image overlap message for exposure 2 of trigger 1162001
uvot_overlap.pl vrs. 2010-12-20b fem started at 230328d19h03m08s769802usUT
The observation of trigger 1162001 started 2023-03-28T15:00:45.8
Examining file ./1162001_g356_uvot_sky_image.fits
The exposure ID is 701708445
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (291.0165,80.0172) with a roll angle of 103.1
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 (290.9860,80.0160) 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
The XRT error circle is centered at (291.0071,80.0095) with a radius of 0.035 arc min
This is 0.469 arc min from the center of the uvot region
The area of the XRT error circle is 0.004 sq. arc min
The UVOT/XRT overlap is 0.004 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1162001
find_uvot_ag.pl vrs. 2023-03-28 fem started at 230328d19h03m21s384150usUT
Observation start time is 2023-03-28T15:00:45.8
Examining file ./1162001_g356_uvot_catalog_image.fits
The exposure ID is 701708445
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 5 detected source(s) for 1162001_g356
Aspect correction adds 0.00518 degrees (1.243 sec of time = 3.23 arc sec) to RA
Aspect correction adds -0.00008 degrees (-0.28 arcsec) to Dec
Total aspect correction is 3.24 arcsec
*** WARNING -- access to usno-b1 catalog failed.
Star catalogs centered at 290.9360 , 80.0220 with radius 2.45 arc min.
n_usno: -1 n_gsc: 0
*** WARNING -- no star catalog entries found.
-- this strongly suggests a problem with the catalogs.
-- cannot check for bright stars or nearby sources.
-- there is a high risk of false positives.
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 4 matched entries is 0.275" for 1162001_g356
Mean and std. dev of mag. difference (MAG_DELTA) are 0.936 and 0.246 for 1162001_g356
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1162001_g356.
Acceptable entries have no ID, XRT distances < 5.25", 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=290.9860 (19:23:56.64) DEC=80.0160 (+80:00:57.6)
XRT distances are from RA=291.0071 (19:24:01.71) DEC=80.0095 (+80:00:34.3)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1162001_g356 with genie
ra=291.00803 (19:24:01.93) dec=80.00956 (+80:00:34.4) +/- 0.8" mag=19.32+/-0.20
dist=0.6 REFID=5 major=1.1 minor=1.0 flag=0
Found 0 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)
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=291.00803 (19:24:01.93) dec=80.00956 (+80:00:34.4) +/- 0.8" mag=19.32+/-0.20 dist=0.6 REFID=5 flag=0
There are 18409.877 counts in the bkg source region of 6096.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 3.020 counts/pixel (5-sig UL in 4" is 19.86 mag) for 1162001_g356
There are 231.14752 counts in the src source region of 50.000000 pixels.
Rate in src region with 4 arcsec radius is 4.623 counts/pixel for 1162001_g356
There are 3657.7151 counts in the cand_src_bkg source region of 1216.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 3.008 counts/pixel (5-sig UL in 4" is 19.87 mag) for 1162001_g356
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 20.42, XRT distances < 5.25",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
Region file: 1162001_701708445_230328d19h03m21s384150usUT_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(291.0165,80.0172,45")
fk5;-circle(291.008027107976,80.0095627496338,6")
fk5;-circle(290.99733503242,80.0066621094786,6")
Region file: 1162001_701708445_230328d19h03m21s384150usUT_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(291.008027107976,80.0095627496338,4")
Region file: 1162001_701708445_230328d19h03m21s384150usUT_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(291.008027107976,80.0095627496338,25")
fk5;-circle(291.008027107976,80.0095627496338,15")
fk5;-circle(290.99733503242,80.0066621094786,6")
image paragraph message for exposure 2 of trigger 1162001
------ Start for Possible Stand-alone Circular ----
In response to GRB230328 (Swift/BAT trigger 1162001) at 14:54:48 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
326 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 19:24:01.93 = 291.00803
DEC(J2000) = +80:00:34.4 = 80.00956
with a 90%-confidence error radius of about 0.75 arc sec. This position is 0.6
arc sec. from the center of the XRT error circle. The estimated magnitude is
19.32 with a 1-sigma error of about 0.20. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.070.
------- notes for trigger 1162001 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 230328d19h03m33s943372usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1162001
-expid=701708445 -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/1162001/
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 701708445.84964 or about 2023:087:15:00:40 UT
Access to USNO star catalog FAILED. This increases the odds of a FALSE
afterglow detection. There was likely a PROBLEM with the srclist star catalog
because no stars found. Found 128 sources in srclist catalog. Found 58 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.12 mag.
Access to USNO star catalog FAILED. This increases the odds of a FALSE
afterglow detection. Found 5 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 20.42 mag. Found 0 stars in largest star catalog for Genie
image region. The stars will eliminate afterglows from about 0% of the Genie
image region. The closest srclist source has ra= 290.9975 dec= 80.0068
mag=18.03 sep=11.60".
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?
701708445 325 U srclist found no candidates.
701708445 325 U 291.00803 80.00956 19.32/20.4 0.6 image Yes
List afterglow candidates for other finding charts.
701708233 113 WHITE 291.00842 80.00978 19.01/19.2 1.2 srclist Yes
701708233 113 WHITE 291.00765 80.00959 18.22/20.9 0.4 image Yes
701708976 856 ? srclist data are not available.
701708976 856 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 80.00956
GRB_ERROR: 0.75
GRB_RA: 291.00803
IMAGE_START_TIME: 15:00:40
MAGNITUDE: 19.32
MAG_ERROR: 0.20
MESSAGE_TYPE: ACK
SOURCE: XRT