batgrbproduct analysis for trigger=1059460

batgrbproduct Analysis for Trigger=1059460

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Fri Jul  9 03:24:43 EDT 2021
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/prebascript/trigger1059460/GCN5_download_cron
======================================================================

  Trigger: 01059460      Segment: 000

  BAT Trigger Time: 647403964.416   [s; MET]
      Trigger Stop: 647403965.44   [s; MET]
               UTC: 2021-07-08T02:25:37.084880    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 173.699151561178   Dec: -49.1867314058096  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.82
     Image Trigger?:     NO
     Rate S/N Ratio:     8.42614977317636  [ if not an image trigger ]
     Image S/N Ratio:    6.82

  Flight Position:   [ source = BAT ]
    RA: 173.699151561178   Dec: -49.1867314058096  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 173.759469538435   Dec: -49.1639329017795  [deg; J2000]  
        { 11h 35m 02.3s , -49d 09' 50.2" }
         +/- 2.16323826155378 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.22202344693072 [arcmin] (formal 1-sigma fit error)
    SNR: 10.1017792017162
 
  Angular difference between Flight and Ground position is 2.732937 arcmin
 
  Partial Coding Fraction: 0.9453125    [ including projection effects ]

  Duration
     T90: 2.77199995517731 +/- 0.700048576666753
        Measured from: -0.48799991607666
                   to: 2.28400003910065     [s; relative to TRIGTIME]
     T50: 1.1399998664856 +/- 0.568014068147241
        Measured from: 0.340000152587891
                   to: 1.48000001907349     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.144000053405762     
                   to: 0.855999946594238     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.687999963760376     
                   to: 2.43999993801117     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.072710   0.113501   0.027692   0.011084
           0.012954   0.013373   0.010782   0.009309 [error]
 Peak      0.028907   0.057211   0.019788   0.006493
           0.007318   0.007719   0.006288   0.005332 [error]

     [ fluence units of on-axis counts / fully illuminated detector ] 

======================================================================
 
=== Fluence/Peak Flux Summary ===
 
              Model    Band1    Band2    Band3    Band4    Band5    Total      
                       15-25    25-50   50-100  100-350   15-150   15-350   keV
Fluence   Power-law 2.43e-08 3.20e-08 3.09e-08 5.31e-08 1.05e-07 1.40e-07   erg/cm2
              Error 5.10e-09 5.58e-09 9.10e-09 2.94e-08 2.19e-08 4.13e-08   erg/cm2
Peak flux Power-law 3.41e-01 2.79e-01 1.55e-01 1.26e-01 8.31e-01 9.01e-01   ph/cm2/s
              Error 9.22e-02 5.60e-02 4.69e-02 7.06e-02 1.67e-01 1.85e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.06e-08 4.74e-08 1.32e-08 1.27e-10 8.13e-08 8.13e-08   erg/cm2
              Error 6.11e-09 9.40e-09 1.19e-08 1.74e-09 1.71e-08 1.71e-08   erg/cm2
Peak flux Cutoff-PL 2.49e-01 4.07e-01 1.19e-01 2.57e-03 7.78e-01 7.78e-01   ph/cm2/s
              Error 1.13e-01 1.01e-01 9.66e-02 1.65e-02 1.67e-01 1.67e-01   ph/cm2/s
 
Fluence        Band 2.03e-08 4.66e-08 1.82e-08 6.95e-09 8.94e-08 9.26e-08   erg/cm2
              Error 5.65e-09 9.04e-09 1.20e-08 -------- -------- --------   erg/cm2
Peak flux      Band 2.31e-01 4.22e-01 1.22e-01 2.79e-02 7.91e-01 8.02e-01   ph/cm2/s
              Error 9.81e-02 -------- -------- -------- 1.63e-01 1.74e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.050    0.290    -      -           3.62e-03 8.04e-04   60.530 57
CPL  -2.890    3.758      34.1    5.0      5.22e+00 2.30e+03   47.610 56
 
The chi2 of BB fit is 48.01 which shows a significant improvement in the fit over a PL.
Check the BB fit.
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.852    0.328    -      -           5.91e-03 1.41e-03   81.520 57
CPL  -1.670    3.891      40.9    8.8      7.32e-01 9.07e+02   73.050 56
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^-{Ph_index} (minus sign is not included in the index)
Ph_90err   : 90% error of the photon index
Epeak      : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm       : normalization at 50 keV in PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedom
 
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
 
T90 in the 50-300 keV band: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    3.128   -0.688    2.440
T90     2.772   -0.488    2.284
T50     1.140    0.340    1.480
Peak    1.000   -0.144    0.856

Image

Pre-slew 15-350 keV image (Event data; bkg subtracted)

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  173.7595 -49.1639 0.0190   13.0  129.2       0.2395    10.1  TRIG_01059460       
------------------------------------------
 
Foreground time interval of the image:
 -0.688   2.440 (delta_t =   3.128 [sec])
Background time interval of the image:
-239.416  -0.688 (delta_t = 238.728 [sec])

Lightcurves

Notes:

1 s binning

From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval

64 ms binning

Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec

16 ms binning

From T100_start-5 s to T100_start+5 s

8 ms binning

From T100_start-3 s to T100_start+3 s

2 ms binning

From T100_start-1 s to T100_start+1 s

SN=5 or 10 sec. binning (whichever binning is satisfied first)

SN=5 or 10 sec. binning (T < 200 sec)

Spectra

Notes:

Time averaged spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   -0.688 sec. to    2.440 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.05050     ( -0.276832   0.302275 )
Norm@50keV  : 3.61872E-03    ( -0.000810853   0.000798119 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   60.53     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.50e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 3.128 sec: 0.555787 ( -0.0936886  0.0937224 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04688e-07 ( -2.14093e-08  2.23028e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.688 sec. to    2.440 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.89047     ( -5.2512   2.2646 )
Epeak [keV] : 34.0978      ( -4.31742 5.62991 )
Norm@50keV  : 5.21838    ( -4.92549   4585.07 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.61     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.80e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 3.128 sec: 0.524113 ( -0.091252  0.091754 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.13145e-08 ( -1.57911e-08  1.8392e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.688 sec. to    2.440 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.21293   ( -3.79159   -3.41656 )
beta        : -3.71844    ( 9.98412   19.9562 )
Epeak [keV] : 32.3203      ( -2.27129 5.00161 )
Norm@50keV   : 46.4500    ( -46.4135   24.9393 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 3.128 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.94323e-08 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 8.92416  (-1.19501  1.40195)
R^2/D10^2   : 0.449088  (-0.197225   0.334728)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   48.01     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.96e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.169e-08   6.032e-09
25- 50  4.548e-08   1.090e-08
50-150  1.691e-08   7.185e-09
15-150  8.407e-08   2.063e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 51.2799       (-16.7478      31.9019)
Norm        : 3.21454       (-0.745681     0.993615)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   55.06     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.48e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.473e-08   5.435e-09
25- 50  3.583e-08   8.555e-09
50-150  3.562e-08   1.750e-08
15-150  9.617e-08   2.554e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.02612        (-27.1123      -27.1123)
R1^2/D10^2  : 0.425844        (-0.000509326      0.775417)
kT2 [keV]   : 0.461307        (-8.71642      1.57946)
R2^2/D10^2  : 2.18660E+11    (-2.38032e+11   5.30785e+18)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.73     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.46e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.182e-08   1.075e-08
25- 50  4.502e-08   2.711e-08
50-150  2.088e-08   1.826e-08
15-150  8.772e-08   4.870e-08

Peak spectrum fit

Power-law model
Time interval is from   -0.144 sec. to    0.856 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.85177     ( -0.314098   0.341983 )
Norm@50keV  : 5.90529E-03    ( -0.00142683   0.00139307 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   81.52     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.82e-02 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.830650 ( -0.166737  0.166738 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.42892e-08 ( -1.279e-08  1.32727e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.144 sec. to    0.856 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.66995     ( -5.49528   2.28642 )
Epeak [keV] : 40.8678      ( -6.52527 10.9993 )
Norm@50keV  : 0.731929    ( -0.838102   1812.37 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   73.05     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.26e-02 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.777689 ( -0.166518  0.167744 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.34077e-08 ( -1.03215e-08  1.35972e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.144 sec. to    0.856 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.74842   ( -4.94684   -4.74842 )
beta        : -3.33365    ( 3.33365   0.965613 )
Epeak [keV] : 35.9997      ( -4.72009 5.29739 )
Norm@50keV   : 75.6828    ( -14.2302   264.336 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 0.791394 ( 6.20861  -0.158681 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.74079e-08 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 10.5004  (-1.67021  2.0529)
R^2/D10^2   : 0.369089  (-0.183962   0.336595)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   73.13     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.37e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.412e-09   2.917e-09
25- 50  2.237e-08   7.010e-09
50-150  1.343e-08   6.266e-09
15-150  4.421e-08   1.411e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 75.2398       (-31.1      81.5782)
Norm        : 4.10790       (-1.12665     1.31364)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   78.29     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.22e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.061e-08   3.110e-09
25- 50  1.721e-08   5.414e-09
50-150  2.328e-08   1.689e-08
15-150  5.110e-08   2.050e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 0.246884        (-0.777959      1.29372)
R1^2/D10^2  : 1.56659E+21        (-1.66797e+21      -1.66819e+21)
kT2 [keV]   : 10.8524        (-1.75183      2.19107)
R2^2/D10^2  : 0.318064    (-0.161923   0.298591)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   70.10     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.26e-02 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.142e-09   2.833e-09
25- 50  2.157e-08   7.658e-09
50-150  1.441e-08   7.094e-09
15-150  4.412e-08   1.500e-08
Plot creation:
Fri Jul  9 03:30:34 EDT 2021