TDRSS lightcurve for Trigger=1280056

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 08 Jan 25 10:23:43 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1280056,   Seg_Num: 0
GRB_RA:          201.297d {+13h 25m 11s} (J2000),
                 201.594d {+13h 26m 22s} (current),
                 200.705d {+13h 22m 49s} (1950)
GRB_DEC:         +25.613d {+25d 36' 46"} (J2000),
                 +25.483d {+25d 28' 59"} (current),
                 +25.873d {+25d 52' 21"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       9913 [cnts]    Image_Peak=311 [image_cnts]
TRIGGER_DUR:     4.096 [sec] 
TRIGGER_INDEX:   298     E_range: 25-100 keV
BKG_INTEN:       83911 [cnts]
BKG_TIME:        37333.14 SOD {10:22:13.14} UT
BKG_DUR:         40 [sec]
GRB_DATE:        20683 TJD;     8 DOY;   25/01/08
GRB_TIME:        37386.19 SOD {10:23:06.19} UT
GRB_PHI:         -151.94 [deg]
GRB_THETA:        25.30 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     10.86 [sigma]
IMAGE_SIGNIF:    8.13 [sigma]
MERIT_PARAMS:     +1  +0  +0  +2  +2  -2  +0  +0 +14  +0 
SUN_POSTN:       289.92d {+19h 19m 40s}  -22.17d {-22d 10' 21"}
SUN_DIST:         97.93 [deg]   Sun_angle= 5.9 [hr] (West of Sun)
MOON_POSTN:       33.88d {+02h 15m 31s}  +16.86d {+16d 51' 41"}
MOON_DIST:       136.00 [deg]
MOON_ILLUM:      66 [%]
GAL_COORDS:       23.49, 82.29 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      188.70, 31.80 [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:        This trigger occurred at longitude,latitude = 237.34,0.25 [deg].

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 08 Jan 25 10:42:24 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1280056,   Seg_Num: 0
GRB_RA:          201.297d {+13h 25m 11s} (J2000),
                 201.594d {+13h 26m 22s} (current),
                 200.705d {+13h 22m 49s} (1950)
GRB_DEC:         +25.613d {+25d 36' 46"} (J2000),
                 +25.483d {+25d 28' 59"} (current),
                 +25.873d {+25d 52' 21"} (1950)
GRB_DATE:        20683 TJD;     8 DOY;   25/01/08
GRB_TIME:        37386.19 SOD {10:23:06.19} UT
TRIGGER_INDEX:   298
GRB_PHI:         -151.94 [deg]
GRB_THETA:        25.30 [deg]
DELTA_TIME:      -25.00 [sec]
TRIGGER_DUR:     4.096 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     10.86 [sigma]
IMAGE_SIGNIF:    8.13 [sigma]
LC_URL:          sw01280056000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 10:23:06 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 250108 ***A*** (trigger=1280056).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 201.297, +25.613 which is 
   RA(J2000) = 13h 25m 11s
   Dec(J2000) = +25d 36' 46"
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 ~1210 counts/sec (15-350 keV), at ~2 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: 57.408 s +/- 2.90513 s
  Estimated T50 duration: 22.912 s +/- 2.06394 s
  Estimated Peak Interval: MET   758024622.97600007 +/- 0.500000 s
  Estimated background rate 1:     3924.647 near MET 758024606.720000 s
  Estimated background rate 2:     3947.217 near MET 758024745.280000 s
  Estimated total duration: 67.2 s (for data selection)
       (from MET 758024616.640000 to MET 758024683.840000)
  Estimated total fluence: 11849.165316 count
  Created GTI with 5 entries
------------------------------------------

    Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)

    bat_grb_pos_cat.sh 201.297 25.613 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 201.297 25.613
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: 2025 1 8 10 276.710008  -28.248711
 Obj: 2025 1 8 10 301.606440  67.918808
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2025 1 8 10 263.077854  -55.938599
 Obj: 2025 1 8 10 262.847471  41.979738
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2025 1 8 10 255.710462  -60.592026
 Obj: 2025 1 8 10 261.562034  37.204156
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2025 1 8 10 70.469133  -82.480584
 Obj: 2025 1 8 10 242.969341  0.429303
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2025 1 8 10 56.822149  -9.337355
 Obj: 2025 1 8 10 278.369441  -67.162419
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2025 1 8 10 76.523148  -20.484104
 Obj: 2025 1 8 10 188.900156  -29.595540
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2025 1 8 10 310.980956  19.804286
 Obj: 2025 1 8 10 93.701117  55.930244
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2025 1 8 10 295.626121  0.452848
 Obj: 2025 1 8 10 195.912882  32.363506
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1280056/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:
Wed Jan  8 05:42:42 EST 2025