image overlap message for exposure 1 of trigger 924641
uvot_overlap.pl vrs. 2010-12-20b fem started at 190910d07h10m34s181526usUT
The observation of trigger 924641 started 2019-09-10T07:04:38.0
Examining file 924641_g127_uvot_sky_image.fits
The exposure ID is 589791877
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (272.0271,13.2489) with a roll angle of 278.2
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 (272.0700,13.2580) with a radius of 3.000 arc min
This is 2.564 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 4.47 sq. arc min or 0.16 of the BAT error circle
The XRT error circle is centered at (272.0331,13.2514) with a radius of 0.092 arc min
This is 0.382 arc min from the center of the uvot region
The area of the XRT error circle is 0.026 sq. arc min
The UVOT/XRT overlap is 0.026 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 924641
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190910d07h10m36s084361usUT
Observation start time is 2019-09-10T07:04:38.0
Examining file 924641_g127_uvot_catalog_image.fits
The exposure ID is 589791877
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 45 detected source(s) for 924641_g127
Aspect correction adds -0.00156 degrees (-0.374 sec of time = -5.46 arc sec) to RA
Aspect correction adds -0.00008 degrees (-0.30 arcsec) to Dec
Total aspect correction is 5.46 arcsec
Star catalogs centered at 272.0277 , 13.2492 with radius 2.58 arc min.
n_usno: 232 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.90866
RA DEC Mag Color
bright star 0: 272.03770 (18:08:09.05) 13.20838 (+13:12:30.2) 11.91 USNO-V
Mean distance difference (CAT_DELTA) for 45 matched entries is 0.479" for 924641_g127
Mean and std. dev of mag. difference (MAG_DELTA) are 1.399 and 0.415 for 924641_g127
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 924641_g127.
Acceptable entries have no ID, XRT distances < 13.75", 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=272.0700 (18:08:16.80) DEC=13.2580 (+13:15:28.8)
XRT distances are from RA=272.0331 (18:08:07.94) DEC=13.2514 (+13:15:05.0)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 924641_g127 with genie
ra=272.03143 (18:08:07.54) dec=13.25159 (+13:15:05.7) +/- 0.6" mag=16.17+/-0.14
dist=5.9 REFID=20 major=1.0 minor=1.0 flag=0
Found 5 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
272.0290 13.2472 17.9 -1 USNO-B1 20.51 18.96 19.65
272.0269 13.2519 15.9 -1 USNO-B1 18.66 19.11 18.91
272.0273 13.2541 17.2 -1 USNO-B1 20.23 19.08 19.59
272.0299 13.2546 12.0 -1 USNO-B1 17.02 16.11 16.51
272.0322 13.2536 7.8 -1 USNO-B1 19.34 18.41 18.82
uvot_check_outside found 12 of 12 good pixels
##### This source remains a candidate #####
It has no entries within 3.5" or brighter than 12 mag
Found 1 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
272.0322 13.2536 8.5 -1 USNO-B1 19.34 18.41 18.82
The closest star is 8.49" away.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=272.03143 (18:08:07.54) dec=13.25159 (+13:15:05.7) +/- 0.6" mag=16.17+/-0.14 dist=5.9 REFID=20 flag=0
There are 42493.879 counts in the bkg source region of 4867.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 8.731 counts/pixel (5-sig UL in 4" is 20.17 mag) for 924641_g127
There are 4319.3643 counts in the src source region of 50.000000 pixels.
Rate in src region with 4 arcsec radius is 86.387 counts/pixel for 924641_g127
There are 8701.9111 counts in the cand_src_bkg source region of 1019.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 8.540 counts/pixel (5-sig UL in 4" is 20.19 mag) for 924641_g127
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 20.73, XRT distances < 13.75",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
Region file: 924641_589791877_190910d07h10m36s084361usUT_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(272.0271,13.2489,45")
fk5;-circle(272.031434153578,13.2515868998753,6")
fk5;-circle(272.033263821232,13.2464346726136,6")
fk5;-circle(272.029890414685,13.2545691585486,6")
fk5;-circle(272.035098273999,13.2451861067728,6")
fk5;-circle(272.034142023031,13.257812443756,6")
fk5;-circle(272.041055375056,13.2510553434115,6")
fk5;-circle(272.030739901831,13.2592594339026,6")
fk5;-circle(272.038040825532,13.2428934915355,6")
fk5;-circle(272.031298039432,13.2604163543146,6")
fk5;-circle(272.023085618555,13.2431896455026,6")
fk5;-circle(272.020018994369,13.2542815608003,6")
fk5;-circle(272.019553726092,13.2515276259495,6")
fk5;-circle(272.022709944949,13.2594899011035,6")
fk5;-circle(272.021497502253,13.2426591457376,6")
fk5;-circle(272.031973335075,13.2360880157067,6")
fk5;-circle(272.016731913444,13.2498152487309,6")
fk5;-circle(272.014747424831,13.2495816277093,6")
fk5;-circle(272.015874071569,13.2437639204635,6")
Region file: 924641_589791877_190910d07h10m36s084361usUT_cand_src.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(272.031434153578,13.2515868998753,4")
Region file: 924641_589791877_190910d07h10m36s084361usUT_cand_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(272.031434153578,13.2515868998753,25")
fk5;-circle(272.031434153578,13.2515868998753,15")
fk5;-circle(272.033263821232,13.2464346726136,6")
fk5;-circle(272.029890414685,13.2545691585486,6")
fk5;-circle(272.035098273999,13.2451861067728,6")
fk5;-circle(272.034142023031,13.257812443756,6")
fk5;-circle(272.030739901831,13.2592594339026,6")
image paragraph message for exposure 1 of trigger 924641
------ Start for Possible Stand-alone Circular ----
In response to GRB190910 (Swift/BAT trigger 924641) at 07:02:29 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 105 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 18:08:07.54 = 272.03143
DEC(J2000) = +13:15:05.7 = 13.25159
with a 90%-confidence error radius of about 0.61 arc sec. This position is 5.9
arc sec. from the center of the XRT error circle. The estimated magnitude is
16.17 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.15.
------- notes for trigger 924641 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190910d07h10m40s734113usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=924641
-expid=589791877 -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/924641/
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 589791877.97756 or about 2019:253:07:04:32 UT
Found 1449 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 24% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 17 srclist
source(s) without IDs. There are 1 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 19.22 mag.
Found 45 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 1 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.73 mag. Found 228 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 23% of the Genie image region.
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?
589791877 104 WHITE 272.03134 13.25146 17.00/19.2 6.2 srclist Yes
589791877 104 WHITE 272.03143 13.25159 16.17/20.7 5.9 image Yes
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 13.25159
GRB_ERROR: 0.61
GRB_RA: 272.03143
IMAGE_START_TIME: 07:04:32
MAGNITUDE: 16.17
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT