TDRSS lightcurve for Trigger=1061511

Notes:

GCN BAT Position Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 25 Jul 21 03:48:02 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1061511,   Seg_Num: 0
GRB_RA:          215.363d {+14h 21m 27s} (J2000),
                 215.640d {+14h 22m 34s} (current),
                 214.719d {+14h 18m 53s} (1950)
GRB_DEC:          -1.177d {-01d 10' 36"} (J2000),
                  -1.275d {-01d 16' 28"} (current),
                  -0.949d {-00d 56' 55"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       11259 [cnts]    Image_Peak=343 [image_cnts]
TRIGGER_DUR:     5.504 [sec] 
TRIGGER_INDEX:   489     E_range: 50-350 keV
BKG_INTEN:       75412 [cnts]
BKG_TIME:        13556.57 SOD {03:45:56.57} UT
BKG_DUR:         48 [sec]
GRB_DATE:        19420 TJD;   206 DOY;   21/07/25
GRB_TIME:        13622.93 SOD {03:47:02.93} UT
GRB_PHI:         -75.93 [deg]
GRB_THETA:        13.03 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     23.79 [sigma]
IMAGE_SIGNIF:    8.32 [sigma]
MERIT_PARAMS:     +1  +0  +0  +2  +3  -1  +0  +0  +1  +0 
SUN_POSTN:       124.72d {+08h 18m 53s}  +19.61d {+19d 36' 40"}
SUN_DIST:         91.30 [deg]   Sun_angle= -6.1 [hr] (East of Sun)
MOON_POSTN:      320.25d {+21h 21m 00s}  -20.42d {-20d 25' 21"}
MOON_DIST:       103.21 [deg]
MOON_ILLUM:      99 [%]
GAL_COORDS:      343.98, 54.36 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      213.47, 12.20 [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 = 191.81,19.81 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(1.0<100sec) coincident with the FERMI_GBM event (trignum=648877628).

GCN BAT Lightcurve Notice

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 25 Jul 21 04:07:30 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1061511,   Seg_Num: 0
GRB_RA:          215.363d {+14h 21m 27s} (J2000),
                 215.640d {+14h 22m 34s} (current),
                 214.719d {+14h 18m 53s} (1950)
GRB_DEC:          -1.177d {-01d 10' 36"} (J2000),
                  -1.275d {-01d 16' 28"} (current),
                  -0.949d {-00d 56' 55"} (1950)
GRB_DATE:        19420 TJD;   206 DOY;   21/07/25
GRB_TIME:        13622.93 SOD {03:47:02.93} UT
TRIGGER_INDEX:   489
GRB_PHI:         -75.93 [deg]
GRB_THETA:        13.03 [deg]
DELTA_TIME:      -76.00 [sec]
TRIGGER_DUR:     5.504 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     23.79 [sigma]
IMAGE_SIGNIF:    8.32 [sigma]
LC_URL:          sw01061511000msb.lc

GCN template for BAT paragraph

  • Click here! 
    At 03:47:02 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 210725 ***A*** (trigger=1061511).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 215.363, -1.177 which is 
   RA(J2000) = 14h 21m 27s
   Dec(J2000) = -01d 10' 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 ~1851 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: 45.696 s +/- 4.096 s
  Estimated T50 duration: 32.768 s +/- 2.06394 s
  Estimated Peak Interval: MET   648877651.00799990 +/- 0.500000 s
  Estimated background rate 1:     3662.373 near MET 648877637.440000 s
  Estimated background rate 2:     3568.176 near MET 648877769.984000 s
  Estimated total duration: 55.168 s (for data selection)
       (from MET 648877649.280000 to MET 648877704.448000)
  Estimated total fluence: 12300.827131 count
  Created GTI with 7 entries
------------------------------------------

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

    bat_grb_pos_cat.sh 215.363 -1.177 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 215.363 -1.177
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 7 25 4 159.505884  -28.767011
 Obj: 2021 7 25 4 76.149918  14.488617
  • the object visibility at GSFC, Greenbelt, Maryland 
     
MMT Observatory, Mt. Hopkins, Arizona
      TimeUT       Azimuth     Elevation
 Sun: 2021 7 25 4 127.781041  -17.842090
 Obj: 2021 7 25 4 53.013562  42.499108
  • the object visibility at MMT, Mt. Hopkins, Arizona 
     
Hale Telescope, Palomar Mountain, California
      TimeUT       Azimuth     Elevation
 Sun: 2021 7 25 4 124.120896  -12.781217
 Obj: 2021 7 25 4 45.406690  45.235467
  • the object visibility at Hale Telescope, Palomar Mt., California 
     
Mauna Kea, Hawaii
      TimeUT       Azimuth     Elevation
 Sun: 2021 7 25 4 106.326522  13.330166
 Obj: 2021 7 25 4 337.457747  67.285502
  • the object visibility at Mauna Kea, Hawaii 
     
Siding Spring Obs., Australia
      TimeUT       Azimuth     Elevation
 Sun: 2021 7 25 4 149.458071  32.882066
 Obj: 2021 7 25 4 256.917365  22.696907
  • the object visibility at Siding Spring Obs., Australia 
     
Tokyo, Japan
      TimeUT       Azimuth     Elevation
 Sun: 2021 7 25 4 34.361072  72.605186
 Obj: 2021 7 25 4 276.402662  6.985739
  • the object visibility at Tokyo, Japan 
     
William Herschel Telescope, La Palma, Canary Islands, Spain
      TimeUT       Azimuth     Elevation
 Sun: 2021 7 25 4 223.331951  -28.152369
 Obj: 2021 7 25 4 110.073581  -34.305059
  • the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain 
     
Gemini South, Cerro Pachon, Chile
      TimeUT       Azimuth     Elevation
 Sun: 2021 7 25 4 50.928469  -74.022636
 Obj: 2021 7 25 4 96.072451  12.695165
  • the object visibility at Gemini South, Cerro Pachon, Chile 
     
 
 
The data/results are in /local/data/bat1/prebascript/trigger1061511/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 25 00:08:24 EDT 2021