batgrbproduct Analysis for Trigger=637899

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Tue Apr 14 08:12:38 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger637899/batgroup_hand_proc
======================================================================

  Trigger: 00637899      Segment: 000

  BAT Trigger Time: 450626112   [s; MET]
      Trigger Stop: 450626176   [s; MET]
               UTC: 2015-04-13T13:54:58.559120    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 190.38502276655   Dec: 71.8238536834753  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.29
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.29

  Flight Position:   [ source = BAT ]
    RA: 190.38502276655   Dec: 71.8238536834753  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 190.396136857211   Dec: 71.8394097100175  [deg; J2000]  
        { 12h 41m 35.1s , +71d 50' 21.9" }
         +/- 1.91494472399966 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.835237532341171 [arcmin] (formal 1-sigma fit error)
    SNR: 12.0236972884897
 
  Angular difference between Flight and Ground position is 0.956242 arcmin
 
  Partial Coding Fraction: 0.3554688    [ including projection effects ]

  Duration
     T90: 263.615999996662 +/- 36.7090501962671
        Measured from: -75.7519999742508
                   to: 187.864000022411     [s; relative to TRIGTIME]
     T50: 116.480000019073 +/- 16.0070484231669
        Measured from: -4.43999999761581
                   to: 112.040000021458     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 110.77999997139     
                   to: 111.77999997139     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -92.9840000271797     
                   to: 209.832000017166     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.070014   2.666313   1.880239   0.331043
           0.180083   0.177945   0.151610   0.127425 [error]
 Peak      0.038864   0.075968   0.060956   0.008451
           0.011225   0.011777   0.010115   0.008210 [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 7.47e-07 1.18e-06 1.41e-06 3.27e-06 4.28e-06 6.60e-06   erg/cm2
              Error 9.33e-08 9.09e-08 1.53e-07 7.47e-07 3.60e-07 8.76e-07   erg/cm2
Peak flux Power-law 5.91e-01 5.52e-01 3.58e-01 3.58e-01 1.65e+00 1.86e+00   ph/cm2/s
              Error 1.60e-01 9.97e-02 8.00e-02 1.54e-01 2.92e-01 3.26e-01   ph/cm2/s
 
Fluence   Cutoff-PL 7.22e-07 1.21e-06 1.43e-06 2.34e-06 4.22e-06 5.69e-06   erg/cm2
              Error 1.09e-07 1.10e-07 1.61e-07 -------- 3.92e-07 1.50e-06   erg/cm2
Peak flux Cutoff-PL 3.99e-01 6.64e-01 4.06e-01 6.50e-02 1.53e+00 1.53e+00   ph/cm2/s
              Error 1.89e-01 1.33e-01 1.03e-01 9.71e-02 3.05e-01 3.15e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band -------- -------- -------- -------- -------- --------   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    1.746    0.138    -      -           1.53e-03 1.24e-04   60.950 57
CPL   1.529    0.542     106.0    0.0      1.98e-03 0.00e+00   60.420 56
 
The chi2 of BB fit is Chi-Squared Chi-Squared 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    1.625    0.277    -      -           1.27e-02 2.32e-03   85.690 57
CPL  -0.616    1.900      56.6   16.7      1.78e-01 1.12e+00   78.730 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: 193.152000 sec.
T50 in the 50-300 keV band: 113.728000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  302.816  -92.984  209.832
T90   263.616  -75.752  187.864
T50   116.480   -4.440  112.040
Peak    1.000  110.780  111.780

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  190.3961    71.8394   0.0159    36.1292   144.5754         7.2222719     12.024 TRIG_00637899                 
 
Foreground time interval of the image:
-92.984 209.832 (delta_t = 302.816 [sec])
Background time interval of the image:
-239.000 -92.984 (delta_t = 146.016 [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  -92.984 sec. to  209.832 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.74613     ( -0.136358   0.139085 )
Norm@50keV  : 1.53236E-03    ( -0.000124322   0.000123155 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.95 using 59 PHA bins.
# Reduced chi-squared =          1.069 for     57 degrees of freedom 
# Null hypothesis probability =   3.358721e-01
 
Photon flux (15-150 keV)    in 302.8 sec: 0.206906 ( -0.0161141  0.0161458 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.28244e-06 ( -3.58394e-07  3.6091e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -92.984 sec. to  209.832 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.52893     ( -0.558526   0.526045 )
Epeak [keV] : 105.971      (   )
Norm@50keV  : 1.98293E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.42 using 59 PHA bins.
# Reduced chi-squared =          1.079 for     56 degrees of freedom 
# Null hypothesis probability =   3.191953e-01
 
Photon flux (15-150 keV)    in 302.8 sec: 0.204631 ( -0.016936  0.016931 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.21573e-06 ( -3.93216e-07  3.90733e-07 ) ergs/cm2
 
Band function
Time interval is from  -92.984 sec. to  209.832 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.52935   ( 1.4889   0.364706 )
beta        : -10.00000    ( 10   20 )
Epeak [keV] : 106.049      ( -43.2386 -106.049 )
Norm@50keV   : 1.98164E-03    ( -0.00014876   0.00179681 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.42 using 59 PHA bins.
# Reduced chi-squared =          1.099 for     55 degrees of freedom 
# Null hypothesis probability =   2.863829e-01
 
Photon flux (15-150 keV)    in 302.8 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 13.4270  (-1.27874  1.41164)
R^2/D10^2   : 3.24877E-02  (-0.00999313   0.0144434)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         107.23 using 59 PHA bins.
# Reduced chi-squared =         1.8812 for     57 degrees of freedom 
# Null hypothesis probability =   6.448954e-05
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.758e-07   5.148e-08
25- 50  1.339e-06   1.376e-07
50-150  1.555e-06   2.488e-07
15-150  3.270e-06   3.031e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 127.987       (-35.6542      55.2756)
Norm        : 0.858385       (-0.0807684     0.102679)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.08 using 59 PHA bins.
# Reduced chi-squared =          1.072 for     57 degrees of freedom 
# Null hypothesis probability =   3.314618e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.750e-07   7.116e-08
25- 50  1.221e-06   1.317e-07
50-150  2.247e-06   7.988e-07
15-150  4.143e-06   9.730e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.51101        (-1.20859      1.45719)
R1^2/D10^2  : 0.566798        (-0.330889      1.01476)
kT2 [keV]   : 21.2213        (-3.47667      5.45934)
R2^2/D10^2  : 4.94420E-03    (-0.00287476   0.00500182)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.10 using 59 PHA bins.
# Reduced chi-squared =          1.093 for     55 degrees of freedom 
# Null hypothesis probability =   2.963955e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.334e-07   2.924e-07
25- 50  1.156e-06   3.399e-07
50-150  2.236e-06   6.884e-07
15-150  4.125e-06   1.085e-06

Peak spectrum fit

Power-law model
Time interval is from  110.780 sec. to  111.780 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.62522     ( -0.272465   0.28113 )
Norm@50keV  : 1.27255E-02    ( -0.00232722   0.00230446 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          85.69 using 59 PHA bins.
# Reduced chi-squared =          1.503 for     57 degrees of freedom 
# Null hypothesis probability =   8.299414e-03
 
Photon flux (15-150 keV)    in 1 sec: 1.64832 ( -0.291665  0.292325 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.18667e-07 ( -2.26794e-08  2.30316e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  110.780 sec. to  111.780 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.615625     ( -2.25872   1.5421 )
Epeak [keV] : 56.5715      ( -9.84474 23.5541 )
Norm@50keV  : 0.177763    ( -0.177765   2.05851 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          78.73 using 59 PHA bins.
# Reduced chi-squared =          1.406 for     56 degrees of freedom 
# Null hypothesis probability =   2.427939e-02
 
Photon flux (15-150 keV)    in 1 sec: 1.52611 ( -0.30481  0.30538 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.05721e-07 ( -2.17911e-08  2.3684e-08 ) ergs/cm2
 
Band function
Time interval is from  110.780 sec. to  111.780 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.586703   ( -1.24108   2.09491 )
beta        : -10.0000    ( 10   3.55271e-15 )
Epeak [keV] : 56.6823      ( -9.87026 23.5241 )
Norm@50keV   : 0.172006    ( -0.176506   2.06339 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          78.73 using 59 PHA bins.
# Reduced chi-squared =          1.432 for     55 degrees of freedom 
# Null hypothesis probability =   1.958685e-02
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 14.0034  (-2.09713  2.52523)
R^2/D10^2   : 0.254075  (-0.116869   0.204196)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          79.13 using 59 PHA bins.
# Reduced chi-squared =          1.388 for     57 degrees of freedom 
# Null hypothesis probability =   2.787019e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.052e-08   3.156e-09
25- 50  3.915e-08   9.350e-09
50-150  5.056e-08   1.745e-08
15-150  1.002e-07   2.549e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 144.006       (-66.5354      -141.902)
Norm        : 6.94979       (-1.30771     1.6982)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          83.14 using 59 PHA bins.
# Reduced chi-squared =          1.459 for     57 degrees of freedom 
# Null hypothesis probability =   1.351528e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.791e-08   1.004e-08
25- 50  3.300e-08   1.824e-08
50-150  6.402e-08   4.007e-08
15-150  1.149e-07   6.685e-08
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.22267        (-3.16125      -3.16125)
R1^2/D10^2  : 17.7672        (      )
kT2 [keV]   : 14.8711        (-2.5767      -14.8711)
R2^2/D10^2  : 0.195583    (-0.195554   0.20833)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          77.89 using 59 PHA bins.
#Fit statistic : Chi-Squared =          77.85 using 59 PHA bins.
# Reduced chi-squared =          1.416 for     55 degrees of freedom 
# Reduced chi-squared =          1.416 for     55 degrees of freedom 
# Null hypothesis probability =   2.281922e-02
# Null hypothesis probability =   2.297029e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.355e-08   5.851e-09
25- 50  3.644e-08   1.793e-08
50-150  5.380e-08   3.161e-08
15-150  1.038e-07   5.595e-08
Plot creation:
Tue Apr 14 08:20:04 EDT 2015