srclist overlap message for exposure 2 of trigger 959431
uvot_overlap.pl vrs. 2010-12-20b fem started at 200303d07h28m51s169868usUT
The observation of trigger 959431 started 2020-03-03T02:40:30.5
Examining file ./959431_g332_uvot_sky_srclist.fits
The exposure ID is 604896030
The exposure time is undefined.
The filter is U.
The uvot region is centered at (212.7217,51.3623) with a roll angle of 59.2
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 (212.6980,51.3600) with a radius of 3.000 arc min
This is 0.898 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 (212.7190,51.3593) with a radius of 0.028 arc min
This is 0.205 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 959431
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200303d07h29m02s799715usUT
Observation start time is 2020-03-03T02:40:30.5
Examining file ./959431_g332_uvot_catalog_srclist.fits
The exposure ID is 604896030
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 9 detected source(s) for 959431_g332
Aspect correction adds 0.00082 degrees (0.196 sec of time = 1.83 arc sec) to RA
Aspect correction adds 0.00063 degrees ( 2.26 arcsec) to Dec
Total aspect correction is 2.91 arcsec
Star catalogs centered at 212.7323 , 51.3629 with radius 5.12 arc min.
n_usno: 138 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 6 matched entries is 0.537" for 959431_g332
Mean and std. dev of mag. difference (MAG_DELTA) are 1.529 and 0.391 for 959431_g332
Found 3 entries without IDs and 3 entries that are acceptable afterglow candidates for 959431_g332.
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.
Magnitude criteria will be applied later.
BAT distances are from RA=212.6980 (14:10:47.52) DEC=51.3600 (+51:21:36.0)
XRT distances are from RA=212.7190 (14:10:52.55) DEC=51.3593 (+51:21:33.5)
*** WARNING 33 per cent of entries have no IDs.
-----------------
Entry 1 in the list of sources is a candidate afterglow for 959431_g332 with 5x5 stamp
ra=212.65778 (14:10:37.87) dec=51.35032 (+51:21:01.2) +/- 1.1" mag=20.56+/-0.35
dist=141.3 REFID=9
*** The position of this source is inconsistent with the XRT position.
The position is 96.9 arc sec from the BAT position.
src: 1 distr. of nearby unmatched sources: 0 0 0 0 0
Found 2 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
212.6628 51.3531 15.2 -1 USNO-B1 21.88 20.13 20.91
212.6550 51.3540 14.6 -1 USNO-B1 99.99 19.83 99.99
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 3 in the list of sources is a candidate afterglow for 959431_g332 with 5x5 stamp
ra=212.78396 (14:11:08.15) dec=51.37015 (+51:22:12.5) +/- 1.1" mag=20.63+/-0.35
dist=151.2 REFID=8
*** The position of this source is inconsistent with the XRT position.
The position is 196.6 arc sec from the BAT position.
src: 3 distr. of nearby unmatched sources: 0 0 1 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
212.7844 51.3651 18.0 -1 USNO-B1 20.64 19.51 20.01
212.7882 51.3711 10.2 -1 USNO-B1 19.66 19.19 19.40
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 5 in the list of sources is a candidate afterglow for 959431_g332 with 5x5 stamp
ra=212.65480 (14:10:37.15) dec=51.39631 (+51:23:46.7) +/- 1.1" mag=18.95+/-0.35
dist=196.2 REFID=5
*** The position of this source is inconsistent with the XRT position.
The position is 162.8 arc sec from the BAT position.
src: 5 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
212.6548 51.3975 4.2 -1 USNO-B1 13.98 12.77 13.31 *
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:
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 959431
------ Start for Possible Stand-alone Circular ----
In response to GRB200303 (Swift/BAT trigger 959431) at 02:34:57 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
308 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
0.02.
------- notes for trigger 959431 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200303d07h29m05s308441usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=959431
-expid=604896030 -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/959431/
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 604896030.47486 or about 2020:063:02:40:25 UT
Found 134 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 3% of the srclist region. Found 9 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 4 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 20.80 mag. Found 36 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 9429.7 counts in the large background region of 6306.0 pixels or a rate
of 1.495 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 20.29 mag. for a
4-arcsec aperture.
Found 292.4 counts in the XRT position region of 198.0 pixels or a rate of
1.477 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.028 +/- 0.074 (1-sigma) cps or
22.27 mag and a range from 20.87 to 99.99 mag. The 3-sigma UL at the XRT
position is 0.248 cps or 19.89 mag. The closest srclist source has ra= 212.6874
dec= 51.3775 mag=18.12 sep=96.67". The closest Genie source has ra= 212.7440
dec= 51.3588 mag=20.05 sep=56.23".
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?
604896030 308 U srclist found no candidates.
604896030 308 U image found no candidates.
List afterglow candidates for other finding charts.
604895818 96 WHITE srclist found no candidates.
604895818 96 WHITE image found no candidates.
604896585 863 WHITE srclist found no candidates.
604896585 863 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 51.35931
GRB_ERROR: 5
GRB_RA: 212.71896
IMAGE_START_TIME: 02:40:25
MAGNITUDE: 19.9
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT