srclist overlap message for exposure 3 of trigger 1107050
uvot_overlap.pl vrs. 2010-12-20b fem started at 220518d10h14m33s938079usUT
The observation of trigger 1107050 started 2022-05-18T06:34:23.3
Examining file ./1107050_g902_uvot_sky_srclist.fits
The exposure ID is 674548463
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (55.3693,-47.5641) with a roll angle of 359.7
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 (55.3690,-47.5710) with a radius of 3.000 arc min
This is 0.417 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 (55.3433,-47.5838) with a radius of 0.037 arc min
This is 1.584 arc min from the center of the uvot region
The area of the XRT error circle is 0.004 sq. arc min
The UVOT/XRT overlap is 0.004 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 3 of trigger 1107050
find_uvot_ag.pl vrs. 2020-10-30 fem started at 220518d10h14m49s411281usUT
Observation start time is 2022-05-18T06:34:23.3
Examining file ./1107050_g902_uvot_catalog_srclist.fits
The exposure ID is 674548463
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 85 detected source(s) for 1107050_g902
Aspect correction adds -0.00028 degrees (-0.068 sec of time = -0.69 arc sec) to RA
Aspect correction adds 0.00136 degrees ( 4.89 arcsec) to Dec
Total aspect correction is 4.93 arcsec
Star catalogs centered at 55.3652 , -47.5565 with radius 7.83 arc min.
n_usno: 419 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.33516
RA DEC Mag Color
bright star 0: 55.29227 (03:41:10.14) -47.62874 (-47:37:43.5) 11.34 USNO-V
Mean distance difference (CAT_DELTA) for 56 matched entries is 0.900" for 1107050_g902
Mean and std. dev of mag. difference (MAG_DELTA) are 1.469 and 1.162 for 1107050_g902
Found 32 entries without IDs and 3 entries that are acceptable afterglow candidates for 1107050_g902.
Acceptable entries have no ID, XRT distances < 5.5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
20 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=55.3690 (03:41:28.56) DEC=-47.5710 (-47:34:15.6)
XRT distances are from RA=55.3433 (03:41:22.39) DEC=-47.5838 (-47:35:01.5)
*** WARNING 37 per cent of entries have no IDs.
-----------------
Entry 2 in the list of sources is a candidate afterglow for 1107050_g902 with 3x3 stamp
ra=55.39362 (03:41:34.47) dec=-47.57241 (-47:34:20.7) +/- 1.1" mag=20.14+/-0.35
dist=128.9 REFID=74
*** The position of this source is inconsistent with the XRT position.
The position is 60.0 arc sec from the BAT position.
src: 2 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
55.3926 -47.5698 9.8 -1 USNO-B1 20.94 19.03 19.88
55.3880 -47.5760 18.9 -1 USNO-B1 22.78 21.20 21.90
55.3978 -47.5748 13.4 -1 USNO-B1 21.56 99.99 99.99
55.3980 -47.5750 14.2 -1 USNO-B1 21.74 19.44 20.46
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 4 in the list of sources is a candidate afterglow for 1107050_g902 with 3x3 stamp
ra=55.36192 (03:41:26.86) dec=-47.60123 (-47:36:04.4) +/- 1.1" mag=20.62+/-0.35
dist=77.5 REFID=81
*** The position of this source is inconsistent with the XRT position.
The position is 110.2 arc sec from the BAT position.
src: 4 distr. of nearby unmatched sources: 0 0 0 0 0
Found 2 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
55.3582 -47.6036 12.4 -1 USNO-B1 22.91 20.77 21.72
55.3613 -47.6062 17.8 -1 USNO-B1 15.86 13.62 14.62
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 5 in the list of sources is a candidate afterglow for 1107050_g902 with 3x3 stamp
ra=55.40574 (03:41:37.38) dec=-47.55105 (-47:33:03.8) +/- 1.1" mag=20.82+/-0.35
dist=192.0 REFID=83
*** The position of this source is inconsistent with the XRT position.
The position is 114.6 arc sec from the BAT position.
src: 5 distr. of nearby unmatched sources: 0 0 0 0 0
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** If XRT position is correct, then this is NOT the afterglow
Found 1 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
55.3453 -47.5851 7.0 -1 USNO-B1 22.34 21.99 22.15
The closest star is 6.98" away.
List UVOT sources within 10" of the XRT position:
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.22, XRT distances < 5.5",
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 3 of trigger 1107050
IMAGE PROBLEM: no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB220518 (Swift/BAT trigger 1107050) at 06:19:20 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 873 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 none of
the XRT error circle. 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 mag. No correction has been made for the expected
extinction corresponding to E(B-V) of 0.008.
------- notes for trigger 1107050 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 220518d10h14m51s369589usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1107050
-expid=674548463 -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/1107050/
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 674548463.28654 or about 2022:138:06:34:18 UT
Found 415 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 4% of the srclist region. Found 85 sources in
srclist catalog. Found 32 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 mag.
Found 2 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 20.78 mag. Found 27 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 48452.7 counts in the large background region of 6158.0 pixels or a rate
of 7.868 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 20.06 mag. for a
4-arcsec aperture. The closest srclist source has ra= 55.3619 dec= -47.6012
mag=20.62 sep=77.49". The closest Genie source has ra= 55.3594 dec= -47.5647
mag=18.04 sep=79.13".
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?
674548463 872 WHITE srclist found no candidates.
674548463 872 WHITE image found no candidates.
List afterglow candidates for other finding charts.
674547719 128 WHITE srclist found no candidates.
674547719 128 WHITE image found no candidates.
674547931 340 U srclist found no candidates.
674547931 340 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: -47.58375
GRB_ERROR: 5.5
GRB_RA: 55.34329
IMAGE_START_TIME: 06:34:18
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT