srclist overlap message for exposure 2 of trigger 1040123
uvot_overlap.pl vrs. 2010-12-20b fem started at 210403d12h55m43s546079usUT
The observation of trigger 1040123 started 2021-04-02T22:09:05.3
Examining file ./1040123_g639094145_uvot_sky_srclist.fits
The exposure ID is 639094145
The exposure time is undefined.
The filter is U.
The uvot region is centered at (198.2564,44.5170) with a roll angle of 7.7
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 (198.2587,44.5129) with a radius of 3.000 arc min
This is 0.267 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 (198.2593,44.5145) with a radius of 0.033 arc min
This is 0.194 arc min from the center of the uvot region
The area of the XRT error circle is 0.003 sq. arc min
The UVOT/XRT overlap is 0.003 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 2 of trigger 1040123
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210403d12h56m19s351349usUT
Observation start time is 2021-04-02T22:09:05.3
Examining file ./1040123_g639094145_uvot_catalog_srclist.fits
The exposure ID is 639094145
The exposure is 250.023 sec.
The bin size is 2 pixels
The filter is U
There are 23 detected source(s) for 1040123_g639094145
Aspect correction adds -0.00021 degrees (-0.051 sec of time = -0.54 arc sec) to RA
Aspect correction adds 0.00093 degrees ( 3.35 arcsec) to Dec
Total aspect correction is 3.40 arcsec
Star catalogs centered at 198.2720 , 44.5128 with radius 6.00 arc min.
n_usno: 204 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 10.34182
RA DEC Mag Color
bright star 0: 198.14660 (13:12:35.18) 44.47780 (+44:28:40.1) 10.34 USNO-V
Mean distance difference (CAT_DELTA) for 9 matched entries is 0.572" for 1040123_g639094145
Mean and std. dev of mag. difference (MAG_DELTA) are 1.338 and 0.607 for 1040123_g639094145
Found 14 entries without IDs and 4 entries that are acceptable afterglow candidates for 1040123_g639094145.
Acceptable entries have no ID, XRT distances < 5", 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=198.2587 (13:13:02.09) DEC=44.5129 (+44:30:46.4)
XRT distances are from RA=198.2593 (13:13:02.22) DEC=44.5145 (+44:30:52.3)
*** WARNING 60 per cent of entries have no IDs.
-----------------
Entry 3 in the list of sources is a candidate afterglow for 1040123_g639094145 with 5x5 stamp
ra=198.25326 (13:13:00.78) dec=44.54513 (+44:32:42.5) +/- 1.1" mag=17.61+/-0.35
dist=111.2 REFID=7
*** The position of this source is inconsistent with the XRT position.
The position is 116.9 arc sec from the BAT position.
src: 3 distr. of nearby unmatched sources: 1 2 2 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
198.2592 44.5437 16.1 -1 USNO-B1 20.04 19.52 19.75
198.2520 44.5435 6.8 -1 USNO-B1 99.99 19.26 99.99
198.2526 44.5456 2.4 -1 USNO-B1 12.79 13.09 12.96 *
198.2491 44.5457 10.8 -1 USNO-B1 19.72 19.02 19.33
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 4 in the list of sources is a candidate afterglow for 1040123_g639094145 with 5x5 stamp
ra=198.25351 (13:13:00.84) dec=44.54539 (+44:32:43.4) +/- 1.1" mag=16.61+/-0.35
dist=112.1 REFID=6
*** The position of this source is inconsistent with the XRT position.
The position is 117.7 arc sec from the BAT position.
src: 4 distr. of nearby unmatched sources: 2 1 2 0 0
Found 4 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
198.2592 44.5437 15.9 -1 USNO-B1 20.04 19.52 19.75
198.2520 44.5435 7.9 -1 USNO-B1 99.99 19.26 99.99
198.2526 44.5456 2.4 -1 USNO-B1 12.79 13.09 12.96 *
198.2491 44.5457 11.3 -1 USNO-B1 19.72 19.02 19.33
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 6 in the list of sources is a candidate afterglow for 1040123_g639094145 with 5x5 stamp
ra=198.25354 (13:13:00.85) dec=44.54677 (+44:32:48.4) +/- 1.1" mag=18.67+/-0.35
dist=117.0 REFID=11
*** The position of this source is inconsistent with the XRT position.
The position is 122.7 arc sec from the BAT position.
src: 6 distr. of nearby unmatched sources: 1 2 2 0 0
Found 4 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
198.2592 44.5437 18.3 -1 USNO-B1 20.04 19.52 19.75
198.2520 44.5435 12.5 -1 USNO-B1 99.99 19.26 99.99
198.2526 44.5456 4.8 -1 USNO-B1 12.79 13.09 12.96 *
198.2491 44.5457 12.0 -1 USNO-B1 19.72 19.02 19.33
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 7 in the list of sources is a candidate afterglow for 1040123_g639094145 with 5x5 stamp
ra=198.25658 (13:13:01.58) dec=44.54717 (+44:32:49.8) +/- 1.1" mag=19.68+/-0.35
dist=117.7 REFID=21
*** The position of this source is inconsistent with the XRT position.
The position is 123.5 arc sec from the BAT position.
src: 7 distr. of nearby unmatched sources: 0 1 2 2 0
Found 4 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
198.2592 44.5437 14.2 -1 USNO-B1 20.04 19.52 19.75
198.2520 44.5435 17.7 -1 USNO-B1 99.99 19.26 99.99
198.2526 44.5456 11.5 -1 USNO-B1 12.79 13.09 12.96 *
198.2491 44.5457 19.9 -1 USNO-B1 19.72 19.02 19.33
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
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 18.12, XRT distances < 5",
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 2 of trigger 1040123
------ Start for Possible Stand-alone Circular ----
In response to GRB210402 (Swift/BAT trigger 1040123) at 22:04:17 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
261 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
0.018.
------- notes for trigger 1040123 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210403d12h56m21s234308usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1040123
-expid=639094145 -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/1040123/
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 639094145.2902 or about 2021:092:22:09:00 UT
Found 200 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 3% of the srclist region. Found 23 sources in
srclist catalog. Found 14 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 7 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 20.76 mag. Found 42 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 4% of the
Genie image region.
Genie image analysis:
Found 9864.8 counts in the large background region of 6104.0 pixels or a rate
of 1.616 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 20.05 mag. for a
4-arcsec aperture.
Found 327.8 counts in the XRT position region of 200.0 pixels or a rate of
1.639 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.010 +/- 0.078 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.235 cps or 19.76 mag. The closest srclist
source has ra= 198.2650 dec= 44.5098 mag=19.46 sep=22.42". The closest Genie
source has ra= 198.2649 dec= 44.5097 mag=18.08 sep=22.63".
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?
639094145 261 U srclist found no candidates.
639094145 261 U image found no candidates.
List afterglow candidates for other finding charts.
639093986 102 WHITE srclist found no candidates.
639093986 102 WHITE image found no candidates.
639094702 818 WHITE srclist found no candidates.
639094702 818 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 44.51453
GRB_ERROR: 5
GRB_RA: 198.25925
IMAGE_START_TIME: 22:09:00
MAGNITUDE: 19.8
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT