srclist overlap message for exposure 1 of trigger 811074
uvot_overlap.pl vrs. 2010-12-20b fem started at 180221d07h29m05s670934usUT
The observation of trigger 811074 started 2018-02-21T07:20:15.6
Examining file 811074_g2970_uvot_sky_srclist.fits
The exposure ID is 540890415
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (326.7809,-72.8637) with a roll angle of 8.6
It is square with sides of 8.03 arc min. for an area of 64.51 sq arc min
The BAT error circle is centered at (326.7720,-72.8680) with a radius of 3.000 arc min
This is 0.302 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
Could not find the location of an XRT error circle
srclist afterglow message for exposure 1 of trigger 811074
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180221d07h29m06s868908usUT
Observation start time is 2018-02-21T07:20:15.6
Examining file 811074_g2970_uvot_catalog_srclist.fits
The exposure ID is 540890415
The exposure is 149.870 sec.
The bin size is 2 pixels
The filter is WHITE
There are 42 detected source(s) for 811074_g2970
Aspect correction adds 0.00081 degrees (0.195 sec of time = 0.86 arc sec) to RA
Aspect correction adds 0.00036 degrees ( 1.29 arcsec) to Dec
Total aspect correction is 1.55 arcsec
Star catalogs centered at 326.7501 , -72.8590 with radius 6.20 arc min.
n_usno: 418 n_gsc: 421
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 10.88978
RA DEC Mag Color
bright star 0: 326.69574 (21:46:46.98) -72.87591 (-72:52:33.3) 11.52 USNO-V
bright star 1: 326.51200 (21:46:02.88) -72.91645 (-72:54:59.2) 10.89 USNO-V
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 34 matched entries is 0.611" for 811074_g2970
Mean and std. dev of mag. difference (MAG_DELTA) are 1.272 and 0.300 for 811074_g2970
Found 8 entries without IDs and 4 entries that are acceptable afterglow candidates for 811074_g2970.
Acceptable entries have no ID, BAT distance < 200" or XRT distance < 10", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
2 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=326.7720 (21:47:05.28) DEC=-72.8680 (-72:52:04.8)
XRT distances are as reported in catalog file.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 811074_g2970 with 5x5 stamp
ra=326.77213 (21:47:05.31) dec=-72.85769 (-72:51:27.7) +/- 1.1" mag=19.13+/-0.35
dist=37.1 REFID=37
src: 0 distr. of nearby unmatched sources: 0 0 0 0 0
Found 2 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
326.7904 -72.8565 19.8 -1 USNO-B1 99.99 20.85 99.99
326.7762 -72.8584 5.1 -1 GSC2.3 20.56 99.99 99.99
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
-----------------
Entry 3 in the list of sources is a candidate afterglow for 811074_g2970 with 5x5 stamp
ra=326.84223 (21:47:22.14) dec=-72.86971 (-72:52:10.9) +/- 1.1" mag=19.02+/-0.35
dist=74.7 REFID=39
src: 3 distr. of nearby unmatched sources: 0 0 0 0 1
Found 1 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
326.8369 -72.8725 11.6 -1 GSC2.3 99.99 22.11 99.99
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
-----------------
Entry 10 in the list of sources is a candidate afterglow for 811074_g2970 with 5x5 stamp
ra=326.80693 (21:47:13.66) dec=-72.90166 (-72:54:06.0) +/- 1.1" mag=19.01+/-0.35
dist=126.7 REFID=40
src: 10 distr. of nearby unmatched sources: 0 0 0 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
326.8136 -72.9005 8.2 -1 USNO-B1 21.52 20.14 20.75
326.8133 -72.9007 7.6 -1 USNO-B1 20.84 19.99 20.37
326.8066 -72.9030 4.7 -1 USNO-B1 20.57 19.41 19.92
326.8134 -72.9007 7.7 -1 GSC2.3 19.76 21.91 99.99
326.8062 -72.9031 5.2 -1 GSC2.3 19.21 20.87 99.99
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
-----------------
Entry 13 in the list of sources is a candidate afterglow for 811074_g2970 with 5x5 stamp
ra=326.64471 (21:46:34.73) dec=-72.89131 (-72:53:28.7) +/- 1.1" mag=19.05+/-0.35
dist=158.8 REFID=42
src: 13 distr. of nearby unmatched sources: 0 0 0 0 0
Found 1 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
326.6555 -72.8926 12.4 -1 GSC2.3 99.99 21.81 99.99
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
separation of 0 and 3 is 86.0 arc sec
separation of 0 and 10 is 162.5 arc sec
separation of 0 and 13 is 181.5 arc sec
separation of 3 and 10 is 121.0 arc sec
separation of 3 and 13 is 223.4 arc sec
separation of 10 and 13 is 175.7 arc sec
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 18.66, BAT distances < 200",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
srclist paragraph message for exposure 1 of trigger 811074
------ Start for Possible Stand-alone Circular ----
In response to GRB180221 (Swift/BAT trigger 811074) at 06:30:44 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 2950 seconds after the BAT trigger. No credible afterglow candidate
has been found in the initial data products. Data 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 BAT error circle. The list of sources is
typically complete to about 18 mag. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.05.
------- notes for trigger 811074 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180221d07h29m08s231627usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=811074
-expid=540890415 -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/811074/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
No XRT position found for srclist. BAT position found.
UVOT exposure began at MET 540890415.601 or about 2018:052:07:20:10 UT
Found 420 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 7% of the srclist region. Found 42 sources in
srclist catalog. Found 8 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.66 mag.
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?
540890415 2949 WHITE 326.80693 -72.90166 19.01/18.7 126.7 srclist Yes
540890415 2949 WHITE 326.84223 -72.86971 19.02/18.7 74.7 srclist Yes
540890415 2949 WHITE 326.64471 -72.89131 19.05/18.7 158.8 srclist Yes
540890415 2949 WHITE 326.77213 -72.85769 19.13/18.7 37.1 srclist Yes
540890415 2949 ? image data are not available.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: -72.86800
GRB_ERROR: 200
GRB_RA: 326.77200
IMAGE_START_TIME: 07:20:10
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: BAT