batgrbproduct analysis for trigger=827924

batgrbproduct Analysis for Trigger=827924

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Mon Apr 23 09:13:27 EDT 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger827924/GCN5_download_cron
======================================================================

  Trigger: 00827924      Segment: 000

  BAT Trigger Time: 546139848   [s; MET]
      Trigger Stop: 546140624   [s; MET]
               UTC: 2018-04-23T01:30:27.170940    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 275.075327495063   Dec: 7.1934875314008  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    26.43
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    26.43

  Flight Position:   [ source = BAT ]
    RA: 275.075327495063   Dec: 7.1934875314008  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 275.082455556266   Dec: 7.18574342065212  [deg; J2000]  
        { 18h 20m 19.8s , +07d 11' 08.7" }
         +/- 0.431813833999037 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.115193519368493 [arcmin] (formal 1-sigma fit error)
    SNR: 100.953947674593
 
  Angular difference between Flight and Ground position is 0.629241 arcmin
 
  Partial Coding Fraction: 0.9921875    [ including projection effects ]

  Duration
     T90: 784.787999868393 +/- 16.0551460061756
        Measured from: 34.1920000314713
                   to: 818.979999899864     [s; relative to TRIGTIME]
     T50: 382.263999938965 +/- 11.5632073162527
        Measured from: 315.116000056267
                   to: 697.379999995232     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 844.636000037193     
                   to: 845.636000037193     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -77.1599999666214     
                   to: 847.916000008583     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    39.513585  48.094591  25.941766   3.576723
           0.219719   0.215164   0.175869   0.135975 [error]
 Peak      0.061899   0.108906   0.052782   0.029551
           0.016439   0.017490   0.015072   0.010485 [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 1.51e-05 1.99e-05 1.92e-05 3.31e-05 6.51e-05 8.73e-05   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux Power-law 7.04e-01 5.89e-01 3.35e-01 2.83e-01 1.75e+00 1.91e+00   ph/cm2/s
              Error 2.10e-01 1.27e-01 9.45e-02 1.44e-01 3.80e-01 4.10e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.23e-05 2.02e-05 2.04e-05 1.78e-05 6.22e-05 7.08e-05   erg/cm2
              Error 5.62e-07 3.55e-07 3.43e-07 1.61e-06 9.78e-07 1.96e-06   erg/cm2
Peak flux Cutoff-PL 5.78e-01 7.30e-01 3.86e-01 7.20e-02 1.75e+00 1.77e+00   ph/cm2/s
              Error 2.39e-01 1.82e-01 1.31e-01 1.18e-01 3.80e-01 3.90e-01   ph/cm2/s
 
Fluence        Band 1.22e-05 2.01e-05 2.04e-05 1.96e-05 6.21e-05 7.25e-05   erg/cm2
              Error -------- 3.78e-07 -------- -------- -------- --------   erg/cm2
Peak flux      Band 5.78e-01 7.30e-01 3.86e-01 -------- 1.75e+00 1.77e+00   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.048    0.000    -      -           7.60e-03 0.00e+00  141.110 57
CPL   1.365    0.114      53.6    2.4      1.50e-02 1.66e-03   24.030 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.814    0.314    -      -           1.27e-02 2.94e-03   51.200 57
CPL   0.156    1.775      52.2   26.3      1.01e-01 7.99e-01   47.080 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  925.076  -77.160  847.916
T90   784.788   34.192  818.980
T50   382.264  315.116  697.380
Peak    1.000  844.636  845.636

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  275.0825  +7.1857 0.0019   16.8  178.7     104.2591   101.0  TRIG_00827924       
------------------------------------------
 
Foreground time interval of the image:
-14.899 792.201 (delta_t = 807.100 [sec])
Background time interval of the image:

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  -77.160 sec. to  847.916 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.04773     (     )
Norm@50keV  : 7.60365E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         141.11 using 59 PHA bins.
# Reduced chi-squared =         2.4757 for     57 degrees of freedom 
# Null hypothesis probability =   4.387155e-09
 
Photon flux (15-150 keV)    in 925.1 sec: 1.16632 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.50638e-05 ( 0  0 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -77.160 sec. to  847.916 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.36483     ( -0.115696   0.113143 )
Epeak [keV] : 53.6299      ( -2.52071 2.3659 )
Norm@50keV  : 1.49848E-02    ( -0.00155371   0.00177111 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          24.03 using 59 PHA bins.
# Reduced chi-squared =         0.4291 for     56 degrees of freedom 
# Null hypothesis probability =   9.999430e-01
 
Photon flux (15-150 keV)    in 925.1 sec: 1.07218 ( -0.02518  0.02545 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.22231e-05 ( -9.77091e-07  9.79311e-07 ) ergs/cm2
 
Band function
Time interval is from  -77.160 sec. to  847.916 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.36094   ( -0.111   0.261687 )
beta        : -3.09535    ( 3.09965   0.707878 )
Epeak [keV] : 53.5701      ( -3.80018 2.30042 )
Norm@50keV   : 1.50507E-02    ( -0.00155646   0.00547759 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          24.02 using 59 PHA bins.
# Reduced chi-squared =         0.4367 for     55 degrees of freedom 
# Null hypothesis probability =   9.999122e-01
 
Photon flux (15-150 keV)    in 925.1 sec: 1.07175 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.21219e-05 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 15.0610  (  )
R^2/D10^2   : 0.100984  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =        1067.87 using 59 PHA bins.
# Reduced chi-squared =        18.7346 for     57 degrees of freedom 
# Null hypothesis probability =  2.423875e-186
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.434e-06   1.267e-07
25- 50  1.768e-05   3.515e-07
50-150  2.735e-05   5.088e-07
15-150  4.946e-05   6.892e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 85.2543       (-3.13525      3.34306)
Norm        : 5.01113       (-0.127728     0.130813)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          24.13 using 59 PHA bins.
# Reduced chi-squared =         0.4234 for     57 degrees of freedom 
# Null hypothesis probability =   9.999608e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.207e-05   2.960e-07
25- 50  2.017e-05   3.562e-07
50-150  2.969e-05   5.088e-07
15-150  6.193e-05   8.603e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.49902        (-0.380944      0.392331)
R1^2/D10^2  : 0.991255        (-0.16772      0.21247)
kT2 [keV]   : 22.5904        (-0.943307      1.08076)
R2^2/D10^2  : 1.49831E-02    (-0.00283517   0.0031943)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.89 using 59 PHA bins.
# Reduced chi-squared =         0.7615 for     55 degrees of freedom 
# Null hypothesis probability =   9.034533e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.014e-05   5.366e-07
25- 50  2.074e-05   4.949e-07
50-150  2.940e-05   6.244e-07
15-150  6.028e-05   1.147e-06

Peak spectrum fit

Power-law model
Time interval is from  844.636 sec. to  845.636 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.81372     ( -0.302049   0.326314 )
Norm@50keV  : 1.26572E-02    ( -0.00296464   0.00290668 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.20 using 59 PHA bins.
# Reduced chi-squared =         0.8983 for     57 degrees of freedom 
# Null hypothesis probability =   6.912495e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.75344 ( -0.379415  0.379797 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.16482e-07 ( -2.7197e-08  2.74653e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  844.636 sec. to  845.636 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.155789     ( -2.13587   1.4135 )
Epeak [keV] : 52.2104      ( -13.2672 39.386 )
Norm@50keV  : 0.100543    ( -0.100544   1.4979 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.08 using 59 PHA bins.
# Reduced chi-squared =         0.8407 for     56 degrees of freedom 
# Null hypothesis probability =   7.962699e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.75379 ( -0.37858  0.38124 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.12892e-07 ( -2.81171e-08  2.8368e-08 ) ergs/cm2
 
Band function
Time interval is from  844.636 sec. to  845.636 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.170976   ( -1.34059   1.79274 )
beta        : -10.0000    ( 10   3.55271e-15 )
Epeak [keV] : 52.2887      ( -13.3565 38.9917 )
Norm@50keV   : 9.86436E-02    ( -0.0986456   1.50017 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.08 using 59 PHA bins.
# Reduced chi-squared =         0.8560 for     55 degrees of freedom 
# Null hypothesis probability =   7.674098e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.75395 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.13121e-07 ( -1.13114e-07  -2.79204e-08 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 12.2206  (-2.5642  3.13943)
R^2/D10^2   : 0.446923  (-0.257414   0.603794)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.08 using 59 PHA bins.
# Reduced chi-squared =         0.8611 for     57 degrees of freedom 
# Null hypothesis probability =   7.628500e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.414e-08   5.605e-09
25- 50  4.544e-08   1.705e-08
50-150  4.130e-08   1.823e-08
15-150  1.009e-07   3.486e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 94.1463       (-40.5915      -94.1269)
Norm        : 8.21083       (-2.09003     2.62602)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.75 using 59 PHA bins.
# Reduced chi-squared =         0.8553 for     57 degrees of freedom 
# Null hypothesis probability =   7.734449e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.145e-08   6.105e-09
25- 50  3.663e-08   1.161e-08
50-150  5.731e-08   3.906e-08
15-150  1.154e-07   4.583e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.02296        (-8.02084      -8.02084)
R1^2/D10^2  : 1.23590        (-1.23659      -1.23659)
kT2 [keV]   : 19.2350        (-19.2276      -19.2276)
R2^2/D10^2  : 4.85134E-02    (-0.0486134   0.607295)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.92 using 59 PHA bins.
# Reduced chi-squared =         0.8532 for     55 degrees of freedom 
# Null hypothesis probability =   7.723992e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.793e-08   1.114e-08
25- 50  4.240e-08   2.499e-08
50-150  5.316e-08   3.061e-08
15-150  1.135e-07   6.290e-08
Plot creation:
Mon Apr 23 09:18:24 EDT 2018