image overlap message for exposure 2 of trigger 885960
uvot_overlap.pl vrs. 2010-12-20b fem started at 190127d01h08m46s489120usUT
The observation of trigger 885960 started 2019-01-27T01:02:28.1
Examining file 885960_g378_uvot_sky_image.fits
The exposure ID is 570243748
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (207.0597,-63.2737) 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 0.748 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 0.107 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 2 of trigger 885960
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190127d01h08m47s501520usUT
Observation start time is 2019-01-27T01:02:28.1
Examining file 885960_g378_uvot_catalog_image.fits
The exposure ID is 570243748
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 29 detected source(s) for 885960_g378
Aspect correction adds -0.00338 degrees (-0.812 sec of time = -5.48 arc sec) to RA
Aspect correction adds -0.00114 degrees (-4.10 arcsec) to Dec
Total aspect correction is 6.85 arcsec
Star catalogs centered at 207.0612 , -63.2766 with radius 2.73 arc min.
n_usno: 621 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 27 matched entries is 0.747" for 885960_g378
Mean and std. dev of mag. difference (MAG_DELTA) are 1.619 and 1.858 for 885960_g378
Found 4 entries without IDs and 4 entries that are acceptable afterglow candidates for 885960_g378.
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.
0 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_g378 with genie
ra=207.05344 (13:48:12.83) dec=-63.27456 (-63:16:28.4) +/- 0.6" mag=17.02+/-0.15
dist=5.9 REFID=16 major=1.0 minor=1.0 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 11.1 -1 USNO-B1 19.00 20.94 20.08
207.0586 -63.2775 13.5 -1 USNO-B1 17.46 16.49 16.92
207.0521 -63.2788 15.4 -1 USNO-B1 18.96 17.16 17.96
207.0526 -63.2704 14.9 -1 USNO-B1 18.38 18.28 18.32
207.0434 -63.2759 17.0 -1 USNO-B1 16.58 15.38 15.92
207.0426 -63.2762 18.5 -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 13 of 13 good pixels
##### This source remains a candidate #####
It has no entries within 3.5" or brighter than 12 mag
-----------------
Entry 5 in the list of sources is a candidate afterglow for 885960_g378 with genie
ra=207.03929 (13:48:09.43) dec=-63.28033 (-63:16:49.2) +/- 0.6" mag=16.76+/-0.14
dist=36.8 REFID=21 major=1.1 minor=1.1 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 44.9 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
207.0515 -63.2808 19.8 -1 USNO-B1 16.36 14.79 15.49
207.0434 -63.2759 17.2 -1 USNO-B1 16.58 15.38 15.92
207.0426 -63.2762 15.8 -1 USNO-B1 99.99 16.62 99.99
207.0387 -63.2809 2.3 -1 USNO-B1 15.27 13.70 14.40 *
207.0349 -63.2771 13.6 -1 USNO-B1 19.23 17.21 18.11
207.0340 -63.2797 8.9 -1 USNO-B1 99.99 18.59 99.99
207.0330 -63.2770 15.8 -1 USNO-B1 99.99 17.27 99.99
207.0339 -63.2852 19.7 -1 USNO-B1 16.48 14.90 15.60
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 7 in the list of sources is a candidate afterglow for 885960_g378 with genie
ra=207.03772 (13:48:09.05) dec=-63.28139 (-63:16:53.0) +/- 0.6" mag=16.81+/-0.14
dist=41.3 REFID=22 major=1.3 minor=1.2 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 48.4 arc sec from the BAT position.
Found 5 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
207.0387 -63.2809 2.3 -1 USNO-B1 15.27 13.70 14.40 *
207.0349 -63.2771 16.0 -1 USNO-B1 19.23 17.21 18.11
207.0340 -63.2797 8.5 -1 USNO-B1 99.99 18.59 99.99
207.0330 -63.2770 17.7 -1 USNO-B1 99.99 17.27 99.99
207.0339 -63.2852 15.2 -1 USNO-B1 16.48 14.90 15.60
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 26 in the list of sources is a candidate afterglow for 885960_g378 with genie
ra=207.04114 (13:48:09.87) dec=-63.29743 (-63:17:50.7) +/- 0.7" mag=18.76+/-0.18
dist=90.0 REFID=29 major=0.6 minor=0.3 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 106.4 arc sec from the BAT position.
This source is near the edge of image (1.025)
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
207.0443 -63.2925 18.4 -1 USNO-B1 18.56 17.07 17.73
207.0363 -63.2940 14.7 -1 USNO-B1 17.71 17.07 17.35
207.0455 -63.2971 7.1 -1 USNO-B1 18.13 16.84 17.41
207.0402 -63.2978 2.0 -1 USNO-B1 16.21 14.50 15.26 *
207.0465 -63.2992 10.8 -1 USNO-B1 19.12 17.68 18.32
207.0407 -63.2983 3.1 -1 USNO-B1 19.86 14.63 16.95 *
207.0414 -63.2990 5.8 -1 USNO-B1 18.17 16.26 17.11
207.0331 -63.2981 13.3 -1 USNO-B1 21.05 18.74 19.77
207.0330 -63.2984 13.6 -1 USNO-B1 18.84 17.11 17.88
207.0331 -63.2986 13.7 -1 USNO-B1 17.35 17.19 17.26
207.0396 -63.3014 14.5 -1 USNO-B1 18.94 16.34 17.50
207.0347 -63.3019 19.1 -1 USNO-B1 21.05 18.87 19.84
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" 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=207.05344 (13:48:12.83) dec=-63.27456 (-63:16:28.4) +/- 0.6" mag=17.02+/-0.15 dist=5.9 REFID=16 flag=0
There are 25855.908 counts in the bkg source region of 5486.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 4.713 counts/pixel (5-sig UL in 4" is 19.62 mag) for 885960_g378
There are 881.64026 counts in the src source region of 50.000000 pixels.
Rate in src region with 4 arcsec radius is 17.633 counts/pixel for 885960_g378
There are 5503.9277 counts in the cand_src_bkg source region of 1169.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 4.708 counts/pixel (5-sig UL in 4" is 19.62 mag) for 885960_g378
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 20.18, 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_570243748_190127d01h08m47s501520usUT_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(207.0597,-63.2737,45")
fk5;-circle(207.053440400417,-63.2745567555898,6")
fk5;-circle(207.071977289059,-63.275136491118,6")
fk5;-circle(207.051572294863,-63.2809052289277,6")
fk5;-circle(207.068595072955,-63.2806749760759,6")
fk5;-circle(207.075818947003,-63.2777448684861,6")
fk5;-circle(207.039286443166,-63.2803342520953,6")
fk5;-circle(207.074588674663,-63.2655397288307,6")
fk5;-circle(207.037720829381,-63.2813904393208,6")
fk5;-circle(207.066074391275,-63.2613892529594,6")
Region file: 885960_570243748_190127d01h08m47s501520usUT_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(207.053440400417,-63.2745567555898,4")
Region file: 885960_570243748_190127d01h08m47s501520usUT_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(207.053440400417,-63.2745567555898,25")
fk5;-circle(207.053440400417,-63.2745567555898,15")
fk5;-circle(207.071977289059,-63.275136491118,6")
fk5;-circle(207.051572294863,-63.2809052289277,6")
fk5;-circle(207.039286443166,-63.2803342520953,6")
image paragraph message for exposure 2 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 250 seconds with the U filter starting
356 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 13:48:12.83 = 207.05344
DEC(J2000) = -63:16:28.4 = -63.27456
with a 90%-confidence error radius of about 0.62 arc sec. This position is 5.9
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.02 with a 1-sigma error of about 0.15. 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 190127d01h08m49s035857usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=885960
-expid=570243748 -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 Genie image. BAT position found.
UVOT exposure began at MET 570243748.10822 or about 2019:027:01:02:23 UT
No information found about the number of stars in the star catalog for srclist
region.
Found 29 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 4 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.18 mag. Found 617 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 57% 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?
570243748 356 U srclist data are not available.
570243748 356 U 207.05344 -63.27456 17.02/20.2 5.9 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
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -63.27456
GRB_ERROR: 0.62
GRB_RA: 207.05344
IMAGE_START_TIME: 01:02:23
MAGNITUDE: 17.02
MAG_ERROR: 0.15
MESSAGE_TYPE: ACK
SOURCE: XRT