TDRSS lightcurve for Trigger=1218904

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Mar 24 01:19:06 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1218904,   Seg_Num: 0
GRB_RA:          299.269d {+19h 57m 05s} (J2000),
                 299.495d {+19h 57m 59s} (current),
                 298.801d {+19h 55m 12s} (1950)
GRB_DEC:         +35.441d {+35d 26' 29"} (J2000),
                 +35.507d {+35d 30' 27"} (current),
                 +35.306d {+35d 18' 23"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=4058 [image_cnts]
TRIGGER_DUR:     64.000 [sec] 
TRIGGER_INDEX:   20000     E_range: 15-50 keV
BKG_INTEN:       0 [cnts]
BKG_TIME:        0.00 SOD {00:00:00.00} UT
BKG_DUR:         0 [sec]
GRB_DATE:        20375 TJD;    66 DOY;   24/03/06
GRB_TIME:        4614.96 SOD {01:16:54.96} UT
GRB_PHI:         -166.78 [deg]
GRB_THETA:         0.03 [deg]
SOLN_STATUS:     0x1000041D
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    16.88 [sigma]
MERIT_PARAMS:     +0  +0 +100  +6  +1  +5  +0  +1 -48  +0 
SUN_POSTN:       347.08d {+23h 08m 19s}   -5.54d {-05d 32' 06"}
SUN_DIST:         60.63 [deg]   Sun_angle= 3.2 [hr] (West of Sun)
MOON_POSTN:      288.26d {+19h 13m 04s}  -27.62d {-27d 37' 16"}
MOON_DIST:        64.01 [deg]
MOON_ILLUM:      25 [%]
GAL_COORDS:       71.40,  3.42 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      313.39, 54.56 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This Notice was delayed by more than 60 sec past the end of the trigger integration interval;  
COMMENTS:        probably due to it occurring during a Malindi downlink session.  
COMMENTS:        This is an image trigger.  (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)  
COMMENTS:        A point_source was found.  
COMMENTS:        This matches a source in the on-board catalog: Num=28903=(null) (probably an AT_Slot).  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is not a GRB.  
COMMENTS:        This is an interesting source.

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 06 Mar 24 01:24:05 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     12390650,   Seg_Num: 15
GRB_RA:          299.269d {+19h 57m 05s} (J2000),
                 299.495d {+19h 57m 59s} (current),
                 298.801d {+19h 55m 12s} (1950)
GRB_DEC:         +35.441d {+35d 26' 29"} (J2000),
                 +35.507d {+35d 30' 27"} (current),
                 +35.306d {+35d 18' 23"} (1950)
GRB_DATE:        20375 TJD;    66 DOY;   24/03/06
GRB_TIME:        4614.96 SOD {01:16:54.96} UT
TRIGGER_INDEX:   20000
GRB_PHI:         -166.78 [deg]
GRB_THETA:         0.03 [deg]
DELTA_TIME:      387.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x41D
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    0.00 [sigma]
LC_URL:          sw01218904000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 01:16:54 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 240306 ***A*** (trigger=1218904).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 299.269, +35.441 which is 
   RA(J2000) = 19h 57m 05s
   Dec(J2000) = +35d 26' 29"
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 ~1054 counts/sec (15-350 keV), at ~4 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

    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 background rate 1:     4325.375 near MET 731380640.000000 s
  Estimated background rate 2:     4325.375 near MET 731380640.000000 s
  Estimated total fluence: 0.000000 count
  Created GTI with 1 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 299.269 35.441 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 299.269 35.441
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: 2024 3 6 1 101.744114  -22.696178
 Obj: 2024 3 6 1 165.312879  -13.769548
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2024 3 6 1 80.430219  4.815327
 Obj: 2024 3 6 1 139.975942  -7.222011
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2024 3 6 1 76.881150  9.435202
 Obj: 2024 3 6 1 136.529826  -2.620150
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2024 3 6 1 58.301775  46.239062
 Obj: 2024 3 6 1 122.548529  16.207448
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2024 3 6 1 218.967756  58.543465
 Obj: 2024 3 6 1 156.012731  18.065276
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2024 3 6 1 312.562951  37.635906
 Obj: 2024 3 6 1 99.897796  80.328879
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2024 3 6 1 164.662247  -66.072607
 Obj: 2024 3 6 1 213.833381  -14.870575
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2024 3 6 1 68.329285  -22.984175
 Obj: 2024 3 6 1 120.847613  -78.910799
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1218904/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:
Tue Mar  5 20:24:23 EST 2024