image overlap message for exposure 1 of trigger 1032024
uvot_overlap.pl vrs. 2010-12-20b fem started at 210211d13h49m58s201749usUT
The observation of trigger 1032024 started 2021-02-11T08:45:02.3
Examining file ./1032024_g103_uvot_sky_image.fits
The exposure ID is 634725902
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (269.4419,-46.2984) with a roll angle of 74.1
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 (269.4330,-46.2990) with a radius of 3.000 arc min
This is 0.372 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 (269.4398,-46.2673) with a radius of 0.040 arc min
This is 1.870 arc min from the center of the uvot region
The area of the XRT error circle is 0.005 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 1032024
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210211d13h50m08s307888usUT
Observation start time is 2021-02-11T08:45:02.3
Examining file ./1032024_g103_uvot_catalog_image.fits
The exposure ID is 634725902
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 43 detected source(s) for 1032024_g103
Aspect correction adds 0.00144 degrees (0.345 sec of time = 3.57 arc sec) to RA
Aspect correction adds -0.00009 degrees (-0.32 arcsec) to Dec
Total aspect correction is 3.59 arcsec
Star catalogs centered at 269.4397 , -46.2955 with radius 2.67 arc min.
n_usno: 554 n_gsc: 0
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 10.58758
RA DEC Mag Color
bright star 0: 269.48034 (17:57:55.28) -46.29205 (-46:17:31.4) 10.59 USNO-V
bright star 1: 269.46680 (17:57:52.03) -46.32976 (-46:19:47.1) 11.18 USNO-R
Mean distance difference (CAT_DELTA) for 47 matched entries is 0.530" for 1032024_g103
Mean and std. dev of mag. difference (MAG_DELTA) are 1.199 and 0.693 for 1032024_g103
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1032024_g103.
Acceptable entries have no ID, XRT distances < 6", 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=269.4330 (17:57:43.92) DEC=-46.2990 (-46:17:56.4)
XRT distances are from RA=269.4398 (17:57:45.54) DEC=-46.2673 (-46:16:02.3)
-----------------
Entry 32 in the list of sources is a candidate afterglow for 1032024_g103 with genie
ra=269.43954 (17:57:45.49) dec=-46.28077 (-46:16:50.8) +/- 0.6" mag=18.56+/-0.16
dist=48.5 REFID=6 major=1.3 minor=1.0 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 67.6 arc sec from the BAT position.
Found 8 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
269.4408 -46.2850 15.4 -1 USNO-B1 19.78 18.02 18.80
269.4348 -46.2838 16.0 -1 USNO-B1 16.48 15.73 16.07
269.4422 -46.2821 8.1 -1 USNO-B1 15.94 15.02 15.43
269.4400 -46.2802 2.2 -1 USNO-B1 99.99 16.21 99.99 *
269.4397 -46.2800 3.0 -1 USNO-B1 16.71 16.96 16.85 *
269.4319 -46.2796 19.4 -1 USNO-B1 20.48 18.09 19.15
269.4446 -46.2786 14.8 -1 USNO-B1 20.13 19.57 19.82
269.4340 -46.2780 16.9 -1 USNO-B1 15.80 14.63 15.15
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
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
269.4410 -46.2663 4.8 -1 USNO-B1 19.94 20.30 20.14
269.4375 -46.2657 8.2 -1 USNO-B1 19.23 16.55 17.74
The closest star is 4.84" away.
List UVOT sources within 10" of the XRT position:
There are 1.7582611E+05 counts in the bkg source region of 4985.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 35.271 counts/pixel (5-sig UL in 4" is 19.42 mag) for 1032024_g103
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 19.97, XRT distances < 6",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1032024_634725902_210211d13h50m08s307888usUT_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(269.4419,-46.2984,45")
fk5;-circle(269.433765192167,-46.2996081919122,6")
fk5;-circle(269.431077834134,-46.2967491736278,6")
fk5;-circle(269.428355852922,-46.3021649287403,6")
fk5;-circle(269.439698273257,-46.2954491514978,6")
fk5;-circle(269.442780592454,-46.2974309456717,6")
fk5;-circle(269.423285036699,-46.2934447464245,6")
fk5;-circle(269.447704570329,-46.3014320865329,6")
fk5;-circle(269.448181665001,-46.2969929232475,6")
fk5;-circle(269.449366759211,-46.3070037009819,6")
fk5;-circle(269.453693884218,-46.3029793576776,6")
fk5;-circle(269.454607838074,-46.2942328411089,6")
fk5;-circle(269.449723556809,-46.3096742089722,6")
fk5;-circle(269.451327604748,-46.2889081831668,6")
fk5;-circle(269.454298281389,-46.308366235114,6")
fk5;-circle(269.460010158023,-46.2950271788801,6")
image paragraph message for exposure 1 of trigger 1032024
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.
------ Start for Possible Stand-alone Circular ----
In response to GRB210211 (Swift/BAT trigger 1032024) at 08:43:18 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 77 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 expected
extinction corresponding to E(B-V) of 0.127.
------- notes for trigger 1032024 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210211d13h50m12s972437usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1032024
-expid=634725902 -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/1032024/
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 634725902.2551 or about 2021:042:08:44:57 UT
Found 2747 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 53% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 26 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 19.22 mag.
Found 43 source(s) in Genie image catalog. Found 1 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 19.97 mag. Found 550 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
53% of the Genie image region.
Genie image analysis:
Found 175826.1 counts in the large background region of 4985.0 pixels or a rate
of 35.271 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 19.24 mag. for a
4-arcsec aperture. The number of srclist sources filled the available
telemetry. The weakest source detected was 18.58 mag. The closest srclist
source has ra= 269.4412 dec= -46.2707 mag=17.80 sep=12.72". The closest Genie
source has ra= 269.4341 dec= -46.2780 mag=16.36 sep=40.88".
This paragraph is only useful if the XRT position is grossly wrong. There are 1
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=269.41222
(17:57:38.93), DEC=-46.32112 (-46:19:16.0) (J2000). It has a mag of 17.82. It
is 94.9" 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 77 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 17:57:38.93 = 269.41222
DEC(J2000) = -46:19:16.0 = -46.32112
with a 90%-confidence error radius of about 1.10 arc sec. The estimated
magnitude is 17.82 with a 1-sigma error of about 0.35. No correction has been
made for the expected extinction corresponding to E(B-V) of 0.127.
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?
634725902 77 WHITE srclist found no candidates.
634725902 77 WHITE image found no candidates.
List afterglow candidates for other finding charts.
634726114 289 U srclist found no candidates.
634726114 289 U image found no candidates.
------- Tokens for Quick GCN -------