| Summary table |
|---|
| Variable |
Value |
Source |
| T0 |
4:39:29 UTC |
GCN_circulars,Swift Det |
| ra |
103.1257° |
Swift |
| decl |
72.1411° |
Swift |
| pos_error |
3.24e-04° |
Swift |
| T90 |
4.4 s |
Swift |
| T90_start |
4:39:29 UTC |
Swift |
| fluence |
1.30e-07 erg/cm² |
Swift |
| T100 |
4.4 s |
|
| GBM_located |
False |
|
| mjd |
59768.194085648145 |
GCN_circulars,Swift Det |
| IPN table |
|---|
| GRB_name |
GRB220708A |
| ra |
103.1167° |
| decl |
72.1833° |
| pos_error |
5.00e-02° |
| Swift table |
|---|
| GRB_name |
GRB220708A |
| t_trigger |
4:39:29 UTC |
| ra |
103.1257° |
| decl |
72.1411° |
| pos_error |
3.24e-04° |
| T90 |
4.4 s |
| fluence |
1.30e-07 erg/cm² |
| GCN 32343 table |
|---|
| GRB_name |
GRB220708A |
| GCN_number |
32343 |
| Detection_method |
Swift Det |
| t_trigger |
4:39:29 UTC |
| ra |
103.1180° |
| decl |
72.1910° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 32343
SUBJECT: GRB 220708A: Swift detection of a burst
DATE: 22/07/08 04:54:20 GMT
FROM: Valerio D'Elia at ASDC
V. D'Elia (SSDC & INAF-OAR), A. D'Ai (INAF-IASFPA), T. Sakamoto (AGU)
and M. H. Siegel (PSU) report on behalf of the Neil Gehrels Swift
Observatory Team:
At 04:39:29 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 220708A (trigger=1115156). Swift did not slew immediately to the burst.
The BAT on-board calculated location is
RA, Dec 103.118, +72.191 which is
RA(J2000) = 06h 52m 28s
Dec(J2000) = +72d 11' 28"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve showed several peaks
with a duration of about 40 sec. The peak count rate
was ~1300 counts/sec (15-350 keV), at ~2 sec after the trigger.
Due to an observing constraint, Swift will not slew until T0+36.8
minutes. There will be no XRT or UVOT data until this time.
Burst Advocate for this burst is V. D'Elia (valerio.delia AT ssdc.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/)
|
| GCN 32344 table |
|---|
| GRB_name |
GRB220708A |
| GCN_number |
32344 |
| Detection_method |
Swift-XRT Other |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 32344
SUBJECT: GRB 220708A: Swift-XRT observations
DATE: 22/07/08 06:02:25 GMT
FROM: Phil Evans at U of Leicester
M. Perri (SSDC & INAF-OAR), G. Tagliaferri (INAF-OAB), P.A. Evans (U.
Leicester), J.P. Osborne (U. Leicester), D.N. Burrows (PSU) and J.A.
Kennea (PSU) report on behalf of the Swift-XRT team:
The XRT began observing the field of GRB 220708A at 05:20:39.0 UT,
2469.3 seconds after the BAT trigger. No source was detected in 767 s
of promptly downlinked data, which covered 94% of the BAT error circle.
We are waiting for the full dataset to detect and localise the XRT
counterpart.
|
| GCN 32347 table |
|---|
| GRB_name |
GRB220708A |
| GCN_number |
32347 |
| Detection_method |
Swift-XRT Det |
| ra |
103.1257° |
| decl |
72.1411° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 32347
SUBJECT: GRB 220708A: Enhanced Swift-XRT position
DATE: 22/07/08 13:27:53 GMT
FROM: Phil Evans at U of Leicester
J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester)
report on behalf of the Swift-XRT team.
Using 1178 s of XRT Photon Counting mode data and 2 UVOT
images for GRB 220708A, 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 = 103.12570, +72.14111 which is equivalent
to:
RA (J2000): 06h 52m 30.17s
Dec (J2000): +72d 08' 28.0"
with an uncertainty of 2.6 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 32349 table |
|---|
| GRB_name |
GRB220708A |
| GCN_number |
32349 |
| Detection_method |
Optical |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 32349
SUBJECT: GRB 220708A: BOOTES-5/JGT early optical upper limit
DATE: 22/07/08 14:25:49 GMT
FROM: Youdong HU at IAA-CSIC
Y.-D. Hu, E. Fernandez-Garcia, A. J. Castro-Tirado, I. Perez-Garcia, 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 220708A by Swift (D'Elia et al. GCNC 32343), the BOOTES-5/JGT 0.6m robotic telescope at Observatorio Astronomico Nacional in San Pedro Martir (Mexico) observed the GRB location starting on Jul 08, 04:40:14 UT (~ 45 s after trigger). In the early co-added image (30 x 10 s exposures in the clear filter), no optical afterglow is detected within the enhanced Swift/XRT error region (Osborne et al. GCNC 32347) down to 20.5 mag.
We thank the staff at Observatorio Astronomico Nacional in San Pedro Martir for their excellent support.
|
| GCN 32352 table |
|---|
| GRB_name |
GRB220708A |
| GCN_number |
32352 |
| Detection_method |
Swift-XRT Other |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 32352
SUBJECT: GRB 220708A: Swift-XRT refined Analysis
DATE: 22/07/08 20:22:18 GMT
FROM: Phil Evans at U of Leicester
A. Tohuvavohu (U. Toronto), J.P. Osborne (U. Leicester), K.L. Page (U.
Leicester), P. D'Avanzo (INAF-OAB), M.G. Bernardini (INAF-OAB), E.
Ambrosi (INAF-IASFPA) , B. Sbarufatti (PSU), D.N. Burrows (PSU),
and V. D'Elia report on behalf of the Swift-XRT team:
We have analysed 6.3 ks of XRT data for GRB 220708A (D'Elia et al. GCN
Circ. 32343), from 2.5 ks to 49.4 ks after the BAT trigger. The data
comprise 257 s in Windowed Timing (WT) mode with the remainder in
Photon Counting (PC) mode. The enhanced XRT position for this burst was
given by Osborne et al. (GCN Circ. 32347).
The light curve can be modelled with a power-law decay with a decay
index of alpha=1.1 (+nan, -nan).
If the light curve continues to decay with a power-law decay index of
1.1, the count rate at T+24 hours will be 8.8 x 10^-4 count s^-1
The results of the XRT-team automatic analysis are available at
http://www.swift.ac.uk/xrt_products/01115156.
This circular is an official product of the Swift-XRT team.
|
| GCN 32354 table |
|---|
| GRB_name |
GRB220708A |
| GCN_number |
32354 |
| Detection_method |
Swift-UVOT Other |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 32354
SUBJECT: GRB 220708A: Swift/UVOT Upper Limits
DATE: 22/07/09 03:01:38 GMT
FROM: Alexander Belles at PSU/Swift
A. Belles (PSU) and V. D'Elia (SSDC & INAF-OAR)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 220708A
2473 s after the BAT trigger (D'Elia et al., GCN Circ. 32343).
No optical afterglow consistent with the XRT position
(Osborne et al. GCN Circ. 32347)
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 first
finding chart (FC) exposure and subsequent exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white_FC 2473 2622 147 >19.8
white 2473 8325 402 >20.2
v 2934 3134 197 >18.9
b 2680 3954 216 >20.1
u 2655 3749 216 >19.9
w1 2630 3544 216 >19.3
m2 3139 3339 197 >19.3
w2 2730 2930 197 >19.5
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.169 in the direction of the burst
(Schlegel et al. 1998).
|
| GCN 32361 table |
|---|
| GRB_name |
GRB220708A |
| GCN_number |
32361 |
| Detection_method |
Swift-BAT Det |
| ra |
103.0380° |
| decl |
72.1990° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 32361
SUBJECT: GRB 220708A: Swift-BAT refined analysis
DATE: 22/07/10 21:10:28 GMT
FROM: Takanori Sakamoto at AGU
S. D. Barthelmy (GSFC), D'Elia (SSDC & INAF-OAR),
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), T. Sakamoto (AGU), M. Stamatikos (OSU)
(i.e. the Swift-BAT team):
Using the data set from T-239 to T+1566 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 220708A (trigger #1115156)
(D'Elia, et al., GCN Circ. 32343). The BAT ground-calculated position is
RA, Dec = 103.038, 72.199 deg which is
RA(J2000) = 06h 52m 09.1s
Dec(J2000) = +72d 11' 57.4"
with an uncertainty of 2.2 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 75%.
The BAT mask-weighted light curve shows a peak starting from T-1 s to T+3 s.
T90 (15-350 keV) is 4.4 +- 1.0 sec (estimated error including systematics).
The time-averaged spectrum from T-1.55 to T+3.44 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
2.31 +- 0.32. The fluence in the 15-150 keV band is 1.3 +- 0.3 x 10^-7 erg/cm2.
The 1-sec peak photon flux measured from T+1.54 sec in the 15-150 keV band
is 0.8 +- 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/1115156/BA/
|