| Summary table |
|---|
| Variable |
Value |
Source |
| T0 |
11:15:20 UTC |
GCN_circulars,Swift Det |
| ra |
352.1616° |
Swift |
| decl |
-40.5011° |
Swift |
| pos_error |
1.94e-04° |
Swift |
| T90 |
39.5 s |
Swift |
| T90_start |
11:15:20 UTC |
Swift |
| fluence |
1.10e-06 erg/cm² |
Swift |
| T100 |
39.5 s |
|
| GBM_located |
False |
|
| mjd |
58785.468981481485 |
GCN_circulars,Swift Det |
| IPN table |
|---|
| GRB_name |
GRB191029A |
| ra |
352.1417° |
| decl |
-40.4667° |
| pos_error |
5.00e-02° |
| Swift table |
|---|
| GRB_name |
GRB191029A |
| t_trigger |
11:15:20 UTC |
| ra |
352.1616° |
| decl |
-40.5011° |
| pos_error |
1.94e-04° |
| T90 |
39.5 s |
| fluence |
1.10e-06 erg/cm² |
| GCN 26088 table |
|---|
| GRB_name |
GRB191029A |
| GCN_number |
26088 |
| Detection_method |
Swift Det |
| t_trigger |
11:15:20 UTC |
| ra |
352.1400° |
| decl |
-40.4640° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 26088
SUBJECT: GRB 191029A: Swift detection of a burst
DATE: 19/10/29 11:40:59 GMT
FROM: Kim Page at U.of Leicester
P. A. Evans (U Leicester), J.D. Gropp (PSU), J. A. Kennea (PSU),
N. J. Klingler (PSU), K. L. Page (U Leicester) and
A. Tohuvavohu (Toronto) report on behalf of the Neil Gehrels Swift
Observatory Team:
At 11:15:20 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 191029A (trigger=932058). Swift did not slew immediately
because of an observing constraint.
The BAT on-board calculated location is
RA, Dec 352.140, -40.464 which is
RA(J2000) = 23h 28m 34s
Dec(J2000) = -40d 27' 49"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve showed a multi-peaked
structure with a duration of about 40 sec. The peak count rate
was ~1080 counts/sec (15-350 keV), at ~2 sec after the trigger.
Due to an observing constraint, Swift will not slew until T0+48.5
minutes. There will be no XRT or UVOT data until this time.
Burst Advocate for this burst is P. A. Evans (pae9 AT star.le.ac.uk).
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 26090 table |
|---|
| GRB_name |
GRB191029A |
| GCN_number |
26090 |
| Detection_method |
Swift-XRT Other |
| ra |
352.1597° |
| decl |
-40.5003° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 26090
SUBJECT: GRB 191029A: Swift-XRT observations
DATE: 19/10/29 13:00:49 GMT
FROM: Phil Evans at U of Leicester
J.P. Osborne (U. Leicester), D.N. Burrows (PSU), J.A. Kennea (PSU), G.
Cusumano (INAF-IASF PA), M. Perri (ASDC) and P.A. Evans (U. Leicester)
report on behalf of the Swift-XRT team:
The XRT began observing the field of GRB 191029A at 12:06:55.2 UT,
3095.1 seconds after the BAT trigger. Using promptly downlinked data we
find an uncatalogued X-ray source located at RA, Dec 352.15967,
-40.50028 which is equivalent to:
RA(J2000) = 23h 28m 38.32s
Dec(J2000) = -40d 30' 01.0"
with an uncertainty of 4.2 arcseconds (radius, 90% containment). This
location is 141 arcseconds from the BAT onboard position, within the
BAT error circle. This position may be improved as more data are
received; the latest position is available at
http://www.swift.ac.uk/sper. We cannot determine whether the source is
fading at the present time.
A power-law fit to a spectrum formed from promptly downlinked event
data gives a column density consistent with the Galactic value of 1.78
x 10^20 cm^-2 (Willingale et al. 2013).
|
| GCN 26091 table |
|---|
| GRB_name |
GRB191029A |
| GCN_number |
26091 |
| Detection_method |
Optical |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 26091
SUBJECT: GRB 191029A: iTelescope optical upper limits
DATE: 19/10/29 17:39:05 GMT
FROM: Filipp Dmitrievich Romanov at Amateur astronomer
I observed the field of GRB 191029A (Evans et al., GCN #26088) with remote
telescope T30 (0.50-m f/6.8 reflector + CCD) of iTelescope.Net in Siding
Spring Observatory, Australia. Two images with a luminance filter were
obtained on 2019-10-29 13:16:48 UT (7288 seconds after trigger) with 60
seconds exposure time and on 13:18:46 UT (7406 seconds after trigger) with
120 seconds exposure time (the average time of each exposure). I did not
detect any optical transients (magnitude limit of about 19.2 G from Gaia
DR2 catalogue).
|
| GCN 26092 table |
|---|
| GRB_name |
GRB191029A |
| GCN_number |
26092 |
| Detection_method |
Optical |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 26092
SUBJECT: GRB 191029A: BOOTES-4/MET optical limit
DATE: 19/10/29 17:51:04 GMT
FROM: Alberto J. Castro-Tirado at IAA-CSIC
Y.-D. Hu, E. Fernandez-Garcia, A. J. Castro-Tirado (IAA-CSIC), C. Perez
del Pulgar, A. Castellon, I. Carrasco, A. Reina (Univ. de Malaga), S.
Guziy (Univ. of Nikolaev), D. Xiong, Y. Fan, X. Zhao, J. Bai, C. Wang
and Y. Xin (Yunnan Nacional Astronomical Observatory), on behalf of a
larger collaboration, report:
Following the detection of GRB 191029A by Swift (Evans et al. GCNC
26088), the 0.6m BOOTES-4/MET robotic telescope at Lijiang Astronomical
Observatory (China) automatic slewed to the GRB position and gathered
g-band images starting at 11:31:27 UT (0.26 h after trigger, once the
field became reachable). No optical afterglow is found down to 19.2 mag
(at 0.9 h median time after trigger). Once the XRT position was
available, we also took several images (clear filter) starting at 13:38
UT. No optical afterglow was found down to 20.3 mag (at 2.5 h median
time post trigger) at the enhaced XRT position (Osborne et al. GCNC
26090). This is in agreement with Romanov et al. (GCNC 26091).
We thank the staff at Lijiang Observatory for their excellent support.
|
| GCN 26094 table |
|---|
| GRB_name |
GRB191029A |
| GCN_number |
26094 |
| Detection_method |
Swift-XRT Other |
| ra |
352.1492° |
| decl |
-40.5661° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 26094
SUBJECT: GRB 191029A: Swift-XRT refined Analysis
DATE: 19/10/29 22:49:41 GMT
FROM: Phil Evans at U of Leicester
P. D'Avanzo (INAF-OAB), J.A. Kennea (PSU), B. Sbarufatti (PSU), D.N.
Burrows (PSU), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester),
M.G. Bernardini (INAF-OAB), E. Ambrosi (INAF-IASFPA) and P.A. Evans
report on behalf of the Swift-XRT team:
We have analysed 9.0 ks of XRT data for GRB 191029A (Evans et al. GCN
Circ. 26088), from 4.0 ks to 27.7 ks after the BAT trigger. The data
are entirely in Photon Counting (PC) mode. The refined XRT position is
RA, Dec = 352.1492, -40.5661 which is equivalent to:
RA (J2000): 23 28 35.80
Dec(J2000): -40 33 58.0
with an uncertainty of 3.6 arcsec (radius, 90% confidence). The light
curve is consistent with a constant source of mean count rate 8.2e-02
ct/sec. A power-law fit gives an index of 0.08 (+0.12, -0.13).
A spectrum formed from the PC mode data can be fitted with an absorbed
power-law with a photon spectral index of 1.54 (+0.16, -0.10). The
best-fitting absorption column is 1.92 (+3.90, -0.14) x 10^20 cm^-2,
consistent with the Galactic value of 1.8 x 10^20 cm^-2 (Willingale et
al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux
conversion factor deduced from this spectrum is 3.9 x 10^-11 (4.0 x
10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
Total column: 1.92 (+3.90, -0.14) x 10^20 cm^-2
Galactic foreground: 1.8 x 10^20 cm^-2
Excess significance: <1.6 sigma
Photon index: 1.54 (+0.16, -0.10)
The results of the XRT-team automatic analysis are available at
http://www.swift.ac.uk/xrt_products/00932058.
This circular is an official product of the Swift-XRT team.
|
| GCN 26095 table |
|---|
| GRB_name |
GRB191029A |
| GCN_number |
26095 |
| Detection_method |
Swift-XRT Det |
| ra |
352.1614° |
| decl |
-40.5011° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 26095
SUBJECT: GRB 191029A: Enhanced Swift-XRT position
DATE: 19/10/29 23:31:08 GMT
FROM: Phil Evans at U of Leicester
P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester)
report on behalf of the Swift-XRT team.
Using 6396 s of XRT Photon Counting mode data and 12 UVOT
images for GRB 191029A, 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 = 352.16141, -40.50108 which is equivalent
to:
RA (J2000): 23h 28m 38.74s
Dec (J2000): -40d 30' 03.9"
with an uncertainty of 1.5 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 26097 table |
|---|
| GRB_name |
GRB191029A |
| GCN_number |
26097 |
| Detection_method |
Swift-UVOT Other |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 26097
SUBJECT: GRB 191029A: Swift/UVOT Upper Limits
DATE: 19/10/30 05:38:53 GMT
FROM: Samantha Oates at MSSL
S. R. Oates (U.Warwick) and P. A. Evans (U. Leicester)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 191029A
4.3 ks after the BAT trigger (Evans et al., GCN Circ. 26088).
No optical afterglow consistent with the XRT position
(Evans et al. GCN Circ. 26095)
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 4280 22783 1598 >22.1
v 4691 15599 1082 >20.2
b 5510 28520 2353 >21.7
u 5305 21337 1082 >20.9
w1 5100 17046 723 >20.4
m2 4895 16504 1082 >20.6
w2 4486 11309 868 >20.7
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.02 in the direction of the burst
(Schlegel et al. 1998).
|
| GCN 26099 table |
|---|
| GRB_name |
GRB191029A |
| GCN_number |
26099 |
| Detection_method |
Swift-XRT Other |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 26099
SUBJECT: GRB 191029A: CORRECTED Swift-XRT refined analysis
DATE: 19/10/30 09:56:42 GMT
FROM: Phil Evans at U of Leicester
P.A. Evans and K.L. Page (U. Leicester) report on behalf of the
Swift-XRT team:
The XRT refined analysis for GRB 191029A, given in GCN 26094 was
incorrect. There is an AGN within the BAT error circle and unfortunately
the automated light curve and spectral analysis had been performed for
this source, rather than the afterglow.
The correct refined analysis is below. We apologise for any
inconvenience.
We have analysed 13 ks of XRT data for GRB 191029A (Evans et al. GCN
Circ. 26088), from 3.1 ks to 62.0 ks after the BAT trigger. The data
are entirely in Photon Counting (PC) mode. The enhanced XRT position for
this burst was given by Evans et al. (GCN Circ. 26095).
The light curve can be modelled with a power-law decay with a decay
index of alpha=0.77 (+0.13, -0.12).
A spectrum formed from the PC mode data can be fitted with an absorbed
power-law with a photon spectral index of 1.81 (+0.23, -0.19). The
best-fitting absorption column is 3.4 (+5.3, -1.6) x 10^20 cm^-2,
consistent with the Galactic value of 1.8 x 10^20 cm^-2 (Willingale et
al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux
conversion factor deduced from this spectrum is 3.5 x 10^-11 (3.7 x
10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
Total column: 3.4 (+5.3, -1.6) x 10^20 cm^-2
Galactic foreground: 1.8 x 10^20 cm^-2
Excess significance: <1.6 sigma
Photon index: 1.81 (+0.23, -0.19)
The results of the XRT-team automatic analysis are available at
http://www.swift.ac.uk/xrt_products/00932058.
|
| GCN 26110 table |
|---|
| GRB_name |
GRB191029A |
| GCN_number |
26110 |
| Detection_method |
Swift-BAT Det |
| ra |
352.1400° |
| decl |
-40.4640° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 26110
SUBJECT: GRB 191029A: Swift-BAT refined analysis
DATE: 19/10/31 19:46:10 GMT
FROM: Hans Krimm at NSF/NASA-GSFC
A. Y. Lien (GSFC/UMBC), S. D. Barthelmy (GSFC), J. R. Cummings (CPI),
P. A. Evans (U Leicester), H. A. Krimm (NSF), S. Laha (GSFC/UMBC),
C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU),
M. Stamatikos (OSU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):
Using the data set from T-239 to T+240 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 191029A (trigger #932058)
(Evans, et al., GCN Circ. 26088). The BAT ground-calculated position is
RA, Dec = 352.140, -40.464 deg which is
RA(J2000) = 23h 28m 33.6s
Dec(J2000) = -40d -27' -49.8"
with an uncertainty of 1.8 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 46%.
The mask-weighted light curve shows a pair of weak pulses spanning the period
from approximately T-5 to T+35 seconds. T90 (15-350 keV) is 39.5 +- 7.9 sec
(estimated error including systematics).
The time-averaged spectrum from T-1.05 to T+45.85 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
1.77 +- 0.21. The fluence in the 15-150 keV band is 1.1 +- 0.1 x 10^-6 erg/cm2.
The 1-sec peak photon flux measured from T+1.90 sec in the 15-150 keV band
is 1.1 +- 0.3 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/932058/BA/
|