image overlap message for exposure 1 of trigger 1202522
uvot_overlap.pl vrs. 2010-12-20b fem started at 231215d16h33m32s461580usUT
The observation of trigger 1202522 started 2023-12-15T10:33:30.6
Examining file ./1202522_g2764_uvot_sky_image.fits
The exposure ID is 724329210
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (9.7277,57.6485) with a roll angle of 271.2
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 (9.7500,57.6420) with a radius of 3.000 arc min
This is 0.818 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 (9.7396,57.6479) with a radius of 0.037 arc min
This is 0.384 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 1 of trigger 1202522
find_uvot_ag.pl vrs. 2023-04-25a fem started at 231215d16h33m35s661134usUT
Observation start time is 2023-12-15T10:33:30.6
Examining file ./1202522_g2764_uvot_catalog_image.fits
The exposure ID is 724329210
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 21 detected source(s) for 1202522_g2764
Aspect correction adds -0.00389 degrees (-0.933 sec of time = -7.49 arc sec) to RA
Aspect correction adds 0.00111 degrees ( 4.00 arcsec) to Dec
Total aspect correction is 8.49 arcsec
Star catalogs centered at 9.7295 , 57.6525 with radius 2.67 arc min.
n_usno: 282 n_gsc: 275
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 10.32956
RA DEC Mag Color
bright star 0: 9.66517 (00:38:39.64) 57.67628 (+57:40:34.6) 10.33 USNO-V
Mean distance difference (CAT_DELTA) for 21 matched entries is 0.738" for 1202522_g2764
Mean and std. dev of mag. difference (MAG_DELTA) are 0.968 and 0.441 for 1202522_g2764
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 1202522_g2764.
Acceptable entries have no ID, XRT distances < 5.5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA= 9.7500 (00:39:00.00) DEC=57.6420 (+57:38:31.2)
XRT distances are from RA= 9.7396 (00:38:57.50) DEC=57.6479 (+57:38:52.6)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1202522_g2764 with genie
ra=9.73953 (00:38:57.49) dec=57.64741 (+57:38:50.7) +/- 0.6" mag=17.45+/-0.14
dist=1.9 REFID=13 major=1.7 minor=1.4 flag=0
Found 12 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
9.7327 57.6513 19.3 -1 USNO-B1 20.12 18.07 18.99
9.7330 57.6511 18.4 -1 USNO-B1 19.83 17.89 18.75
9.7401 57.6503 10.5 -1 USNO-B1 20.45 18.97 19.63
9.7324 57.6448 16.8 -1 USNO-B1 16.16 14.82 15.42
9.7462 57.6493 14.6 -1 USNO-B1 99.99 19.01 99.99
9.7381 57.6433 15.2 -1 USNO-B1 20.29 99.99 99.99
9.7331 57.6511 18.0 -1 GSC2.3 17.92 19.85 99.99
9.7403 57.6502 10.1 -1 GSC2.3 19.23 21.49 99.99
9.7324 57.6447 16.8 -1 GSC2.3 14.38 15.83 14.95
9.7464 57.6491 14.6 -1 GSC2.3 19.74 99.99 99.99
9.7401 57.6440 12.2 -1 GSC2.3 20.03 21.85 99.99
9.7369 57.6423 19.0 -1 GSC2.3 19.84 22.36 99.99
*** unacceptable major profile of 1.7
-----------------
Entry 8 in the list of sources is a candidate afterglow for 1202522_g2764 with genie
ra=9.72948 (00:38:55.08) dec=57.63061 (+57:37:50.2) +/- 1.0" mag=20.65+/-0.29
dist=65.3 REFID=1 major=0.8 minor=0.4 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 57.0 arc sec from the BAT position.
Found 5 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
9.7267 57.6307 5.4 -1 USNO-B1 20.44 18.87 19.57
9.7320 57.6296 6.0 -1 USNO-B1 20.20 18.57 19.29
9.7299 57.6359 19.2 -1 GSC2.3 18.16 19.83 18.09
9.7268 57.6306 5.2 -1 GSC2.3 19.03 21.39 99.99
9.7320 57.6296 6.1 -1 GSC2.3 20.05 22.07 99.99
*** If XRT position is correct, then this is NOT the afterglow
Found 2 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
9.7401 57.6503 8.6 -1 USNO-B1 20.45 18.97 19.63
9.7403 57.6502 8.2 -1 GSC2.3 19.23 21.49 99.99
The closest star is 8.16" away.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=9.73953 (00:38:57.49) dec=57.64741 (+57:38:50.7) +/- 0.6" mag=17.45+/-0.14 dist=1.9 REFID=13 flag=0
There are 99961.734 counts in the bkg source region of 5950.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 16.800 counts/pixel (5-sig UL in 4" is 19.82 mag) for 1202522_g2764
There are 4707.0640 counts in the xrt source region of 202.00000 pixels.
Rate in xrt region with 8 arcsec radius is 23.302 counts/pixel for 1202522_g2764
There are 20016.428 counts in the xrt_bkg source region of 1154.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 17.345 counts/pixel (5-sig UL in 4" is 19.80 mag) for 1202522_g2764
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.37, XRT distances < 5.5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1202522_724329210_231215d16h33m35s661134usUT_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(9.7277,57.6485,45")
fk5;-circle(9.73952611547626,57.6474114307163,6")
fk5;-circle(9.73226652040866,57.6447261189191,6")
fk5;-circle(9.71898951038958,57.6419753866348,6")
fk5;-circle(9.72097108380247,57.6610713128455,6")
Region file: 1202522_724329210_231215d16h33m35s661134usUT_xrt.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(9.73958,57.64794,8")
Region file: 1202522_724329210_231215d16h33m35s661134usUT_xrt_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(9.73958,57.64794,25")
fk5;-circle(9.73958,57.64794,15")
fk5;-circle(9.73226652040866,57.6447261189191,6")
image paragraph message for exposure 1 of trigger 1202522
1 source(s) near the XRT position were rejected as afterglow candidate(s). See
notes for details.
------ Start for Possible Stand-alone Circular ----
In response to GRB231215 (Swift/BAT trigger 1202522) at 09:47:25 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 2732 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 00:38:57.59 = 9.73995
DEC(J2000) = +57:38:51.1 = 57.64754
with a 90%-confidence error radius of about 1.10 arc sec. This position is 1.6
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.83. No correction has been made for the expected extinction corresponding to
E(B-V) of 0.505.
------- notes for trigger 1202522 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 231215d16h33m38s982241usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1202522
-expid=724329210 -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/1202522/
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 724329210.63236 or about 2023:349:10:33:25 UT
Found 1614 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 30% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 73 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 21 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. 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
20.37 mag. Found 278 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 27% of the Genie image region.
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 9.7395 dec= 57.6474 mag=17.45 sep=1.91". The closest Genie
source has ra= 9.7395 dec= 57.6474 mag=17.45 sep=1.91".
This paragraph is only useful if the XRT position is grossly wrong. There are
11 candidate(s) in the srclist data with mag < 18.66 inside the BAT error
region, but outside the XRT error region. The brightest such source is at
RA=9.73763 (00:38:57.03), DEC=57.59527 (+57:35:43.0) (J2000). It has a mag of
17.51. It is 169.9" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 2732 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 00:38:57.03 = 9.73763
DEC(J2000) = +57:35:43.0 = 57.59527
with a 90%-confidence error radius of about 1.10 arc sec. The estimated
magnitude is 17.51 with a 1-sigma error of about 0.35. No correction has been
made for the expected extinction corresponding to E(B-V) of 0.505.
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?
724329210 2732 WHITE 9.73995 57.64754 18.83/19.2 1.6 srclist Yes
724329210 2732 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 57.64754
GRB_ERROR: 1.10
GRB_RA: 9.73995
IMAGE_START_TIME: 10:33:25
MAGNITUDE: 18.83
MAG_ERROR: 0.4
MESSAGE_TYPE: ACK
SOURCE: XRT