image overlap message for exposure 1 of trigger 885807
uvot_overlap.pl vrs. 2010-12-20b fem started at 190126d11h17m54s400965usUT
The observation of trigger 885807 started 2019-01-26T11:13:54.4
Examining file 885807_g2160_uvot_sky_image.fits
The exposure ID is 570194034
The exposure time is 12.431 (seconds)
The filter is WHITE.
The uvot region is centered at (207.0089,-63.2680) with a roll angle of 108.7
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 (207.0030,-63.2650) with a radius of 3.000 arc min
This is 0.242 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 (207.0475,-63.2529) with a radius of 0.100 arc min
This is 1.380 arc min from the center of the uvot region
The area of the XRT error circle is 0.031 sq. arc min
The UVOT/XRT overlap is 0.008 sq. arc min or 0.24 of the XRT error circle
image afterglow message for exposure 1 of trigger 885807
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190126d11h17m56s476521usUT
Observation start time is 2019-01-26T11:13:54.4
Examining file 885807_g2160_uvot_catalog_image.fits
The exposure ID is 570194034
The exposure is 12.431 sec.
The bin size is 2 pixels
The filter is WHITE
There are 25 detected source(s) for 885807_g2160
Aspect correction adds -0.00327 degrees (-0.785 sec of time = -5.29 arc sec) to RA
Aspect correction adds -0.00195 degrees (-7.01 arcsec) to Dec
Total aspect correction is 8.78 arcsec
Star catalogs centered at 207.0206 , -63.2642 with radius 3.23 arc min.
n_usno: 969 n_gsc: 0
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 10.77
RA DEC Mag Color
bright star 0: 207.10769 (13:48:25.84) -63.26928 (-63:16:09.4) 11.74 USNO-V
bright star 1: 206.93171 (13:47:43.61) -63.23659 (-63:14:11.7) 10.77 USNO-R
Mean distance difference (CAT_DELTA) for 23 matched entries is 0.765" for 885807_g2160
Mean and std. dev of mag. difference (MAG_DELTA) are 1.210 and 0.619 for 885807_g2160
Found 4 entries without IDs and 4 entries that are acceptable afterglow candidates for 885807_g2160.
Acceptable entries have no ID, XRT distances < 15", 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=207.0030 (13:48:00.72) DEC=-63.2650 (-63:15:54.0)
XRT distances are from RA=207.0475 (13:48:11.40) DEC=-63.2529 (-63:15:10.4)
-----------------
Entry 5 in the list of sources is a candidate afterglow for 885807_g2160 with genie
ra=207.05349 (13:48:12.84) dec=-63.27449 (-63:16:28.2) +/- 0.7" mag=17.20+/-0.18
dist=78.3 REFID=18 major=0.9 minor=0.8 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 88.6 arc sec from the BAT position.
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
207.0445 -63.2719 17.2 -1 USNO-B1 99.99 18.24 99.99
207.0458 -63.2713 17.0 -1 USNO-B1 20.21 18.51 19.26
207.0434 -63.2759 17.2 -1 USNO-B1 16.58 15.38 15.92
207.0426 -63.2762 18.6 -1 USNO-B1 99.99 16.62 99.99
207.0526 -63.2704 14.7 -1 USNO-B1 18.38 18.28 18.32
207.0521 -63.2788 15.6 -1 USNO-B1 18.96 17.16 17.96
207.0601 -63.2753 11.1 -1 USNO-B1 19.00 20.94 20.08
207.0586 -63.2775 13.6 -1 USNO-B1 17.46 16.49 16.92
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 6 in the list of sources is a candidate afterglow for 885807_g2160 with genie
ra=207.03925 (13:48:09.42) dec=-63.28030 (-63:16:49.1) +/- 0.7" mag=16.64+/-0.16
dist=99.5 REFID=21 major=0.9 minor=0.8 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 80.5 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
207.0330 -63.2770 15.7 -1 USNO-B1 99.99 17.27 99.99
207.0349 -63.2771 13.4 -1 USNO-B1 19.23 17.21 18.11
207.0434 -63.2759 17.1 -1 USNO-B1 16.58 15.38 15.92
207.0426 -63.2762 15.7 -1 USNO-B1 99.99 16.62 99.99
207.0340 -63.2797 8.8 -1 USNO-B1 99.99 18.59 99.99
207.0387 -63.2809 2.4 -1 USNO-B1 15.27 13.70 14.40 *
207.0515 -63.2808 19.9 -1 USNO-B1 16.36 14.79 15.49
207.0339 -63.2852 19.8 -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 19 in the list of sources is a candidate afterglow for 885807_g2160 with genie
ra=206.96974 (13:47:52.74) dec=-63.27385 (-63:16:25.8) +/- 0.7" mag=16.57+/-0.16
dist=146.7 REFID=16 major=1.1 minor=0.8 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 62.6 arc sec from the BAT position.
Found 17 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
206.9772 -63.2699 18.7 -1 USNO-B1 21.04 16.85 18.71
206.9769 -63.2706 16.4 -1 USNO-B1 99.99 17.16 99.99
206.9762 -63.2711 14.5 -1 USNO-B1 99.99 16.48 99.99
206.9753 -63.2706 14.7 -1 USNO-B1 99.99 16.62 99.99
206.9773 -63.2732 12.6 -1 USNO-B1 99.99 14.18 99.99
206.9768 -63.2732 11.6 -1 USNO-B1 15.50 13.80 14.55
206.9735 -63.2713 11.0 -1 USNO-B1 18.33 16.57 17.35
206.9696 -63.2685 19.4 -1 USNO-B1 99.99 16.70 99.99
206.9725 -63.2737 4.6 -1 USNO-B1 99.99 13.22 99.99
206.9691 -63.2699 14.2 -1 USNO-B1 20.76 20.02 20.35
206.9685 -63.2689 18.0 -1 USNO-B1 20.92 18.07 19.34
206.9710 -63.2741 2.3 -1 USNO-B1 14.80 13.33 13.98 *
206.9713 -63.2755 6.6 -1 USNO-B1 18.34 13.57 15.69
206.9717 -63.2769 11.6 -1 USNO-B1 13.27 11.97 12.55 *
206.9719 -63.2778 14.6 -1 USNO-B1 13.30 13.29 13.29
206.9613 -63.2772 18.4 -1 USNO-B1 18.97 16.35 17.51
206.9584 -63.2747 18.6 -1 USNO-B1 99.99 17.81 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 20 in the list of sources is a candidate afterglow for 885807_g2160 with genie
ra=206.97167 (13:47:53.20) dec=-63.27753 (-63:16:39.1) +/- 0.6" mag=13.73+/-0.14
dist=151.4 REFID=19 major=0.9 minor=0.6 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 67.9 arc sec from the BAT position.
This source is near the edge of image (0.870)
Found 13 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
206.9773 -63.2732 18.3 -1 USNO-B1 99.99 14.18 99.99
206.9768 -63.2732 17.7 -1 USNO-B1 15.50 13.80 14.55
206.9795 -63.2788 13.5 -1 USNO-B1 18.58 15.75 17.01
206.9725 -63.2737 14.0 -1 USNO-B1 99.99 13.22 99.99
206.9773 -63.2789 10.3 -1 USNO-B1 19.57 15.37 17.23
206.9710 -63.2741 12.2 -1 USNO-B1 14.80 13.33 13.98
206.9713 -63.2755 7.2 -1 USNO-B1 18.34 13.57 15.69
206.9717 -63.2769 2.1 -1 USNO-B1 13.27 11.97 12.55 *
206.9719 -63.2778 1.0 -1 USNO-B1 13.30 13.29 13.29 *
206.9742 -63.2821 17.0 -1 USNO-B1 19.77 17.12 18.30
206.9699 -63.2826 18.5 -1 USNO-B1 18.12 15.91 16.89
206.9698 -63.2829 19.5 -1 USNO-B1 18.13 15.72 16.79
206.9613 -63.2772 16.8 -1 USNO-B1 18.97 16.35 17.51
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 4 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
207.0433 -63.2524 7.0 -1 USNO-B1 18.25 17.50 17.83
207.0472 -63.2521 2.9 -1 USNO-B1 17.03 16.55 16.76
207.0440 -63.2507 9.8 -1 USNO-B1 19.60 17.48 18.42
207.0479 -63.2522 2.6 -1 USNO-B1 18.24 16.36 17.19
The closest star is 2.64" away.
List UVOT sources within 10" of the XRT position:
There are 19741.580 counts in the bkg source region of 5754.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 3.431 counts/pixel (5-sig UL in 4" is 17.98 mag) for 885807_g2160
Do not compute counts in XRT region because position is too far from center.
There are 1 candidate(s) outside XRT error circle with mag < 17.97
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 18.53, XRT distances < 15",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 885807_570194034_190126d11h17m56s476521usUT_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(207.0089,-63.2680,45")
fk5;-circle(207.014844896945,-63.2581907212023,6")
fk5;-circle(207.025251419882,-63.26783426862,6")
fk5;-circle(206.986118217183,-63.2677515723654,6")
fk5;-circle(206.985189962701,-63.2698769734555,6")
fk5;-circle(206.989239742843,-63.2742669713197,6")
fk5;-circle(206.991187042724,-63.2788702022535,6")
Region file: /Home/eud/uvot_tdrss/swift/uvot_gcn/src_885807_XRT.reg
# Region file format: DS9 version 3.0
# find_uvot_ag.pl vrs. 2017-02-17 fem XRT
global font="helvetica 12 bold" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source=1
fk5;circle(207.0475,-63.2529,6.0") # color=red dash=0
point(207.04423,-63.25485) # point=diamond 10 color=red width=2
image paragraph message for exposure 1 of trigger 885807
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: high density of stars, partial overlap
SRCLIST PROBLEM: no srclist afterglow info
See notes for more details.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB190126 (Swift/BAT trigger 885807) at 10:37:53 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 12 seconds with the White filter
starting 2138 seconds after the BAT trigger. No credible afterglow candidate
has been found in the initial data products. The 2.7'x2.7' sub-image covers 24%
of the XRT error circle. Because of the density of catalogued stars, further
analysis is required to report an upper limit for any afterglow in the
sub-image. Results from the list of sources generated on-board are not
available at this time. No correction has been made for the large, but
uncertain, extinction expected.
------- notes for trigger 885807 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190126d11h18m16s535407usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=885807
-expid=570194034 -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/885807/
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 570194034.37394 or about 2019:026:11:13:49 UT
No information found about the number of stars in the star catalog for srclist
region.
Found 25 source(s) in Genie image catalog. Found 4 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 18.53 mag. Found 965 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
64% of the Genie image region.
Genie image analysis:
Found 19741.6 counts in the large background region of 5754.0 pixels or a rate
of 3.431 counts/pixel in a radius of 45.0 arcsec. Based on this background, the
typical 5-sigma UL at a random point in the Genie image is 17.94 mag. for a
4-arcsec aperture. The closest Genie source has ra= 207.0547 dec= -63.2589
mag=16.47 sep=24.64".
This paragraph is only useful if the XRT position is grossly wrong. There are 1
candidate(s) in the image data with mag < 17.97 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=207.05349
(13:48:12.84), DEC=-63.27449 (-63:16:28.2) (J2000). It has a mag of 17.20. It
is 88.6" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 12 seconds with the White filter
starting 2138 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 13:48:12.84 = 207.05349
DEC(J2000) = -63:16:28.2 = -63.27449
with a 90%-confidence error radius of about 0.70 arc sec. The estimated
magnitude is 17.20 with a 1-sigma error of about 0.18. No correction has been
made for the large, but uncertain, extinction expected.
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?
570194034 2138 WHITE srclist data are not available.
570194034 2138 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------