srclist overlap message for exposure 1 of trigger 1223470
uvot_overlap.pl vrs. 2010-12-20b fem started at 240421d18h35m37s397369usUT
The observation of trigger 1223470 started 2024-04-21T09:45:37.0
Examining file ./1223470_g161_uvot_sky_srclist.fits
The exposure ID is 735385536
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (299.6930,-14.8759) with a roll angle of 78.3
It is square with sides of 8.03 arc min. for an area of 64.51 sq arc min
The BAT error circle is centered at (299.6860,-14.8790) with a radius of 3.000 arc min
This is 0.448 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 (299.7008,-14.8596) with a radius of 0.035 arc min
This is 1.076 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
srclist afterglow message for exposure 1 of trigger 1223470
find_uvot_ag.pl vrs. 2023-04-25a fem started at 240421d18h35m41s679344usUT
Observation start time is 2024-04-21T09:45:37.0
Examining file ./1223470_g161_uvot_catalog_srclist.fits
The exposure ID is 735385536
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 157 detected source(s) for 1223470_g161
Aspect correction adds 0.00192 degrees (0.461 sec of time = 6.68 arc sec) to RA
Aspect correction adds 0.00026 degrees ( 0.93 arcsec) to Dec
Total aspect correction is 6.74 arcsec
Star catalogs centered at 299.6921 , -14.8795 with radius 6.30 arc min.
n_usno: 894 n_gsc: 1127
*** WARNING -- bright star catalog has 5 entries brighter than 12 mag
The brightest has mag 10.65852
RA DEC Mag Color
bright star 0: 299.66551 (19:58:39.72) -14.90965 (-14:54:34.8) 10.66 USNO-V
bright star 1: 299.79279 (19:59:10.27) -14.84463 (-14:50:40.7) 11.39 GSC-F
bright star 2: 299.75168 (19:59:00.40) -14.88099 (-14:52:51.6) 11.21 GSC-F
bright star 3: 299.67758 (19:58:42.62) -14.80654 (-14:48:23.5) 11.97 GSC-F
bright star 4: 299.72742 (19:58:54.58) -14.79940 (-14:47:57.9) 11.57 GSC-F
Mean distance difference (CAT_DELTA) for 134 matched entries is 0.780" for 1223470_g161
Mean and std. dev of mag. difference (MAG_DELTA) are 1.735 and 0.560 for 1223470_g161
Found 24 entries without IDs and 3 entries that are acceptable afterglow candidates for 1223470_g161.
Acceptable entries have no ID, XRT distances < 5.25", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
20 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=299.6860 (19:58:44.64) DEC=-14.8790 (-14:52:44.4)
XRT distances are from RA=299.7008 (19:58:48.20) DEC=-14.8596 (-14:51:34.6)
-----------------
Entry 3 in the list of sources is a candidate afterglow for 1223470_g161 with 1x1 stamp
ra=299.69472 (19:58:46.73) dec=-14.87773 (-14:52:39.8) +/- 1.1" mag=19.28+/-0.35
dist=68.6 REFID=157
*** The position of this source is inconsistent with the XRT position.
The position is 30.7 arc sec from the BAT position.
src: 3 distr. of nearby unmatched sources: 0 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
299.6948 -14.8819 15.2 -1 USNO-B1 20.09 18.84 19.39
299.6962 -14.8802 10.2 -1 USNO-B1 19.86 17.22 18.39
299.6948 -14.8820 15.4 -1 GSC2.3 19.15 20.05 99.99
299.6962 -14.8801 10.2 -1 GSC2.3 17.61 19.75 99.99
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 87 in the list of sources is a candidate afterglow for 1223470_g161 with 1x1 stamp
ra=299.63990 (19:58:33.58) dec=-14.85772 (-14:51:27.8) +/- 1.1" mag=19.03+/-0.35
dist=212.1 REFID=150
*** The position of this source is inconsistent with the XRT position.
The position is 177.8 arc sec from the BAT position.
src: 87 distr. of nearby unmatched sources: 1 0 0 0 0
Found 10 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
299.6446 -14.8567 16.8 -1 USNO-B1 18.59 17.19 17.81
299.6408 -14.8630 19.3 -1 USNO-B1 19.85 18.78 19.26
299.6421 -14.8579 7.6 -1 USNO-B1 18.59 16.96 17.69
299.6401 -14.8568 3.4 -1 USNO-B1 15.84 14.48 15.08 *
299.6446 -14.8568 16.8 -1 GSC2.3 17.45 18.82 99.99
299.6408 -14.8629 19.0 -1 GSC2.3 18.80 20.08 99.99
299.6422 -14.8579 7.9 -1 GSC2.3 17.44 18.82 99.99
299.6408 -14.8557 8.1 -1 GSC2.3 99.99 18.38 99.99
299.6401 -14.8567 3.7 -1 GSC2.3 14.23 16.35 99.99 *
299.6403 -14.8559 6.7 -1 GSC2.3 99.99 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
-----------------
Entry 89 in the list of sources is a candidate afterglow for 1223470_g161 with 1x1 stamp
ra=299.63949 (19:58:33.48) dec=-14.85760 (-14:51:27.4) +/- 1.1" mag=19.28+/-0.35
dist=213.5 REFID=135
*** The position of this source is inconsistent with the XRT position.
The position is 179.2 arc sec from the BAT position.
src: 89 distr. of nearby unmatched sources: 1 0 0 0 0
Found 12 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
299.6446 -14.8567 18.1 -1 USNO-B1 18.59 17.19 17.81
299.6408 -14.8630 20.0 -1 USNO-B1 19.85 18.78 19.26
299.6421 -14.8579 9.1 -1 USNO-B1 18.59 16.96 17.69
299.6401 -14.8568 3.5 -1 USNO-B1 15.84 14.48 15.08 *
299.6358 -14.8538 18.8 -1 USNO-B1 17.05 15.66 16.28
299.6446 -14.8568 18.1 -1 GSC2.3 17.45 18.82 99.99
299.6408 -14.8629 19.7 -1 GSC2.3 18.80 20.08 99.99
299.6422 -14.8579 9.3 -1 GSC2.3 17.44 18.82 99.99
299.6408 -14.8557 8.3 -1 GSC2.3 99.99 18.38 99.99
299.6401 -14.8567 3.8 -1 GSC2.3 14.23 16.35 99.99 *
299.6403 -14.8559 6.8 -1 GSC2.3 99.99 99.99 99.99
299.6358 -14.8537 18.9 -1 GSC2.3 15.85 17.29 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 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.22, XRT distances < 5.25",
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 1 of trigger 1223470
------ Start for Possible Stand-alone Circular ----
In response to GRB240421 (Swift/BAT trigger 1223470) at 09:42:54 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 129 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
0.183.
------- notes for trigger 1223470 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 240421d18h35m45s657244usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1223470
-expid=735385536 -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/1223470/
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 735385536.96746 or about 2024:112:09:45:31 UT
Found 1127 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 19% of the srclist region. Found 157 sources in
srclist catalog. Found 24 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 18 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 20.46 mag. Found 212 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
19% of the Genie image region. The Genie image is INCOMPLETE with 4516 null
pixels.
Genie image analysis:
Found 77454.8 counts in the large background region of 5450.0 pixels or a rate
of 14.212 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 19.73 mag. for a
4-arcsec aperture.
Found 2840.2 counts in the XRT position region of 199.0 pixels or a rate of
14.272 counts/pixel in a radius of 8.0 arcsec. The net count rate (using large
background region) at the XRT position is 0.080 +/- 0.362 (1-sigma) cps or
22.34 mag and a range from 20.49 to 99.99 mag. The 3-sigma UL at the XRT
position is 1.165 cps or 19.44 mag. The closest srclist source has ra= 299.6963
dec= -14.8561 mag=19.09 sep=20.07". The closest Genie source has ra= 299.6968
dec= -14.8559 mag=18.76 sep=19.42".
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?
735385536 128 WHITE srclist found no candidates.
735385536 128 WHITE image found no candidates.
List afterglow candidates for other finding charts.
735385749 341 U srclist found no candidates.
735385749 341 U image found no candidates.
735386279 871 WHITE srclist found no candidates.
735386279 871 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -14.85961
GRB_ERROR: 5.25
GRB_RA: 299.70083
IMAGE_START_TIME: 09:45:31
MAGNITUDE: 19.4
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT