image overlap message for exposure 3 of trigger 1278305
uvot_overlap.pl vrs. 2010-12-20b fem started at 250101d17h57m33s540555usUT
The observation of trigger 1278305 started 2025-01-01T13:37:55.2
Examining file ./1278305_g904_uvot_sky_image.fits
The exposure ID is 757431475
The exposure time is 72.533 (seconds)
The filter is WHITE.
The uvot region is centered at (37.0538,19.1498) with a roll angle of 253.8
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 (37.0610,19.1540) 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 7.17 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (37.0692,19.1940) with a radius of 0.047 arc min
This is 2.792 arc min from the center of the uvot region
The area of the XRT error circle is 0.007 sq. arc min
The UVOT/XRT overlap is 0.000 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 3 of trigger 1278305
find_uvot_ag.pl vrs. 2023-04-25a fem started at 250101d17h57m56s036317usUT
Observation start time is 2025-01-01T13:37:55.2
Examining file ./1278305_g904_uvot_catalog_image.fits
The exposure ID is 757431475
The exposure is 72.533 sec.
The bin size is 2 pixels
The filter is WHITE
There are 2 detected source(s) for 1278305_g904
Aspect correction adds -0.00092 degrees (-0.222 sec of time = -3.14 arc sec) to RA
Aspect correction adds -0.00044 degrees (-1.57 arcsec) to Dec
Total aspect correction is 3.51 arcsec
Star catalogs centered at 37.0567 , 19.1561 with radius 2.34 arc min.
n_usno: 37 n_gsc: 32
*** WARNING -- XRT position is outside star catalog search region.
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 2 matched entries is 0.615" for 1278305_g904
Mean and std. dev of mag. difference (MAG_DELTA) are 1.335 and 0.381 for 1278305_g904
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1278305_g904.
Acceptable entries have no ID, XRT distances < 7", 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=37.0610 (02:28:14.64) DEC=19.1540 (+19:09:14.4)
XRT distances are from RA=37.0692 (02:28:16.61) DEC=19.1940 (+19:11:38.5)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 34584.172 counts in the bkg source region of 6318.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 5.474 counts/pixel (5-sig UL in 4" is 19.64 mag) for 1278305_g904
Do not compute counts in XRT region because position is too far from center.
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 20.19, XRT distances < 7",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1278305_757431475_250101d17h57m56s036317usUT_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(37.0538,19.1498,45")
image paragraph message for exposure 3 of trigger 1278305
IMAGE PROBLEM: no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB250101 (Swift/BAT trigger 1278305) at 13:22:50 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 73 seconds with the White filter
starting 870 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 0.164.
------- notes for trigger 1278305 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 250101d17h58m01s461090usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1278305
-expid=757431475 -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/1278305/
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 757431475.22208 or about 2025:002:13:37:50 UT
Found 320 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 3% of the srclist region. Found 36 sources in
srclist catalog. Found 1 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.83 mag.
Found 2 source(s) in Genie image catalog. Found 0 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 20.19 mag. Found 33 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 4% of the
Genie image region. The XRT position was OUTSIDE the star catalog search
region.
Genie image analysis:
Found 34584.2 counts in the large background region of 6318.0 pixels or a rate
of 5.474 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 19.47 mag. for a
4-arcsec aperture.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 37.0684 dec= 19.1942 mag=19.90 sep=2.70".
The closest srclist source has ra= 37.0684 dec= 19.1942 mag=19.90 sep=2.70".
The closest Genie source has ra= 37.0638 dec= 19.1604 mag=19.87 sep=122.61".
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 73 seconds with the White filter
starting 870 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 02:28:16.43 = 37.06844
DEC(J2000) = +19:11:39.1 = 19.19420
with a 90%-confidence error radius of about 1.10 arc sec. This position is 2.70
arc sec. from the center of the XRT error circle. The estimated magnitude is
19.90 with a 1-sigma error of about 0.35. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.164.
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?
757431475 870 WHITE 37.06844 19.19420 19.90/18.8 2.7 srclist Yes
757431475 870 WHITE image found no candidates.
List afterglow candidates for other finding charts.
757430737 132 WHITE 37.06873 19.19442 18.30/19.2 2.1 srclist Yes
757430737 132 WHITE image found no candidates.
757430895 290 ? srclist data are not available.
757430895 290 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 19.19403
GRB_ERROR: 7
GRB_RA: 37.06921
IMAGE_START_TIME: 13:37:50
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT