batgrbproduct analysis for trigger=633237

batgrbproduct Analysis for Trigger=633237

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done using the HEASARC data.
3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Mon Apr  6 14:07:38 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger633237
======================================================================

  Trigger: 00633237      Segment: 000

  BAT Trigger Time: 446967769.92   [s; MET]
      Trigger Stop: 446967775.424   [s; MET]
               UTC: 2015-03-02T05:42:36.665740    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 175.508317651857   Dec: 36.8269551392691  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.58
     Image Trigger?:     NO
     Rate S/N Ratio:     12.0415945787923  [ if not an image trigger ]
     Image S/N Ratio:    6.58

  Flight Position:   [ source = BAT ]
    RA: 175.508317651857   Dec: 36.8269551392691  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 175.508   Dec: 36.827  [deg; J2000]
        { 11h 42m 01.9s , +36d 49' 37.2" }
        +/- 2.58719266663 [arcmin] (estimated 90% radius based on SNR)
    SNR: 7.82383728539
 
 
  Angular difference between Flight and Ground position is 0.015491 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 23.8720000386238 +/- 8.72960939878939
        Measured from: -0.312000036239624
                   to: 23.5600000023842     [s; relative to TRIGTIME]
     T50: 8.7039999961853 +/- 5.52637311306892
        Measured from: 3.20800000429153
                   to: 11.9120000004768     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.61199998855591     
                   to: 3.61199998855591     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.14399999380112     
                   to: 28.2319999933243     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.115092   0.206622   0.099345   0.063910
           0.027687   0.029138   0.025836   0.024024 [error]
 Peak      0.010252   0.022766   0.016347   0.004495
           0.005252   0.005462   0.004973   0.004427 [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 4.22e-08 6.93e-08 8.60e-08 2.12e-07 2.57e-07 4.09e-07   erg/cm2
              Error 1.12e-08 1.24e-08 2.44e-08 1.23e-07 5.73e-08 1.47e-07   erg/cm2
Peak flux Power-law 1.17e-01 1.30e-01 1.03e-01 1.35e-01 4.00e-01 4.85e-01   ph/cm2/s
              Error 5.91e-02 4.23e-02 3.86e-02 1.05e-01 1.22e-01 1.56e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.95e-08 7.60e-08 8.39e-08 6.13e-08 2.35e-07 2.61e-07   erg/cm2
              Error 1.27e-08 1.89e-08 3.13e-08 1.66e-07 6.97e-08 1.88e-07   erg/cm2
Peak flux Cutoff-PL 1.02e-01 1.39e-01 1.10e-01 6.31e-02 3.90e-01 4.14e-01   ph/cm2/s
              Error 6.77e-02 5.01e-02 4.52e-02 1.23e-01 1.24e-01 1.74e-01   ph/cm2/s
 
Fluence        Band 3.58e-08 8.19e-08 7.79e-08 1.17e-07 2.38e-07 3.18e-07   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band 1.03e-01 1.37e-01 1.10e-01 6.84e-02 3.92e-01 4.26e-01   ph/cm2/s
              Error -------- -------- 4.06e-02 -------- 1.23e-01 --------   ph/cm2/s

 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.687    0.326    -      -           9.45e-04 1.97e-04   60.890 57
CPL   0.931    1.889      60.3   -9.4      2.55e-03 3.96e-02   60.180 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.333    0.515    -      -           3.33e-03 1.03e-03   57.320 57
CPL   0.576    1.843      96.0    0.0      7.95e-03 5.99e-02   56.760 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   29.376   -1.144   28.232
T90    23.872   -0.312   23.560
T50     8.704    3.208   11.912
Peak    1.000    2.612    3.612

Click here for the BAT GCN circular template

Special notes of this burst

Image

Pre-slew 25.0-100.0 keV image (Event data)

#RAcent DECcent POSerr Theta  Phi  Peak_Cts  SNR Name
175.508 36.827 0.000 12.386 172.636 0.140 7.824 TRIG_00633237
 
Image time interval: 0.000 to 5.504 [sec]

Lightcurves

Notes:

1) The mask-weighted light curves are using the flight position.
2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
3) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
4) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
5) Time of each bin is in the middle of the bin.

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

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 5.504000

8 ms binning

From T100_start-3 s to T100_start+3 s

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 5.504000

2 ms binning

From T100_start-1 s to T100_start+1 s

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 5.504000

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

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

Quad-rate summed light curves (from T0-300s to T0+1000s)

Spectral Evolution

Spectra

Notes:

1) The fitting includes the systematic errors.
2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.

Time averaged spectrum fit using the average DRM

Power-law model

Time interval is from   -1.144 sec. to   28.232 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.68664     ( -0.316028   0.336293 )
Norm@50keV  : 9.44654E-04    ( -0.000200596   0.000194288 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.89 using 59 PHA bins.
# Reduced chi-squared =          1.068 for     57 degrees of freedom 
# Null hypothesis probability =   3.376636e-01
 
Photon flux (15-150 keV)    in 29.38 sec: 0.124881 ( -0.0224292  0.0224301 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.5725e-07 ( -5.62601e-08  5.84248e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -1.144 sec. to   28.232 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.930721     ( -2.49383   1.28438 )
Epeak [keV] : 60.2505      ( -41.4606 -60.3232 )
Norm@50keV  : 2.55030E-03    ( -0.00254073   0.0767138 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.18 using 59 PHA bins.
# Reduced chi-squared =          1.075 for     56 degrees of freedom 
# Null hypothesis probability =   3.270025e-01
 
Photon flux (15-150 keV)    in 29.38 sec: 0.121161 ( -0.0239227  0.023643 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.35381e-07 ( -6.72814e-08  7.20309e-08 ) ergs/cm2

Band function

Time interval is from   -1.144 sec. to   28.232 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.90475   ( -0.49215   -0.49215 )
beta        : -2.27227    ( 2.13988   0.643713 )
Epeak [keV] : 37.1027      ( -39.4103 70.9265 )
Norm@50keV   : 0.176190    ( -0.169789   8.57823 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.07 using 59 PHA bins.
# Reduced chi-squared =          1.074 for     55 degrees of freedom 
# Null hypothesis probability =   3.293485e-01
 
Photon flux (15-150 keV)    in 29.38 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.38475e-07 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 10.9865  (-1.96461  2.6033)
R^2/D10^2   : 4.28231E-02  (-0.0233041   0.0455146)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.97 using 59 PHA bins.
# Reduced chi-squared =          1.105 for     57 degrees of freedom 
# Null hypothesis probability =   2.734984e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.172e-08   1.132e-08
25- 50  8.956e-08   2.809e-08
50-150  6.101e-08   2.798e-08
15-150  1.823e-07   5.534e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 123.974       (-62.9275      -122.049)
Norm        : 0.528097       (-0.10666     0.153959)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.30 using 59 PHA bins.
# Reduced chi-squared =          1.058 for     57 degrees of freedom 
# Null hypothesis probability =   3.572323e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.036e-08   2.251e-08
25- 50  7.260e-08   4.081e-08
50-150  1.316e-07   8.673e-08
15-150  2.446e-07   1.495e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 1.15100        (-1.14084      1.85034)
R1^2/D10^2  : 1.14073E+04        (-13788.2      -13790.4)
kT2 [keV]   : 11.8889        (-2.29853      2.39516)
R2^2/D10^2  : 3.08273E-02    (-0.0183847   0.0202884)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.85 using 59 PHA bins.
# Reduced chi-squared =          1.070 for     55 degrees of freedom 
# Null hypothesis probability =   3.365360e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.310e-08   1.255e-08
25- 50  8.422e-08   3.138e-08
50-150  7.113e-08   3.538e-08
15-150  1.884e-07   6.945e-08

Peak spectrum fit

Power-law model

Time interval is from    2.612 sec. to    3.612 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.33317     ( -0.51285   0.518051 )
Norm@50keV  : 3.32997E-03    ( -0.00103035   0.00102041 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.32 using 59 PHA bins.
# Reduced chi-squared =          1.006 for     57 degrees of freedom 
# Null hypothesis probability =   4.633216e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.399799 ( -0.12161  0.121839 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.26491e-08 ( -1.10964e-08  1.14988e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    2.612 sec. to    3.612 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.576015     ( -2.47589   1.21039 )
Epeak [keV] : 95.9831      ( -95.9148 -95.9148 )
Norm@50keV  : 7.95084E-03    ( -0.00796223   0.111912 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.76 using 59 PHA bins.
# Reduced chi-squared =          1.013 for     56 degrees of freedom 
# Null hypothesis probability =   4.466715e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.389611 ( -0.123299  0.123859 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.10887e-08 ( -1.15167e-08  1.20557e-08 ) ergs/cm2

Band function

Time interval is from    2.612 sec. to    3.612 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.531614   ( -0.883017   2.6872 )
beta        : -10.0000    ( 10   1.42109e-14 )
Epeak [keV] : 92.5268      ( -45.085 -92.6434 )
Norm@50keV   : 8.43482E-03    ( -0.00841629   0.111507 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.76 using 59 PHA bins.
# Reduced chi-squared =          1.032 for     55 degrees of freedom 
# Null hypothesis probability =   4.093031e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.392410 ( 6.60759  -0.125314 ) 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]    : 17.3917  (-6.28064  9.13531)
R^2/D10^2   : 2.89310E-02  (-0.0288717   0.100505)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.74 using 59 PHA bins.
# Reduced chi-squared =          1.031 for     57 degrees of freedom 
# Null hypothesis probability =   4.115534e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.771e-09   1.142e-09
25- 50  7.977e-09   4.764e-09
50-150  1.735e-08   1.142e-08
15-150  2.709e-08   1.743e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.362       (-123.239      -199.363)
Norm        : 1.64504       (-0.497762     0.49841)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.48 using 59 PHA bins.
# Reduced chi-squared =          1.008 for     57 degrees of freedom 
# Null hypothesis probability =   4.572883e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.096e-09   2.626e-09
25- 50  7.880e-09   4.829e-09
50-150  1.728e-08   1.040e-08
15-150  2.926e-08   1.803e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.80029        (-6.51691      -6.74662)
R1^2/D10^2  : 0.390609        (-0.391836      -0.398168)
kT2 [keV]   : 25.6059        (-22.5508      -25.5549)
R2^2/D10^2  : 6.45661E-03    (-0.00649702   0.0196733)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.94 using 59 PHA bins.
# Reduced chi-squared =          1.017 for     55 degrees of freedom 
# Null hypothesis probability =   4.392497e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.539e-09   2.258e-09
25- 50  7.809e-09   4.064e-09
50-150  2.073e-08   1.365e-08
15-150  3.208e-08   1.653e-08

Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)

Power-law model

 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.68664     ( -0.316028   0.336293 )
Norm@50keV  : 9.44654E-04    ( -0.000200596   0.000194288 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.89 using 59 PHA bins.
# Reduced chi-squared =          1.068 for     57 degrees of freedom 
# Null hypothesis probability =   3.376636e-01
 
Photon flux (15-150 keV)    in 29.38 sec: 0.124881 ( -0.0224292  0.0224301 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.5725e-07 ( -5.62601e-08  5.84248e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.930721     ( -2.49383   1.28438 )
Epeak [keV] : 60.2505      ( -41.4606 -60.3232 )
Norm@50keV  : 2.55030E-03    ( -0.00254073   0.0767138 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.18 using 59 PHA bins.
# Reduced chi-squared =          1.075 for     56 degrees of freedom 
# Null hypothesis probability =   3.270025e-01
 
Photon flux (15-150 keV)    in 29.38 sec: 0.121161 ( -0.0239227  0.023643 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.35381e-07 ( -6.72814e-08  7.20309e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.90475   ( -0.49215   -0.49215 )
beta        : -2.27227    ( 2.13988   0.643713 )
Epeak [keV] : 37.1027      ( -39.4103 70.9265 )
Norm@50keV   : 0.176190    ( -0.169789   8.5769 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.07 using 59 PHA bins.
# Reduced chi-squared =          1.074 for     55 degrees of freedom 
# Null hypothesis probability =   3.293485e-01
 
Photon flux (15-150 keV)    in 29.38 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.38475e-07 ( 0  0 ) ergs/cm2

S(25-50 keV) vs. S(50-100 keV) plot

S(25-50 keV)  = 6.93e-08
S(50-100 keV) = 8.60e-08

T90 vs. Hardness ratio plot

T90                                   = 23.8720000386238 sec.
Hardness ratio (energy fluence ratio) = 1.24098

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.79528
Count Ratio (50-100 keV) / (15-25 keV) = 0.863179

Mask shadow pattern

IMX = -0.217792366346, IMY = -0.0281479751109

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 5.504000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 5.504000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 5.504000

Spacecraft aspect plot

Bright source in the pre-burst/pre-slew/post-slew images

Pre-burst image of 15-350 keV band

Time interval of the image:
-60.920000 -1.144000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']

Pre-slew background subtracted image of 15-350 keV band

Time interval of the image:
-1.144000 28.232000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
193.8202   4.7005    2.6  26.9   40.9   0.3615   4.5 ------	UNKNOWN                       
211.3629   6.5723    2.6  32.4    6.7   0.3693   4.5 ------	UNKNOWN                       
175.5154  36.8517    1.7  12.4  172.8   0.4590   6.9 ------	UNKNOWN                       
236.1919   9.3957    2.0  49.0  -22.2   0.8841   5.9 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
89.980660 112.780600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 97.2303  47.5546    2.2  56.5 -166.8   1.0096   5.2 ------	UNKNOWN                       
102.0197  64.1978    2.2  50.3 -147.3   0.7304   5.2 ------	UNKNOWN

Plot creation:
Tue Nov 24 12:35:28 EST 2015