:
2022-05-14T12:24:32 UTC, Fermi/GBM GCN 32038, INTEGRAL GCN 32041,
AstroSat GCN 32070, GECAM detection).
The Fermi, INTEGRAL, and GECAM notices, distributed in near real-time,
triggered the Swift Mission Operations Center operated Gamma-ray
Urgent Archiver for Novel Opportunities (GUANO; Tohuvavohu et al.
2020, ApJ, 900, 1).
Upon trigger by this notice, GUANO sent a command to the Swift Burst
Alert Telescope (BAT) to save 200 seconds of BAT event-mode data from
[-50,+150] seconds around the time of the burst. All the requested
event mode data was delivered to the ground.
The BAT likelihood search, NITRATES (DeLaunay + Tohuvavohu,
arXiv:2111.01769), detects the burst with a sqrt(TS) of 24.9 in a
16.384 s analysis time bin.
The burst episode as seen by BAT is >50 s long.
NITRATES results indicate a burst coming from outside the coded FoV,
with DeltaLLHOut of -29.7. The most likely sky position from NITRATES
agrees well with the INTEGRAL/IBAS position (GCN 32041).
See Section 9.1 and Figure 20 in the NITRATES paper for brief
descriptions and interpretation of sqrt(TS), DeltaLLHPeak, and
DeltaLLHOut.
GUANO is a fully autonomous, extremely low latency, spacecraft
commanding pipeline designed for targeted recovery of BAT event mode
data around the times of compelling astrophysical events to enable
more sensitive GRB searches.
A live reporting of Swift/BAT event data recovered by GUANO can be
found at: https://www.swift.psu.edu/guano/
GCN Circular 32070
Subject
GRB 220514A: AstroSat CZTI detection
Date
2022-05-20T05:16:27Z (3 years ago)
From
Gaurav Waratkar at IIT,Bombay <gauravwaratkar@iitb.ac.in>
R. Gopalakrishnan (IUCAA), V. Prasad (IUCAA), G. Waratkar (IITB), A.
Vibhute (IUCAA), V. Bhalerao (IITB), D. Bhattacharya (IUCAA), A. R. Rao
(IUCAA/TIFR), and S. Vadawale (PRL) report on behalf of the AstroSat
CZTI collaboration:
Analysis of AstroSat CZTI data with the CIFT framework (Sharma et al.,
2021, JApA, 42, 73) showed detection of a long GRB 220514A, which was
also reported by Fermi GBM ( GCN 32028), INTEGRAL (Mereghetti et al.,
GCN 32041) and BALROG ( Biltzinger et al. GCN 32029).
The source was clearly detected in the 20-200 keV energy range. The
light curve showed multiple peaks of emission with the strongest peak at
2022-05-14 at 12:24:58.50 UT. The measured peak count rate associated
with the burst is 346 (+51, -30) counts/s above the background in the
combined data of four quadrants, with a total of 4001 (+588, -793)
counts. The local mean background count rate was 561 (+2, -3) counts/s.
Using cumulative rates, we measure a T90 of 54 (+9, -5) s.
It was also clearly detected in the CsI anticoincidence (Veto) detector
in the 100-500 keV energy range. The light curve peaks at 2022-05-14 at
12:24:57.99 UT. The measured peak count rate is 401 (+75, -80) counts/s
above the background in the combined Veto data of four quadrants, with a
total of 2095 (+596, -592) counts. The local mean background count rate
was 1935 (+3, -4) counts/s. We measure a T90 of 29 (+4, -8) s from the
cumulative Veto light curve.
This is the 500th GRB detected by AstroSat CZTI since its launch in
September 2015, with an average rate of 75 GRBs/year.
CZTI GRB detections are reported regularly on the payload site at
http://astrosat.iucaa.in/czti/?q=grb. CZTI is built by a TIFR-led
consortium of institutes across India, including VSSC, ISAC, IUCAA, SAC,
and PRL. The Indian Space Research Organisation funded, managed, and
facilitated the project.
GCN Circular 32059
Subject
GRB 220514A: MITSuME Akeno optical observation
Date
2022-05-18T03:30:34Z (3 years ago)
From
Katsuhiro L. Murata at Nagoya U <murata@u.phys.nagoya-u.ac.jp>
K. L. Murata, R. Hosokawa, Y. Imai, N. Ito, M. Sasada, M. Niwano, Y.
Takamatsu, S. Sato, M. Tateda, T. Hattori, Y. Yatsu, and N. Kawai (Tokyo
Tech) report on behalf of the MITSuME collaboration:
We observed the field of GRB 220514A (Fermi GBM team et al. GCN Circular
#32038, Biltzinger et al. GCN Circular #32039, Mereghetti et al. GCN
Circular #32041, Lipunov et al. GCN Circular #32042, de Wet et al. GCN
Circular #32044, Zheng et al. GCN Circular #32051, Bissaldi et al. GCN
Circular #32054, Yan et al. GCN Circular #32058) 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 2022-05-14
12:25:15 UT(47 seconds after the Fermi/GBM trigger). We stacked the images
with good conditions. Here we report magnitudes by the forced-photometry at
the position of the optical afterglow (GCN Circulars # 32044, #32051,
#32058) and 5-sigma limits.
T0+[hour] |MID-UT | T-EXP[sec] | magnitudes of forced-photometry | 5-sigma
limits
------------------------------------------------------------------------------------------------
0.77 | 2022-05-14 13:10:41 | 660 | g' = 19.6 +/- 0.9, Rc = 19.3 +/- 0.7, Ic
= 18.3 +/- 0.5 | g' > 17.7, Rc > 18.0, Ic > 17.5
------------------------------------------------------------------------------------------------
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 Circular 32058
Subject
GRB 220514A: GRANDMA Optical Afterglow Observations
Date
2022-05-17T21:18:06Z (3 years ago)
From
Cristina Andrade at UMN <andra104@umn.edu>
S. Yan (THU), C. Andrade (UMN), S. Beradze (AbAO), P.A. Duverne (IJCLAB),
K. Kruiswijk (UCLouvain), G. Raaijmakers (GRAPPA), M. Vardosanidze (AbAO),
D. Turpin (CEA/Irfu, Saclay), M. Pilloix, S. Antier,
A. de Ugarte Postigo (CNRS-OCA-ARTEMIS), D. A. Kann (IAA-CSIC), A. Simon,
A. Baransky (Kyiv Univ), V. Godunova (IC ICAMER), R. Inasaridze,
R. Natsvlishvili, N. Kochiashvili, V. Aivazyan, G. Kapanadze,
D. Datashvili (AbAO), C. Rinner, Z. Benkhaldoun (OUCA), M. Freeberg (KNC),
A. Kaouech (OUCA/KNC), F. Guo, X. Wang, S. X. Wang (THU), Y. Wang (NAOC),
S. Karpov, M. Masek, M. Prouza (FZU)
report on behalf of the GRANDMA collaboration:
The GRANDMA telescope network responded to the alert of GRB 220514A
(Fermi GBM team GCN 32038, Biltzinger et al. GCN 32039, S.
Mereghetti et al. GCN 32041).
The first observations were obtained with TNT, starting
1.57 h after the Fermi/GBM and INTEGRAL/IBAS trigger time, in which we
detect the afterglow.
We furthermore detect the optical afterglow with MOSS 7.95h after trigger
at a magnitude of 20.18 +/- 0.15 mag in a Clear image. The afterglow is
also detected in a stack by the 2.2m CAHA equipped with the CAFOS
instrument 9.58h after trigger in the i' band at 19.86 +/- 0.16 mag.
Upper limits are given at 3 sigma.
The following table displays part of our photometry with magnitudes
given in the AB system and calibrated with respect to field stars from
the Pan-STARRS and APASS catalogs, using the MUPHOTEN pipeline (Duverne et
al. 2021). The FRAM image has been calibrated versus GAIA DR2 G magnitudes.
T-T0 (hr)| MJD | Observatory| Exposure | Filter | Mag +/- err (AB)
________________________________________________________________
1.57 |59713.58235| TNT | 3 x 300 s | r' | 18.84 +/- 0.07
7.66 |59713.83624| AbAO-T70 | 9 x 60 s | R | > 16.9
7.95 |59713.84841| MOSS |45 x 60 s | Clear | 20.18 +/- 0.15
8.23 |59713.86003| KNC-HAO |15 x 120 s | R | > 19.4
8.50 |59713.86140| FRAM |15 x 120 s | Clear | > 18.5
9.58 |59713.91610| CAHA/CAFOS |10 x 150 s | i' | 19.86 +/- 0.16
15.06 |59714.14438| KNC-T21 |17 x 180 s | Rc | > 19.3
T-T0 is the delay between the start of the observation and the IBAS
trigger time.
The detections and upper limits are consistent with previous reports of
detections by MeerLICHT (de Wet et al. GCN 32044) and KAIT (Zheng et al.
GCN 32051) and upper limits by MASTER (Lipunov et al. GCN 32042 & GCN
32043).
GRANDMA is a worldwide telescope network (grandma.ijclab.in2p3.fr)
devoted to the observation of transients in the context of multi-messenger
astrophysics (Antier et al. 2020 MNRAS 497, 5518). Kilonova-Catcher (KNC) is
the citizen science program of GRANDMA (http://kilonovacatcher.in2p3.fr/).
GCN Circular 32054
Subject
GRB 220514A: Fermi GBM observation
Date
2022-05-16T15:41:54Z (3 years ago)
From
Elisabetta Bissaldi at INFN,Bari <elisabetta.bissaldi@ba.infn.it>
E. Bissaldi (Politecnico and INFN Bari) and C. Meegan (UAH)
report on behalf of the Fermi GBM Team:
"At 12:24:32.64 UT on 14 May 2022, the Fermi Gamma-Ray Burst Monitor (GBM)
triggered and located GRB 220514A (trigger 674223877 / 220514517),
which was also detected by INTEGRAL (Mereghetti et al. 2022, GCN 32041).
The Fermi GBM Final Real-time Localization has been reported in GCN 32038.
The angle from the Fermi LAT boresight
at the GBM trigger time is 102 degrees.
The GBM light curve shows multiple peaks
with a duration (T90) of about 66 s (50-300 keV).
The time-averaged spectrum from T0-2.8 s to T0+64.8 s is
best fit by a Band function with Epeak = 139 +/- 21 keV,
alpha = -1.25 +/- 0.06, and beta = -1.92 +/- 0.06.
The event fluence (10-1000 keV) in this time interval is
(3.0 +/- 0.1)E-05 erg/cm^2. The 1-sec peak photon flux measured
starting from T0+28.9 s in the 10-1000 keV band
is 16.6 +/- 0.5 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 Circular 32051
Subject
GRB 220514A: KAIT Optical Afterglow Confirmation
Date
2022-05-16T05:57:18Z (3 years ago)
From
Weikang Zheng at UC Berkeley <weikang@berkeley.edu>
WeiKang Zheng and Alexei V. Filippenko (UC Berkeley) report on
behalf of the KAIT GRB team:
The 0.76-m Katzman Automatic Imaging Telescope (KAIT), located at
Lick Observatory, responded to GRB 220408A detected by Fermi/GBM
(Fermi GBM Team, GCN 32038) and INTEGRAL (Mereghetti et al., GCN 32041),
starting at 04:21:03 UT, May 15th. Observations were performed
in the clear (roughly R) filter, and the exposure time was 60s per image,
with a total of 64 images were obtained. We marginally detected the
optical afterglow reported by de Wet et al. (GCN 32044) in our coadd image
in clear band, which we measured its brightness of 20.7 +/- 0.3 mag at a
mid time of ~0.69 days after the burst, calibrated to the Pan-STARRS1
catalog.
GCN Circular 32044
Subject
GRB 220514A: MeerLICHT optical afterglow candidate
Date
2022-05-14T21:47:44Z (3 years ago)
From
Simon de Wet at UCT <dwtsim002@myuct.ac.za>
S. de Wet (UCT), P.M. Vreeswijk (Radboud) and D.B. Malesani (Radboud and
DAWN/NBI) report on behalf of the MeerLICHT consortium:
Following the detection of GRB 220514A by Fermi/GBM (Fermi GBM Team, GCN
32038) and INTEGRAL (Mereghetti et al., GCN 32041), the 0.6m wide-field
MeerLICHT telescope, located at Sutherland, South Africa obtained two 300 s
exposures of a field containing the INTEGRAL position in the q-band
beginning 6.75 hours after the GRB trigger. Based on an existing MeerLICHT
reference image of this field, we detect a new transient candidate within
the INTEGRAL error box with AB magnitude q = 19.89 +\- 0.13 at coordinates:
RA (J2000) = 09:50:39.73 (147.66556d)
Dec (J2000) = 13:09:22.61 (+13.15628d)
calibrated against Gaia DR2. This position is 33" from the centre of the
INTEGRAL error box, and no source is visible at the transient position in
Pan-STARRS images of the field. We suggest this may be the optical
afterglow to GRB 220514A. Further follow-up is encouraged.
MeerLICHT is built and run by a consortium consisting of Radboud
University, University of Cape Town, the South African Astronomical
Observatory, the University of Oxford, the University of Manchester and the
University of Amsterdam.
GCN Circular 32042
Subject
Fermi GRB 220514A: Global MASTER-Net observations report
Date
2022-05-14T15:15:15Z (3 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
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-Amur robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the Fermi GRB 220514A ( Fermi GBM team, GCN 32038) errorbox 7965 sec after notice time and 8004 sec after trigger time at 2022-05-14 14:37:57 UT, with upper limit up to 14.6 mag. The observations began at zenith distance = 68 deg. The sun altitude is -20.5 deg.
The galactic latitude b = 44 deg., longitude l = 221 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=1972926
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
8035 | 2022-05-14 14:37:57 | MASTER-Amur | (09h 44m 35.45s , +14d 11m 35.3s) | C | 60 | 14.6 |
8439 | 2022-05-14 14:44:41 | MASTER-Amur | (09h 55m 27.30s , +12d 17m 17.7s) | C | 60 | 13.4 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.
GCN Circular 32041
Subject
GRB 220514A: a long GRB detected by INTEGRAL
Date
2022-05-14T14:11:38Z (3 years ago)
From
Sandro Mereghetti at IASF-Milano/INAF <sandro.mereghetti@inaf.it>
S.Mereghetti (INAF, IASF-Milano), D.Gotz (CEA, Saclay), C.Ferrigno,
E.Bozzo, V.Savchenko (ISDC, Versoix), L.Ducci (IAAT, Germany and ISDC,
Versoix) and J.Borkowski (CAMK, Torun) report:
a gamma-ray burst lasting about 70 s has been detected by IBAS in the
IBIS/ISGRI data at 12:24:25 UT of 2022 May 14.
The refined coordinates (J2000) are:
R.A. = 147.6670 deg
DEC. = +13.1472 deg
with an uncertainty of 1.5 arcmin (90% c.l.).
Due to telemetry saturation, we can estimate only a lower limit of about
4e-6 erg/cm2 on the 20-200 keV fluence. The burst was detected also by the
Fermi/GBM instrument (GCN Circ. 32038).
A plot of the light curve will be posted at
http://ibas.iasf-milano.inaf.it/IBAS_Results.html
GCN Circular 32039
Subject
GRB 220514A: BALROG localization (Fermi Trigger 674223877 / GRB 220514517)
Date
2022-05-14T12:48:32Z (3 years ago)
From
Jochen Greiner at MPE,Garching <jcg@mpe.mpg.de>
B. Biltzinger, F. Kunzweiler, F. Berlato, J. Burgess & J. Greiner (all MPE Garching) report:
The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
674223877 at 12:24:32 on 14 May 2022 were automatically fitted for spectrum
and sky location with BALROG (Burgess et al. 2018, MNRAS 476, 1427;
Berlato et al. 2019, ApJ 873, 60).
The best-fit position (1 sigma statistical errors) is:
RA(2000.0) = 145.7+/-0.8 deg
Decl.(2000.0) = 11.6+/-1.6 deg
We estimate an additional systematic error of 2 deg.
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB220514517/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB220514517/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB220514517/json
GCN Circular 32038
Subject
GRB 220514A: Fermi GBM Final Real-time Localization
Date
2022-05-14T12:34:56Z (3 years ago)
From
Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>
The Fermi GBM team reports the detection of a likely LONG GRB
At 12:24:32 UT on 14 May 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220514A (trigger 674223877.638218 / 220514517).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 145.6, Dec = 13.6 (J2000 degrees, equivalent to J2000 09h 42m, 13d 35'), with a statistical uncertainty of 1.8 degrees.
The angle from the Fermi LAT boresight is 102.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220514517/quicklook/glg_skymap_all_bn220514517.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220514517/quicklook/glg_healpix_all_bn220514517.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220514517/quicklook/glg_lc_medres34_bn220514517.gif