srclist overlap message for exposure 2 of trigger 886486
uvot_overlap.pl vrs. 2010-12-20b fem started at 190129d09h39m24s973794usUT
The observation of trigger 886486 started 2019-01-29T09:25:26.0
Examining file 886486_g316_uvot_sky_srclist.fits
The exposure ID is 570446726
The exposure time is undefined.
The filter is U.
The uvot region is centered at (247.8128,-47.8038) with a roll angle of 83.1
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 (247.7180,-47.8070) with a radius of 3.000 arc min
This is 3.824 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 16.38 sq. arc min or 0.58 of the BAT error circle
The XRT error circle is centered at (247.8086,-47.8071) with a radius of 0.087 arc min
This is 0.261 arc min from the center of the uvot region
The area of the XRT error circle is 0.024 sq. arc min
The UVOT/XRT overlap is 0.024 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 2 of trigger 886486
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190129d09h39m26s077908usUT
Observation start time is 2019-01-29T09:25:26.0
Examining file 886486_g316_uvot_catalog_srclist.fits
The exposure ID is 570446726
The exposure is 250.000 sec.
The bin size is 2 pixels
The filter is U
There are 70 detected source(s) for 886486_g316
Aspect correction adds 0.00193 degrees (0.464 sec of time = 4.67 arc sec) to RA
Aspect correction adds -0.00109 degrees (-3.94 arcsec) to Dec
Total aspect correction is 6.11 arcsec
Star catalogs centered at 247.8129 , -47.8027 with radius 6.32 arc min.
n_usno: 2515 n_gsc: 0
*** WARNING -- bright star catalog has 5 entries brighter than 12 mag
The brightest has mag 10.952
RA DEC Mag Color
bright star 0: 247.76332 (16:31:03.20) -47.79031 (-47:47:25.1) 11.64 USNO-V
bright star 1: 247.75635 (16:31:01.52) -47.75292 (-47:45:10.5) 11.55 USNO-V
bright star 2: 247.91489 (16:31:39.57) -47.80216 (-47:48:07.8) 10.95 USNO-V
bright star 3: 247.69070 (16:30:45.77) -47.82853 (-47:49:42.7) 11.89 USNO-V
bright star 4: 247.91860 (16:31:40.46) -47.87062 (-47:52:14.2) 11.43 USNO-V
Mean distance difference (CAT_DELTA) for 65 matched entries is 0.841" for 886486_g316
Mean and std. dev of mag. difference (MAG_DELTA) are 3.032 and 0.751 for 886486_g316
Found 10 entries without IDs and 1 entries that are acceptable afterglow candidates for 886486_g316.
Acceptable entries have no ID, XRT distances < 13", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
5 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=247.7180 (16:30:52.32) DEC=-47.8070 (-47:48:25.2)
XRT distances are from RA=247.8086 (16:31:14.06) DEC=-47.8071 (-47:48:25.6)
-----------------
Entry 20 in the list of sources is a candidate afterglow for 886486_g316 with 3x3 stamp
ra=247.75937 (16:31:02.25) dec=-47.78483 (-47:47:05.4) +/- 1.1" mag=18.92+/-0.35
dist=143.5 REFID=68
*** The position of this source is inconsistent with the XRT position.
The position is 128.0 arc sec from the BAT position.
src: 20 distr. of nearby unmatched sources: 0 0 0 0 0
Found 9 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
247.7668 -47.7825 19.7 -1 USNO-B1 19.74 17.25 18.36
247.7620 -47.7864 8.4 -1 USNO-B1 17.88 15.99 16.83
247.7641 -47.7833 12.7 -1 USNO-B1 18.12 16.56 17.25
247.7618 -47.7862 7.6 -1 USNO-B1 17.66 99.99 99.99
247.7607 -47.7858 4.8 -1 USNO-B1 19.49 16.11 17.61
247.7594 -47.7857 3.2 -1 USNO-B1 16.82 15.48 16.07 *
247.7591 -47.7840 3.2 -1 USNO-B1 15.28 14.07 14.60 *
247.7543 -47.7856 12.5 -1 USNO-B1 17.50 17.33 17.40
247.7556 -47.7808 17.0 -1 USNO-B1 19.71 17.59 18.53
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 0 entries in star catalog(s) within 10" of the XRT position.
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 < 13",
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 2 of trigger 886486
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no image afterglow info
SRCLIST PROBLEM: high density of stars
See notes for more details.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB190129 (Swift/BAT trigger 886486) at 09:20:09 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 110 seconds with the U filter starting
294 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. Because of the density of
catalogued stars, further analysis is required to report an upper limit for any
afterglow in the region. No correction has been made for the large, but
uncertain, extinction expected.
------- notes for trigger 886486 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190129d09h39m33s499552usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=886486
-expid=570446726 -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/886486/
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.
*** Warning -- BAT and XRT error circles do NOT overlap.
UVOT exposure began at MET 570446726.01686 or about 2019:029:09:25:21 UT
Found 2511 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 43% of the srclist region. Found 70 sources in
srclist catalog. Found 10 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= 247.8056 dec= -47.8189 mag=17.86 sep=43.07".
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?
570446726 294 U srclist found no candidates.
570446726 294 U image data are not available.
List afterglow candidates for other finding charts.
570446567 135 WHITE srclist found no candidates.
570446567 135 WHITE image found no candidates.
------- Tokens for Quick GCN -------