srclist overlap message for exposure 2 of trigger 1299965
uvot_overlap.pl vrs. 2010-12-20b fem started at 250331d15h28m44s443437usUT
The observation of trigger 1299965 started 2025-03-31T04:34:49.3
Examining file ./1299965_g905_uvot_sky_srclist.fits
The exposure ID is 765088489
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (71.3713,43.8023) with a roll angle of 252.5
It is square with sides of 12.05 arc min. for an area of 145.15 sq arc min
The BAT error circle is centered at (71.3810,43.8050) with a radius of 3.000 arc min
This is 0.451 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 28.27 sq. arc min or 1.00 of the BAT error circle
The XRT error circle is centered at (71.3722,43.8126) with a radius of 0.060 arc min
This is 0.618 arc min from the center of the uvot region
The area of the XRT error circle is 0.011 sq. arc min
The UVOT/XRT overlap is 0.011 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 2 of trigger 1299965
find_uvot_ag.pl vrs. 2023-04-25a fem started at 250331d15h28m57s405228usUT
Observation start time is 2025-03-31T04:34:49.3
Examining file ./1299965_g905_uvot_catalog_srclist.fits
The exposure ID is 765088489
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 1299965_g905
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 1.000
srclist_overlap returned: xrt_overlap 1.000
Dimmest detected source in 1299965_g905 has mag 18.83
Aspect correction adds -0.00090 degrees (-0.217 sec of time = -2.35 arc sec) to RA
Aspect correction adds 0.00001 degrees ( 0.05 arcsec) to Dec
Total aspect correction is 2.35 arcsec
Star catalogs centered at 71.3722 , 43.7979 with radius 8.63 arc min.
n_usno: 1995 n_gsc: 2423
*** WARNING -- bright star catalog has 8 entries brighter than 12 mag
The brightest has mag 7.87174
RA DEC Mag Color
bright star 0: 71.39785 (04:45:35.48) 43.79299 (+43:47:34.8) 11.04 USNO-V
bright star 1: 71.33811 (04:45:21.15) 43.78571 (+43:47:08.6) 7.87 USNO-V
bright star 2: 71.24488 (04:44:58.77) 43.71656 (+43:42:59.6) 11.43 USNO-V
bright star 3: 71.36579 (04:45:27.79) 43.71883 (+43:43:07.8) 11.93 GSC-V
bright star 4: 71.44958 (04:45:47.90) 43.71524 (+43:42:54.9) 11.86 GSC-V
bright star 5: 71.53094 (04:46:07.42) 43.76101 (+43:45:39.6) 9.34 GSC-V
bright star 6: 71.18700 (04:44:44.88) 43.77442 (+43:46:27.9) 11.80 GSC-V
bright star 7: 71.43903 (04:45:45.37) 43.66636 (+43:39:58.9) 11.83 GSC-V
Mean distance difference (CAT_DELTA) for 148 matched entries is 0.809" for 1299965_g905
Mean and std. dev of mag. difference (MAG_DELTA) are 1.438 and 0.418 for 1299965_g905
Found 44 entries without IDs and 3 entries that are acceptable afterglow candidates for 1299965_g905.
Acceptable entries have no ID, XRT distances < 9", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
37 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=71.3810 (04:45:31.44) DEC=43.8050 (+43:48:18.0)
XRT distances are from RA=71.3722 (04:45:29.32) DEC=43.8126 (+43:48:45.2)
-----------------
Entry 17 in the list of sources is a candidate afterglow for 1299965_g905 with 3x3 stamp
ra=71.42557 (04:45:42.14) dec=43.81491 (+43:48:53.7) +/- 1.1" mag=17.41+/-0.35
dist=139.0 REFID=32
*** The position of this source is inconsistent with the XRT position.
The position is 121.2 arc sec from the BAT position.
src: 17 distr. of nearby unmatched sources: 1 0 0 0 0
Found 6 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
71.4248 43.8144 2.8 -1 USNO-B1 15.85 14.38 15.03 *
71.4239 43.8173 9.6 -1 USNO-B1 20.59 18.77 19.58
71.4275 43.8174 10.1 -1 USNO-B1 17.68 15.66 16.55
71.4247 43.8143 3.1 -1 GSC2.3 14.38 15.78 14.72 *
71.4240 43.8173 9.6 -1 GSC2.3 18.78 20.78 19.28
71.4276 43.8173 10.1 -1 GSC2.3 15.73 17.61 16.08
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 66 in the list of sources is a candidate afterglow for 1299965_g905 with 3x3 stamp
ra=71.34027 (04:45:21.66) dec=43.76919 (+43:46:09.1) +/- 1.1" mag=18.15+/-0.35
dist=176.8 REFID=101
*** The position of this source is inconsistent with the XRT position.
The position is 166.8 arc sec from the BAT position.
src: 66 srclist_match has ID
src: 66 distr. of nearby unmatched sources: 0 0 0 0 0
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
71.3379 43.7649 16.5 -1 USNO-B1 99.99 18.67 99.99
71.3437 43.7685 9.2 -1 GSC2.3 20.53 99.99 99.99
71.3444 43.7670 13.3 -1 GSC2.3 19.17 22.22 99.99
71.3400 43.7690 0.9 -1 GSC2.3 99.99 16.84 15.95 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 76 in the list of sources is a candidate afterglow for 1299965_g905 with 3x3 stamp
ra=71.39478 (04:45:34.75) dec=43.85722 (+43:51:26.0) +/- 1.1" mag=18.05+/-0.35
dist=171.1 REFID=82
*** The position of this source is inconsistent with the XRT position.
The position is 191.4 arc sec from the BAT position.
src: 76 srclist_match has ID
src: 76 distr. of nearby unmatched sources: 2 0 0 0 0
Found 16 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
71.3938 43.8523 17.9 -1 USNO-B1 18.60 16.69 17.54
71.3956 43.8557 5.8 -1 USNO-B1 19.46 17.35 18.29
71.3888 43.8571 15.4 -1 USNO-B1 18.16 16.75 17.37
71.3954 43.8560 4.6 -1 USNO-B1 18.06 16.32 17.09
71.3952 43.8567 1.9 -1 USNO-B1 17.15 14.80 15.85 *
71.3971 43.8584 7.5 -1 USNO-B1 20.88 17.95 19.25
71.4018 43.8582 18.5 -1 USNO-B1 18.73 16.73 17.62
71.3897 43.8611 19.3 -1 USNO-B1 20.39 18.86 19.54
71.3938 43.8522 18.1 -1 GSC2.3 16.91 18.47 17.40
71.3958 43.8555 6.7 -1 GSC2.3 17.28 99.99 99.99
71.3889 43.8571 15.2 -1 GSC2.3 16.77 18.07 16.97
71.3950 43.8570 1.1 -1 GSC2.3 15.31 16.66 15.13 *
71.3972 43.8584 7.7 -1 GSC2.3 18.64 99.99 99.99
71.4019 43.8582 18.7 -1 GSC2.3 16.97 18.40 17.22
71.3897 43.8611 19.1 -1 GSC2.3 18.73 20.15 19.20
71.3943 43.8610 13.8 -1 GSC2.3 20.08 99.99 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 2 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
71.3695 43.8129 7.2 -1 USNO-B1 19.66 17.65 18.54
71.3696 43.8129 6.8 -1 GSC2.3 17.50 19.21 18.30
The closest star is 6.83" away.
List UVOT sources within 10" of the XRT position:
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 19.22, XRT distances < 9",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
srclist paragraph message for exposure 2 of trigger 1299965
SRCLIST PROBLEM: srclist filled telemetry buffer
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
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 GRB250331 (Swift/BAT trigger 1299965) at 04:19:43 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 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 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 large, but uncertain, extinction expected.
------- notes for trigger 1299965 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 250331d15h29m02s307032usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1299965
-expid=765088489 -meonly -msg_srclist
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/1299965/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for xrt position. XRT position found for srclist.
XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 765088489.2986 or about 2025:091:04:34:44 UT
Found 2354 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 21% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 44 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 26 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 25 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.05 mag. Found 236 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 23% of the Genie image region.
Genie image analysis:
Found 182925.7 counts in the large background region of 6060.0 pixels or a rate
of 30.186 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 19.33 mag. for a
4-arcsec aperture.
Found 6223.5 counts in the XRT position region of 200.0 pixels or a rate of
31.117 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 1.797 +/- 0.569 (1-sigma) cps or
18.97 mag and a range from 18.67 to 19.38 mag. The 3-sigma UL at the XRT
position is 3.505 cps or 18.24 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.83 mag. The closest
srclist source has ra= 71.3765 dec= 43.8083 mag=16.94 sep=18.96".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 71.3756 dec= 43.8121 mag=18.71 sep=9.02". The closest Genie
source has ra= 71.3756 dec= 43.8121 mag=18.71 sep=9.02".
This paragraph is only useful if the XRT position is grossly wrong. There are 4
candidate(s) in the image data with mag < 19.49 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=71.38727
(04:45:32.94), DEC=43.79276 (+43:47:33.9) (J2000). It has a mag of 16.13. It is
47.0" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 870 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 04:45:32.94 = 71.38727
DEC(J2000) = +43:47:33.9 = 43.79276
with a 90%-confidence error radius of about 0.61 arc sec. The estimated
magnitude is 16.13 with a 1-sigma error of about 0.14. No correction has been
made for the large, but uncertain, extinction expected.
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 870 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 04:45:30.14 = 71.37558
DEC(J2000) = +43:48:43.6 = 43.81210
with a 90%-confidence error radius of about 0.65 arc sec. This position is 9.02
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.71 with a 1-sigma error of about 0.16. No correction has been made for the
large, but uncertain, extinction expected.
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?
765088489 870 WHITE srclist found no candidates.
765088489 870 WHITE image found no candidates.
List afterglow candidates for other finding charts.
765087935 316 WHITE srclist found no candidates.
765087935 316 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 43.81256
GRB_ERROR: 9
GRB_RA: 71.37217
IMAGE_START_TIME: 04:34:44
MAGNITUDE: 18.2
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT