srclist overlap message for exposure 2 of trigger 1056757
uvot_overlap.pl vrs. 2010-12-20b fem started at 210620d05h35m22s268776usUT
The observation of trigger 1056757 started 2021-06-20T00:05:40.5
Examining file ./1056757_g374_uvot_sky_srclist.fits
The exposure ID is 645840340
The exposure time is undefined.
The filter is U.
The uvot region is centered at (319.7164,33.8641) with a roll angle of 47.5
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 (319.7130,33.8600) with a radius of 3.000 arc min
This is 0.300 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 (319.7185,33.8500) with a radius of 0.035 arc min
This is 0.854 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 1056757
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210620d05h35m37s163409usUT
Observation start time is 2021-06-20T00:05:40.5
Examining file ./1056757_g374_uvot_catalog_srclist.fits
The exposure ID is 645840340
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 190 detected source(s) for 1056757_g374
*** 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 1056757_g374 has mag 18.21
Aspect correction adds 0.00097 degrees (0.232 sec of time = 2.89 arc sec) to RA
Aspect correction adds 0.00078 degrees ( 2.82 arcsec) to Dec
Total aspect correction is 4.04 arcsec
Star catalogs centered at 319.7119 , 33.8771 with radius 8.59 arc min.
n_usno: 2880 n_gsc: 0
*** WARNING -- bright star catalog has 17 entries brighter than 12 mag
The brightest has mag 9.33252
RA DEC Mag Color
bright star 0: 319.74187 (21:18:58.05) 33.85312 (+33:51:11.2) 11.54 USNO-V
bright star 1: 319.65546 (21:18:37.31) 33.86936 (+33:52:09.7) 11.53 USNO-V
bright star 2: 319.62810 (21:18:30.74) 33.89666 (+33:53:48.0) 11.41 USNO-V
bright star 3: 319.77170 (21:19:05.21) 33.93004 (+33:55:48.1) 11.67 USNO-V
bright star 4: 319.79445 (21:19:10.67) 33.83816 (+33:50:17.4) 9.33 USNO-V
bright star 5: 319.71086 (21:18:50.61) 33.79269 (+33:47:33.7) 11.63 USNO-V
bright star 6: 319.73752 (21:18:57.00) 33.79447 (+33:47:40.1) 11.94 USNO-V
bright star 7: 319.67864 (21:18:42.87) 33.79573 (+33:47:44.6) 10.21 USNO-V
bright star 8: 319.66626 (21:18:39.90) 33.79950 (+33:47:58.2) 10.73 USNO-V
bright star 9: 319.68261 (21:18:43.83) 33.79162 (+33:47:29.8) 11.76 USNO-V
bright star 10: 319.69545 (21:18:46.91) 33.96759 (+33:58:03.3) 11.86 USNO-V
bright star 11: 319.83328 (21:19:19.99) 33.87523 (+33:52:30.8) 11.73 USNO-V
bright star 12: 319.84445 (21:19:22.67) 33.86376 (+33:51:49.6) 10.82 USNO-V
bright star 13: 319.84539 (21:19:22.89) 33.84053 (+33:50:25.9) 11.12 USNO-V
bright star 14: 319.56615 (21:18:15.88) 33.89390 (+33:53:38.0) 11.99 USNO-V
bright star 15: 319.60994 (21:18:26.39) 33.76971 (+33:46:11.0) 11.60 USNO-V
bright star 16: 319.58660 (21:18:20.78) 33.97463 (+33:58:28.7) 11.97 USNO-V
Mean distance difference (CAT_DELTA) for 159 matched entries is 0.825" for 1056757_g374
Mean and std. dev of mag. difference (MAG_DELTA) are 1.925 and 0.821 for 1056757_g374
Found 36 entries without IDs and 4 entries that are acceptable afterglow candidates for 1056757_g374.
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.
26 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=319.7130 (21:18:51.12) DEC=33.8600 (+33:51:36.0)
XRT distances are from RA=319.7185 (21:18:52.44) DEC=33.8500 (+33:51:00.1)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1056757_g374 with 3x3 stamp
ra=319.71816 (21:18:52.36) dec=33.85037 (+33:51:01.3) +/- 1.1" mag=16.40+/-0.35
dist=1.6 REFID=31
src: 0 distr. of nearby unmatched sources: 0 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
319.7187 33.8552 17.5 -1 USNO-B1 19.28 17.44 18.26
319.7148 33.8531 14.0 -1 USNO-B1 20.18 18.59 19.30
319.7142 33.8529 15.0 -1 USNO-B1 20.23 18.66 19.36
319.7204 33.8538 14.2 -1 USNO-B1 18.73 17.34 17.96
319.7203 33.8533 12.4 -1 USNO-B1 20.42 17.73 18.93
319.7227 33.8466 19.2 -1 USNO-B1 17.77 16.45 17.04
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
-----------------
Entry 6 in the list of sources is a candidate afterglow for 1056757_g374 with 1x1 stamp
ra=319.71291 (21:18:51.10) dec=33.83694 (+33:50:13.0) +/- 1.1" mag=17.16+/-0.35
dist=50.0 REFID=133
*** The position of this source is inconsistent with the XRT position.
The position is 83.0 arc sec from the BAT position.
src: 6 distr. of nearby unmatched sources: 0 0 0 0 0
Found 1 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
319.7124 33.8378 3.3 -1 USNO-B1 12.59 12.00 12.26 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 14 in the list of sources is a candidate afterglow for 1056757_g374 with 1x1 stamp
ra=319.68567 (21:18:44.56) dec=33.84928 (+33:50:57.4) +/- 1.1" mag=17.96+/-0.35
dist=98.2 REFID=161
*** The position of this source is inconsistent with the XRT position.
The position is 90.4 arc sec from the BAT position.
src: 14 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
319.6869 33.8520 10.5 -1 USNO-B1 18.43 18.90 18.69
319.6855 33.8524 11.1 -1 USNO-B1 99.99 18.94 99.99
319.6850 33.8526 12.3 -1 USNO-B1 20.27 18.83 19.47
319.6857 33.8500 2.5 -1 USNO-B1 15.96 14.18 14.97 *
319.6847 33.8474 7.5 -1 USNO-B1 20.31 19.02 19.59
319.6830 33.8444 19.3 -1 USNO-B1 99.99 18.88 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 43 in the list of sources is a candidate afterglow for 1056757_g374 with 1x1 stamp
ra=319.75434 (21:19:01.04) dec=33.89532 (+33:53:43.2) +/- 1.1" mag=18.12+/-0.35
dist=195.1 REFID=148
*** The position of this source is inconsistent with the XRT position.
The position is 177.3 arc sec from the BAT position.
src: 43 distr. of nearby unmatched sources: 0 0 0 0 0
Found 9 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
319.7484 33.8931 19.6 -1 USNO-B1 18.52 17.09 17.72
319.7508 33.8923 15.2 -1 USNO-B1 17.88 16.48 17.10
319.7523 33.8916 14.6 -1 USNO-B1 20.40 99.99 99.99
319.7551 33.8900 19.4 -1 USNO-B1 20.27 17.91 18.96
319.7535 33.8953 2.5 -1 USNO-B1 16.30 14.46 15.28 *
319.7571 33.8923 13.6 -1 USNO-B1 19.67 18.52 19.03
319.7541 33.8978 9.0 -1 USNO-B1 19.23 17.84 18.46
319.7601 33.8944 17.5 -1 USNO-B1 20.35 18.97 19.58
319.7604 33.8947 18.4 -1 USNO-B1 18.69 17.16 17.84
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:
Unmatched source ra=319.71816 (21:18:52.36) dec=33.85037 (+33:51:01.3) +/- 1.1" mag=16.40+/-0.35 dist=1.6 REFID=31
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 < 5.25",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
srclist paragraph message for exposure 2 of trigger 1056757
------ Start for Possible Stand-alone Circular ----
In response to GRB210619 (Swift/BAT trigger 1056757) at 23:59:25 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
347 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 21:18:52.39 = 319.71831
DEC(J2000) = +33:51:01.5 = 33.85043
with a 90%-confidence error radius of about 0.61 arc sec. This position is 1.5
arc sec. from the center of the XRT error circle. The estimated magnitude is
15.54 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.173.
------- notes for trigger 1056757 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210620d05h35m41s804683usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1056757
-expid=645840340 -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/1056757/
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 645840340.51838 or about 2021:171:00:05:35 UT
Found 2876 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 27% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 36 srclist
source(s) without IDs. There are 1 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.12 mag.
Found 28 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 1 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.49 mag. Found 270 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 24% of the Genie image region.
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?
645840340 347 U 319.71816 33.85037 16.40/18.1 1.6 srclist Yes
645840340 347 U 319.71831 33.85043 15.54/20.5 1.5 image Yes
List afterglow candidates for other finding charts.
645840128 135 WHITE 319.71822 33.85037 14.96/19.2 1.5 srclist Yes
645840128 135 WHITE 319.71831 33.85044 14.71/20.7 1.6 image Yes
645840850 857 WHITE 319.71828 33.85057 17.46/19.2 0.6 srclist Yes
645840850 857 WHITE 319.71831 33.85048 16.72/20.7 0.6 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 33.85043
GRB_ERROR: 0.61
GRB_RA: 319.71831
IMAGE_START_TIME: 00:05:35
MAGNITUDE: 15.54
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT