image overlap message for exposure 1 of trigger 953689
uvot_overlap.pl vrs. 2010-12-20b fem started at 200201d04h04m28s993208usUT
The observation of trigger 953689 started 2020-01-31T22:42:57.8
Examining file ./953689_g101_uvot_sky_image.fits
The exposure ID is 602203377
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (3.0873,51.1132) with a roll angle of 227.0
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 (3.0950,51.1240) with a radius of 3.000 arc min
This is 0.709 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 (3.0944,51.1168) with a radius of 0.025 arc min
This is 0.343 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
image afterglow message for exposure 1 of trigger 953689
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200201d04h04m34s567753usUT
Observation start time is 2020-01-31T22:42:57.8
Examining file ./953689_g101_uvot_catalog_image.fits
The exposure ID is 602203377
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 22 detected source(s) for 953689_g101
Aspect correction adds -0.00026 degrees (-0.062 sec of time = -0.59 arc sec) to RA
Aspect correction adds 0.00022 degrees ( 0.77 arcsec) to Dec
Total aspect correction is 0.97 arcsec
Star catalogs centered at 3.0881 , 51.1134 with radius 2.70 arc min.
n_usno: 214 n_gsc: 0
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 11.07198
RA DEC Mag Color
bright star 0: 3.08962 (00:12:21.51) 51.08237 (+51:04:56.5) 11.07 USNO-V
bright star 1: 3.02182 (00:12:05.24) 51.11903 (+51:07:08.5) 11.39 USNO-V
Mean distance difference (CAT_DELTA) for 21 matched entries is 0.522" for 953689_g101
Mean and std. dev of mag. difference (MAG_DELTA) are 0.928 and 0.680 for 953689_g101
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 953689_g101.
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.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA= 3.0950 (00:12:22.80) DEC=51.1240 (+51:07:26.4)
XRT distances are from RA= 3.0944 (00:12:22.65) DEC=51.1168 (+51:07:00.4)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 953689_g101 with genie
ra=3.09403 (00:12:22.57) dec=51.11678 (+51:07:00.4) +/- 0.6" mag=15.44+/-0.14
dist=0.8 REFID=12 major=1.0 minor=0.9 flag=0
Found 2 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
3.0865 51.1174 17.2 -1 USNO-B1 20.59 19.11 19.76
3.0921 51.1212 16.6 -1 USNO-B1 20.57 19.59 20.03
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
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=3.09403 (00:12:22.57) dec=51.11678 (+51:07:00.4) +/- 0.6" mag=15.44+/-0.14 dist=0.8 REFID=12 flag=0
There are 62368.359 counts in the bkg source region of 5704.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 10.934 counts/pixel (5-sig UL in 4" is 20.05 mag) for 953689_g101
There are 7104.9199 counts in the src source region of 52.000000 pixels.
Rate in src region with 4 arcsec radius is 136.633 counts/pixel for 953689_g101
There are 13605.583 counts in the cand_src_bkg source region of 1219.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 11.161 counts/pixel (5-sig UL in 4" is 20.04 mag) for 953689_g101
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 20.61, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
Region file: 953689_602203377_200201d04h04m34s567753usUT_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(3.0873,51.1132,45")
fk5;-circle(3.0940299122783,51.1167833282185,6")
fk5;-circle(3.0921192125556,51.1092909694374,6")
fk5;-circle(3.10694721686055,51.1149452764924,6")
fk5;-circle(3.07707000053668,51.119137246019,6")
fk5;-circle(3.07963894986374,51.1240353099925,6")
fk5;-circle(3.08275312395978,51.1050232382218,6")
fk5;-circle(3.06878000221372,51.106843381234,6")
Region file: 953689_602203377_200201d04h04m34s567753usUT_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(3.0940299122783,51.1167833282185,4")
Region file: 953689_602203377_200201d04h04m34s567753usUT_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(3.0940299122783,51.1167833282185,25")
fk5;-circle(3.0940299122783,51.1167833282185,15")
fk5;-circle(3.0921192125556,51.1092909694374,6")
fk5;-circle(3.10694721686055,51.1149452764924,6")
image paragraph message for exposure 1 of trigger 953689
------ Start for Possible Stand-alone Circular ----
In response to GRB200131 (Swift/BAT trigger 953689) at 22:41:15 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 77 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 00:12:22.57 = 3.09403
DEC(J2000) = +51:07:00.4 = 51.11678
with a 90%-confidence error radius of about 0.61 arc sec. This position is 0.8
arc sec. from the center of the XRT error circle. The estimated magnitude is
15.44 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.17.
------- notes for trigger 953689 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200201d04h04m38s813096usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=953689
-expid=602203377 -meonly -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/953689/
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 602203377.83742 or about 2020:031:22:42:52 UT
Found 1058 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 20% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 47 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 22 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
20.61 mag. Found 210 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 20% 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?
602203377 76 WHITE 3.09412 51.11677 16.39/19.2 0.6 srclist Yes
602203377 76 WHITE 3.09403 51.11678 15.44/20.6 0.8 image Yes
List afterglow candidates for other finding charts.
602203590 289 U 3.09427 51.11673 *16.6/18.1 3.4 srclist Yes
602203590 289 U 3.09404 51.11655 16.08/19.3 2.7 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 51.11678
GRB_ERROR: 0.61
GRB_RA: 3.09403
IMAGE_START_TIME: 22:42:52
MAGNITUDE: 15.44
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT