srclist overlap message for exposure 3 of trigger 821103
uvot_overlap.pl vrs. 2010-12-20b fem started at 180402d11h02m01s930011usUT
The observation of trigger 821103 started 2018-04-02T10:57:28.2
Examining file ./821103_g4348_uvot_sky_srclist.fits
The exposure ID is 544359448
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (251.9101,-14.9629) with a roll angle of 92.9
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 (251.9050,-14.9630) with a radius of 3.000 arc min
This is 0.295 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 (251.9336,-14.9686) with a radius of 0.035 arc min
This is 1.403 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 821103
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180402d11h02m23s813280usUT
Observation start time is 2018-04-02T10:57:28.2
Examining file ./821103_g4348_uvot_catalog_srclist.fits
The exposure ID is 544359448
The exposure is 149.870 sec.
The bin size is 2 pixels
The filter is WHITE
There are 86 detected source(s) for 821103_g4348
Aspect correction adds 0.00083 degrees (0.200 sec of time = 2.90 arc sec) to RA
Aspect correction adds 0.00044 degrees ( 1.57 arcsec) to Dec
Total aspect correction is 3.30 arcsec
Star catalogs centered at 251.9099 , -14.9600 with radius 6.06 arc min.
n_usno: 792 n_gsc: 964
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.23956
RA DEC Mag Color
bright star 0: 251.86794 (16:47:28.31) -14.90033 (-14:54:01.2) 11.24 USNO-V
Mean distance difference (CAT_DELTA) for 85 matched entries is 0.690" for 821103_g4348
Mean and std. dev of mag. difference (MAG_DELTA) are 1.072 and 0.316 for 821103_g4348
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 821103_g4348.
Acceptable entries have no ID, XRT distances < 5.25", 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=251.9050 (16:47:37.20) DEC=-14.9630 (-14:57:46.8)
XRT distances are from RA=251.9336 (16:47:44.06) DEC=-14.9686 (-14:58:06.9)
-----------------
Entry 5 in the list of sources is a candidate afterglow for 821103_g4348 with 3x3 stamp
ra=251.89724 (16:47:35.34) dec=-14.97936 (-14:58:45.7) +/- 1.1" mag=19.75+/-0.35
dist=132.2 REFID=84
*** The position of this source is inconsistent with the XRT position.
The position is 61.5 arc sec from the BAT position.
src: 5 distr. of nearby unmatched sources: 0 0 0 0 0
Found 7 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
251.8999 -14.9771 12.3 -1 USNO-B1 20.49 18.82 19.56
251.8978 -14.9790 2.4 -1 USNO-B1 18.87 17.10 17.88 *
251.8952 -14.9821 12.1 -1 USNO-B1 20.81 19.29 19.96
251.8998 -14.9772 11.9 -1 GSC2.3 18.99 20.61 99.99
251.8978 -14.9790 2.2 -1 GSC2.3 17.09 18.58 99.99 *
251.8923 -14.9770 19.3 -1 GSC2.3 20.35 99.99 99.99
251.8951 -14.9822 12.6 -1 GSC2.3 19.55 20.82 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 17 in the list of sources is a candidate afterglow for 821103_g4348 with 3x3 stamp
ra=251.93209 (16:47:43.70) dec=-14.95670 (-14:57:24.1) +/- 1.1" mag=20.18+/-0.35
dist=43.1 REFID=86
*** The position of this source is inconsistent with the XRT position.
The position is 97.8 arc sec from the BAT position.
src: 17 distr. of nearby unmatched sources: 0 0 0 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
251.9310 -14.9551 6.9 -1 USNO-B1 16.67 15.00 15.74
251.9310 -14.9551 6.8 -1 GSC2.3 14.87 16.47 99.99
251.9322 -14.9524 15.7 -1 GSC2.3 99.99 21.08 99.99
251.9348 -14.9534 15.2 -1 GSC2.3 20.35 21.08 99.99
*** If XRT position is correct, then this is NOT the afterglow
Found 2 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
251.9319 -14.9691 6.3 -1 USNO-B1 19.84 18.04 18.83
251.9319 -14.9692 6.3 -1 GSC2.3 18.23 19.78 99.99
The closest star is 6.26" 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 < 5.25",
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 3 of trigger 821103
------ Start for Possible Stand-alone Circular ----
In response to GRB180402 (Swift/BAT trigger 821103) at 09:44:59 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 4328 seconds after the BAT trigger. No credible afterglow candidate
has been found in the initial data products. Data from the 2.7'x2.7' sub-image
are not available at this time. 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 0.77.
------- notes for trigger 821103 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180402d11h02m26s103256usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=821103
-expid=544359448 -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/821103/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
XRT position found for srclist. BAT position found.
UVOT exposure began at MET 544359448.19438 or about 2018:092:10:57:23 UT
Found 957 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 18% of the srclist region. Found 86 sources in
srclist catalog. Found 2 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 mag.
The closest srclist source has ra= 251.9381 dec= -14.9707 mag=18.47 sep=17.46".
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?
544359448 4328 WHITE srclist found no candidates.
544359448 4328 ? image data are not available.
List afterglow candidates for other finding charts.
544355259 139 U srclist found no candidates.
544355259 139 U image found no candidates.
544355993 873 U srclist found no candidates.
544355993 873 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: -14.96858
GRB_ERROR: 5.25
GRB_RA: 251.93358
IMAGE_START_TIME: 10:57:23
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT