TDRSS lightcurve for Trigger=1436759
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sun 11 Jan 26 09:01:48 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1436759, Seg_Num: 0
GRB_RA: 338.484d {+22h 33m 56s} (J2000),
338.814d {+22h 35m 15s} (current),
337.852d {+22h 31m 24s} (1950)
GRB_DEC: +4.426d {+04d 25' 35"} (J2000),
+4.561d {+04d 33' 41"} (current),
+4.168d {+04d 10' 05"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 2574 [cnts] Image_Peak=120 [image_cnts]
TRIGGER_DUR: 1.024 [sec]
TRIGGER_INDEX: 139 E_range: 15-50 keV
BKG_INTEN: 18851 [cnts]
BKG_TIME: 32466.97 SOD {09:01:06.97} UT
BKG_DUR: 8 [sec]
GRB_DATE: 21051 TJD; 11 DOY; 26/01/11
GRB_TIME: 32483.23 SOD {09:01:23.23} UT
GRB_PHI: -168.17 [deg]
GRB_THETA: 31.57 [deg]
SOLN_STATUS: 0x83
RATE_SIGNIF: 31.01 [sigma]
IMAGE_SIGNIF: 6.68 [sigma]
MERIT_PARAMS: +1 +0 +0 +0 +1 -4 +0 +0 -62 +0
SUN_POSTN: 292.85d {+19h 31m 25s} -21.77d {-21d 46' 23"}
SUN_DIST: 52.12 [deg] Sun_angle= -3.1 [hr] (East of Sun)
MOON_POSTN: 205.57d {+13h 42m 17s} -14.73d {-14d 43' 49"}
MOON_DIST: 132.90 [deg]
MOON_ILLUM: 43 [%]
GAL_COORDS: 71.19,-44.20 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 341.81, 12.49 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS: SWIFT-BAT GRB Coordinates.
COMMENTS: This is a rate trigger.
COMMENTS: A point_source was found.
COMMENTS: This does not match any source in the on-board catalog.
COMMENTS: This does not match any source in the ground catalog.
COMMENTS: This is a GRB.
COMMENTS: Since the IMAGE_SIGNIF is less than 7 sigma, this is a questionable detection.
COMMENTS: This trigger occurred at longitude,latitude = 68.95,5.09 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Sun 11 Jan 26 09:18:25 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1436759, Seg_Num: 0
GRB_RA: 338.484d {+22h 33m 56s} (J2000),
338.814d {+22h 35m 15s} (current),
337.852d {+22h 31m 24s} (1950)
GRB_DEC: +4.426d {+04d 25' 35"} (J2000),
+4.561d {+04d 33' 41"} (current),
+4.168d {+04d 10' 05"} (1950)
GRB_DATE: 21051 TJD; 11 DOY; 26/01/11
GRB_TIME: 32483.23 SOD {09:01:23.23} UT
TRIGGER_INDEX: 139
GRB_PHI: -168.17 [deg]
GRB_THETA: 31.57 [deg]
DELTA_TIME: -24.00 [sec]
TRIGGER_DUR: 1.024 [sec]
SOLN_STATUS: 0x83
RATE_SIGNIF: 31.01 [sigma]
IMAGE_SIGNIF: 6.68 [sigma]
LC_URL: sw01436759000msb.lc
GCN template for BAT paragraph
Click here!
At 09:01:23 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 260111 ***A*** (trigger=1436759). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 338.484, +4.426 which is
RA(J2000) = 22h 33m 56s
Dec(J2000) = +04d 25' 35"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve showed a [**double-peaked**]
structure with a duration of about TTT sec. The peak count rate
was ~4296 counts/sec (15-350 keV), at ~0 sec after the trigger.
Test version of draft template
Initial TDRSS lightcurve and spacecraft attitude plot
TDRSS lightcurve from T0-30 to T0+50 (zoom in)
TDRSS light curve from T0-1 to T0+2 (More zoom in)
1.6s binned TDRSS light curve
Tilan's background subtracted TDRSS light curves
Extended TDRSS light curve and spacecraft attitude plot(s)
Extended TDRSS lc No.1
Extended TDRSS lc No.2
Extended TDRSS lc No.3
Extended TDRSS lc No.4
TDRSS extended lightcurve from T0-1 to T0+2
T50 and T90 calculation
******************************************
battblocks v1.18
------------------------------------------
Input Data: bat_raw_lc.fits
Output GTI: bb.gti
Events to Skip: 128 Changepoint log(prob) Prior: 6.000000
Internal Tick: 1.000000e-04 s
Lookback time: 0 s
Bkg. Subtract?: yes (for fluence/T50/T90 calculations)
------------------------------------------
Estimated T90 duration: 202.624 s +/- 21.9871 s
Estimated T50 duration: 202.624 s +/- 83.4558 s
Estimated Peak Interval: MET 789814920.76799989 +/- 0.500000 s
Estimated background rate 1: 5951.875 near MET 789814897.600000 s
Estimated background rate 2: 5544.434 near MET 789815103.872000 s
Estimated total duration: 202.624 s (for data selection)
(from MET 789814899.200000 to MET 789815101.824000)
Estimated total fluence: -84424.688789 count
Created GTI with 116 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 338.484 4.426 0.083
No match
Search for this GRB position to the source locations in BAT transient monitor (search radius within 12 arcmin)
python compare_catalog.py 338.484 4.426
No match
Link to SIMBAD
Click here for the SIMBAD search!
Frank's UVOT result
Click here!
Frank's UVOT Blinking images
Click here!
Elevation angle of GRB/Sun at the ground telescope locations
GSFC, Greenbelt, Maryland
TimeUT Azimuth Elevation
Sun: 2026 1 11 9 266.908758 -39.874404
Obj: 2026 1 11 9 193.865955 -45.548745
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2026 1 11 9 248.117342 -68.348695
Obj: 2026 1 11 9 143.022199 -47.020618
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2026 1 11 9 234.083456 -71.975912
Obj: 2026 1 11 9 137.030221 -42.503517
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2026 1 11 9 80.758210 -68.506295
Obj: 2026 1 11 9 101.940144 -18.141642
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2026 1 11 9 65.524548 1.863477
Obj: 2026 1 11 9 113.630901 26.033420
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2026 1 11 9 69.163624 -8.237331
Obj: 2026 1 11 9 59.355006 43.117392
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2026 1 11 9 301.223950 9.230426
Obj: 2026 1 11 9 255.284124 -16.250258
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2026 1 11 9 303.661592 -11.245396
Obj: 2026 1 11 9 327.226391 -60.340551
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1436759/tdrss_ql/
bat_raw_lc.fits : TDRSS FITS light curve from GCN
gcn_position.txt : GCN BAT position notice
ratelc_tdrss.qdp : QDP file of the TDRSS light curve
tdrss_lc.gif : GIF TDRSS light curve
sc_att.qdp : QDP file of the spacecraft attitude
sc_att.gif : GIF spacecraft attitude
bb.gti : Bayesian block GTI file (battblocks)
dur.gti : Duration GTI file (battblocks)
battblocks.log : Output log of battblocks
Plot creation:
Sun Jan 11 04:19:03 EST 2026