image overlap message for exposure 1 of trigger 958141
uvot_overlap.pl vrs. 2010-12-20b fem started at 200224d16h22m35s629695usUT
The observation of trigger 958141 started 2020-02-24T03:26:54.8
Examining file ./958141_g124_uvot_sky_image.fits
The exposure ID is 604207614
The exposure time is 149.813 (seconds)
The filter is WHITE.
The uvot region is centered at (248.8001,41.6768) with a roll angle of 98.6
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 (248.7940,41.6750) with a radius of 3.000 arc min
This is 0.293 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 (248.7665,41.6113) with a radius of 0.028 arc min
This is 4.205 arc min from the center of the uvot region
The area of the XRT error circle is 0.003 sq. arc min
The UVOT/XRT overlap is 0.000 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 958141
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200224d16h22m39s882034usUT
Observation start time is 2020-02-24T03:26:54.8
Examining file ./958141_g124_uvot_catalog_image.fits
The exposure ID is 604207614
The exposure is 149.813 sec.
The bin size is 2 pixels
The filter is WHITE
There are 4 detected source(s) for 958141_g124
Aspect correction adds 0.00094 degrees (0.226 sec of time = 2.53 arc sec) to RA
Aspect correction adds -0.00084 degrees (-3.02 arcsec) to Dec
Total aspect correction is 3.94 arcsec
Star catalogs centered at 248.8016 , 41.6747 with radius 2.45 arc min.
n_usno: 51 n_gsc: 0
*** WARNING -- XRT position is outside star catalog search region.
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 4 matched entries is 0.231" for 958141_g124
Mean and std. dev of mag. difference (MAG_DELTA) are 1.296 and 0.352 for 958141_g124
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 958141_g124.
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=248.7940 (16:35:10.56) DEC=41.6750 (+41:40:30.0)
XRT distances are from RA=248.7665 (16:35:03.97) DEC=41.6113 (+41:36:40.8)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 36709.992 counts in the bkg source region of 6306.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 5.821 counts/pixel (5-sig UL in 4" is 20.39 mag) for 958141_g124
Do not compute counts in XRT region because position is too far from center.
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 20.95, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 958141_604207614_200224d16h22m39s882034usUT_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(248.8001,41.6768,45")
image paragraph message for exposure 1 of trigger 958141
WARNING -- candidate position is outside the current BAT error region. BAT position is from GCN_Position_Notice_Mon_24_Feb_20_03:25:47_UT.
------ Start for Possible Stand-alone Circular ----
In response to GRB200224 (Swift/BAT trigger 958141) at 03:24:49 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 101 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 16:35:04.19 = 248.76744
DEC(J2000) = +41:36:42.6 = 41.61182
with a 90%-confidence error radius of about 1.10 arc sec. This position is 3.0
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.45. No correction has been made for the expected extinction corresponding to
E(B-V) of 0.00.
------- notes for trigger 958141 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200224d16h22m42s961738usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=958141
-expid=604207614 -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/958141/
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.
*** Warning -- BAT and XRT error circles do NOT overlap.
UVOT exposure began at MET 604207614.80126 or about 2020:055:03:26:49 UT
Found 241 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 37 sources in
srclist catalog. Found 3 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 4 source(s) in Genie image catalog. Found 0 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 20.95 mag. Found 47 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 5% of the
Genie image region. The XRT position was OUTSIDE the star catalog search
region. The closest Genie source has ra= 248.7892 dec= 41.6611 mag=20.63
sep=189.35".
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?
604207614 100 WHITE 248.76744 41.61182 18.45/19.2 3.0 srclist Yes
604207614 100 WHITE image found no candidates.
List afterglow candidates for other finding charts.
604207772 258 U 248.76775 41.61167 19.12/18.1 3.2 srclist Yes
604207772 258 U image found no candidates.
604208374 860 WHITE srclist found no candidates.
604208374 860 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 41.61182
GRB_ERROR: 1.10
GRB_RA: 248.76744
IMAGE_START_TIME: 03:26:49
MAGNITUDE: 18.45
MAG_ERROR: 0.4
MESSAGE_TYPE: ACK
SOURCE: XRT