TDRSS lightcurve for Trigger=1330958

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 06 Jul 25 15:49:24 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1330958,   Seg_Num: 0
GRB_RA:          284.007d {+18h 56m 02s} (J2000),
                 284.247d {+18h 56m 59s} (current),
                 283.538d {+18h 54m 09s} (1950)
GRB_DEC:         +32.287d {+32d 17' 13"} (J2000),
                 +32.322d {+32d 19' 18"} (current),
                 +32.221d {+32d 13' 15"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       14208 [cnts]    Image_Peak=275 [image_cnts]
TRIGGER_DUR:     8.192 [sec] 
TRIGGER_INDEX:   490     E_range: 50-350 keV
BKG_INTEN:       97208 [cnts]
BKG_TIME:        56820.08 SOD {15:47:00.08} UT
BKG_DUR:         64 [sec]
GRB_DATE:        20862 TJD;   187 DOY;   25/07/06
GRB_TIME:        56910.96 SOD {15:48:30.96} UT
GRB_PHI:         138.72 [deg]
GRB_THETA:        39.25 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     11.48 [sigma]
IMAGE_SIGNIF:    8.16 [sigma]
MERIT_PARAMS:     +1  +0  +0  +3  +3  -2  +0  +0 +57  +0 
SUN_POSTN:       106.10d {+07h 04m 23s}  +22.61d {+22d 36' 38"}
SUN_DIST:        125.04 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:      233.41d {+15h 33m 38s}  -23.91d {-23d 54' 42"}
MOON_DIST:        74.27 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:       62.68, 13.21 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      290.75, 54.72 [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 = 182.38,19.96 [deg].

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 06 Jul 25 16:05:50 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1330958,   Seg_Num: 0
GRB_RA:          284.007d {+18h 56m 02s} (J2000),
                 284.247d {+18h 56m 59s} (current),
                 283.538d {+18h 54m 09s} (1950)
GRB_DEC:         +32.287d {+32d 17' 13"} (J2000),
                 +32.322d {+32d 19' 18"} (current),
                 +32.221d {+32d 13' 15"} (1950)
GRB_DATE:        20862 TJD;   187 DOY;   25/07/06
GRB_TIME:        56910.96 SOD {15:48:30.96} UT
TRIGGER_INDEX:   490
GRB_PHI:         138.72 [deg]
GRB_THETA:        39.25 [deg]
DELTA_TIME:      32.00 [sec]
TRIGGER_DUR:     8.192 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     11.48 [sigma]
IMAGE_SIGNIF:    8.16 [sigma]
LC_URL:          sw01330958000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 15:48:30 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 250706 ***A*** (trigger=1330958).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 284.007, +32.287 which is 
   RA(J2000) = 18h 56m 02s
   Dec(J2000) = +32d 17' 13"
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 ~1078 counts/sec (15-350 keV), at ~7 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: 22.784 s +/- 1.05552 s
  Estimated T50 duration: 11.648 s +/- 0.809543 s
  Estimated Peak Interval: MET   773509748.22399998 +/- 0.500000 s
  Estimated background rate 1:     3820.313 near MET 773509734.912000 s
  Estimated background rate 2:     4035.889 near MET 773509881.920000 s
  Estimated total duration: 84.096 s (for data selection)
       (from MET 773509746.624000 to MET 773509830.720000)
  Estimated total fluence: 5957.521649 count
  Created GTI with 4 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 284.007 32.287 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 284.007 32.287
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 7 6 16 310.528585  67.194096
 Obj: 2025 7 6 16 165.257845  -17.035547
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2025 7 6 16 267.440454  42.745850
 Obj: 2025 7 6 16 138.360130  -10.071548
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2025 7 6 16 265.881636  37.803602
 Obj: 2025 7 6 16 134.800308  -5.394352
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2025 7 6 16 246.356092  1.218728
 Obj: 2025 7 6 16 119.516136  14.745639
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2025 7 6 16 282.898867  -64.227403
 Obj: 2025 7 6 16 153.847337  20.615577
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2025 7 6 16 191.704044  -32.103583
 Obj: 2025 7 6 16 82.327946  79.275776
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2025 7 6 16 89.906762  53.233047
 Obj: 2025 7 6 16 216.446011  -16.958102
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2025 7 6 16 194.464857  35.628288
 Obj: 2025 7 6 16 104.894268  -80.543721
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1330958/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 Jul  6 12:06:22 EDT 2025