image overlap message for exposure 1 of trigger 852625
uvot_overlap.pl vrs. 2010-12-20b fem started at 180810d10h21m54s572453usUT
The observation of trigger 852625 started 2018-08-10T10:14:17.9
Examining file 852625_g174_uvot_sky_image.fits
The exposure ID is 555588857
The exposure time is 149.868 (seconds)
The filter is WHITE.
*** Warning -- found 13952 null pixels in the image.
The uvot region is centered at (144.4374,-42.7617) with a roll angle of 355.2
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 (144.4360,-42.7670) with a radius of 3.000 arc min
This is 0.325 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
Could not find the location of an XRT error circle
image afterglow message for exposure 1 of trigger 852625
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180810d10h21m55s552550usUT
Observation start time is 2018-08-10T10:14:17.9
Examining file 852625_g174_uvot_catalog_image.fits
The exposure ID is 555588857
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 15 detected source(s) for 852625_g174
Aspect correction adds 0.00045 degrees (0.109 sec of time = 1.20 arc sec) to RA
Aspect correction adds 0.00083 degrees ( 2.99 arcsec) to Dec
Total aspect correction is 3.22 arcsec
Star catalogs centered at 144.4320 , -42.7616 with radius 2.54 arc min.
n_usno: 297 n_gsc: 0
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 11.23186
RA DEC Mag Color
bright star 0: 144.41413 (09:37:39.39) -42.74955 (-42:44:58.4) 11.23 USNO-V
bright star 1: 144.42999 (09:37:43.20) -42.78564 (-42:47:08.3) 11.25 USNO-R
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 13 matched entries is 0.652" for 852625_g174
Mean and std. dev of mag. difference (MAG_DELTA) are 1.563 and 0.466 for 852625_g174
Found 2 entries without IDs and 1 entries that are acceptable afterglow candidates for 852625_g174.
Acceptable entries have no ID, BAT distance < 200" or XRT distance < 10", 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=144.4360 (09:37:44.64) DEC=-42.7670 (-42:46:01.2)
XRT distances are as reported in catalog file.
-----------------
Entry 2 in the list of sources is a candidate afterglow for 852625_g174 with genie
ra=144.42810 (09:37:42.74) dec=-42.75358 (-42:45:12.9) +/- 0.6" mag=18.05+/-0.15
dist=52.6 REFID=10 major=2.4 minor=1.6 flag=0
Found 4 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
144.4303 -42.7586 18.9 -1 USNO-B1 20.77 20.14 20.42
144.4295 -42.7543 4.4 -1 USNO-B1 20.19 18.83 19.43
144.4221 -42.7540 15.9 -1 USNO-B1 18.07 16.38 17.13
144.4271 -42.7490 16.6 -1 USNO-B1 17.77 16.10 16.84
*** unacceptable major profile of 2.4
There are 64277.004 counts in the bkg source region of 2329.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 27.599 counts/pixel (5-sig UL in 4" is 19.55 mag) for 852625_g174
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.54, BAT distances < 200",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 852625_555588857_180810d10h21m55s552550usUT_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(144.4374,-42.7617,45")
fk5;-circle(144.428098527342,-42.7535836843658,6")
fk5;-circle(144.422078062631,-42.7537879836934,6")
fk5;-circle(144.439258187578,-42.749996153773,6")
image paragraph message for exposure 1 of trigger 852625
------ Start for Possible Stand-alone Circular ----
In response to GRB180810 (Swift/BAT trigger 852625) at 10:11:22 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 153 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 09:37:34.86 = 144.39524
DEC(J2000) = -42:48:20.6 = -42.80571
with a 90%-confidence error radius of about 1.10 arc sec. This position is
176.1 arc sec. from the center of the BAT error circle. The estimated magnitude
is 18.13. No correction has been made for the expected extinction corresponding
to E(B-V) of 0.52.
------- notes for trigger 852625 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180810d10h21m58s843672usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=852625
-expid=555588857 -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/852625/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
No XRT position found for srclist. No XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 555588857.91952 or about 2018:222:10:14:12 UT
Found 1875 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 32% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 13 srclist
source(s) without IDs. There are 1 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.66 mag.
Found 15 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 19.54 mag. Found 293 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
31% of the Genie image region. The Genie image is INCOMPLETE with 13952 null
pixels.
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?
555588857 153 WHITE 144.39524 -42.80571 18.13/18.7 176.1 srclist Yes
555588857 153 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: -42.80571
GRB_ERROR: 1.10
GRB_RA: 144.39524
IMAGE_START_TIME: 10:14:12
MAGNITUDE: 18.13
MAG_ERROR: 0.4
MESSAGE_TYPE: ACK
SOURCE: BAT