image overlap message for exposure 1 of trigger 1252695
uvot_overlap.pl vrs. 2010-12-20b fem started at 250910d15h26m35s093496usUT
The observation of trigger 1252695 started 2024-09-05T18:28:33.3
Examining file 1252695_g149_uvot_sky_image.fits
The exposure ID is 747253713
The exposure time is 149.868 (seconds)
The filter is WHITE.
*** Warning -- found 11348 null pixels in the image.
The uvot region is centered at (345.7998,35.5273) with a roll angle of 1.2
It is square with sides of 2.68 arc min. for an area of 7.17 sq arc min
The BAT error circle is centered at (345.7990,35.4950) with a radius of 3.000 arc min
This is 1.941 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 6.34 sq. arc min or 0.22 of the BAT error circle
The XRT error circle is centered at (345.8021,35.5227) with a radius of 0.068 arc min
This is 0.302 arc min from the center of the uvot region
The area of the XRT error circle is 0.015 sq. arc min
The UVOT/XRT overlap is 0.00 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1252695
find_uvot_ag.pl vrs. 2023-04-25a fem started at 250910d15h26m35s946173usUT
Observation start time is 2024-09-05T18:28:33.3
Examining file 1252695_g149_uvot_catalog_image.fits
The exposure ID is 747253713
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 6 detected source(s) for 1252695_g149
Aspect correction adds 0.00038 degrees (0.091 sec of time = 1.11 arc sec) to RA
Aspect correction adds 0.00151 degrees ( 5.43 arcsec) to Dec
Total aspect correction is 5.54 arcsec
Star catalogs centered at 345.7953 , 35.5272 with radius 2.50 arc min.
n_usno: 93 n_gsc: 92
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 5 matched entries is 0.300" for 1252695_g149
Mean and std. dev of mag. difference (MAG_DELTA) are 0.728 and 0.387 for 1252695_g149
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1252695_g149.
Acceptable entries have no ID, XRT distances < 10.25", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
Magnitude criteria will be applied later.
BAT distances are from RA=345.7990 (23:03:11.76) DEC=35.4950 (+35:29:42.0)
XRT distances are from RA=345.8021 (23:03:12.51) DEC=35.5227 (+35:31:21.6)
-----------------
Entry 2 in the list of sources is a candidate afterglow for 1252695_g149 with genie
ra=345.77591 (23:03:06.22) dec=35.51751 (+35:31:03.0) +/- 0.6" mag=19.41+/-0.16
dist=79.1 REFID=1 major=4.4 minor=3.8 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 105.6 arc sec from the BAT position.
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
345.7709 35.5173 14.8 -1 USNO-B1 13.45 12.00 12.64
345.7709 35.5173 14.8 -1 GSC2.3 12.25 13.61 12.85
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 4.4
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 35449.488 counts in the bkg source region of 3798.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 9.334 counts/pixel (5-sig UL in 4" is 20.14 mag) for 1252695_g149
There are 292.60208 counts in the xrt source region of 33.000000 pixels.
Rate in xrt region with 8 arcsec radius is 8.867 counts/pixel for 1252695_g149
There are 4548.2798 counts in the xrt_bkg source region of 476.00000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 9.555 counts/pixel (5-sig UL in 4" is 20.12 mag) for 1252695_g149
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 20.69, XRT distances < 10.25",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1252695_747253713_250910d15h26m35s946173usUT_bkg.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(345.7998,35.5273,45")
fk5;-circle(345.801632721361,35.5268018344715,6")
fk5;-circle(345.792676885194,35.5311115475572,6")
Region file: 1252695_747253713_250910d15h26m35s946173usUT_xrt.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(345.80213,35.52267,8")
Region file: 1252695_747253713_250910d15h26m35s946173usUT_xrt_bkg.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(345.80213,35.52267,25")
fk5;-circle(345.80213,35.52267,15")
fk5;-circle(345.801632721361,35.5268018344715,6")
image paragraph message for exposure 1 of trigger 1252695
IMAGE PROBLEM: no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB240905 (Swift/BAT trigger 1252695) at 18:26:03 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 115 seconds after the BAT trigger. No credible afterglow candidate has
been found in the initial data products. The 2.7'x2.7' sub-image covers none of
the XRT error circle. 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 0.077.
------- notes for trigger 1252695 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 250910d15h26m37s656959usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1252695
-expid=747253713 -msg_image
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/1252695/
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 747253713.27272 or about 2024:249:18:28:28 UT
Found 567 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 10% of the srclist region. Found 85 sources in
srclist catalog. Found 13 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 mag.
Found 6 source(s) in Genie image catalog. Found 1 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 20.69 mag. Found 92 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 10% of the
Genie image region. The Genie image is INCOMPLETE with 11348 null pixels.
Genie image analysis:
Found 35449.5 counts in the large background region of 3798.0 pixels or a rate
of 9.334 counts/pixel in a radius of 45.0 arcsec. Based on this background, the
typical 5-sigma UL at a random point in the Genie image is 19.96 mag. for a
4-arcsec aperture. The closest srclist source has ra= 345.8017 dec= 35.5268
mag=17.83 sep=14.97". The closest Genie source has ra= 345.8016 dec= 35.5268
mag=17.18 sep=14.95".
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?
747253713 115 WHITE srclist found no candidates.
747253713 115 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 35.52267
GRB_ERROR: 10.25
GRB_RA: 345.80213
IMAGE_START_TIME: 18:28:28
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT