srclist overlap message for exposure 2 of trigger 1222955
uvot_overlap.pl vrs. 2010-12-20b fem started at 240419d08h17m31s556308usUT
The observation of trigger 1222955 started 2024-04-19T01:53:05.9
Examining file ./1222955_g303_uvot_sky_srclist.fits
The exposure ID is 735184385
The exposure time is undefined.
The filter is U.
The uvot region is centered at (94.5590,-45.0093) with a roll angle of 294.3
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 (94.5680,-45.0110) with a radius of 3.000 arc min
This is 0.393 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 (94.5340,-44.9995) with a radius of 0.037 arc min
This is 1.213 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 2 of trigger 1222955
find_uvot_ag.pl vrs. 2023-04-25a fem started at 240419d08h17m42s390556usUT
Observation start time is 2024-04-19T01:53:05.9
Examining file ./1222955_g303_uvot_catalog_srclist.fits
The exposure ID is 735184385
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 144 detected source(s) for 1222955_g303
Aspect correction adds -0.00254 degrees (-0.609 sec of time = -6.46 arc sec) to RA
Aspect correction adds 0.00106 degrees ( 3.83 arcsec) to Dec
Total aspect correction is 7.51 arcsec
Star catalogs centered at 94.5523 , -45.0075 with radius 8.53 arc min.
n_usno: 1009 n_gsc: 1009
*** WARNING -- bright star catalog has 6 entries brighter than 12 mag
The brightest has mag 10.26488
RA DEC Mag Color
bright star 0: 94.55683 (06:18:13.64) -44.95516 (-44:57:18.6) 11.34 GSC-F
bright star 1: 94.63338 (06:18:32.01) -45.01713 (-45:01:01.7) 10.26 USNO-V
bright star 2: 94.47689 (06:17:54.45) -45.10910 (-45:06:32.8) 11.02 GSC-F
bright star 3: 94.67443 (06:18:41.86) -44.99618 (-44:59:46.3) 11.62 GSC-F
bright star 4: 94.64111 (06:18:33.87) -44.90987 (-44:54:35.5) 11.96 GSC-F
bright star 5: 94.61266 (06:18:27.04) -45.13964 (-45:08:22.7) 11.86 GSC-F
Mean distance difference (CAT_DELTA) for 114 matched entries is 0.780" for 1222955_g303
Mean and std. dev of mag. difference (MAG_DELTA) are 1.532 and 0.854 for 1222955_g303
Found 30 entries without IDs and 5 entries that are acceptable afterglow candidates for 1222955_g303.
Acceptable entries have no ID, XRT distances < 5.5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
16 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=94.5680 (06:18:16.32) DEC=-45.0110 (-45:00:39.6)
XRT distances are from RA=94.5340 (06:18:08.17) DEC=-44.9995 (-44:59:58.3)
-----------------
Entry 14 in the list of sources is a candidate afterglow for 1222955_g303 with 3x3 stamp
ra=94.57752 (06:18:18.61) dec=-44.97419 (-44:58:27.1) +/- 1.1" mag=16.08+/-0.35
dist=143.5 REFID=30
*** The position of this source is inconsistent with the XRT position.
The position is 134.7 arc sec from the BAT position.
src: 14 distr. of nearby unmatched sources: 0 1 0 0 0
Found 8 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
94.5810 -44.9758 10.4 -1 USNO-B1 16.42 14.96 15.61
94.5768 -44.9740 2.1 -1 USNO-B1 13.71 12.96 13.29 *
94.5711 -44.9716 18.8 -1 USNO-B1 19.72 18.69 19.15
94.5806 -44.9726 9.6 -1 USNO-B1 18.15 17.70 17.90
94.5809 -44.9758 10.4 -1 GSC2.3 15.36 16.39 99.99
94.5768 -44.9739 2.2 -1 GSC2.3 12.88 13.65 99.99 *
94.5709 -44.9716 19.3 -1 GSC2.3 18.56 20.29 99.99
94.5806 -44.9724 10.0 -1 GSC2.3 17.86 18.57 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 17 in the list of sources is a candidate afterglow for 1222955_g303 with 3x3 stamp
ra=94.57571 (06:18:18.17) dec=-44.97273 (-44:58:21.8) +/- 1.1" mag=19.06+/-0.35
dist=143.4 REFID=133
*** The position of this source is inconsistent with the XRT position.
The position is 139.2 arc sec from the BAT position.
src: 17 distr. of nearby unmatched sources: 0 1 0 0 0
Found 8 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
94.5810 -44.9758 17.3 -1 USNO-B1 16.42 14.96 15.61
94.5768 -44.9740 5.2 -1 USNO-B1 13.71 12.96 13.29 *
94.5711 -44.9716 12.4 -1 USNO-B1 19.72 18.69 19.15
94.5806 -44.9726 12.4 -1 USNO-B1 18.15 17.70 17.90
94.5809 -44.9758 17.2 -1 GSC2.3 15.36 16.39 99.99
94.5768 -44.9739 5.1 -1 GSC2.3 12.88 13.65 99.99 *
94.5709 -44.9716 12.9 -1 GSC2.3 18.56 20.29 99.99
94.5806 -44.9724 12.4 -1 GSC2.3 17.86 18.57 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 31 in the list of sources is a candidate afterglow for 1222955_g303 with 3x3 stamp
ra=94.57022 (06:18:16.85) dec=-44.96541 (-44:57:55.5) +/- 1.1" mag=19.01+/-0.35
dist=153.6 REFID=115
*** The position of this source is inconsistent with the XRT position.
The position is 164.2 arc sec from the BAT position.
src: 31 distr. of nearby unmatched sources: 0 1 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
94.5632 -44.9667 18.4 -1 USNO-B1 99.99 19.18 99.99
94.5683 -44.9666 6.5 -1 USNO-B1 12.54 11.73 12.09 *
94.5722 -44.9666 6.8 -1 USNO-B1 99.99 18.02 99.99
94.5679 -44.9629 10.9 -1 USNO-B1 18.12 99.99 99.99
94.5649 -44.9619 18.5 -1 USNO-B1 20.14 19.61 19.85
94.5672 -44.9621 14.1 -1 USNO-B1 18.33 17.33 17.77
94.5684 -44.9669 7.1 -1 GSC2.3 12.31 12.64 99.99 *
94.5681 -44.9661 6.0 -1 GSC2.3 15.34 99.99 99.99
94.5670 -44.9621 14.4 -1 GSC2.3 99.99 18.20 99.99
94.5670 -44.9620 14.8 -1 GSC2.3 17.27 18.41 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 32 in the list of sources is a candidate afterglow for 1222955_g303 with 3x3 stamp
ra=94.57254 (06:18:17.41) dec=-44.96549 (-44:57:55.8) +/- 1.1" mag=19.36+/-0.35
dist=157.0 REFID=141
*** The position of this source is inconsistent with the XRT position.
The position is 164.3 arc sec from the BAT position.
src: 32 distr. of nearby unmatched sources: 0 1 0 0 0
Found 8 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
94.5683 -44.9666 11.5 -1 USNO-B1 12.54 11.73 12.09 *
94.5722 -44.9666 4.3 -1 USNO-B1 99.99 18.02 99.99
94.5679 -44.9629 15.1 -1 USNO-B1 18.12 99.99 99.99
94.5672 -44.9621 18.2 -1 USNO-B1 18.33 17.33 17.77
94.5684 -44.9669 11.7 -1 GSC2.3 12.31 12.64 99.99 *
94.5681 -44.9661 11.6 -1 GSC2.3 15.34 99.99 99.99
94.5670 -44.9621 18.6 -1 GSC2.3 99.99 18.20 99.99
94.5670 -44.9620 18.9 -1 GSC2.3 17.27 18.41 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 48 in the list of sources is a candidate afterglow for 1222955_g303 with 3x3 stamp
ra=94.62006 (06:18:28.82) dec=-44.97484 (-44:58:29.4) +/- 1.1" mag=18.87+/-0.35
dist=236.4 REFID=96
*** The position of this source is inconsistent with the XRT position.
The position is 185.8 arc sec from the BAT position.
src: 48 distr. of nearby unmatched sources: 0 0 0 0 0
Found 6 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
94.6143 -44.9741 14.9 -1 USNO-B1 21.27 20.46 20.82
94.6140 -44.9737 16.1 -1 USNO-B1 99.99 18.58 99.99
94.6194 -44.9740 3.3 -1 USNO-B1 14.07 13.14 13.56 *
94.6188 -44.9713 13.1 -1 USNO-B1 19.44 19.60 19.53
94.6193 -44.9740 3.6 -1 GSC2.3 13.09 13.97 99.99 *
94.6184 -44.9710 14.6 -1 GSC2.3 19.46 20.77 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
94.5337 -44.9975 7.4 -1 USNO-B1 21.03 19.77 20.33
94.5336 -44.9974 7.9 -1 GSC2.3 19.49 21.52 99.99
The closest star is 7.36" 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 18.12, XRT distances < 5.5",
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 1222955
------ Start for Possible Stand-alone Circular ----
In response to GRB240419 (Swift/BAT trigger 1222955) at 01:48:01 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
271 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 19.2 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 18.0 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.070.
------- notes for trigger 1222955 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 240419d08h17m45s085561usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1222955
-expid=735184385 -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/1222955/
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 735184385.9262 or about 2024:110:01:53:00 UT
Found 1007 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 9% of the srclist region. Found 144 sources in
srclist catalog. Found 30 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.12 mag.
Found 9 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 20.64 mag. Found 84 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 8% of the
Genie image region.
Genie image analysis:
Found 11960.7 counts in the large background region of 5922.0 pixels or a rate
of 2.020 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 19.89 mag. for a
4-arcsec aperture.
Found 380.8 counts in the XRT position region of 199.0 pixels or a rate of
1.914 counts/pixel in a radius of 8.0 arcsec. The net count rate (using large
background region) at the XRT position is -0.084 +/- 0.079 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.238 cps or 19.71 mag. The closest srclist
source has ra= 94.5294 dec= -44.9940 mag=19.23 sep=23.33". The closest Genie
source has ra= 94.5237 dec= -45.0042 mag=15.83 sep=31.39".
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?
735184385 270 U srclist found no candidates.
735184385 270 U image found no candidates.
List afterglow candidates for other finding charts.
735184227 112 WHITE srclist found no candidates.
735184227 112 WHITE image found no candidates.
735184989 874 WHITE srclist found no candidates.
735184989 874 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -44.99953
GRB_ERROR: 5.5
GRB_RA: 94.53404
IMAGE_START_TIME: 01:53:00
MAGNITUDE: 19.7
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT