TDRSS lightcurve for Trigger=1071768

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 03 Sep 21 14:10:00 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1071768,   Seg_Num: 0
GRB_RA:          299.550d {+19h 58m 12s} (J2000),
                 299.755d {+19h 59m 01s} (current),
                 299.079d {+19h 56m 19s} (1950)
GRB_DEC:         +34.943d {+34d 56' 36"} (J2000),
                 +35.003d {+35d 00' 10"} (current),
                 +34.807d {+34d 48' 25"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=2451 [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:        19460 TJD;   246 DOY;   21/09/03
GRB_TIME:        50684.33 SOD {14:04:44.33} UT
GRB_PHI:          14.76 [deg]
GRB_THETA:        22.55 [deg]
SOLN_STATUS:     0x513
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    13.59 [sigma]
MERIT_PARAMS:     +1  +0  +0  +6  +1  +3  +0  +1 +51  +0 
SUN_POSTN:       162.74d {+10h 50m 59s}   +7.33d {+07d 19' 35"}
SUN_DIST:        121.41 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
MOON_POSTN:      122.01d {+08h 08m 02s}  +24.26d {+24d 15' 34"}
MOON_DIST:       120.70 [deg]
MOON_ILLUM:      13 [%]
GAL_COORDS:       71.10,  2.96 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      313.47, 54.01 [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 does not match any source in the on-board catalog.  
COMMENTS:        This matches a source in the ground catalog: Cyg X-1,   delta=0.261 [deg].  
COMMENTS:        This is not a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 41.27,19.89 [deg].

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 03 Sep 21 14:15:06 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     4587541,   Seg_Num: 0
GRB_RA:          299.550d {+19h 58m 12s} (J2000),
                 299.755d {+19h 59m 01s} (current),
                 299.079d {+19h 56m 19s} (1950)
GRB_DEC:         +34.943d {+34d 56' 36"} (J2000),
                 +35.003d {+35d 00' 10"} (current),
                 +34.807d {+34d 48' 25"} (1950)
GRB_DATE:        19460 TJD;   246 DOY;   21/09/03
GRB_TIME:        50684.33 SOD {14:04:44.33} UT
TRIGGER_INDEX:   20000
GRB_PHI:          14.76 [deg]
GRB_THETA:        22.55 [deg]
DELTA_TIME:      -27795.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x513
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    0.00 [sigma]
LC_URL:          sw01071768000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 14:04:44 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 210903 ***A*** (trigger=1071768).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 299.550, +34.943 which is 
   RA(J2000) = 19h 58m 12s
   Dec(J2000) = +34d 56' 36"
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 ~1203 counts/sec (15-350 keV), at ~3 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:     4990.625 near MET 652370704.000000 s
  Estimated background rate 2:     4990.625 near MET 652370704.000000 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 299.550 34.943 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 299.550 34.943
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: 2021 9 3 14 294.068486  37.129503
 Obj: 2021 9 3 14 176.420788  -15.927075
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 3 14 268.316448  11.278902
 Obj: 2021 9 3 14 148.485487  -14.301831
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 3 14 265.399247  6.332027
 Obj: 2021 9 3 14 144.555973  -10.129532
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 3 14 248.512104  -30.176280
 Obj: 2021 9 3 14 125.257633  5.581480
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 3 14 3.039104  -66.029552
 Obj: 2021 9 3 14 145.966729  12.931459
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 3 14 154.529239  -45.002381
 Obj: 2021 9 3 14 98.867407  69.373468
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 3 14 29.739325  65.840241
 Obj: 2021 9 3 14 222.515213  -7.971906
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2021 9 3 14 233.379351  35.330504
 Obj: 2021 9 3 14 196.562322  -85.123297
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1071768/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:
Fri Sep  3 10:17:28 EDT 2021