srclist overlap message for exposure 2 of trigger 1218701
uvot_overlap.pl vrs. 2010-12-20b fem started at 240305d04h32m39s253055usUT
The observation of trigger 1218701 started 2024-03-05T04:28:43.0
Examining file 1218701_g900_uvot_sky_srclist.fits
The exposure ID is 731305723
The exposure time is undefined.
The filter is U.
The uvot region is centered at (229.7134,-57.3462) with a roll angle of 115.8
It is square with sides of 12.05 arc min. for an area of 145.15 sq arc min
The BAT error circle is centered at (229.7050,-57.3430) with a radius of 3.000 arc min
This is 0.334 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 28.27 sq. arc min or 1.00 of the BAT error circle
The XRT error circle is centered at (229.7317,-57.3641) with a radius of 0.098 arc min
This is 1.225 arc min from the center of the uvot region
The area of the XRT error circle is 0.030 sq. arc min
The UVOT/XRT overlap is 0.030 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 2 of trigger 1218701
find_uvot_ag.pl vrs. 2023-04-25a fem started at 240305d04h32m40s256784usUT
Observation start time is 2024-03-05T04:28:43.0
Examining file 1218701_g900_uvot_catalog_srclist.fits
The exposure ID is 731305723
The exposure is 250.000 sec.
The bin size is 2 pixels
The filter is U
There are 128 detected source(s) for 1218701_g900
Aspect correction adds 0.00005 degrees (0.011 sec of time = 0.09 arc sec) to RA
Aspect correction adds -0.00193 degrees (-6.93 arcsec) to Dec
Total aspect correction is 6.93 arcsec
Star catalogs centered at 229.6786 , -57.3537 with radius 8.72 arc min.
n_usno: 2715 n_gsc: 6443
*** WARNING -- bright star catalog has 13 entries brighter than 12 mag
The brightest has mag 9.33
RA DEC Mag Color
bright star 0: 229.65541 (15:18:37.30) -57.37598 (-57:22:33.5) 11.39 USNO-V
bright star 1: 229.58639 (15:18:20.73) -57.32400 (-57:19:26.4) 11.35 USNO-V
bright star 2: 229.80739 (15:19:13.77) -57.33840 (-57:20:18.3) 11.92 USNO-V
bright star 3: 229.57403 (15:18:17.77) -57.40465 (-57:24:16.7) 11.42 USNO-V
bright star 4: 229.73428 (15:18:56.23) -57.27204 (-57:16:19.3) 11.16 USNO-V
bright star 5: 229.63025 (15:18:31.26) -57.43713 (-57:26:13.7) 11.32 USNO-V
bright star 6: 229.63112 (15:18:31.47) -57.26543 (-57:15:55.5) 9.33 GSC-V
bright star 7: 229.80650 (15:19:13.56) -57.42036 (-57:25:13.3) 10.95 USNO-V
bright star 8: 229.65113 (15:18:36.27) -57.46005 (-57:27:36.2) 11.46 USNO-V
bright star 9: 229.87782 (15:19:30.68) -57.32019 (-57:19:12.7) 11.32 USNO-V
bright star 10: 229.67887 (15:18:42.93) -57.21489 (-57:12:53.6) 11.40 USNO-V
bright star 11: 229.69171 (15:18:46.01) -57.21256 (-57:12:45.2) 10.94 USNO-V
bright star 12: 229.46844 (15:17:52.43) -57.32407 (-57:19:26.7) 11.93 GSC-V
Mean distance difference (CAT_DELTA) for 73 matched entries is 0.997" for 1218701_g900
Mean and std. dev of mag. difference (MAG_DELTA) are 3.192 and 1.020 for 1218701_g900
Found 56 entries without IDs and 2 entries that are acceptable afterglow candidates for 1218701_g900.
Acceptable entries have no ID, XRT distances < 14.75", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
25 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=229.7050 (15:18:49.20) DEC=-57.3430 (-57:20:34.8)
XRT distances are from RA=229.7317 (15:18:55.61) DEC=-57.3641 (-57:21:50.8)
*** WARNING 43 per cent of entries have no IDs.
-----------------
Entry 2 in the list of sources is a candidate afterglow for 1218701_g900 with 3x3 stamp
ra=229.67759 (15:18:42.62) dec=-57.35813 (-57:21:29.3) +/- 1.1" mag=19.29+/-0.35
dist=107.2 REFID=112
*** The position of this source is inconsistent with the XRT position.
The position is 76.2 arc sec from the BAT position.
src: 2 distr. of nearby unmatched sources: 0 0 1 0 0
Found 6 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
229.6746 -57.3567 7.8 -1 USNO-B1 14.13 13.21 13.62
229.6791 -57.3617 13.2 -1 USNO-B1 17.98 16.64 17.24
229.6830 -57.3628 19.9 -1 USNO-B1 17.36 15.97 16.59
229.6745 -57.3568 7.8 -1 GSC2.3 12.78 14.12 13.28 *
229.6788 -57.3617 13.0 -1 GSC2.3 16.43 18.43 17.06
229.6829 -57.3628 19.7 -1 GSC2.3 15.91 17.69 16.49
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 5 in the list of sources is a candidate afterglow for 1218701_g900 with 3x3 stamp
ra=229.67325 (15:18:41.58) dec=-57.35636 (-57:21:22.9) +/- 1.1" mag=17.85+/-0.35
dist=116.9 REFID=49
*** The position of this source is inconsistent with the XRT position.
The position is 78.2 arc sec from the BAT position.
src: 5 distr. of nearby unmatched sources: 0 0 1 0 0
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
229.6746 -57.3567 2.9 -1 USNO-B1 14.13 13.21 13.62 *
229.6692 -57.3531 14.1 -1 USNO-B1 99.99 20.64 99.99
229.6688 -57.3532 14.3 -1 USNO-B1 99.99 20.97 99.99
229.6745 -57.3568 2.8 -1 GSC2.3 12.78 14.12 13.28 *
229.6688 -57.3532 14.3 -1 GSC2.3 19.15 99.99 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 5 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
229.7281 -57.3648 7.4 -1 USNO-B1 17.87 16.37 17.03
229.7334 -57.3647 3.9 -1 USNO-B1 99.99 18.13 99.99
229.7337 -57.3647 4.5 -1 USNO-B1 99.99 18.29 99.99
229.7280 -57.3648 7.7 -1 GSC2.3 16.30 18.04 16.83
229.7337 -57.3645 4.2 -1 GSC2.3 17.69 99.99 99.99
The closest star is 3.86" away.
List UVOT sources within 10" of the XRT position:
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 18.12, XRT distances < 14.75",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: /Home/eud/uvot_tdrss/swift/uvot_gcn/src_1218701_XRT.reg
# Region file format: DS9 version 3.0
# find_uvot_ag.pl vrs. 2023-04-25a fem XRT
global font="helvetica 12 bold" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source=1
fk5;circle(229.7317,-57.3641,5.9") # color=red dash=0
point(229.73175,-57.36603) # point=diamond 10 color=red width=2
srclist paragraph message for exposure 2 of trigger 1218701
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB240305 (Swift/BAT trigger 1218701) at 04:13:42 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the U filter starting
867 seconds after the BAT trigger. No credible afterglow candidate has been
found in the initial data products. Results from the 2.7'x2.7' sub-image are
not available at this time. The 8'x8' region for the list of sources generated
on-board covers 100% of the XRT error circle. The list of sources is typically
complete to about 18.0 mag. No correction has been made for the large, but
uncertain, extinction expected.
------- notes for trigger 1218701 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 240305d04h32m44s913224usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1218701
-expid=731305723 -msg_srclist
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/1218701/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for bat position. Unreliable extinction found for
xrt position. XRT position found for srclist. BAT position found.
UVOT exposure began at MET 731305723.04302 or about 2024:065:04:28:38 UT
Found 2711 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 24% of the srclist region. Found 128 sources in
srclist catalog. Found 56 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.12 mag.
The closest srclist source has ra= 229.7176 dec= -57.3542 mag=18.05 sep=44.93".
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?
731305723 867 U srclist found no candidates.
731305723 867 U image data are not available.
List afterglow candidates for other finding charts.
731305139 283 ? srclist data are not available.
731305139 283 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: u
GRB_DEC: -57.36410
GRB_ERROR: 14.75
GRB_RA: 229.73170
IMAGE_START_TIME: 04:28:38
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT