image overlap message for exposure 2 of trigger 1244778
uvot_overlap.pl vrs. 2010-12-20b fem started at 240725d03h01m37s918785usUT
The observation of trigger 1244778 started 2024-07-25T02:52:51.2
Examining file 1244778_g914_uvot_sky_image.fits
The exposure ID is 743568771
The exposure time is 149.846 (seconds)
The filter is WHITE.
The uvot region is centered at (299.0530,-64.6743) with a roll angle of 187.8
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 (299.0540,-64.6670) with a radius of 3.000 arc min
This is 0.440 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
Could not find the location of an XRT error circle
image afterglow message for exposure 2 of trigger 1244778
find_uvot_ag.pl vrs. 2023-04-25a fem started at 240725d03h01m38s958014usUT
Observation start time is 2024-07-25T02:52:51.2
Examining file 1244778_g914_uvot_catalog_image.fits
The exposure ID is 743568771
The exposure is 149.846 sec.
The bin size is 2 pixels
The filter is WHITE
There are 17 detected source(s) for 1244778_g914
Aspect correction adds -0.00140 degrees (-0.336 sec of time = -2.16 arc sec) to RA
Aspect correction adds -0.00269 degrees (-9.69 arcsec) to Dec
Total aspect correction is 9.92 arcsec
Star catalogs centered at 299.0429 , -64.6707 with radius 2.55 arc min.
n_usno: 100 n_gsc: 113
Bright star catalog has no entries brighter than 12 mag
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 16 matched entries is 0.443" for 1244778_g914
Mean and std. dev of mag. difference (MAG_DELTA) are 1.085 and 0.358 for 1244778_g914
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1244778_g914.
Acceptable entries have no ID, BAT distance < 200" or XRT distance < 10", 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=299.0540 (19:56:12.96) DEC=-64.6670 (-64:40:01.2)
XRT distances are as reported in catalog file.
-----------------
Entry 8 in the list of sources is a candidate afterglow for 1244778_g914 with genie
ra=299.02551 (19:56:06.12) dec=-64.65273 (-64:39:09.8) +/- 0.7" mag=20.19+/-0.19
dist=67.6 REFID=2 major=0.6 minor=0.2 flag=0
This source is near the edge of image (1.003)
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
299.0239 -64.6523 2.8 -1 USNO-B1 15.01 14.02 14.46 *
299.0240 -64.6524 2.7 -1 GSC2.3 13.78 15.05 99.99 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" or brighter than 12 mag
There are 42352.355 counts in the bkg source region of 6068.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 6.980 counts/pixel (5-sig UL in 4" is 20.29 mag) for 1244778_g914
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.29, BAT distances < 200",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1244778_743568771_240725d03h01m38s958014usUT_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(299.0530,-64.6743,45")
fk5;-circle(299.077015948956,-64.6686099074079,6")
fk5;-circle(299.030363369225,-64.6776983671427,6")
fk5;-circle(299.075680785211,-64.6827033407213,6")
image paragraph message for exposure 2 of trigger 1244778
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: partial overlap
SRCLIST PROBLEM: srclist filled telemetry buffer
See notes for more details.
------ Start for Possible Stand-alone Circular ----
In response to GRB240725 (Swift/BAT trigger 1244778) at 02:37:36 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 880 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 25% of
the BAT 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
BAT 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
0.068.
------- notes for trigger 1244778 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 240725d03h01m39s975627usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1244778
-expid=743568771 -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/1244778/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
No XRT position found for srclist. No XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 743568771.23286 or about 2024:207:02:52:46 UT
Found 1337 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 11% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 43 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.66 mag.
Found 17 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 20.29 mag. Found 113 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
12% of the Genie image region.
Genie image analysis:
Found 42352.4 counts in the large background region of 6068.0 pixels or a rate
of 6.980 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 20.12 mag. for a
4-arcsec aperture. The number of srclist sources filled the available
telemetry. The weakest source detected was 19.60 mag.
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?
743568771 880 WHITE srclist found no candidates.
743568771 880 WHITE image found no candidates.
List afterglow candidates for other finding charts.
743568194 303 U srclist found no candidates.
743568194 303 U image found no candidates.
------- Tokens for Quick GCN -------