srclist overlap message for exposure 1 of trigger 1061554
uvot_overlap.pl vrs. 2010-12-20b fem started at 210725d15h35m55s983973usUT
The observation of trigger 1061554 started 2021-07-25T12:02:47.1
Examining file ./1061554_g118_uvot_sky_srclist.fits
The exposure ID is 648907367
The exposure time is undefined.
The filter is U.
The uvot region is centered at (192.9278,17.1244) with a roll angle of 283.8
It is square with sides of 12.05 arc min. for an area of 145.15 sq arc min
The BAT error circle is centered at (192.9320,17.1250) with a radius of 3.000 arc min
This is 0.241 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 (192.9222,17.1081) with a radius of 0.042 arc min
This is 1.034 arc min from the center of the uvot region
The area of the XRT error circle is 0.005 sq. arc min
The UVOT/XRT overlap is 0.005 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 1 of trigger 1061554
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210725d15h35m58s957461usUT
Observation start time is 2021-07-25T12:02:47.1
Examining file ./1061554_g118_uvot_catalog_srclist.fits
The exposure ID is 648907367
The exposure is 249.924 sec.
The bin size is 2 pixels
The filter is U
There are 16 detected source(s) for 1061554_g118
Aspect correction adds -0.00040 degrees (-0.097 sec of time = -1.39 arc sec) to RA
Aspect correction adds 0.00072 degrees ( 2.59 arcsec) to Dec
Total aspect correction is 2.94 arcsec
Star catalogs centered at 192.9275 , 17.1056 with radius 7.60 arc min.
n_usno: 641 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 6.46512
RA DEC Mag Color
bright star 0: 193.05107 (12:52:12.26) 17.07394 (+17:04:26.2) 6.47 USNO-V
Mean distance difference (CAT_DELTA) for 14 matched entries is 0.792" for 1061554_g118
Mean and std. dev of mag. difference (MAG_DELTA) are 0.869 and 0.904 for 1061554_g118
Found 3 entries without IDs and 2 entries that are acceptable afterglow candidates for 1061554_g118.
Acceptable entries have no ID, XRT distances < 6.25", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=192.9320 (12:51:43.68) DEC=17.1250 (+17:07:30.0)
XRT distances are from RA=192.9222 (12:51:41.32) DEC=17.1081 (+17:06:29.1)
-----------------
Entry 1 in the list of sources is a candidate afterglow for 1061554_g118 with 5x5 stamp
ra=192.92987 (12:51:43.17) dec=17.07537 (+17:04:31.3) +/- 1.1" mag=19.99+/-0.35
dist=120.7 REFID=16
*** The position of this source is inconsistent with the XRT position.
The position is 178.8 arc sec from the BAT position.
src: 1 distr. of nearby unmatched sources: 0 0 0 0 0
Found 4 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
192.9309 17.0752 3.6 -1 USNO-B1 19.89 19.38 19.61 *
192.9313 17.0751 5.0 -1 USNO-B1 20.20 19.47 19.79
192.9316 17.0748 6.1 -1 USNO-B1 20.46 19.48 19.91
192.9318 17.0737 9.0 -1 USNO-B1 18.24 19.65 19.02
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 2 in the list of sources is a candidate afterglow for 1061554_g118 with 5x5 stamp
ra=192.97766 (12:51:54.64) dec=17.15064 (+17:09:02.3) +/- 1.1" mag=20.21+/-0.35
dist=244.8 REFID=14
*** The position of this source is inconsistent with the XRT position.
The position is 182.2 arc sec from the BAT position.
src: 2 distr. of nearby unmatched sources: 0 0 0 0 0
Found 1 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
192.9812 17.1533 15.7 -1 USNO-B1 99.99 19.53 99.99
*** If XRT position is correct, then this is NOT the afterglow
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 18.12, XRT distances < 6.25",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
srclist paragraph message for exposure 1 of trigger 1061554
------ Start for Possible Stand-alone Circular ----
In response to GRB210725 (Swift/BAT trigger 1061554) at 12:00:48 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting 91
seconds after the BAT trigger. No credible afterglow candidate has been found
in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT
error circle. The typical 3-sigma upper limit has been about 19.2 mag. The
8'x8' region for the list of sources generated on-board covers 100% of the XRT
error circle. The list of sources is typically complete to about 18.0 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.023.
------- notes for trigger 1061554 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210725d15h36m04s942594usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1061554
-expid=648907367 -meonly -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/1061554/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
XRT position found for srclist. XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 648907367.06446 or about 2021:206:12:02:42 UT
Found 637 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 7% of the srclist region. Found 16 sources in
srclist catalog. Found 3 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.12 mag.
Found 3 source(s) in Genie image catalog. Found 0 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 20.38 mag. Found 65 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 8% of the
Genie image region.
Genie image analysis:
Found 19654.1 counts in the large background region of 6075.0 pixels or a rate
of 3.235 counts/pixel in a radius of 45.0 arcsec. Based on this background, the
typical 5-sigma UL at a random point in the Genie image is 19.67 mag. for a
4-arcsec aperture.
Found 548.5 counts in the XRT position region of 198.0 pixels or a rate of
2.770 counts/pixel in a radius of 8.0 arcsec. The net count rate (using large
background region) at the XRT position is -0.368 +/- 0.095 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.286 cps or 19.54 mag. The closest srclist
source has ra= 192.9245 dec= 17.1250 mag=19.00 sep=61.35". The closest Genie
source has ra= 192.9243 dec= 17.1132 mag=18.42 sep=19.80".
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?
648907367 91 U srclist found no candidates.
648907367 91 U image found no candidates.
List afterglow candidates for other finding charts.
648907622 346 B srclist found no candidates.
648907622 346 B image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 17.10808
GRB_ERROR: 6.25
GRB_RA: 192.92217
IMAGE_START_TIME: 12:02:42
MAGNITUDE: 19.5
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT