image overlap message for exposure 1 of trigger 1144538
uvot_overlap.pl vrs. 2010-12-20b fem started at 221215d04h01m31s193515usUT
The observation of trigger 1144538 started 2022-12-15T03:57:25.5
Examining file 1144538_g1320_uvot_sky_image.fits
The exposure ID is 692769445
The exposure time is 139.711 (seconds)
The filter is WHITE.
The uvot region is centered at (54.7865,-27.4385) with a roll angle of 210.6
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 (54.7890,-27.4330) with a radius of 3.000 arc min
This is 0.355 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 1144538
find_uvot_ag.pl vrs. 2020-10-30 fem started at 221215d04h01m32s265547usUT
Observation start time is 2022-12-15T03:57:25.5
Examining file 1144538_g1320_uvot_catalog_image.fits
The exposure ID is 692769445
The exposure is 139.711 sec.
The bin size is 2 pixels
The filter is WHITE
There are 6 detected source(s) for 1144538_g1320
Aspect correction adds -0.00022 degrees (-0.052 sec of time = -0.69 arc sec) to RA
Aspect correction adds -0.00157 degrees (-5.67 arcsec) to Dec
Total aspect correction is 5.71 arcsec
Star catalogs centered at 54.7948 , -27.4427 with radius 2.00 arc min.
n_usno: 44 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 4 matched entries is 0.617" for 1144538_g1320
Mean and std. dev of mag. difference (MAG_DELTA) are 0.539 and 0.331 for 1144538_g1320
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 1144538_g1320.
Acceptable entries have no ID, XRT distances < 10", 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=54.7890 (03:39:09.36) DEC=-27.4330 (-27:25:58.8)
XRT distances are as reported in catalog file.
*** WARNING 33 per cent of entries have no IDs.
-----------------
Entry 3 in the list of sources is a candidate afterglow for 1144538_g1320 with genie
ra=54.80846 (03:39:14.03) dec=-27.44652 (-27:26:47.5) +/- 0.7" mag=20.05+/-0.18
dist=675.2 REFID=4 major=5.3 minor=3.8 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 79.0 arc sec from the BAT position.
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
54.8086 -27.4414 18.4 -1 USNO-B1 21.09 99.99 99.99
54.8066 -27.4499 13.6 -1 USNO-B1 18.75 19.82 19.34
54.8094 -27.4498 12.1 -1 USNO-B1 14.57 13.35 13.89
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 5.3
-----------------
Entry 4 in the list of sources is a candidate afterglow for 1144538_g1320 with genie
ra=54.80973 (03:39:14.34) dec=-27.44658 (-27:26:47.7) +/- 0.7" mag=19.46+/-0.16
dist=677.7 REFID=5 major=6.5 minor=3.5 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 82.3 arc sec from the BAT position.
Found 3 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
54.8086 -27.4414 18.9 -1 USNO-B1 21.09 99.99 99.99
54.8066 -27.4499 15.6 -1 USNO-B1 18.75 19.82 19.34
54.8094 -27.4498 11.6 -1 USNO-B1 14.57 13.35 13.89
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 6.5
List UVOT sources within 10" of the XRT position:
There are 34481.695 counts in the bkg source region of 6100.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 5.653 counts/pixel (5-sig UL in 4" is 20.33 mag) for 1144538_g1320
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 20.89, XRT distances < 10",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1144538_692769445_221215d04h01m32s265547usUT_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(54.7865,-27.4385,45")
fk5;-circle(54.7960319378082,-27.4353803088725,6")
fk5;-circle(54.7798165267875,-27.4482701880431,6")
image paragraph message for exposure 1 of trigger 1144538
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: overlap undefined
SRCLIST PROBLEM: overlap is unknown
See notes for more details.
------ Start for Possible Stand-alone Circular ----
In response to GRB221215 (Swift/BAT trigger 1144538) at 03:35:24 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 140 seconds with the White filter
starting 1290 seconds after the BAT trigger. No credible afterglow candidate
has been found in the initial data products. The overlap of the sub-image and
the XRT error circle is uncertain. The overlap of the 8'x8' region for the list
of sources generated on-board and the XRT error circle is uncertain. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.013.
------- notes for trigger 1144538 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 221215d04h01m34s218817usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1144538
-expid=692769445 -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/1144538/
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 692769445.52084 or about 2022:349:03:57:20 UT
Found 348 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 23 sources in
srclist catalog. Found 5 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 6 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 20.89 mag. Found 40 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 6% of the
Genie image region. The closest srclist source has ra= 54.7135 dec= -27.4001
mag=19.30 sep=390.14". The closest Genie source has ra= 54.7960 dec= -27.4354
mag=19.94 sep=619.43".
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?
692769445 1290 WHITE srclist found no candidates.
692769445 1290 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------