srclist overlap message for exposure 3 of trigger 1253910
uvot_overlap.pl vrs. 2010-12-20b fem started at 260409d18h16m40s873697usUT
The observation of trigger 1253910 started 2024-09-12T02:01:54.3
Examining file 1253910_g914_uvot_sky_srclist.fits
The exposure ID is 747799314
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (124.6413,33.9968) with a roll angle of 114.6
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 (124.6246,33.9989) with a radius of 1.000 arc min
This is 0.841 arc min from the center of the uvot region
The area of the BAT error circle is 3.14 sq. arc min
The UVOT/BAT overlap is 3.14 sq. arc min or 1.00 of the BAT error circle
The XRT error circle is centered at (124.6347,33.9990) with a radius of 0.042 arc min
This is 0.355 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 3 of trigger 1253910
find_uvot_ag.pl vrs. 2023-04-25a fem started at 260409d18h16m41s837411usUT
Observation start time is 2024-09-12T02:01:54.3
Examining file 1253910_g914_uvot_catalog_srclist.fits
The exposure ID is 747799314
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 85 detected source(s) for 1253910_g914
Aspect correction adds -0.00001 degrees (-0.003 sec of time = -0.03 arc sec) to RA
Aspect correction adds -0.00032 degrees (-1.15 arcsec) to Dec
Total aspect correction is 1.15 arcsec
Star catalogs centered at 124.6333 , 33.9946 with radius 8.27 arc min.
n_usno: 578 n_gsc: 471
*** WARNING -- bright star catalog has 7 entries brighter than 12 mag
The brightest has mag 10.6989
RA DEC Mag Color
bright star 0: 124.64064 (08:18:33.75) 34.02907 (+34:01:44.7) 10.83 USNO-V
bright star 1: 124.50209 (08:18:00.50) 33.99946 (+33:59:58.0) 11.91 USNO-V
bright star 2: 124.75274 (08:19:00.66) 33.94577 (+33:56:44.8) 10.70 USNO-V
bright star 3: 124.49507 (08:17:58.82) 33.99485 (+33:59:41.5) 11.41 USNO-V
bright star 4: 124.74971 (08:18:59.93) 34.06898 (+34:04:08.3) 11.49 USNO-V
bright star 5: 124.55121 (08:18:12.29) 34.09670 (+34:05:48.1) 11.48 USNO-V
bright star 6: 124.57117 (08:18:17.08) 33.87867 (+33:52:43.2) 11.25 USNO-V
Mean distance difference (CAT_DELTA) for 51 matched entries is 0.573" for 1253910_g914
Mean and std. dev of mag. difference (MAG_DELTA) are 1.259 and 0.695 for 1253910_g914
Found 34 entries without IDs and 3 entries that are acceptable afterglow candidates for 1253910_g914.
Acceptable entries have no ID, XRT distances < 6.25", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
26 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=124.6246 (08:18:29.90) DEC=33.9989 (+33:59:56.2)
XRT distances are from RA=124.6347 (08:18:32.32) DEC=33.9990 (+33:59:56.4)
*** WARNING 40 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1253910_g914 with 3x3 stamp
ra=124.63505 (08:18:32.41) dec=33.99893 (+33:59:56.2) +/- 1.1" mag=18.26+/-0.35
dist=1.2 REFID=33
src: 0 distr. of nearby unmatched sources: 0 0 0 0 0
Found 0 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)
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
-----------------
Entry 26 in the list of sources is a candidate afterglow for 1253910_g914 with 3x3 stamp
ra=124.69279 (08:18:46.27) dec=33.99055 (+33:59:26.0) +/- 1.1" mag=19.44+/-0.35
dist=176.1 REFID=80
*** The position of this source is inconsistent with the XRT position.
The position is 179.2 arc sec from the BAT position.
src: 26 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
-----------------
Entry 28 in the list of sources is a candidate afterglow for 1253910_g914 with 3x3 stamp
ra=124.56670 (08:18:16.01) dec=34.00017 (+34:00:00.6) +/- 1.1" mag=19.44+/-0.35
dist=202.9 REFID=79
*** The position of this source is inconsistent with the XRT position.
The position is 198.8 arc sec from the BAT position.
src: 28 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
124.5721 33.9980 17.9 -1 USNO-B1 17.98 17.82 17.89
124.5722 33.9980 18.1 -1 GSC2.3 17.81 18.72 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=124.63505 (08:18:32.41) dec=33.99893 (+33:59:56.2) +/- 1.1" mag=18.26+/-0.35 dist=1.2 REFID=33
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.22, XRT distances < 6.25",
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 3 of trigger 1253910
------ Start for Possible Stand-alone Circular ----
In response to GRB240912 (Swift/BAT trigger 1253910) at 01:46:39 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 880 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 08:18:32.39 = 124.63494
DEC(J2000) = +33:59:56.3 = 33.99896
with a 90%-confidence error radius of about 0.75 arc sec. This position is 0.8
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.83 with a 1-sigma error of about 0.15. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.054.
------- notes for trigger 1253910 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 260409d18h16m46s934931usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1253910
-expid=747799314 -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/1253910/
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 747799314.27602 or about 2024:256:02:01:49 UT
Found 574 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 85 sources in
srclist catalog. Found 34 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 3 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 3 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.08 mag. Found 46 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 5% of the Genie image region. The
Genie image is INCOMPLETE with 724 null pixels.
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?
747799314 880 WHITE 124.63505 33.99893 18.26/19.2 1.2 srclist Yes
747799314 880 WHITE 124.63494 33.99896 17.83/20.1 0.8 image Yes
List afterglow candidates for other finding charts.
747798548 114 WHITE 124.63496 33.99892 17.75/19.2 0.9 srclist Yes
747798548 114 WHITE 124.63502 33.99896 17.40/20.2 1.1 image Yes
747798760 326 U 124.63498 33.99897 17.07/18.1 0.9 srclist Yes
747798760 326 U 124.63487 33.99903 16.75/19.9 0.6 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 33.99896
GRB_ERROR: 0.75
GRB_RA: 124.63494
IMAGE_START_TIME: 02:01:49
MAGNITUDE: 17.83
MAG_ERROR: 0.15
MESSAGE_TYPE: ACK
SOURCE: XRT