| Summary table |
|---|
| Variable |
Value |
Source |
| T0 |
12:46:59 UTC |
GCN_circulars,Swift Det |
| ra |
123.5630° |
Swift |
| decl |
-14.5530° |
Swift |
| pos_error |
1.32e-02° |
Swift |
| T90 |
38.9 s |
Swift |
| T90_start |
12:46:59 UTC |
Swift |
| fluence |
9.30e-07 erg/cm² |
Swift |
| T100 |
38.9 s |
|
| GBM_located |
False |
|
| mjd |
59031.53262731482 |
GCN_circulars,Swift Det |
| IPN table |
|---|
| GRB_name |
GRB200701A |
| ra |
123.5542° |
| decl |
-14.5000° |
| pos_error |
5.00e-02° |
| Swift table |
|---|
| GRB_name |
GRB200701A |
| t_trigger |
12:46:59 UTC |
| ra |
123.5630° |
| decl |
-14.5530° |
| pos_error |
1.32e-02° |
| T90 |
38.9 s |
| fluence |
9.30e-07 erg/cm² |
| GCN 28052 table |
|---|
| GRB_name |
GRB200701A |
| GCN_number |
28052 |
| Detection_method |
Swift Det |
| t_trigger |
12:46:59 UTC |
| ra |
123.5550° |
| decl |
-14.4940° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 28052
SUBJECT: GRB 200701A: Swift detection of a burst
DATE: 20/07/01 12:58:38 GMT
FROM: Boris Sbarufatti at PSU
M. G. Bernardini (INAF-OAB), S. D. Barthelmy (GSFC),
P. D'Avanzo (INAF-OAB), J.D. Gropp (PSU), J. A. Kennea (PSU),
A. Y. Lien (GSFC/UMBC), A. Melandri (INAF-OAB),
K. L. Page (U Leicester), T. Sbarrato (INAF-OAB), B. Sbarufatti (PSU)
and M. H. Siegel (PSU) report on behalf of the Neil Gehrels Swift
Observatory Team:
At 12:46:59 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 200701A (trigger=980421). Swift did not slew immediately
due to a Sun observing constraint.
The BAT on-board calculated location is
RA, Dec 123.555, -14.494 which is
RA(J2000) = 08h 14m 13s
Dec(J2000) = -14d 29' 37"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve showed a complex
structure with a duration of about 40 sec. The peak count rate
was ~1000 counts/sec (15-350 keV), at ~1 sec after the trigger.
Due to a Sun observing constraint, Swift cannot slew to the BAT
position until 06:11 UT on 2020 September 07. There will thus be no XRT
or UVOT data for this trigger before this time.
Burst Advocate for this burst is M. G. Bernardini (grazia.bernardini AT brera.inaf.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 28053 table |
|---|
| GRB_name |
GRB200701A |
| GCN_number |
28053 |
| Detection_method |
Fermi GBM Other |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 28053
SUBJECT: Fermi-GBM Sub-Threshold Detection of GRB 200701A
DATE: 20/07/01 22:59:04 GMT
FROM: Christian Malacaria at NASA-MSFC/USRA
C. Malacaria (NASA-MSFC/USRA) reports on behalf of the Fermi-GBM Team:
Swift-BAT detected GRB 200701A at 12:46:59 UT (Bernardini et al. 2020, GCN 28052).
There was no Fermi-GBM onboard trigger around the event.
An automated, blind search for short gamma-ray bursts below the onboard triggering
threshold in Fermi-GBM also identified no counterparts.
The GBM targeted search [1], the most sensitive, coherent search for GRB-like
signals, was run from +/-30 s around BAT trigger time.
A transient source was identified whose most significant timescale according to
the search is 8.192 s, with a log likelihood ratio of 39.
The location is consistent with that from Swift-BAT.
The spectrum is consistent with a "normal" GRB template
(Band function with Epeak = 230 keV, alpha = -1.0, beta = -2.3).
[1] Goldstein et al. 2019 arXiv:1903.12597
|
| GCN 28054 table |
|---|
| GRB_name |
GRB200701A |
| GCN_number |
28054 |
| Detection_method |
Swift-BAT Det |
| ra |
123.5630° |
| decl |
-14.5530° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 28054
SUBJECT: GRB 200701A: Swift-BAT refined analysis
DATE: 20/07/02 02:12:24 GMT
FROM: Amy Lien at GSFC
T. Sakamoto (AGU), S. D. Barthelmy (GSFC),
M. G. Bernardini (INAF-OAB), J. R. Cummings (CPI),
H. A. Krimm (NSF), S. Laha (GSFC/UMBC),
A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC),
D. M. Palmer (LANL), M. Stamatikos (OSU),
T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):
Using the data set from T-60 to T+243 sec from the recent telemetry
downlink,
we report further analysis of BAT GRB 200701A (trigger #980421)
(Bernardini et al., GCN Circ. 28052). The BAT ground-calculated position is
RA, Dec = 123.563, -14.553 deg which is
RA(J2000) = 08h 14m 15.2s
Dec(J2000) = -14d 33' 09.8"
with an uncertainty of 1.7 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 77%.
The mask-weighted light curve shows a single-pulse structure that
starts at ~T-7 s and peaks at ~T0. The main pulse ends at ~T+20 s,
followed by a weak tail that lasts till ~T+40 s. T90 (15-350 keV)
is 38.9 +- 8.6 sec (estimated error including systematics).
The time-averaged spectrum from T-6.81 to T+42.17 sec is best fit
by a simple power-law model. The power law index of the time-averaged
spectrum is 1.91 +- 0.16. The fluence in the 15-150 keV band
is 9.3 +- 1.0 x 10^-7 erg/cm2. The 1-sec peak photon flux measured
from T-1.72 sec in the 15-150 keV band is 0.7 +- 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/980421/BA/
|
| GCN 32307 table |
|---|
| GRB_name |
GRB200701A |
| GCN_number |
32307 |
| Detection_method |
Optical |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 32307
SUBJECT: GRB 200701A: KAIT Optical Upper Limit
DATE: 22/07/01 05:43:36 GMT
FROM: Weikang Zheng at UC Berkeley
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 Swift GRB 200701A (Evans al.,
GCN 32306) starting at 04:57:09 UT, 251 s after the burst.
Observations were performed with an automatic sequence in the
clear (roughly R), V, and I filters, and the exposure time was 20 s
per image. Our first few images were out-focused, and the first useful
focused image started at 05:07:57 UT. In the aftward focused images,
we do not detect any optical afterglow candidate within
the reported XRT position error circle (Evans et al., GCN 32306),
neither in single image, nor in the co-add images.
The typical limiting magnitude of our single clear image is about
18.5 mag calibrated to the Pan-STARRS1 catalog.
|