srclist overlap message for exposure 1 of trigger 1325580
uvot_overlap.pl vrs. 2010-12-20b fem started at 250618d04h54m31s502068usUT
The observation of trigger 1325580 started 2025-06-17T21:15:42.6
Examining file ./1325580_g831_uvot_sky_srclist.fits
The exposure ID is 771887742
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (332.9099,32.7309) with a roll angle of 57.6
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 (332.9020,32.7270) with a radius of 3.000 arc min
This is 0.462 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 (332.8967,32.7325) with a radius of 0.038 arc min
This is 0.675 arc min from the center of the uvot region
The area of the XRT error circle is 0.005 sq. arc min
The UVOT/XRT overlap is 0.005 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 1 of trigger 1325580
find_uvot_ag.pl vrs. 2023-04-25a fem started at 250618d04h54m34s099514usUT
Observation start time is 2025-06-17T21:15:42.6
Examining file ./1325580_g831_uvot_catalog_srclist.fits
The exposure ID is 771887742
The exposure is 149.802 sec.
The bin size is 2 pixels
The filter is WHITE
There are 180 detected source(s) for 1325580_g831
Aspect correction adds 0.00089 degrees (0.215 sec of time = 2.71 arc sec) to RA
Aspect correction adds 0.00046 degrees ( 1.67 arcsec) to Dec
Total aspect correction is 3.18 arcsec
Star catalogs centered at 332.9108 , 32.7320 with radius 6.47 arc min.
n_usno: 854 n_gsc: 824
*** WARNING -- bright star catalog has 3 entries brighter than 12 mag
The brightest has mag 10.4176
RA DEC Mag Color
bright star 0: 332.92465 (22:11:41.92) 32.77248 (+32:46:20.9) 11.48 USNO-V
bright star 1: 332.94877 (22:11:47.71) 32.69913 (+32:41:56.9) 11.16 USNO-V
bright star 2: 332.83570 (22:11:20.57) 32.70945 (+32:42:34.0) 10.42 USNO-V
Mean distance difference (CAT_DELTA) for 125 matched entries is 0.785" for 1325580_g831
Mean and std. dev of mag. difference (MAG_DELTA) are 1.581 and 0.683 for 1325580_g831
Found 57 entries without IDs and 4 entries that are acceptable afterglow candidates for 1325580_g831.
Acceptable entries have no ID, XRT distances < 5.75", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
49 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=332.9020 (22:11:36.48) DEC=32.7270 (+32:43:37.2)
XRT distances are from RA=332.8967 (22:11:35.21) DEC=32.7325 (+32:43:57.0)
*** WARNING 31 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1325580_g831 with 3x3 stamp
ra=332.89698 (22:11:35.27) dec=32.73259 (+32:43:57.3) +/- 1.1" mag=18.69+/-0.35
dist=0.9 REFID=59
src: 0 distr. of nearby unmatched sources: 0 0 0 0 0
Found 6 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
332.8982 32.7286 14.8 -1 USNO-B1 18.68 17.97 18.28
332.8941 32.7376 20.0 -1 USNO-B1 20.07 18.62 19.27
332.8924 32.7310 14.8 -1 USNO-B1 20.49 19.79 20.10
332.8983 32.7285 15.2 -1 GSC2.3 18.09 19.10 18.31
332.8942 32.7376 19.8 -1 GSC2.3 18.23 20.83 99.99
332.8919 32.7319 15.6 -1 GSC2.3 19.72 21.82 99.99
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
-----------------
Entry 21 in the list of sources is a candidate afterglow for 1325580_g831 with 3x3 stamp
ra=332.93487 (22:11:44.37) dec=32.72935 (+32:43:45.7) +/- 1.1" mag=17.89+/-0.35
dist=116.1 REFID=38
*** The position of this source is inconsistent with the XRT position.
The position is 99.9 arc sec from the BAT position.
src: 21 srclist_match has ID
src: 21 distr. of nearby unmatched sources: 0 0 0 0 0
Found 6 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
332.9288 32.7284 18.8 -1 USNO-B1 19.30 18.68 18.96
332.9347 32.7308 5.1 -1 USNO-B1 14.47 13.55 13.96
332.9288 32.7283 18.7 -1 GSC2.3 18.32 19.67 18.95
332.9347 32.7311 6.2 -1 GSC2.3 14.41 15.46 13.77
332.9348 32.7291 0.9 -1 GSC2.3 15.93 16.71 99.99 *
332.9382 32.7319 13.7 -1 GSC2.3 20.42 21.97 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 56 in the list of sources is a candidate afterglow for 1325580_g831 with 3x3 stamp
ra=332.95743 (22:11:49.78) dec=32.72096 (+32:43:15.4) +/- 1.1" mag=19.32+/-0.35
dist=188.6 REFID=98
*** The position of this source is inconsistent with the XRT position.
The position is 169.3 arc sec from the BAT position.
src: 56 distr. of nearby unmatched sources: 0 0 0 0 0
Found 9 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
332.9540 32.7238 14.5 -1 USNO-B1 20.63 20.18 20.38
332.9587 32.7215 4.3 -1 USNO-B1 15.11 14.16 14.58
332.9572 32.7163 16.8 -1 USNO-B1 20.81 19.37 20.01
332.9625 32.7241 19.1 -1 USNO-B1 18.27 17.60 17.90
332.9539 32.7236 14.4 -1 GSC2.3 20.10 22.44 99.99
332.9588 32.7214 4.4 -1 GSC2.3 14.18 15.17 14.34
332.9572 32.7162 17.3 -1 GSC2.3 19.18 22.08 99.99
332.9625 32.7241 19.0 -1 GSC2.3 17.73 18.74 17.63
332.9618 32.7192 14.7 -1 GSC2.3 20.02 99.99 99.99
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 79 in the list of sources is a candidate afterglow for 1325580_g831 with 1x1 stamp
ra=332.91874 (22:11:40.50) dec=32.77595 (+32:46:33.4) +/- 1.1" mag=19.60+/-0.35
dist=170.1 REFID=179
*** The position of this source is inconsistent with the XRT position.
The position is 183.4 arc sec from the BAT position.
src: 79 distr. of nearby unmatched sources: 0 0 0 4 2
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
332.9146 32.7774 13.6 -1 USNO-B1 20.67 19.58 20.06
332.9188 32.7795 12.8 -1 USNO-B1 19.76 20.04 19.91
332.9225 32.7738 13.7 -1 GSC2.3 99.99 99.99 99.99
332.9203 32.7764 4.9 -1 GSC2.3 19.31 21.54 99.99
332.9128 32.7774 18.7 -1 GSC2.3 99.99 21.22 99.99
332.9147 32.7774 13.3 -1 GSC2.3 18.37 21.25 99.99
332.9230 32.7776 14.1 -1 GSC2.3 20.13 99.99 99.99
332.9189 32.7794 12.3 -1 GSC2.3 19.34 20.18 99.99
*** If XRT position is correct, then this is NOT the afterglow
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=332.89698 (22:11:35.27) dec=32.73259 (+32:43:57.3) +/- 1.1" mag=18.69+/-0.35 dist=0.9 REFID=59
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.22, XRT distances < 5.75",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
srclist paragraph message for exposure 1 of trigger 1325580
------ Start for Possible Stand-alone Circular ----
In response to GRB250617 (Swift/BAT trigger 1325580) at 21:01:50 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 796 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 22:11:35.25 = 332.89686
DEC(J2000) = +32:43:56.9 = 32.73247
with a 90%-confidence error radius of about 0.62 arc sec. This position is 0.5
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.17 with a 1-sigma error of about 0.15. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.087.
------- notes for trigger 1325580 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 250618d04h54m37s619120usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1325580
-expid=771887742 -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/1325580/
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 771887742.63924 or about 2025:169:21:15:37 UT
Found 850 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 14% of the srclist region. Found 180 sources in
srclist catalog. Found 57 srclist source(s) without IDs. There are 1 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 mag.
Found 26 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 8 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.84 mag. Found 133 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 15% of the Genie image region.
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?
771887742 796 WHITE 332.89698 32.73259 18.69/19.2 0.9 srclist Yes
771887742 796 WHITE 332.89686 32.73247 18.17/20.8 0.5 image Yes
List afterglow candidates for other finding charts.
771887896 950 WHITE 332.89706 32.73264 18.74/19.2 1.3 srclist Yes
771887896 950 WHITE 332.89678 32.73251 18.45/20.8 0.6 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 32.73247
GRB_ERROR: 0.62
GRB_RA: 332.89686
IMAGE_START_TIME: 21:15:37
MAGNITUDE: 18.17
MAG_ERROR: 0.15
MESSAGE_TYPE: ACK
SOURCE: XRT