image overlap message for exposure 1 of trigger 1270788
uvot_overlap.pl vrs. 2010-12-20b fem started at 241128d08h00m12s682978usUT
The observation of trigger 1270788 started 2024-11-27T21:51:54.9
Examining file ./1270788_g517_uvot_sky_image.fits
The exposure ID is 754437114
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (327.9101,-56.6868) with a roll angle of 263.0
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 (327.9220,-56.6850) with a radius of 3.000 arc min
This is 0.407 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 (327.8854,-56.6654) with a radius of 0.035 arc min
This is 1.520 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 0.004 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1270788
find_uvot_ag.pl vrs. 2023-04-25a fem started at 241128d08h00m13s468711usUT
Observation start time is 2024-11-27T21:51:54.9
Examining file ./1270788_g517_uvot_catalog_image.fits
The exposure ID is 754437114
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 17 detected source(s) for 1270788_g517
Aspect correction adds -0.00067 degrees (-0.161 sec of time = -1.33 arc sec) to RA
Aspect correction adds 0.00009 degrees ( 0.32 arcsec) to Dec
Total aspect correction is 1.37 arcsec
Star catalogs centered at 327.9058 , -56.6808 with radius 2.96 arc min.
n_usno: 237 n_gsc: 146
*** WARNING -- bright star catalog has 3 entries brighter than 12 mag
The brightest has mag 11.52288
RA DEC Mag Color
bright star 0: 327.89596 (21:51:35.03) -56.70769 (-56:42:27.7) 11.77 USNO-V
bright star 1: 327.97790 (21:51:54.70) -56.70624 (-56:42:22.4) 11.52 USNO-V
bright star 2: 327.86118 (21:51:26.68) -56.71400 (-56:42:50.4) 11.65 GSC-F
Mean distance difference (CAT_DELTA) for 18 matched entries is 0.925" for 1270788_g517
Mean and std. dev of mag. difference (MAG_DELTA) are 1.310 and 1.013 for 1270788_g517
Found 3 entries without IDs and 1 entries that are acceptable afterglow candidates for 1270788_g517.
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.
2 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=327.9220 (21:51:41.28) DEC=-56.6850 (-56:41:06.0)
XRT distances are from RA=327.8854 (21:51:32.50) DEC=-56.6654 (-56:39:55.6)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1270788_g517 with genie
ra=327.88467 (21:51:32.32) dec=-56.66531 (-56:39:55.1) +/- 0.6" mag=17.14+/-0.14
dist=1.6 REFID=16 major=0.9 minor=0.8 flag=0
This source is near the edge of image (0.946)
Found 4 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
327.8880 -56.6686 13.6 -1 USNO-B1 20.71 21.17 20.97
327.8801 -56.6660 9.3 -1 USNO-B1 99.99 24.27 99.99
327.8807 -56.6639 9.3 -1 USNO-B1 23.07 21.73 22.32
327.8774 -56.6615 20.0 -1 USNO-B1 20.89 20.10 20.45
uvot_check_outside found 12 of 12 good pixels
##### This source remains a candidate #####
It has no entries within 5.25" or brighter than 12 mag
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=327.88467 (21:51:32.32) dec=-56.66531 (-56:39:55.1) +/- 0.6" mag=17.14+/-0.14 dist=1.6 REFID=16 flag=0
There are 49952.918 counts in the bkg source region of 5681.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 8.793 counts/pixel (5-sig UL in 4" is 20.17 mag) for 1270788_g517
There are 2404.4583 counts in the src source region of 51.000000 pixels.
Rate in src region with 4 arcsec radius is 47.146 counts/pixel for 1270788_g517
source too far from center -- do not compute local background.
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 20.72, XRT distances < 5.25",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
Region file: 1270788_754437114_241128d08h00m13s468711usUT_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(327.9101,-56.6868,45")
fk5;-circle(327.895126749443,-56.6887853416946,6")
fk5;-circle(327.907670946521,-56.6926915932079,6")
fk5;-circle(327.91014322175,-56.6933649937942,6")
fk5;-circle(327.925053778888,-56.6881908929324,6")
fk5;-circle(327.925817973408,-56.6917993447042,6")
fk5;-circle(327.919380764884,-56.6963160336012,6")
Region file: 1270788_754437114_241128d08h00m13s468711usUT_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(327.8846727639,-56.6653086737643,4")
image paragraph message for exposure 1 of trigger 1270788
------ Start for Possible Stand-alone Circular ----
In response to GRB241127 (Swift/BAT trigger 1270788) at 21:43:16 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 484 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 21:51:32.32 = 327.88467
DEC(J2000) = -56:39:55.1 = -56.66531
with a 90%-confidence error radius of about 0.61 arc sec. This position is 1.6
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.14 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.034.
------- notes for trigger 1270788 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 241128d08h00m15s202465usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1270788
-expid=754437114 -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/1270788/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 754437114.9117 or about 2024:332:21:51:49 UT
No information found about the number of stars in the star catalog for srclist
region.
Found 17 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 3 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.72 mag. Found 233 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 18% 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?
754437114 483 ? srclist data are not available.
754437114 483 WHITE 327.88467 -56.66531 17.14/20.7 1.6 image Yes
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -56.66531
GRB_ERROR: 0.61
GRB_RA: 327.88467
IMAGE_START_TIME: 21:51:49
MAGNITUDE: 17.14
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT