image overlap message for exposure 3 of trigger 1262165
uvot_overlap.pl vrs. 2010-12-20b fem started at 241025d09h24m56s107920usUT
The observation of trigger 1262165 started 2024-10-25T01:51:59.7
Examining file ./1262165_g908_uvot_sky_image.fits
The exposure ID is 751513919
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (333.5950,83.5781) with a roll angle of 302.0
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 (333.3300,83.5660) with a radius of 3.000 arc min
This is 1.920 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 6.22 sq. arc min or 0.22 of the BAT error circle
The XRT error circle is centered at (333.6577,83.5759) with a radius of 0.037 arc min
This is 0.440 arc min from the center of the uvot region
The area of the XRT error circle is 0.004 sq. arc min
The UVOT/XRT overlap is 0.004 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 3 of trigger 1262165
find_uvot_ag.pl vrs. 2023-04-25a fem started at 241025d09h25m40s444093usUT
Observation start time is 2024-10-25T01:51:59.7
Examining file ./1262165_g908_uvot_catalog_image.fits
The exposure ID is 751513919
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 8 detected source(s) for 1262165_g908
Aspect correction adds -0.00552 degrees (-1.326 sec of time = -2.23 arc sec) to RA
Aspect correction adds 0.00152 degrees ( 5.48 arcsec) to Dec
Total aspect correction is 5.91 arcsec
Star catalogs centered at 333.5888 , 83.5777 with radius 2.59 arc min.
n_usno: 86 n_gsc: 56
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 7 matched entries is 0.457" for 1262165_g908
Mean and std. dev of mag. difference (MAG_DELTA) are 1.071 and 0.397 for 1262165_g908
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 1262165_g908.
Acceptable entries have no ID, XRT distances < 5.5", 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=333.3300 (22:13:19.20) DEC=83.5660 (+83:33:57.6)
XRT distances are from RA=333.6577 (22:14:37.85) DEC=83.5759 (+83:34:33.2)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1262165_g908 with genie
ra=333.65472 (22:14:37.13) dec=83.57572 (+83:34:32.6) +/- 0.9" mag=21.06+/-0.26
dist=1.4 REFID=6 major=0.7 minor=0.6 flag=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)
uvot_check_outside found 11 of 11 good pixels
##### This source remains a candidate #####
It has no entries within 3.5" or brighter than 12 mag
-----------------
Entry 8 in the list of sources is a candidate afterglow for 1262165_g908 with genie
ra=333.42115 (22:13:41.08) dec=83.59116 (+83:35:28.2) +/- 0.7" mag=19.83+/-0.17
dist=109.8 REFID=3 major=1.6 minor=1.1 flag=2 (blended)
*** The position of this source is inconsistent with the XRT position.
The position is 97.7 arc sec from the BAT position.
This source is near the edge of image (0.927)
Found 4 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
333.4103 83.5926 6.8 -1 USNO-B1 99.99 18.45 99.99
333.4170 83.5948 13.1 -1 USNO-B1 99.99 18.57 99.99
333.3974 83.5949 16.4 -1 USNO-B1 14.11 11.14 12.45 *
333.3974 83.5948 16.4 -1 GSC2.3 11.25 13.71 12.18 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" or brighter than 12 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=333.65472 (22:14:37.13) dec=83.57572 (+83:34:32.6) +/- 0.9" mag=21.06+/-0.26 dist=1.4 REFID=6 flag=0
There are 35849.410 counts in the bkg source region of 5986.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 5.989 counts/pixel (5-sig UL in 4" is 20.38 mag) for 1262165_g908
There are 1158.9896 counts in the xrt source region of 196.00000 pixels.
Rate in xrt region with 8 arcsec radius is 5.913 counts/pixel for 1262165_g908
There are 6885.3804 counts in the xrt_bkg source region of 1159.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 5.941 counts/pixel (5-sig UL in 4" is 20.38 mag) for 1262165_g908
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 20.93, XRT distances < 5.5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1262165_751513919_241025d09h25m40s444093usUT_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(333.5950,83.5781,45")
fk5;-circle(333.654720704324,83.5757185981739,6")
fk5;-circle(333.617910730221,83.5800300811658,6")
fk5;-circle(333.573461595166,83.5679587916028,6")
Region file: 1262165_751513919_241025d09h25m40s444093usUT_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(333.65771,83.57589,8")
Region file: 1262165_751513919_241025d09h25m40s444093usUT_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(333.65771,83.57589,25")
fk5;-circle(333.65771,83.57589,15")
fk5;-circle(333.617910730221,83.5800300811658,6")
image paragraph message for exposure 3 of trigger 1262165
SRCLIST PROBLEM: srclist filled telemetry buffer
1 source(s) near the XRT position were rejected as afterglow candidate(s). See
notes for details.
------ Start for Possible Stand-alone Circular ----
In response to GRB241025 (Swift/BAT trigger 1262165) at 01:36:50 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 874 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 100% of
the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag.
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
0.250.
------- notes for trigger 1262165 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 241025d09h25m48s081237usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1262165
-expid=751513919 -meonly -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/1262165/
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 751513919.65428 or about 2024:299:01:51:54 UT
Found 1089 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 9% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 69 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 8 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 2 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.93 mag. Found 82 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 8% of the Genie image region.
Genie image analysis:
Found 35849.4 counts in the large background region of 5986.0 pixels or a rate
of 5.989 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 20.20 mag. for a
4-arcsec aperture.
Found 1159.0 counts in the XRT position region of 196.0 pixels or a rate of
5.913 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.036 +/- 0.245 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.736 cps or 19.94 mag. The number of srclist
sources filled the available telemetry. The weakest source detected was 19.69
mag. The closest srclist source has ra= 333.5757 dec= 83.5680 mag=19.42
sep=43.48".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 333.6547 dec= 83.5757 mag=21.06 sep=1.35". The closest Genie
source has ra= 333.6547 dec= 83.5757 mag=21.06 sep=1.35".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 874 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 22:14:37.13 = 333.65472
DEC(J2000) = +83:34:32.6 = 83.57572
with a 90%-confidence error radius of about 0.91 arc sec. This position is 1.35
arc sec. from the center of the XRT error circle. The estimated magnitude is
21.06 with a 1-sigma error of about 0.26. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.250.
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?
751513919 874 WHITE srclist found no candidates.
751513919 874 WHITE 333.65472 83.57572 21.06/20.9 1.4 image Yes
List afterglow candidates for other finding charts.
751513170 125 WHITE 333.65326 83.57560 17.86/19.2 2.1 srclist Yes
751513170 125 WHITE 333.65379 83.57565 17.56/20.9 1.8 image Yes
751513384 339 U srclist found no candidates.
751513384 339 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 83.57589
GRB_ERROR: 5.5
GRB_RA: 333.65771
IMAGE_START_TIME: 01:51:54
MAGNITUDE: 19.9
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT