image overlap message for exposure 1 of trigger 808755
uvot_overlap.pl vrs. 2010-12-20b fem started at 180205d19h45m50s751702usUT
The observation of trigger 808755 started 2018-02-05T19:29:12.0
Examining file ./808755_g120_uvot_sky_image.fits
The exposure ID is 539551752
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (251.7540,-45.8481) with a roll angle of 85.3
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 (251.7490,-45.8500) with a radius of 3.000 arc min
This is 0.237 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 (251.7923,-45.8713) with a radius of 0.035 arc min
This is 2.118 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 0.000 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 808755
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180205d19h46m01s520581usUT
Observation start time is 2018-02-05T19:29:12.0
Examining file ./808755_g120_uvot_catalog_image.fits
The exposure ID is 539551752
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 30 detected source(s) for 808755_g120
Aspect correction adds 0.00011 degrees (0.026 sec of time = 0.28 arc sec) to RA
Aspect correction adds 0.00045 degrees ( 1.62 arcsec) to Dec
Total aspect correction is 1.64 arcsec
Star catalogs centered at 251.7520 , -45.8455 with radius 2.56 arc min.
n_usno: 395 n_gsc: 926
*** WARNING -- bright star catalog has 5 entries brighter than 12 mag
The brightest has mag 10.545
RA DEC Mag Color
bright star 0: 251.76442 (16:47:03.46) -45.84649 (-45:50:47.4) 11.22 USNO-R
bright star 1: 251.75658 (16:47:01.58) -45.86180 (-45:51:42.5) 10.54 USNO-R
bright star 2: 251.75587 (16:47:01.41) -45.84358 (-45:50:36.9) 11.96 GSC-F
bright star 3: 251.76324 (16:47:03.18) -45.84789 (-45:50:52.4) 11.88 GSC-F
bright star 4: 251.71933 (16:46:52.64) -45.87579 (-45:52:32.8) 11.93 GSC-F
Mean distance difference (CAT_DELTA) for 22 matched entries is 0.825" for 808755_g120
Mean and std. dev of mag. difference (MAG_DELTA) are 2.832 and 1.370 for 808755_g120
Found 8 entries without IDs and 4 entries that are acceptable afterglow candidates for 808755_g120.
Acceptable entries have no ID, XRT distances < 5.25", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
4 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=251.7490 (16:46:59.76) DEC=-45.8500 (-45:51:00.0)
XRT distances are from RA=251.7923 (16:47:10.15) DEC=-45.8713 (-45:52:16.5)
*** WARNING 26 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 808755_g120 with genie
ra=251.74816 (16:46:59.56) dec=-45.84731 (-45:50:50.3) +/- 0.7" mag=18.11+/-0.16
dist=140.3 REFID=17 major=0.9 minor=0.8 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 9.9 arc sec from the BAT position.
Found 15 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
251.7525 -45.8480 11.1 -1 USNO-B1 17.77 14.63 16.02
251.7488 -45.8472 1.6 -1 USNO-B1 16.03 13.94 14.87 *
251.7489 -45.8498 9.1 -1 USNO-B1 17.98 16.80 17.33
251.7535 -45.8506 17.9 -1 USNO-B1 99.99 17.26 99.99
251.7419 -45.8449 18.0 -1 USNO-B1 16.94 15.76 16.28
251.7513 -45.8453 10.8 -1 GSC2.3 17.91 21.57 99.99
251.7524 -45.8482 11.1 -1 GSC2.3 14.93 18.57 99.99
251.7483 -45.8473 0.4 -1 GSC2.3 13.74 16.39 99.99 *
251.7475 -45.8438 12.9 -1 GSC2.3 17.59 99.99 99.99
251.7486 -45.8498 9.1 -1 GSC2.3 16.76 18.95 99.99
251.7531 -45.8505 17.0 -1 GSC2.3 17.39 99.99 99.99
251.7462 -45.8497 10.0 -1 GSC2.3 17.99 99.99 99.99
251.7427 -45.8472 13.7 -1 GSC2.3 99.99 21.49 99.99
251.7417 -45.8449 18.2 -1 GSC2.3 15.99 17.63 99.99
251.7426 -45.8491 15.4 -1 GSC2.3 17.82 99.99 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 1 in the list of sources is a candidate afterglow for 808755_g120 with genie
ra=251.75388 (16:47:00.93) dec=-45.85410 (-45:51:14.7) +/- 0.6" mag=17.86+/-0.16
dist=114.4 REFID=20 major=1.1 minor=1.0 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 19.2 arc sec from the BAT position.
Found 13 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
251.7489 -45.8498 20.0 -1 USNO-B1 17.98 16.80 17.33
251.7535 -45.8506 12.5 -1 USNO-B1 99.99 17.26 99.99
251.7537 -45.8536 1.8 -1 USNO-B1 15.82 12.62 14.04 *
251.7603 -45.8529 16.6 -1 USNO-B1 18.92 12.72 15.47
251.7518 -45.8587 17.4 -1 USNO-B1 19.74 16.24 17.79
251.7531 -45.8505 13.0 -1 GSC2.3 17.39 99.99 99.99
251.7567 -45.8505 14.8 -1 GSC2.3 99.99 21.01 99.99
251.7506 -45.8527 9.6 -1 GSC2.3 17.46 99.99 99.99
251.7536 -45.8539 0.8 -1 GSC2.3 13.74 16.21 99.99 *
251.7601 -45.8532 16.0 -1 GSC2.3 13.91 19.44 99.99
251.7495 -45.8572 15.5 -1 GSC2.3 17.63 99.99 99.99
251.7583 -45.8577 17.2 -1 GSC2.3 14.80 20.76 99.99
251.7514 -45.8588 18.0 -1 GSC2.3 16.63 21.50 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 16 in the list of sources is a candidate afterglow for 808755_g120 with genie
ra=251.77244 (16:47:05.39) dec=-45.84331 (-45:50:35.9) +/- 0.9" mag=19.57+/-0.26
dist=112.2 REFID=15 major=0.9 minor=0.7 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 63.5 arc sec from the BAT position.
Found 19 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
251.7649 -45.8442 19.2 -1 USNO-B1 17.40 15.16 16.15
251.7670 -45.8468 18.7 -1 USNO-B1 17.46 11.15 13.95 *
251.7700 -45.8404 11.9 -1 USNO-B1 16.31 11.26 13.50 *
251.7737 -45.8458 9.7 -1 USNO-B1 18.91 14.34 16.37
251.7742 -45.8436 4.6 -1 USNO-B1 19.55 13.01 15.91
251.7774 -45.8451 13.9 -1 USNO-B1 17.86 12.15 14.69
251.7768 -45.8407 14.4 -1 USNO-B1 17.96 13.09 15.25
251.7654 -45.8450 18.7 -1 GSC2.3 12.23 17.80 99.99
251.7672 -45.8468 18.3 -1 GSC2.3 12.94 18.19 99.99
251.7671 -45.8421 14.1 -1 GSC2.3 14.40 20.43 99.99
251.7692 -45.8442 8.7 -1 GSC2.3 13.86 18.81 99.99
251.7700 -45.8403 12.3 -1 GSC2.3 12.50 16.85 99.99
251.7715 -45.8449 6.1 -1 GSC2.3 99.99 21.20 99.99
251.7711 -45.8485 19.0 -1 GSC2.3 99.99 22.21 99.99
251.7726 -45.8435 0.9 -1 GSC2.3 12.37 18.67 99.99 *
251.7739 -45.8471 14.3 -1 GSC2.3 13.86 20.11 99.99
251.7739 -45.8426 4.5 -1 GSC2.3 99.99 20.94 99.99
251.7774 -45.8450 13.9 -1 GSC2.3 13.05 18.70 99.99
251.7765 -45.8405 14.4 -1 GSC2.3 14.04 18.99 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 24 in the list of sources is a candidate afterglow for 808755_g120 with genie
ra=251.73472 (16:46:56.33) dec=-45.82819 (-45:49:41.5) +/- 0.8" mag=19.16+/-0.21
dist=211.9 REFID=6 major=0.8 minor=0.6 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 86.3 arc sec from the BAT position.
This source is near the edge of image (0.917)
Found 17 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
251.7340 -45.8331 17.8 -1 USNO-B1 18.61 17.17 17.81
251.7388 -45.8277 10.4 -1 USNO-B1 18.92 17.65 18.21
251.7351 -45.8278 1.6 -1 USNO-B1 15.06 12.63 13.71 *
251.7367 -45.8256 10.5 -1 USNO-B1 16.96 14.71 15.71
251.7380 -45.8239 17.4 -1 USNO-B1 18.68 17.57 18.06
251.7337 -45.8332 18.4 -1 GSC2.3 17.47 19.62 99.99
251.7405 -45.8294 15.2 -1 GSC2.3 17.88 99.99 99.99
251.7361 -45.8312 11.4 -1 GSC2.3 19.89 22.19 99.99
251.7424 -45.8282 19.3 -1 GSC2.3 20.09 21.91 99.99
251.7309 -45.8323 17.7 -1 GSC2.3 19.22 21.32 99.99
251.7387 -45.8276 10.3 -1 GSC2.3 17.76 20.10 99.99
251.7415 -45.8267 17.8 -1 GSC2.3 17.95 20.88 99.99
251.7300 -45.8321 18.4 -1 GSC2.3 99.99 21.97 99.99
251.7348 -45.8280 0.6 -1 GSC2.3 12.77 15.32 99.99 *
251.7367 -45.8255 10.8 -1 GSC2.3 16.14 17.35 99.99
251.7377 -45.8239 17.1 -1 GSC2.3 17.57 99.99 99.99
251.7379 -45.8238 17.5 -1 GSC2.3 17.54 19.47 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" or brighter than 12 mag
Found 6 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
251.7889 -45.8700 9.7 -1 USNO-B1 18.89 17.82 18.30
251.7934 -45.8697 6.2 -1 USNO-B1 16.71 14.81 15.65
251.7951 -45.8705 7.5 -1 USNO-B1 18.83 17.64 18.17
251.7888 -45.8700 9.9 -1 GSC2.3 17.86 20.09 99.99
251.7926 -45.8702 3.9 -1 GSC2.3 15.80 17.71 99.99
251.7950 -45.8706 7.3 -1 GSC2.3 18.27 20.26 99.99
The closest star is 3.87" away.
List UVOT sources within 10" of the XRT position:
There are 41094.832 counts in the bkg source region of 5486.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 7.491 counts/pixel (5-sig UL in 4" is 19.37 mag) for 808755_g120
Do not compute counts in XRT region because position is too far from center.
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 19.93, XRT distances < 5.25",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 808755_539551752_180205d19h46m01s520581usUT_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(251.7540,-45.8481,45")
fk5;-circle(251.748155853284,-45.8473146799793,6")
fk5;-circle(251.753876356091,-45.8540952717028,6")
fk5;-circle(251.759306314618,-45.8490100563984,6")
fk5;-circle(251.755847961516,-45.8436184007705,6")
fk5;-circle(251.738621907748,-45.8437123469857,6")
fk5;-circle(251.737260330946,-45.8554071453762,6")
fk5;-circle(251.752869240058,-45.839061896542,6")
fk5;-circle(251.76532331884,-45.8453519852621,6")
fk5;-circle(251.765256636902,-45.8372958187996,6")
fk5;-circle(251.769971885596,-45.8401751774303,6")
fk5;-circle(251.772442777332,-45.8433058700479,6")
image paragraph message for exposure 1 of trigger 808755
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no overlap
SRCLIST PROBLEM: high density of stars, srclist filled telemetry buffer
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 GRB180205 (Swift/BAT trigger 808755) at 19:27:11 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting 99
seconds after the BAT trigger. No credible afterglow candidate has been found
in the initial data products. The 2.7'x2.7' sub-image covers none of the XRT
error circle. 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 808755 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180205d19h46m16s927532usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=808755
-expid=539551752 -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/808755/
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. XRT position found for Genie
image. BAT position found.
UVOT exposure began at MET 539551752.01746 or about 2018:036:19:29:07 UT
Found 4790 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 42% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 59 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.12 mag.
Found 30 source(s) in Genie image catalog. Found 8 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 19.93 mag. Found 558 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
59% of the Genie image region.
Genie image analysis:
Found 41094.8 counts in the large background region of 5486.0 pixels or a rate
of 7.491 counts/pixel in a radius of 45.0 arcsec. Based on this background, the
typical 5-sigma UL at a random point in the Genie image is 19.41 mag. for a
4-arcsec aperture. The number of srclist sources filled the available
telemetry. The weakest source detected was 17.95 mag. The closest srclist
source has ra= 251.7946 dec= -45.8808 mag=17.49 sep=34.84". The closest Genie
source has ra= 251.7780 dec= -45.8591 mag=17.69 sep=56.42".
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?
539551752 99 U srclist found no candidates.
539551752 99 U image found no candidates.
List afterglow candidates for other finding charts.
539552508 855 U srclist found no candidates.
539552508 855 ? image data are not available.
------- Tokens for Quick GCN -------