image overlap message for exposure 3 of trigger 885960
uvot_overlap.pl vrs. 2010-12-20b fem started at 190127d01h16m53s183735usUT
The observation of trigger 885960 started 2019-01-27T01:10:57.6
Examining file 885960_g887_uvot_sky_image.fits
The exposure ID is 570244257
The exposure time is 149.846 (seconds)
The filter is WHITE.
The uvot region is centered at (207.0606,-63.2744) with a roll angle of 109.1
It is square with sides of 2.68 arc min. for an area of 7.17 sq arc min
The BAT error circle is centered at (207.0350,-63.2680) with a radius of 3.000 arc min
This is 0.789 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 7.17 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (207.0558,-63.2733) with a radius of 0.078 arc min
This is 0.144 arc min from the center of the uvot region
The area of the XRT error circle is 0.019 sq. arc min
The UVOT/XRT overlap is 0.019 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 3 of trigger 885960
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190127d01h16m54s235946usUT
Observation start time is 2019-01-27T01:10:57.6
Examining file 885960_g887_uvot_catalog_image.fits
The exposure ID is 570244257
The exposure is 149.846 sec.
The bin size is 2 pixels
The filter is WHITE
There are 57 detected source(s) for 885960_g887
Aspect correction adds -0.00458 degrees (-1.098 sec of time = -7.41 arc sec) to RA
Aspect correction adds -0.00132 degrees (-4.74 arcsec) to Dec
Total aspect correction is 8.80 arcsec
Star catalogs centered at 207.0613 , -63.2767 with radius 2.73 arc min.
n_usno: 617 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.74366
RA DEC Mag Color
bright star 0: 207.10769 (13:48:25.84) -63.26928 (-63:16:09.4) 11.74 USNO-V
Mean distance difference (CAT_DELTA) for 59 matched entries is 0.649" for 885960_g887
Mean and std. dev of mag. difference (MAG_DELTA) are 1.477 and 1.137 for 885960_g887
Found 5 entries without IDs and 4 entries that are acceptable afterglow candidates for 885960_g887.
Acceptable entries have no ID, XRT distances < 11.75", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
1 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=207.0350 (13:48:08.40) DEC=-63.2680 (-63:16:04.8)
XRT distances are from RA=207.0558 (13:48:13.39) DEC=-63.2733 (-63:16:23.9)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 885960_g887 with genie
ra=207.05341 (13:48:12.82) dec=-63.27461 (-63:16:28.6) +/- 0.6" mag=16.91+/-0.14
dist=6.1 REFID=31 major=1.0 minor=0.9 flag=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
207.0601 -63.2753 11.2 -1 USNO-B1 19.00 20.94 20.08
207.0586 -63.2775 13.4 -1 USNO-B1 17.46 16.49 16.92
207.0521 -63.2788 15.2 -1 USNO-B1 18.96 17.16 17.96
207.0526 -63.2704 15.1 -1 USNO-B1 18.38 18.28 18.32
207.0434 -63.2759 16.9 -1 USNO-B1 16.58 15.38 15.92
207.0426 -63.2762 18.4 -1 USNO-B1 99.99 16.62 99.99
207.0458 -63.2713 17.1 -1 USNO-B1 20.21 18.51 19.26
207.0445 -63.2719 17.3 -1 USNO-B1 99.99 18.24 99.99
uvot_check_outside found 12 of 12 good pixels
##### This source remains a candidate #####
It has no entries within 3.5" or brighter than 12 mag
-----------------
Entry 10 in the list of sources is a candidate afterglow for 885960_g887 with genie
ra=207.03591 (13:48:08.62) dec=-63.27720 (-63:16:37.9) +/- 0.7" mag=19.92+/-0.20
dist=35.1 REFID=38 major=0.9 minor=0.9 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 33.2 arc sec from the BAT position.
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
207.0434 -63.2759 12.9 -1 USNO-B1 16.58 15.38 15.92
207.0426 -63.2762 11.5 -1 USNO-B1 99.99 16.62 99.99
207.0387 -63.2809 14.2 -1 USNO-B1 15.27 13.70 14.40
207.0349 -63.2771 1.7 -1 USNO-B1 19.23 17.21 18.11 *
207.0340 -63.2797 9.6 -1 USNO-B1 99.99 18.59 99.99
207.0330 -63.2770 4.8 -1 USNO-B1 99.99 17.27 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 12 in the list of sources is a candidate afterglow for 885960_g887 with genie
ra=207.04210 (13:48:10.10) dec=-63.26425 (-63:15:51.3) +/- 0.8" mag=19.94+/-0.20
dist=39.4 REFID=15 major=0.9 minor=0.9 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 17.7 arc sec from the BAT position.
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
207.0492 -63.2682 18.3 -1 USNO-B1 21.09 19.09 19.98
207.0531 -63.2648 17.9 -1 USNO-B1 20.41 17.71 18.91
207.0487 -63.2629 11.7 -1 USNO-B1 19.29 16.00 17.46
207.0420 -63.2638 1.5 -1 USNO-B1 19.70 16.81 18.09 *
207.0507 -63.2611 17.9 -1 USNO-B1 15.86 18.32 17.23
207.0405 -63.2626 6.6 -1 USNO-B1 99.99 16.33 99.99
207.0394 -63.2623 8.3 -1 USNO-B1 17.96 17.35 17.62
207.0358 -63.2622 12.5 -1 USNO-B1 20.62 18.17 19.26
207.0392 -63.2610 12.6 -1 USNO-B1 18.37 18.75 18.58
207.0333 -63.2618 16.8 -1 USNO-B1 20.13 16.72 18.23
207.0328 -63.2618 17.5 -1 USNO-B1 18.28 16.77 17.44
207.0404 -63.2591 18.7 -1 USNO-B1 14.77 14.21 14.46
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 40 in the list of sources is a candidate afterglow for 885960_g887 with genie
ra=207.09854 (13:48:23.65) dec=-63.27855 (-63:16:42.8) +/- 0.7" mag=19.01+/-0.16
dist=71.7 REFID=40 major=1.3 minor=1.0 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 109.7 arc sec from the BAT position.
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
207.0927 -63.2801 11.0 -1 USNO-B1 99.99 16.95 99.99
207.0921 -63.2818 15.8 -1 USNO-B1 19.10 19.06 19.08
207.0978 -63.2739 16.8 -1 USNO-B1 16.24 13.88 14.93
207.0994 -63.2783 1.6 -1 USNO-B1 18.44 16.32 17.26 *
207.1041 -63.2796 9.8 -1 USNO-B1 20.13 15.52 17.57
207.1049 -63.2791 10.6 -1 USNO-B1 17.74 15.31 16.39
207.1042 -63.2822 15.8 -1 USNO-B1 18.20 16.39 17.19
207.1056 -63.2822 17.5 -1 USNO-B1 18.23 16.28 17.15
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 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=207.05341 (13:48:12.82) dec=-63.27461 (-63:16:28.6) +/- 0.6" mag=16.91+/-0.14 dist=6.1 REFID=31 flag=0
There are 77302.023 counts in the bkg source region of 4571.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 16.911 counts/pixel (5-sig UL in 4" is 19.81 mag) for 885960_g887
There are 2923.0107 counts in the src source region of 49.000000 pixels.
Rate in src region with 4 arcsec radius is 59.653 counts/pixel for 885960_g887
There are 15225.295 counts in the cand_src_bkg source region of 901.00000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 16.898 counts/pixel (5-sig UL in 4" is 19.81 mag) for 885960_g887
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 20.37, XRT distances < 11.75",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
Region file: 885960_570244257_190127d01h16m54s235946usUT_bkg.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(207.0606,-63.2744,45")
fk5;-circle(207.053405249143,-63.2746083333368,6")
fk5;-circle(207.06612639239,-63.274335644568,6")
fk5;-circle(207.058609197484,-63.2776170828825,6")
fk5;-circle(207.052082577594,-63.278688938617,6")
fk5;-circle(207.043299580195,-63.2756276771864,6")
fk5;-circle(207.072095610856,-63.2751529818216,6")
fk5;-circle(207.071678978087,-63.269713599602,6")
fk5;-circle(207.051637025408,-63.2808997103471,6")
fk5;-circle(207.068642712079,-63.2806614458396,6")
fk5;-circle(207.035912835179,-63.2772041957442,6")
fk5;-circle(207.075834560875,-63.2777522630705,6")
fk5;-circle(207.042103023543,-63.2642502739691,6")
fk5;-circle(207.03874736925,-63.280792468478,6")
fk5;-circle(207.074697611187,-63.2655492802197,6")
fk5;-circle(207.081766332222,-63.2756211262926,6")
fk5;-circle(207.066279408668,-63.2612797261654,6")
fk5;-circle(207.082126331657,-63.2677980803969,6")
fk5;-circle(207.0815298745,-63.26479974358,6")
fk5;-circle(207.087525014821,-63.2723358241972,6")
fk5;-circle(207.074267399837,-63.2856440342535,6")
Region file: 885960_570244257_190127d01h16m54s235946usUT_cand_src.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(207.053405249143,-63.2746083333368,4")
Region file: 885960_570244257_190127d01h16m54s235946usUT_cand_bkg.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(207.053405249143,-63.2746083333368,25")
fk5;-circle(207.053405249143,-63.2746083333368,15")
fk5;-circle(207.06612639239,-63.274335644568,6")
fk5;-circle(207.058609197484,-63.2776170828825,6")
fk5;-circle(207.052082577594,-63.278688938617,6")
fk5;-circle(207.043299580195,-63.2756276771864,6")
fk5;-circle(207.072095610856,-63.2751529818216,6")
fk5;-circle(207.051637025408,-63.2808997103471,6")
fk5;-circle(207.035912835179,-63.2772041957442,6")
image paragraph message for exposure 3 of trigger 885960
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB190127 (Swift/BAT trigger 885960) at 00:56:09 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 865 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 13:48:12.82 = 207.05341
DEC(J2000) = -63:16:28.6 = -63.27461
with a 90%-confidence error radius of about 0.61 arc sec. This position is 6.1
arc sec. from the center of the XRT error circle. The estimated magnitude is
16.91 with a 1-sigma error of about 0.14. No correction has been made for the
large, but uncertain, extinction expected.
------- notes for trigger 885960 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190127d01h16m55s847285usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=885960
-expid=570244257 -msg_image
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/885960/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for bat position. Unreliable extinction found for
xrt position. XRT position found for srclist. XRT position found for Genie
image. BAT position found.
UVOT exposure began at MET 570244257.63046 or about 2019:027:01:10:52 UT
Found 4722 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 57% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. 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 57 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 5 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.37 mag. Found 613 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 57% of the Genie image region. The
closest srclist source has ra= 207.0806 dec= -63.2565 mag=16.38 sep=72.73".
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?
570244257 865 WHITE srclist found no candidates.
570244257 865 WHITE 207.05341 -63.27461 16.91/20.4 6.1 image Yes
List afterglow candidates for other finding charts.
570243589 197 WHITE 207.05323 -63.27491 17.96/19.2 7.1 srclist Yes
570243589 197 WHITE 207.05348 -63.27458 16.99/20.4 5.9 image Yes
570243748 356 U 207.05305 -63.27465 17.73/18.1 6.6 srclist Yes
570243748 356 U 207.05344 -63.27456 17.02/20.2 5.9 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -63.27461
GRB_ERROR: 0.61
GRB_RA: 207.05341
IMAGE_START_TIME: 01:10:52
MAGNITUDE: 16.91
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT