srclist overlap message for exposure 1 of trigger 1126853
uvot_overlap.pl vrs. 2010-12-20b fem started at 221009d14h18m33s288739usUT
The observation of trigger 1126853 started 2022-10-09T14:13:47.1
Examining file 1126853_g209_uvot_sky_srclist.fits
The exposure ID is 687017627
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (288.2583,19.8018) with a roll angle of 265.1
It is square with sides of 8.03 arc min. for an area of 64.51 sq arc min
The BAT error circle is centered at (288.2630,19.8030) with a radius of 3.000 arc min
This is 0.277 arc min from the center of the uvot region
The area of the BAT error circle is 28.27 sq. arc min
The UVOT/BAT overlap is 28.27 sq. arc min or 1.00 of the BAT error circle
The XRT error circle is centered at (288.2643,19.7712) with a radius of 0.093 arc min
This is 1.868 arc min from the center of the uvot region
The area of the XRT error circle is 0.027 sq. arc min
The UVOT/XRT overlap is 0.027 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 1 of trigger 1126853
find_uvot_ag.pl vrs. 2020-10-30 fem started at 221009d14h18m39s068804usUT
Observation start time is 2022-10-09T14:13:47.1
Examining file 1126853_g209_uvot_catalog_srclist.fits
The exposure ID is 687017627
The exposure is 149.860 sec.
The bin size is 2 pixels
The filter is WHITE
There are 143 detected source(s) for 1126853_g209
Aspect correction adds -0.00039 degrees (-0.092 sec of time = -1.30 arc sec) to RA
Aspect correction adds -0.00032 degrees (-1.14 arcsec) to Dec
Total aspect correction is 1.73 arcsec
Star catalogs centered at 288.2640 , 19.8000 with radius 6.35 arc min.
n_usno: 1586 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.52022
RA DEC Mag Color
bright star 0: 288.22985 (19:12:55.16) 19.79866 (+19:47:55.2) 11.52 USNO-V
Mean distance difference (CAT_DELTA) for 134 matched entries is 0.692" for 1126853_g209
Mean and std. dev of mag. difference (MAG_DELTA) are 2.291 and 0.383 for 1126853_g209
Found 10 entries without IDs and 1 entries that are acceptable afterglow candidates for 1126853_g209.
Acceptable entries have no ID, XRT distances < 14", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
6 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=288.2630 (19:13:03.12) DEC=19.8030 (+19:48:10.8)
XRT distances are from RA=288.2643 (19:13:03.43) DEC=19.7712 (+19:46:16.3)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1126853_g209 with 3x3 stamp
ra=288.26454 (19:13:03.49) dec=19.77357 (+19:46:24.9) +/- 1.1" mag=17.33+/-0.35
dist=8.6 REFID=13
src: 0 distr. of nearby unmatched sources: 0 0 0 0 0
Found 7 entries in star catalog(s) within 20.0" of the candidate.
printing all entries
(Entries within 2 arc sec of a source list entry are considered a match)
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
288.2663 19.7787 19.2 -1 USNO-B1 99.99 18.14 99.99
288.2680 19.7765 15.8 -1 USNO-B1 20.47 17.95 19.07
288.2684 19.7763 16.4 -1 USNO-B1 20.67 16.91 18.58
288.2625 19.7749 8.3 -1 USNO-B1 20.63 17.80 19.05
288.2631 19.7731 5.2 -1 USNO-B1 20.54 17.05 18.60
288.2600 19.7727 15.6 -1 USNO-B1 16.46 14.41 15.32
288.2643 19.7715 7.4 -1 USNO-B1 20.56 18.48 19.41
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
Found 2 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
288.2631 19.7731 7.9 -1 USNO-B1 20.54 17.05 18.60
288.2643 19.7715 1.2 -1 USNO-B1 20.56 18.48 19.41
The closest star is 1.20" away.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=288.26454 (19:13:03.49) dec=19.77357 (+19:46:24.9) +/- 1.1" mag=17.33+/-0.35 dist=8.6 REFID=13
There are no candidates inside BAT error circle, but outside XRT error circle.
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.22, XRT distances < 14",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
Region file: /Home/eud/uvot_tdrss/swift/uvot_gcn/src_1126853_XRT.reg
# Region file format: DS9 version 3.0
# find_uvot_ag.pl vrs. 2020-10-30 fem XRT
global font="helvetica 12 bold" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source=1
fk5;circle(288.2643,+19.7712,5.6") # color=red dash=0
point(288.26391,19.77088) # point=diamond 10 color=red width=2
srclist paragraph message for exposure 1 of trigger 1126853
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB221009 (Swift/BAT trigger 1126853) at 14:10:17 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 179 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 19:13:03.49 = 288.26454
DEC(J2000) = +19:46:24.9 = 19.77357
with a 90%-confidence error radius of about 1.10 arc sec. This position is 8.6
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.33. No correction has been made for the large, but uncertain, extinction
expected.
------- notes for trigger 1126853 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 221009d14h18m42s576222usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1126853
-expid=687017627 -msg_srclist
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/1126853/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for bat position. Unreliable extinction found for
xrt position. XRT position found for srclist. BAT position found.
UVOT exposure began at MET 687017627.09264 or about 2022:282:14:13:42 UT
Found 1582 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 27% of the srclist region. Found 143 sources in
srclist catalog. Found 10 srclist source(s) without IDs. There are 1 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 mag.
All AG candidates sorted by magnitude for the current finding chart.
(U/V/White SRCLIST mags < 17.5/17.5/18.5 are reliable. Mag > 18.5/18.5/19.5 are
not. Others are uncertain.)
(U/V/White Genie image mags < 18.0/18.0/19.0 are reliable. Mag > 19.0/19.0/20.0
are not. Others are uncertain.)
(Magnitudes followed by * have been corrected for exposure.)
---MET--- -dt- filter ---RA-- ---DEC--- -MAG/Limit Dist(") Source Asp.Corr?
687017627 179 WHITE 288.26454 19.77357 17.33/19.2 8.6 srclist Yes
687017627 179 WHITE image data are not available.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 19.77357
GRB_ERROR: 1.10
GRB_RA: 288.26454
IMAGE_START_TIME: 14:13:42
MAGNITUDE: 17.33
MAG_ERROR: 0.4
MESSAGE_TYPE: ACK
SOURCE: XRT