srclist overlap message for exposure 1 of trigger 967774
uvot_overlap.pl vrs. 2010-12-20b fem started at 200425d07h43m03s025243usUT
The observation of trigger 967774 started 2020-04-25T00:18:20.3
Examining file ./967774_g118_uvot_sky_srclist.fits
The exposure ID is 609466700
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (85.2369,-13.4553) with a roll angle of 295.2
It is square with sides of 8.03 arc min. for an area of 64.51 sq arc min
The BAT error circle is centered at (85.2410,-13.4590) with a radius of 3.000 arc min
This is 0.328 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 (85.2195,-13.4351) with a radius of 0.027 arc min
This is 1.579 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 1 of trigger 967774
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200425d07h43m06s135764usUT
Observation start time is 2020-04-25T00:18:20.3
Examining file ./967774_g118_uvot_catalog_srclist.fits
The exposure ID is 609466700
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 54 detected source(s) for 967774_g118
Aspect correction adds -0.00090 degrees (-0.215 sec of time = -3.14 arc sec) to RA
Aspect correction adds -0.00012 degrees (-0.44 arcsec) to Dec
Total aspect correction is 3.17 arcsec
Star catalogs centered at 85.2335 , -13.4544 with radius 6.03 arc min.
n_usno: 397 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 51 matched entries is 0.591" for 967774_g118
Mean and std. dev of mag. difference (MAG_DELTA) are 1.141 and 0.393 for 967774_g118
Found 3 entries without IDs and 2 entries that are acceptable afterglow candidates for 967774_g118.
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.
Magnitude criteria will be applied later.
BAT distances are from RA=85.2410 (05:40:57.84) DEC=-13.4590 (-13:27:32.4)
XRT distances are from RA=85.2195 (05:40:52.68) DEC=-13.4351 (-13:26:06.4)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 967774_g118 with 3x3 stamp
ra=85.24766 (05:40:59.44) dec=-13.46186 (-13:27:42.7) +/- 1.1" mag=19.10+/-0.35
dist=137.8 REFID=43
*** The position of this source is inconsistent with the XRT position.
The position is 25.5 arc sec from the BAT position.
src: 0 srclist_match has ID
src: 0 distr. of nearby unmatched sources: 1 0 0 0 0
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
85.2454 -13.4588 13.5 -1 USNO-B1 20.38 18.88 19.54
85.2475 -13.4606 4.6 -1 USNO-B1 20.19 18.20 19.08
85.2477 -13.4613 1.9 -1 USNO-B1 18.05 16.60 17.25 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 11 in the list of sources is a candidate afterglow for 967774_g118 with 3x3 stamp
ra=85.21539 (05:40:51.69) dec=-13.43542 (-13:26:07.5) +/- 1.1" mag=19.72+/-0.35
dist=14.4 REFID=52
*** The position of this source is inconsistent with the XRT position.
The position is 123.5 arc sec from the BAT position.
src: 11 distr. of nearby unmatched sources: 0 0 0 0 0
Found 1 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
85.2147 -13.4360 3.2 -1 USNO-B1 18.38 16.13 17.13 *
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:
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: 0 good candidate(s) found.
srclist paragraph message for exposure 1 of trigger 967774
IMAGE PROBLEM: no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB200425 (Swift/BAT trigger 967774) at 00:16:21 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 93 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 none of
the XRT error circle. The 8'x8' region for the list of sources generated
on-board covers 100% of the XRT error circle. The list of sources is typically
complete to about 18 mag. No correction has been made for the expected
extinction corresponding to E(B-V) of 0.16.
------- notes for trigger 967774 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200425d07h43m10s748078usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=967774
-expid=609466700 -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/967774/
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 609466700.31196 or about 2020:116:00:18:15 UT
Found 393 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 7% of the srclist region. Found 54 sources in
srclist catalog. Found 3 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 13 source(s) in Genie image catalog. Found 2 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.49 mag. Found 70 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
7% of the Genie image region.
Genie image analysis:
Found 81404.0 counts in the large background region of 6016.0 pixels or a rate
of 13.531 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 19.94 mag. for a
4-arcsec aperture. The closest srclist source has ra= 85.2154 dec= -13.4354
mag=19.72 sep=14.44". The closest Genie source has ra= 85.2216 dec= -13.4506
mag=17.53 sep=56.41".
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?
609466700 93 WHITE srclist found no candidates.
609466700 93 WHITE image found no candidates.
List afterglow candidates for other finding charts.
609466859 252 U srclist found no candidates.
609466859 252 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: -13.43511
GRB_ERROR: 5
GRB_RA: 85.21950
IMAGE_START_TIME: 00:18:15
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT