srclist overlap message for exposure 1 of trigger 1247745
uvot_overlap.pl vrs. 2010-12-20b fem started at 240809d14h09m11s812086usUT
The observation of trigger 1247745 started 2024-08-09T08:32:41.6
Examining file ./1247745_g131_uvot_sky_srclist.fits
The exposure ID is 744885161
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (237.5430,-2.3209) with a roll angle of 285.5
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 (237.5510,-2.3210) with a radius of 3.000 arc min
This is 0.478 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 (237.5440,-2.3179) with a radius of 0.033 arc min
This is 0.188 arc min from the center of the uvot region
The area of the XRT error circle is 0.003 sq. arc min
The UVOT/XRT overlap is 0.003 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 1 of trigger 1247745
find_uvot_ag.pl vrs. 2023-04-25a fem started at 240809d14h09m16s434495usUT
Observation start time is 2024-08-09T08:32:41.6
Examining file ./1247745_g131_uvot_catalog_srclist.fits
The exposure ID is 744885161
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 94 detected source(s) for 1247745_g131
Aspect correction adds -0.00219 degrees (-0.527 sec of time = -7.89 arc sec) to RA
Aspect correction adds 0.00065 degrees ( 2.34 arcsec) to Dec
Total aspect correction is 8.23 arcsec
Star catalogs centered at 237.5527 , -2.3172 with radius 5.85 arc min.
n_usno: 544 n_gsc: 483
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 9.9793
RA DEC Mag Color
bright star 0: 237.53078 (15:50:07.39) -2.36987 (-02:22:11.5) 9.98 USNO-V
bright star 1: 237.62365 (15:50:29.68) -2.34960 (-02:20:58.6) 10.46 USNO-V
Mean distance difference (CAT_DELTA) for 46 matched entries is 0.764" for 1247745_g131
Mean and std. dev of mag. difference (MAG_DELTA) are 1.460 and 0.752 for 1247745_g131
Found 50 entries without IDs and 1 entries that are acceptable afterglow candidates for 1247745_g131.
Acceptable entries have no ID, XRT distances < 5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
44 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=237.5510 (15:50:12.24) DEC=-2.3210 (-02:19:15.6)
XRT distances are from RA=237.5440 (15:50:10.56) DEC=-2.3179 (-02:19:04.4)
*** WARNING 53 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1247745_g131 with 5x5 stamp
ra=237.54389 (15:50:10.53) dec=-2.31750 (-02:19:03.0) +/- 1.1" mag=13.86+/-0.35
dist=1.5 REFID=2
src: 0 distr. of nearby unmatched sources: 0 0 0 0 0
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
237.5421 -2.3128 18.2 -1 USNO-B1 20.42 19.18 19.73
237.5428 -2.3185 5.2 -1 GSC2.3 20.41 99.99 99.99
##### This source remains a candidate #####
It has no entries 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
237.5428 -2.3185 4.7 -1 GSC2.3 20.41 99.99 99.99
The closest star is 4.69" away.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=237.54389 (15:50:10.53) dec=-2.31750 (-02:19:03.0) +/- 1.1" mag=13.86+/-0.35 dist=1.5 REFID=2
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 < 5",
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 1247745
Catalogued source 4.7" from XRT position may affect AG photometry.
------ Start for Possible Stand-alone Circular ----
In response to GRB240809 (Swift/BAT trigger 1247745) at 08:30:29 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 98 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 15:50:10.51 = 237.54381
DEC(J2000) = -02:19:03.2 = -2.31756
with a 90%-confidence error radius of about 0.61 arc sec. This position is 1.4
arc sec. from the center of the XRT error circle. The estimated magnitude is
14.47 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.249.
------- notes for trigger 1247745 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 240809d14h09m19s480103usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1247745
-expid=744885161 -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/1247745/
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 744885161.5507 or about 2024:222:08:32:36 UT
Found 540 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 10% of the srclist region. Found 94 sources in
srclist catalog. Found 50 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 6 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
20.60 mag. Found 83 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 11% 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?
744885161 97 WHITE 237.54389 -2.31750 13.86/19.2 1.5 srclist Yes
744885161 97 WHITE 237.54381 -2.31756 14.47/20.6 1.4 image Yes
List afterglow candidates for other finding charts.
744885373 309 U 237.54397 -2.31752 15.53/18.1 8.9 srclist Yes
744885373 309 U 237.54387 -2.31747 15.07/20.4 9.2 image Yes
744885928 864 WHITE 237.54380 -2.31760 17.34/19.2 9.4 srclist Yes
744885928 864 WHITE 237.54394 -2.31752 16.67/20.6 9.0 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -2.31756
GRB_ERROR: 0.61
GRB_RA: 237.54381
IMAGE_START_TIME: 08:32:36
MAGNITUDE: 14.47
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT