srclist overlap message for exposure 1 of trigger 894268
uvot_overlap.pl vrs. 2010-12-20b fem started at 190322d11h24m12s211101usUT
The observation of trigger 894268 started 2019-03-22T11:11:21.4
Examining file ./894268_g895_uvot_sky_srclist.fits
The exposure ID is 574945881
The exposure time is undefined.
The filter is U.
The uvot region is centered at (314.6637,41.7812) with a roll angle of 121.6
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 (314.6560,41.7850) with a radius of 3.000 arc min
This is 0.411 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 (314.6988,41.7743) with a radius of 0.077 arc min
This is 1.624 arc min from the center of the uvot region
The area of the XRT error circle is 0.018 sq. arc min
The UVOT/XRT overlap is 0.018 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 1 of trigger 894268
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190322d11h24m14s514086usUT
Observation start time is 2019-03-22T11:11:21.4
Examining file ./894268_g895_uvot_catalog_srclist.fits
The exposure ID is 574945881
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is U
There are 67 detected source(s) for 894268_g895
Aspect correction adds 0.00030 degrees (0.071 sec of time = 0.79 arc sec) to RA
Aspect correction adds -0.00088 degrees (-3.16 arcsec) to Dec
Total aspect correction is 3.26 arcsec
Star catalogs centered at 314.6747 , 41.7842 with radius 7.67 arc min.
n_usno: 2369 n_gsc: 0
*** WARNING -- bright star catalog has 6 entries brighter than 12 mag
The brightest has mag 11.04846
RA DEC Mag Color
bright star 0: 314.67347 (20:58:41.63) 41.70402 (+41:42:14.5) 11.39 USNO-V
bright star 1: 314.66003 (20:58:38.41) 41.70178 (+41:42:06.4) 11.87 USNO-V
bright star 2: 314.67041 (20:58:40.90) 41.87828 (+41:52:41.8) 11.64 USNO-V
bright star 3: 314.63882 (20:58:33.32) 41.88620 (+41:53:10.3) 11.21 USNO-V
bright star 4: 314.74957 (20:58:59.90) 41.87756 (+41:52:39.2) 11.05 USNO-V
bright star 5: 314.74822 (20:58:59.57) 41.89269 (+41:53:33.7) 11.42 USNO-V
Mean distance difference (CAT_DELTA) for 62 matched entries is 0.701" for 894268_g895
Mean and std. dev of mag. difference (MAG_DELTA) are 2.674 and 0.903 for 894268_g895
Found 7 entries without IDs and 2 entries that are acceptable afterglow candidates for 894268_g895.
Acceptable entries have no ID, XRT distances < 11.5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
1 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=314.6560 (20:58:37.44) DEC=41.7850 (+41:47:06.0)
XRT distances are from RA=314.6988 (20:58:47.70) DEC=41.7743 (+41:46:27.6)
-----------------
Entry 4 in the list of sources is a candidate afterglow for 894268_g895 with 3x3 stamp
ra=314.69791 (20:58:47.50) dec=41.74799 (+41:44:52.8) +/- 1.1" mag=19.43+/-0.35
dist=94.8 REFID=67
*** The position of this source is inconsistent with the XRT position.
The position is 174.4 arc sec from the BAT position.
src: 4 distr. of nearby unmatched sources: 0 0 0 0 1
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
314.6959 41.7520 15.5 -1 USNO-B1 20.79 19.19 19.90
314.7028 41.7462 14.8 -1 USNO-B1 20.49 18.69 19.49
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 28 in the list of sources is a candidate afterglow for 894268_g895 with 3x3 stamp
ra=314.63137 (20:58:31.53) dec=41.81881 (+41:49:07.7) +/- 1.1" mag=19.17+/-0.35
dist=241.5 REFID=64
*** The position of this source is inconsistent with the XRT position.
The position is 138.5 arc sec from the BAT position.
src: 28 distr. of nearby unmatched sources: 0 0 0 0 0
Found 8 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
314.6323 41.8137 18.5 -1 USNO-B1 18.45 15.51 16.81
314.6345 41.8161 12.7 -1 USNO-B1 20.33 18.29 19.19
314.6320 41.8183 2.5 -1 USNO-B1 17.04 14.54 15.65 *
314.6307 41.8202 5.3 -1 USNO-B1 20.25 18.74 19.41
314.6272 41.8203 12.5 -1 USNO-B1 20.25 18.61 19.34
314.6254 41.8202 16.7 -1 USNO-B1 20.17 19.57 19.84
314.6307 41.8239 18.5 -1 USNO-B1 19.24 16.61 17.78
314.6288 41.8236 18.7 -1 USNO-B1 20.44 18.08 19.13
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
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
314.6981 41.7770 9.9 -1 USNO-B1 16.73 13.82 15.12
The closest star is 9.88" away.
List UVOT sources within 10" of the XRT position:
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 17.84, XRT distances < 11.5",
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 1 of trigger 894268
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB190322 (Swift/BAT trigger 894268) at 10:56:25 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the U 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 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 large, but uncertain, extinction expected.
------- notes for trigger 894268 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190322d11h24m26s320426usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=894268
-expid=574945881 -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/894268/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for xrt position. XRT position found for srclist.
XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 574945881.44722 or about 2019:081:11:11:16 UT
Found 2365 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 27% of the srclist region. Found 67 sources in
srclist catalog. Found 7 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
17.84 mag.
Found 5 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 19.58 mag. Found 207 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 31% of the
Genie image region.
Genie image analysis:
Found 31294.2 counts in the large background region of 6138.0 pixels or a rate
of 5.098 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 19.07 mag. for a
4-arcsec aperture.
Found 1144.3 counts in the XRT position region of 198.0 pixels or a rate of
5.779 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.879 +/- 0.241 (1-sigma) cps or
18.52 mag and a range from 18.26 to 18.87 mag. The 3-sigma UL at the XRT
position is 1.602 cps or 17.87 mag. The closest srclist source has ra= 314.6982
dec= 41.7771 mag=16.61 sep=10.19". The closest Genie source has ra= 314.6980
dec= 41.7771 mag=15.69 sep=10.04".
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?
574945881 873 U srclist found no candidates.
574945881 873 U image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 41.77433
GRB_ERROR: 11.5
GRB_RA: 314.69875
IMAGE_START_TIME: 11:11:16
MAGNITUDE: 17.9
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT