batgrbproduct Analysis for Trigger=661775

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Oct 28 04:54:21 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger661775/GCN5_download_cron
======================================================================

  Trigger: 00661775      Segment: 000

  BAT Trigger Time: 467611119.488   [s; MET]
      Trigger Stop: 467611120   [s; MET]
               UTC: 2015-10-27T03:58:24.159080    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 272.491599210451   Dec: 61.3808915516615  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.26
     Image Trigger?:     NO
     Rate S/N Ratio:     29.1547594742265  [ if not an image trigger ]
     Image S/N Ratio:    9.26

  Flight Position:   [ source = BAT ]
    RA: 272.491599210451   Dec: 61.3808915516615  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 272.498176794594   Dec: 61.3610024881433  [deg; J2000]  
        { 18h 09m 59.6s , +61d 21' 39.6" }
         +/- 1.09139413663534 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.376726034959086 [arcmin] (formal 1-sigma fit error)
    SNR: 26.8447230721506
 
  Angular difference between Flight and Ground position is 1.208233 arcmin
 
  Partial Coding Fraction: 0.1894531    [ including projection effects ]

  Duration
     T90: 129.651999950409 +/- 5.47526252023579
        Measured from: 0.65200012922287
                   to: 130.304000079632     [s; relative to TRIGTIME]
     T50: 94.5759999752045 +/- 6.66225692853002
        Measured from: 19.0040001273155
                   to: 113.58000010252     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.203999996185303     
                   to: 1.2039999961853     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.739999949932098     
                   to: 167.776000022888     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     3.256558   4.347462   3.319655   0.987880
           0.100064   0.103666   0.090810   0.076611 [error]
 Peak      0.161779   0.262111   0.285139   0.118424
           0.017709   0.020566   0.020398   0.015647 [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 1.33e-06 2.14e-06 2.60e-06 6.20e-06 7.86e-06 1.23e-05   erg/cm2
              Error 7.63e-08 7.13e-08 9.33e-08 5.00e-07 2.31e-07 5.51e-07   erg/cm2
Peak flux Power-law 1.86e+00 2.19e+00 1.86e+00 2.67e+00 6.86e+00 8.58e+00   ph/cm2/s
              Error 2.94e-01 2.11e-01 1.58e-01 4.82e-01 5.71e-01 6.73e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.30e-06 2.16e-06 2.63e-06 5.43e-06 7.81e-06 1.15e-05   erg/cm2
              Error 9.83e-08 7.58e-08 1.07e-07 1.22e-06 2.48e-07 1.18e-06   erg/cm2
Peak flux Cutoff-PL 1.86e+00 2.19e+00 1.86e+00 2.65e+00 6.86e+00 8.56e+00   ph/cm2/s
              Error 3.33e-01 2.16e-01 1.81e-01 7.57e-01 5.77e-01 9.36e-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    1.720    0.054    -      -           5.04e-03 1.46e-04   42.060 57
CPL   1.615    0.179     203.5    0.0      5.63e-03 0.00e+00   41.360 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.239    0.135    -      -           5.81e-02 4.52e-03   49.520 57
CPL   1.234    0.329    9998.4    0.0      5.84e-02 2.19e-02   49.520 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: 120.960000 sec.
T50 in the 50-300 keV band: 105.792000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  168.516   -0.740  167.776
T90   129.652    0.652  130.304
T50    94.576   19.004  113.580
Peak    1.000    0.204    1.204

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  272.4982 +61.3610 0.0071   51.8    1.2       3.1237    26.8  TRIG_00661775       
------------------------------------------
 
Foreground time interval of the image:
 -0.740   8.213 (delta_t =   8.953 [sec])
Background time interval of the image:
-49.287 -12.168 (delta_t =  37.119 [sec])
-11.488  -0.740 (delta_t =  10.748 [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   -0.740 sec. to  167.776 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.72018     ( -0.0542032   0.0543958 )
Norm@50keV  : 5.04302E-03    ( -0.000146018   0.00014599 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.06 using 59 PHA bins.
# Reduced chi-squared =         0.7379 for     57 degrees of freedom 
# Null hypothesis probability =   9.306072e-01
 
Photon flux (15-150 keV)    in 168.5 sec: 0.674562 ( -0.022772  0.0228843 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.85586e-06 ( -2.31133e-07  2.31244e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.740 sec. to  167.776 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.61520     ( -0.220714   0.137253 )
Epeak [keV] : 203.543      (   )
Norm@50keV  : 5.63101E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.36 using 59 PHA bins.
# Reduced chi-squared =         0.7386 for     56 degrees of freedom 
# Null hypothesis probability =   9.281297e-01
 
Photon flux (15-150 keV)    in 168.5 sec: 0.668651 ( -0.025358  0.025451 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.81326e-06 ( -2.497e-07  2.45757e-07 ) ergs/cm2
 
Band function
Time interval is from   -0.740 sec. to  167.776 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.34963   ( 1.26783   1.26783 )
beta        : -1.77455    ( 1.77288   0.102218 )
Epeak [keV] : 72.4445      ( -67.7209 -67.7209 )
Norm@50keV   : 8.06082E-03    ( -0.00318058   51.1443 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.66 using 59 PHA bins.
# Reduced chi-squared =         0.7393 for     55 degrees of freedom 
# Null hypothesis probability =   9.254987e-01
 
Photon flux (15-150 keV)    in 168.5 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]    : 15.4032  (  )
R^2/D10^2   : 6.29792E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         340.58 using 59 PHA bins.
# Reduced chi-squared =         5.9750 for     57 degrees of freedom 
# Null hypothesis probability =   5.243012e-42
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.247e-07   3.092e-08
25- 50  2.136e-06   8.931e-08
50-150  3.488e-06   1.921e-07
15-150  6.148e-06   1.896e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 152.473       (-20.9775      21.7744)
Norm        : 2.70717       (-0.0999669     0.12292)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.40 using 59 PHA bins.
# Reduced chi-squared =         0.8316 for     57 degrees of freedom 
# Null hypothesis probability =   8.136391e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.170e-06   7.144e-08
25- 50  2.174e-06   1.188e-07
50-150  4.319e-06   9.621e-07
15-150  7.663e-06   1.088e-06
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.74820        (-0.743502      0.771347)
R1^2/D10^2  : 0.537715        (-0.149257      0.231152)
kT2 [keV]   : 28.8236        (-3.10426      4.18407)
R2^2/D10^2  : 4.91212E-03    (-0.00189974   0.00264082)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.83 using 59 PHA bins.
# Reduced chi-squared =         0.9606 for     55 degrees of freedom 
# Null hypothesis probability =   5.578274e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.070e-06   9.815e-08
25- 50  2.256e-06   1.415e-07
50-150  4.356e-06   3.977e-07
15-150  7.681e-06   5.240e-07

Peak spectrum fit

Power-law model
Time interval is from    0.204 sec. to    1.204 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.23871     ( -0.135397   0.133917 )
Norm@50keV  : 5.81291E-02    ( -0.00452906   0.00451752 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.52 using 59 PHA bins.
# Reduced chi-squared =         0.8688 for     57 degrees of freedom 
# Null hypothesis probability =   7.487890e-01
 
Photon flux (15-150 keV)    in 1 sec: 6.86270 ( -0.569458  0.571856 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.83499e-07 ( -4.74948e-08  4.75956e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.204 sec. to    1.204 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.23422     ( -0.522029   0.135235 )
Epeak [keV] : 9998.43      ( -9998.43 -9998.43 )
Norm@50keV  : 5.83994E-02    ( -0.0045011   0.0393857 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.52 using 59 PHA bins.
# Reduced chi-squared =         0.8843 for     56 degrees of freedom 
# Null hypothesis probability =   7.170625e-01
 
Photon flux (15-150 keV)    in 1 sec: 6.86017 ( -0.58339  0.57003 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.84811e-07 ( -4.9276e-08  4.6578e-08 ) ergs/cm2
 
Band function
Time interval is from    0.204 sec. to    1.204 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.82364   ( -4.82364   -4.82364 )
beta        : -1.26782    ( -0.145431   0.142927 )
Epeak [keV] : 24.3367      ( -24.3367 5.99684 )
Norm@50keV   : 4165.95    ( -321.271   1.69963e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.18 using 59 PHA bins.
# Reduced chi-squared =         0.8943 for     55 degrees of freedom 
# Null hypothesis probability =   6.953705e-01
 
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]    : 21.0242  (-2.13512  2.44466)
R^2/D10^2   : 0.265293  (-0.0810363   0.113847)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          92.66 using 59 PHA bins.
# Reduced chi-squared =          1.626 for     57 degrees of freedom 
# Null hypothesis probability =   1.976237e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.214e-08   3.600e-09
25- 50  1.139e-07   1.450e-08
50-150  3.753e-07   4.425e-08
15-150  5.113e-07   4.890e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-16.7879      -200)
Norm        : 29.0931       (-2.29149     2.29149)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.78 using 59 PHA bins.
# Reduced chi-squared =          1.189 for     57 degrees of freedom 
# Null hypothesis probability =   1.553677e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.247e-08   6.655e-09
25- 50  1.394e-07   1.855e-08
50-150  3.057e-07   9.950e-08
15-150  5.176e-07   9.825e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.40067        (-1.69296      2.08304)
R1^2/D10^2  : 5.23337        (-2.9426      8.14247)
kT2 [keV]   : 33.1403        (-6.11597      11.5098)
R2^2/D10^2  : 5.12530E-02    (-0.0309824   0.0504395)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.17 using 59 PHA bins.
# Reduced chi-squared =         0.8759 for     55 degrees of freedom 
# Null hypothesis probability =   7.309577e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.687e-08   2.081e-08
25- 50  1.270e-07   4.275e-08
50-150  4.078e-07   1.245e-07
15-150  5.917e-07   1.983e-07
Plot creation:
Wed Oct 28 05:02:46 EDT 2015