srclist overlap message for exposure 3 of trigger 1099310
uvot_overlap.pl vrs. 2010-12-20b fem started at 220325d20h48m30s125356usUT
The observation of trigger 1099310 started 2022-03-25T17:31:09.5
Examining file ./1099310_g885_uvot_sky_srclist.fits
The exposure ID is 669922269
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (269.4915,-7.0286) with a roll angle of 88.6
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 (269.4850,-7.0310) with a radius of 3.000 arc min
This is 0.415 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 (269.4875,-7.0359) with a radius of 0.040 arc min
This is 0.499 arc min from the center of the uvot region
The area of the XRT error circle is 0.005 sq. arc min
The UVOT/XRT overlap is 0.005 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 3 of trigger 1099310
find_uvot_ag.pl vrs. 2020-10-30 fem started at 220325d20h49m01s109937usUT
Observation start time is 2022-03-25T17:31:09.5
Examining file ./1099310_g885_uvot_catalog_srclist.fits
The exposure ID is 669922269
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 1099310_g885
*** 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 1099310_g885 has mag 18.88
Aspect correction adds 0.00155 degrees (0.371 sec of time = 5.53 arc sec) to RA
Aspect correction adds 0.00109 degrees ( 3.91 arcsec) to Dec
Total aspect correction is 6.77 arcsec
Star catalogs centered at 269.4930 , -7.0236 with radius 9.13 arc min.
n_usno: 4182 n_gsc: 0
*** WARNING -- bright star catalog has 6 entries brighter than 12 mag
The brightest has mag 10.95
RA DEC Mag Color
bright star 0: 269.40742 (17:57:37.78) -7.10081 (-07:06:02.9) 11.49 USNO-V
bright star 1: 269.36687 (17:57:28.05) -7.01940 (-07:01:09.9) 11.20 USNO-V
bright star 2: 269.55602 (17:58:13.44) -7.14034 (-07:08:25.2) 10.95 USNO-R
bright star 3: 269.42721 (17:57:42.53) -6.90169 (-06:54:06.1) 11.01 USNO-V
bright star 4: 269.40106 (17:57:36.25) -7.12788 (-07:07:40.4) 11.25 USNO-V
bright star 5: 269.64102 (17:58:33.84) -7.00576 (-07:00:20.7) 11.92 USNO-V
Mean distance difference (CAT_DELTA) for 191 matched entries is 0.779" for 1099310_g885
Mean and std. dev of mag. difference (MAG_DELTA) are 2.019 and 0.562 for 1099310_g885
Found 6 entries without IDs and 1 entries that are acceptable afterglow candidates for 1099310_g885.
Acceptable entries have no ID, XRT distances < 6", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=269.4850 (17:57:56.40) DEC=-7.0310 (-07:01:51.6)
XRT distances are from RA=269.4875 (17:57:57.01) DEC=-7.0359 (-07:02:09.3)
-----------------
Entry 43 in the list of sources is a candidate afterglow for 1099310_g885 with 1x1 stamp
ra=269.50790 (17:58:01.90) dec=-6.98538 (-06:59:07.4) +/- 1.1" mag=18.55+/-0.35
dist=195.9 REFID=130
*** The position of this source is inconsistent with the XRT position.
The position is 183.5 arc sec from the BAT position.
src: 43 distr. of nearby unmatched sources: 1 0 0 0 0
Found 4 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
269.5066 -6.9897 16.3 -1 USNO-B1 20.63 18.50 19.45
269.5072 -6.9858 2.8 -1 USNO-B1 18.63 16.23 17.30 *
269.5073 -6.9856 2.2 -1 USNO-B1 17.85 15.38 16.48 *
269.5133 -6.9847 19.4 -1 USNO-B1 21.15 18.85 19.87
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
269.4881 -7.0334 9.4 -1 USNO-B1 18.56 16.26 17.28
269.4856 -7.0354 7.1 -1 USNO-B1 20.69 18.59 19.52
The closest star is 7.10" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=269.48848 (17:57:57.24) dec=-7.03368 (-07:02:01.2) +/- 1.1" mag=18.70+/-0.35 dist=8.7 REFID=189
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 < 6",
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 3 of trigger 1099310
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 GRB220325 (Swift/BAT trigger 1099310) at 17:16:23 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 857 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
0.915.
------- notes for trigger 1099310 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 220325d20h49m09s237176usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1099310
-expid=669922269 -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/1099310/
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 669922269.53258 or about 2022:084:17:31:04 UT
Found 4178 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 34% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 6 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 21 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. 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
20.11 mag. Found 314 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 31% of the Genie image region.
Genie image analysis:
Found 149910.6 counts in the large background region of 5548.0 pixels or a rate
of 27.021 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 19.39 mag. for a
4-arcsec aperture.
Found 5645.6 counts in the XRT position region of 199.0 pixels or a rate of
28.370 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 1.641 +/- 0.542 (1-sigma) cps or
19.07 mag and a range from 18.76 to 19.50 mag. The 3-sigma UL at the XRT
position is 3.267 cps or 18.32 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.88 mag.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 269.4885 dec= -7.0337 mag=18.70 sep=8.74".
The closest srclist source has ra= 269.4885 dec= -7.0337 mag=18.70 sep=8.74".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 269.4883 dec= -7.0335 mag=18.87 sep=8.92". The closest Genie
source has ra= 269.4883 dec= -7.0335 mag=18.87 sep=8.92".
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 857 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 17:57:57.18 = 269.48827
DEC(J2000) = -07:02:00.8 = -7.03355
with a 90%-confidence error radius of about 0.65 arc sec. This position is 8.92
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.87 with a 1-sigma error of about 0.16. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.915.
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?
669922269 857 WHITE srclist found no candidates.
669922269 857 WHITE image found no candidates.
List afterglow candidates for other finding charts.
669921526 114 WHITE srclist found no candidates.
669921526 114 WHITE image found no candidates.
669921738 326 U srclist found no candidates.
669921738 326 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -7.03592
GRB_ERROR: 6
GRB_RA: 269.48754
IMAGE_START_TIME: 17:31:04
MAGNITUDE: 18.3
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT