srclist overlap message for exposure 3 of trigger 1015873
uvot_overlap.pl vrs. 2010-12-20b fem started at 210104d21h55m27s156205usUT
The observation of trigger 1015873 started 2021-01-04T11:41:46.0
Examining file ./1015873_g886_uvot_sky_srclist.fits
The exposure ID is 631453306
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (103.7651,64.6781) with a roll angle of 357.4
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 (103.7050,64.6610) with a radius of 3.000 arc min
This is 1.854 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 (103.7728,64.6761) with a radius of 0.023 arc min
This is 0.233 arc min from the center of the uvot region
The area of the XRT error circle is 0.002 sq. arc min
The UVOT/XRT overlap is 0.002 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 3 of trigger 1015873
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210104d21h55m49s126947usUT
Observation start time is 2021-01-04T11:41:46.0
Examining file ./1015873_g886_uvot_catalog_srclist.fits
The exposure ID is 631453306
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 1015873_g886
*** 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 1015873_g886 has mag 19.75
Aspect correction adds 0.00160 degrees (0.383 sec of time = 2.46 arc sec) to RA
Aspect correction adds 0.00053 degrees ( 1.90 arcsec) to Dec
Total aspect correction is 3.11 arcsec
Star catalogs centered at 103.7660 , 64.6745 with radius 8.68 arc min.
n_usno: 887 n_gsc: 0
*** WARNING -- bright star catalog has 8 entries brighter than 12 mag
The brightest has mag 10.8646
RA DEC Mag Color
bright star 0: 103.82948 (06:55:19.08) 64.71798 (+64:43:04.7) 11.42 USNO-V
bright star 1: 103.80077 (06:55:12.18) 64.62007 (+64:37:12.3) 10.96 USNO-V
bright star 2: 103.82969 (06:55:19.13) 64.73356 (+64:44:00.8) 11.44 USNO-V
bright star 3: 103.61437 (06:54:27.45) 64.65760 (+64:39:27.4) 11.99 USNO-V
bright star 4: 103.50235 (06:54:00.56) 64.65727 (+64:39:26.2) 10.86 USNO-V
bright star 5: 104.03488 (06:56:08.37) 64.68090 (+64:40:51.2) 10.87 USNO-V
bright star 6: 103.47971 (06:53:55.13) 64.64333 (+64:38:36.0) 11.04 USNO-V
bright star 7: 103.44934 (06:53:47.84) 64.63254 (+64:37:57.1) 11.28 USNO-V
Mean distance difference (CAT_DELTA) for 123 matched entries is 0.841" for 1015873_g886
Mean and std. dev of mag. difference (MAG_DELTA) are 1.661 and 0.901 for 1015873_g886
Found 70 entries without IDs and 5 entries that are acceptable afterglow candidates for 1015873_g886.
Acceptable entries have no ID, XRT distances < 5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
57 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=103.7050 (06:54:49.20) DEC=64.6610 (+64:39:39.6)
XRT distances are from RA=103.7728 (06:55:05.47) DEC=64.6761 (+64:40:33.8)
*** WARNING 36 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1015873_g886 with 3x3 stamp
ra=103.77146 (06:55:05.15) dec=64.67600 (+64:40:33.6) +/- 1.1" mag=17.82+/-0.35
dist=2.1 REFID=38
src: 0 distr. of nearby unmatched sources: 0 0 0 0 1
Found 3 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
103.7592 64.6744 19.8 -1 USNO-B1 20.73 20.29 20.49
103.7782 64.6724 16.7 -1 USNO-B1 20.94 99.99 99.99
103.7792 64.6718 19.4 -1 USNO-B1 20.90 19.63 20.19
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
-----------------
Entry 3 in the list of sources is a candidate afterglow for 1015873_g886 with 1x1 stamp
ra=103.77372 (06:55:05.69) dec=64.68171 (+64:40:54.1) +/- 1.1" mag=19.43+/-0.35
dist=20.4 REFID=162
*** The position of this source is inconsistent with the XRT position.
The position is 129.5 arc sec from the BAT position.
src: 3 distr. of nearby unmatched sources: 0 0 0 0 3
Found 2 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
103.7753 64.6823 3.3 -1 USNO-B1 20.90 19.50 20.12 *
103.7810 64.6812 11.3 -1 USNO-B1 12.73 12.03 12.34 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 4 in the list of sources is a candidate afterglow for 1015873_g886 with 1x1 stamp
ra=103.78629 (06:55:08.71) dec=64.67918 (+64:40:45.1) +/- 1.1" mag=19.43+/-0.35
dist=23.6 REFID=155
*** The position of this source is inconsistent with the XRT position.
The position is 141.3 arc sec from the BAT position.
src: 4 distr. of nearby unmatched sources: 0 0 1 0 1
Found 2 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
103.7846 64.6768 8.9 -1 USNO-B1 16.30 15.20 15.69
103.7810 64.6812 11.0 -1 USNO-B1 12.73 12.03 12.34 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 7 in the list of sources is a candidate afterglow for 1015873_g886 with 1x1 stamp
ra=103.78689 (06:55:08.85) dec=64.68271 (+64:40:57.8) +/- 1.1" mag=19.60+/-0.35
dist=32.3 REFID=116
*** The position of this source is inconsistent with the XRT position.
The position is 148.4 arc sec from the BAT position.
src: 7 distr. of nearby unmatched sources: 0 0 1 0 2
Found 3 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
103.7753 64.6823 17.9 -1 USNO-B1 20.90 19.50 20.12
103.7810 64.6812 10.5 -1 USNO-B1 12.73 12.03 12.34 *
103.7981 64.6824 17.3 -1 USNO-B1 22.04 20.61 21.24
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 9 in the list of sources is a candidate afterglow for 1015873_g886 with 1x1 stamp
ra=103.80011 (06:55:12.03) dec=64.68442 (+64:41:03.9) +/- 1.1" mag=19.21+/-0.35
dist=51.7 REFID=158
*** The position of this source is inconsistent with the XRT position.
The position is 169.0 arc sec from the BAT position.
src: 9 distr. of nearby unmatched sources: 0 0 0 0 1
Found 2 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
103.7981 64.6824 7.9 -1 USNO-B1 22.04 20.61 21.24
103.7987 64.6852 3.7 -1 USNO-B1 15.73 14.41 15.00 *
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=103.77146 (06:55:05.15) dec=64.67600 (+64:40:33.6) +/- 1.1" mag=17.82+/-0.35 dist=2.1 REFID=38
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 < 5",
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 3 of trigger 1015873
------ Start for Possible Stand-alone Circular ----
In response to GRB210104 (Swift/BAT trigger 1015873) at 11:26:59 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 860 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 06:55:05.26 = 103.77190
DEC(J2000) = +64:40:34.6 = 64.67629
with a 90%-confidence error radius of about 0.61 arc sec. This position is 1.6
arc sec. from the center of the XRT error circle. The estimated magnitude is
16.47 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.04.
------- notes for trigger 1015873 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210104d21h55m54s117980usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1015873
-expid=631453306 -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/1015873/
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 631453306.04388 or about 2021:004:11:41:41 UT
Found 883 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 8% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 70 srclist
source(s) without IDs. There are 1 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 19.22 mag.
Found 12 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 2 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.75 mag. Found 85 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 8% 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?
631453306 860 WHITE 103.77146 64.67600 17.82/19.2 2.1 srclist Yes
631453306 860 WHITE 103.77190 64.67629 16.47/20.8 1.6 image Yes
List afterglow candidates for other finding charts.
631452516 70 WHITE 103.77188 64.67611 15.52/19.2 1.4 srclist Yes
631452516 70 WHITE 103.77189 64.67627 14.60/20.7 1.6 image Yes
631452728 282 U 103.77182 64.67635 16.13/18.1 1.8 srclist Yes
631452728 282 U 103.77190 64.67621 15.19/20.5 1.5 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 64.67629
GRB_ERROR: 0.61
GRB_RA: 103.77190
IMAGE_START_TIME: 11:41:41
MAGNITUDE: 16.47
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT