srclist overlap message for exposure 3 of trigger 1250617
uvot_overlap.pl vrs. 2010-12-20b fem started at 240825d23h26m15s150239usUT
The observation of trigger 1250617 started 2024-08-25T16:07:52.3
Examining file ./1250617_g892_uvot_sky_srclist.fits
The exposure ID is 746294872
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (344.5740,1.0317) with a roll angle of 39.8
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 (344.5510,1.0360) with a radius of 3.000 arc min
This is 1.402 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 (344.5720,1.0268) with a radius of 0.045 arc min
This is 0.317 arc min from the center of the uvot region
The area of the XRT error circle is 0.006 sq. arc min
The UVOT/XRT overlap is 0.006 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 3 of trigger 1250617
find_uvot_ag.pl vrs. 2023-04-25a fem started at 240825d23h26m29s962701usUT
Observation start time is 2024-08-25T16:07:52.3
Examining file ./1250617_g892_uvot_catalog_srclist.fits
The exposure ID is 746294872
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 49 detected source(s) for 1250617_g892
Aspect correction adds 0.00242 degrees (0.581 sec of time = 8.71 arc sec) to RA
Aspect correction adds 0.00076 degrees ( 2.75 arcsec) to Dec
Total aspect correction is 9.14 arcsec
Star catalogs centered at 344.5696 , 1.0319 with radius 8.53 arc min.
n_usno: 476 n_gsc: 452
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 10.89492
RA DEC Mag Color
bright star 0: 344.48330 (22:57:55.99) 0.98061 (+00:58:50.2) 10.89 USNO-V
Mean distance difference (CAT_DELTA) for 44 matched entries is 0.613" for 1250617_g892
Mean and std. dev of mag. difference (MAG_DELTA) are 1.598 and 0.815 for 1250617_g892
Found 5 entries without IDs and 1 entries that are acceptable afterglow candidates for 1250617_g892.
Acceptable entries have no ID, XRT distances < 6.75", 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=344.5510 (22:58:12.24) DEC= 1.0360 (+01:02:09.6)
XRT distances are from RA=344.5720 (22:58:17.28) DEC= 1.0268 (+01:01:36.3)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1250617_g892 with 5x5 stamp
ra=344.57206 (22:58:17.29) dec=1.02682 (+01:01:36.5) +/- 1.1" mag=18.44+/-0.35
dist=0.3 REFID=27
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
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=344.57206 (22:58:17.29) dec=1.02682 (+01:01:36.5) +/- 1.1" mag=18.44+/-0.35 dist=0.3 REFID=27
There are no candidates inside BAT error circle, but outside XRT error circle.
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.22, XRT distances < 6.75",
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 3 of trigger 1250617
------ Start for Possible Stand-alone Circular ----
In response to GRB240825 (Swift/BAT trigger 1250617) at 15:52:59 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 858 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 22:58:17.26 = 344.57192
DEC(J2000) = +01:01:36.5 = 1.02680
with a 90%-confidence error radius of about 0.75 arc sec. This position is 0.3
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.94 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.063.
------- notes for trigger 1250617 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 240825d23h26m32s361511usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1250617
-expid=746294872 -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/1250617/
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 746294872.34932 or about 2024:238:16:07:47 UT
Found 472 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 4% of the srclist region. Found 49 sources in
srclist catalog. Found 5 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 4 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 1 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.67 mag. Found 30 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 4% 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?
746294872 858 WHITE 344.57206 1.02682 18.44/19.2 0.3 srclist Yes
746294872 858 WHITE 344.57192 1.02680 17.94/20.7 0.3 image Yes
List afterglow candidates for other finding charts.
746294106 92 WHITE 344.57194 1.02689 15.98/19.2 0.5 srclist Yes
746294106 92 WHITE 344.57192 1.02686 15.57/20.7 0.5 image Yes
746294319 305 U 344.57216 1.02698 17.71/18.1 1.0 srclist Yes
746294319 305 U 344.57196 1.02680 16.91/20.5 0.3 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 1.02680
GRB_ERROR: 0.75
GRB_RA: 344.57192
IMAGE_START_TIME: 16:07:47
MAGNITUDE: 17.94
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT