image overlap message for exposure 2 of trigger 1194500
uvot_overlap.pl vrs. 2010-12-20b fem started at 231104d08h08m29s317553usUT
The observation of trigger 1194500 started 2023-11-04T02:02:32.6
Examining file ./1194500_g892_uvot_sky_image.fits
The exposure ID is 720756152
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (23.7606,83.7962) with a roll angle of 344.1
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 (23.7890,83.7910) with a radius of 3.000 arc min
This is 0.361 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 7.17 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (23.8063,83.7935) with a radius of 0.037 arc min
This is 0.338 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 2 of trigger 1194500
find_uvot_ag.pl vrs. 2023-04-25a fem started at 231104d08h08m38s936857usUT
Observation start time is 2023-11-04T02:02:32.6
Examining file ./1194500_g892_uvot_catalog_image.fits
The exposure ID is 720756152
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 13 detected source(s) for 1194500_g892
Aspect correction adds -0.00571 degrees (-1.371 sec of time = -2.23 arc sec) to RA
Aspect correction adds 0.00164 degrees ( 5.92 arcsec) to Dec
Total aspect correction is 6.32 arcsec
Star catalogs centered at 23.7510 , 83.7984 with radius 2.65 arc min.
n_usno: 112 n_gsc: 82
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 11 matched entries is 0.608" for 1194500_g892
Mean and std. dev of mag. difference (MAG_DELTA) are 0.764 and 0.260 for 1194500_g892
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 1194500_g892.
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=23.7890 (01:35:09.36) DEC=83.7910 (+83:47:27.6)
XRT distances are from RA=23.8063 (01:35:13.52) DEC=83.7935 (+83:47:36.5)
-----------------
Entry 2 in the list of sources is a candidate afterglow for 1194500_g892 with genie
ra=23.64651 (01:34:35.16) dec=83.79408 (+83:47:38.7) +/- 0.6" mag=19.18+/-0.15
dist=62.2 REFID=9 major=2.5 minor=1.9 flag=2 (blended)
*** The position of this source is inconsistent with the XRT position.
The position is 56.6 arc sec from the BAT position.
Found 3 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
23.6518 83.7942 2.1 -1 USNO-B1 19.52 18.11 18.74 *
23.6454 83.7954 4.6 -1 USNO-B1 99.99 19.57 99.99
23.6522 83.7942 2.3 -1 GSC2.3 18.09 19.57 18.27 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 12 in the list of sources is a candidate afterglow for 1194500_g892 with genie
ra=23.67892 (01:34:42.94) dec=83.81850 (+83:49:06.6) +/- 1.2" mag=21.67+/-0.37
dist=102.8 REFID=2 major=1.4 minor=1.1 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 107.8 arc sec from the BAT position.
This source is near the edge of image (0.895)
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
23.6752 83.8163 8.0 -1 USNO-B1 99.99 19.77 99.99
23.6606 83.8235 19.4 -1 USNO-B1 20.02 19.12 19.52
23.6764 83.8163 7.9 -1 GSC2.3 20.14 99.99 99.99
23.6611 83.8235 19.3 -1 GSC2.3 18.89 19.85 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:
There are 34641.180 counts in the bkg source region of 6142.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 5.640 counts/pixel (5-sig UL in 4" is 20.41 mag) for 1194500_g892
There are 1056.6226 counts in the xrt source region of 198.00000 pixels.
Rate in xrt region with 8 arcsec radius is 5.336 counts/pixel for 1194500_g892
There are 6812.8340 counts in the xrt_bkg source region of 1245.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 5.472 counts/pixel (5-sig UL in 4" is 20.43 mag) for 1194500_g892
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.97, 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: 1194500_720756152_231104d08h08m38s936857usUT_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(23.7606,83.7962,45")
fk5;-circle(23.7291486964767,83.8030730201823,6")
fk5;-circle(23.6465074801033,83.794083169875,6")
fk5;-circle(23.7702839972495,83.8103092345752,6")
Region file: 1194500_720756152_231104d08h08m38s936857usUT_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(23.80633,83.79347,8")
Region file: 1194500_720756152_231104d08h08m38s936857usUT_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(23.80633,83.79347,25")
fk5;-circle(23.80633,83.79347,15")
image paragraph message for exposure 2 of trigger 1194500
SRCLIST PROBLEM: srclist filled telemetry buffer
------ Start for Possible Stand-alone Circular ----
In response to GRB231104 (Swift/BAT trigger 1194500) at 01:47:39 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 860 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
0.156.
------- notes for trigger 1194500 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 231104d08h08m42s495875usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1194500
-expid=720756152 -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/1194500/
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 720756152.59932 or about 2023:308:02:02:27 UT
Found 942 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 8% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 76 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 13 source(s) in Genie image catalog. 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 20.97 mag. Found 108 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
10% of the Genie image region.
Genie image analysis:
Found 34641.2 counts in the large background region of 6142.0 pixels or a rate
of 5.640 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 20.24 mag. for a
4-arcsec aperture.
Found 1056.6 counts in the XRT position region of 198.0 pixels or a rate of
5.336 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.179 +/- 0.234 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.701 cps or 19.99 mag. The number of srclist
sources filled the available telemetry. The weakest source detected was 19.62
mag. The closest srclist source has ra= 23.7292 dec= 83.8030 mag=18.29
sep=45.54". The closest Genie source has ra= 23.7292 dec= 83.8031 mag=16.41
sep=45.77".
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?
720756152 859 WHITE srclist found no candidates.
720756152 859 WHITE image found no candidates.
List afterglow candidates for other finding charts.
720755595 302 ? srclist data are not available.
720755595 302 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 83.79347
GRB_ERROR: 5.5
GRB_RA: 23.80633
IMAGE_START_TIME: 02:02:27
MAGNITUDE: 20.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT