batgrbproduct analysis for trigger=294645

batgrbproduct Analysis for Trigger=294645

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): Tue Jun 23 00:22:25 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger294645
======================================================================

  Trigger: 00294645      Segment: 000

  BAT Trigger Time: 214389464   [s; MET]
      Trigger Stop: 214389840   [s; MET]
               UTC: 2007-10-18T08:37:41.700440    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 164.67599151863   Dec: 53.8304941752699  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    7.55
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.55

  Flight Position:   [ source = BAT ]
    RA: 164.67599151863   Dec: 53.8304941752699  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 164.676   Dec: 53.8305  [deg; J2000]
        { 10h 58m 42.2s , +53d 49' 49.8" }
        +/- 2.70010687777 [arcmin] (estimated 90% radius based on SNR)
    SNR: 7.36065886316
 
 
  Angular difference between Flight and Ground position is 0.000461 arcmin
 
  Partial Coding Fraction: 0.9765625    [ including projection effects ]

  Duration
     T90: 273.567999988794 +/- 40.0731999316647
        Measured from: 132.196000009775
                   to: 405.763999998569     [s; relative to TRIGTIME]
     T50: 153.916000008583 +/- 64.4150747940504
        Measured from: 200.40000000596
                   to: 354.316000014544     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 301.655999988317     
                   to: 302.655999988317     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 119.784000009298     
                   to: 415.956000000238     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.528745   0.605148   0.515492   0.121955
           0.077773   0.080861   0.071164   0.062127 [error]
 Peak      0.005222   0.014783   0.014648  -0.000973
           0.004534   0.004775   0.004211   0.003745 [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 1.50e-07 2.65e-07 3.59e-07 1.00e-06 1.04e-06 1.78e-06   erg/cm2
              Error 3.32e-08 3.62e-08 7.09e-08 4.23e-07 1.67e-07 4.82e-07   erg/cm2
Peak flux Power-law 7.43e-02 9.08e-02 8.05e-02 1.23e-01 2.88e-01 3.68e-01   ph/cm2/s
              Error 4.79e-02 3.80e-02 3.30e-02 1.06e-01 1.07e-01 1.43e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.51e-07 2.66e-07 3.56e-07 9.17e-07 1.04e-06 1.69e-06   erg/cm2
              Error 3.32e-08 3.65e-08 7.08e-08 6.34e-07 1.66e-07 5.97e-07   erg/cm2
Peak flux Cutoff-PL 2.92e-02 1.12e-01 9.46e-02 8.38e-03 2.44e-01 2.44e-01   ph/cm2/s
              Error 4.78e-02 5.75e-02 4.58e-02 5.59e-02 1.11e-01 1.18e-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    1.563    0.250    -      -           3.74e-04 5.43e-05   70.070 57
CPL   1.564    0.251    9999.3    0.0      3.75e-04 2.11e-04   70.080 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.173    0.605    -      -           2.47e-03 8.98e-04   54.610 57
CPL  -2.762    0.540      60.9  148.4      1.96e-01 2.83e+02   51.630 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  296.172  119.784  415.956
T90   273.568  132.196  405.764
T50   153.916  200.400  354.316
Peak    1.000  301.656  302.656

Click here for the BAT GCN circular template

Special notes of this burst

Image

Pre-slew 15.0-50.0 keV image (Event data)

#RAcent DECcent POSerr Theta  Phi  Peak_Cts  SNR Name
164.676 53.831 0.000 19.909 -178.501 1.059 7.361 TRIG_00294645
 
Image time interval: 0.000 to 376.000 [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 376.000000

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 376.000000

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 376.000000

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  119.784 sec. to  415.956 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.56343     ( -0.247072   0.252157 )
Norm@50keV  : 3.73886E-04    ( -5.48472e-05   5.37305e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.07 using 59 PHA bins.
# Reduced chi-squared =          1.229 for     57 degrees of freedom 
# Null hypothesis probability =   1.144676e-01
 
Photon flux (15-150 keV)    in 296.2 sec: 4.75178E-02 ( -0.00640806  0.00641392 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04061e-06 ( -1.65735e-07  1.68976e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  119.784 sec. to  415.956 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.56390     ( -0.250765   0.251191 )
Epeak [keV] : 9999.27      ( -9999.36 -9999.36 )
Norm@50keV  : 3.74599E-04    ( -5.51368e-05   0.000367062 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.08 using 59 PHA bins.
# Reduced chi-squared =          1.251 for     56 degrees of freedom 
# Null hypothesis probability =   9.769626e-02
 
Photon flux (15-150 keV)    in 296.2 sec: 4.75564E-02 ( -0.0064404  0.0063711 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04243e-06 ( -1.67628e-07  1.63393e-07 ) ergs/cm2

Band function

Time interval is from  119.784 sec. to  415.956 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.79818   ( -4.79818   -4.79818 )
beta        : -1.66727    ( -0.320233   0.286441 )
Epeak [keV] : 24.0065      ( -24.0065 5.46834 )
Norm@50keV   : 38.6367    ( -5.16   240631 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.47 using 59 PHA bins.
# Reduced chi-squared =          1.263 for     55 degrees of freedom 
# Null hypothesis probability =   9.061870e-02
 
Photon flux (15-150 keV)    in 296.2 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]    : 12.2737  (-2.5755  3.78566)
R^2/D10^2   : 1.02744E-02  (-0.0101589   0.013786)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          93.81 using 59 PHA bins.
# Reduced chi-squared =          1.646 for     57 degrees of freedom 
# Null hypothesis probability =   1.539906e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.712e-08   2.737e-08
25- 50  3.138e-07   6.907e-08
50-150  2.884e-07   8.883e-08
15-150  6.993e-07   1.493e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.053       (-66.3061      -199.163)
Norm        : 0.192402       (-0.0257351     0.0260401)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.25 using 59 PHA bins.
# Reduced chi-squared =          1.250 for     57 degrees of freedom 
# Null hypothesis probability =   9.699477e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.419e-07   7.956e-08
25- 50  2.730e-07   1.503e-07
50-150  5.984e-07   3.328e-07
15-150  1.013e-06   5.668e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.57727        (-1.56339      1.91457)
R1^2/D10^2  : 7.70795E-02        (-0.0464654      0.137142)
kT2 [keV]   : 35.6203        (-12.3963      47.1172)
R2^2/D10^2  : 2.33718E-04    (-0.000203102   0.000416831)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.99 using 59 PHA bins.
# Reduced chi-squared =          1.218 for     55 degrees of freedom 
# Null hypothesis probability =   1.288378e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.603e-07   8.367e-08
25- 50  2.600e-07   1.250e-07
50-150  6.877e-07   3.782e-07
15-150  1.108e-06   5.067e-07

Peak spectrum fit

Power-law model

Time interval is from  301.656 sec. to  302.656 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.17301     ( -0.625521   0.584956 )
Norm@50keV  : 2.46505E-03    ( -0.000898458   0.000898353 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.61 using 59 PHA bins.
# Reduced chi-squared =         0.9581 for     57 degrees of freedom 
# Null hypothesis probability =   5.651262e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.288330 ( -0.106775  0.107699 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.51931e-08 ( -9.845e-09  1.01957e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from  301.656 sec. to  302.656 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.76176     ( 2.81793   3.89846 )
Epeak [keV] : 60.8550      ( -14.7143 282.004 )
Norm@50keV  : 0.195737    ( -0.254281   566.443 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.63 using 59 PHA bins.
# Reduced chi-squared =         0.9220 for     56 degrees of freedom 
# Null hypothesis probability =   6.407148e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.243615 ( -0.105918  0.116021 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.93203e-08 ( -8.0225e-09  1.10221e-08 ) ergs/cm2

Band function

Time interval is from  301.656 sec. to  302.656 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.62579   ( -6.12149   -4.62579 )
beta        : -3.53056    ( 3.53056   3.37674 )
Epeak [keV] : 56.8787      ( -13.8748 23.4214 )
Norm@50keV   : 1.42778    ( -0.485917   142.802 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.63 using 59 PHA bins.
# Reduced chi-squared =         0.9387 for     55 degrees of freedom 
# Null hypothesis probability =   6.043113e-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]    : 16.5819  (-4.58424  7.71696)
R^2/D10^2   : 2.69195E-02  (-0.0269183   0.0542256)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.88 using 59 PHA bins.
# Reduced chi-squared =         0.9102 for     57 degrees of freedom 
# Null hypothesis probability =   6.669240e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.517e-09   9.550e-10
25- 50  6.580e-09   4.015e-09
50-150  1.281e-08   8.860e-09
15-150  2.091e-08   1.312e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-123.36      -199.363)
Norm        : 1.19620       (-0.442986     0.442997)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.26 using 59 PHA bins.
# Reduced chi-squared =         0.9694 for     57 degrees of freedom 
# Null hypothesis probability =   5.406889e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.979e-09   1.919e-09
25- 50  5.730e-09   3.629e-09
50-150  1.257e-08   7.940e-09
15-150  2.128e-08   1.349e-08

Double BB

------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 1.02004E-04        (5.60009e-06      -0.000102004)
R1^2/D10^2  : 8.44322E+05        (-844322      -844322)
kT2 [keV]   : 16.5819        (-4.58404      7.71717)
R2^2/D10^2  : 2.69194E-02    (-0.0269194   0.0542247)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.99 using 59 PHA bins.
#Fit statistic : Chi-Squared =          51.88 using 59 PHA bins.
# Reduced chi-squared =         0.9453 for     55 degrees of freedom 
# Reduced chi-squared =         0.9433 for     55 degrees of freedom 
# Null hypothesis probability =   5.903574e-01
# Null hypothesis probability =   5.944821e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.689e-09   1.105e-09
25- 50  6.896e-09   4.250e-09
50-150  1.139e-08   7.510e-09
15-150  1.997e-08   1.304e-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: 1.56343     ( -0.247072   0.252157 )
Norm@50keV  : 3.73886E-04    ( -5.48472e-05   5.37305e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.07 using 59 PHA bins.
# Reduced chi-squared =          1.229 for     57 degrees of freedom 
# Null hypothesis probability =   1.144676e-01
 
Photon flux (15-150 keV)    in 296.2 sec: 4.75178E-02 ( -0.00640806  0.00641392 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04061e-06 ( -1.65735e-07  1.68976e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.56390     ( -0.250765   0.251191 )
Epeak [keV] : 9999.27      ( -9999.36 -9999.36 )
Norm@50keV  : 3.74599E-04    ( -5.51368e-05   0.000367062 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.08 using 59 PHA bins.
# Reduced chi-squared =          1.251 for     56 degrees of freedom 
# Null hypothesis probability =   9.769626e-02
 
Photon flux (15-150 keV)    in 296.2 sec: 4.75564E-02 ( -0.0064404  0.0063711 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04243e-06 ( -1.67628e-07  1.63393e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.79818   ( -4.79818   -4.79818 )
beta        : -1.66727    ( -0.320233   0.286441 )
Epeak [keV] : 24.0065      ( -24.0065 5.46834 )
Norm@50keV   : 38.6367    ( -5.16   240631 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.47 using 59 PHA bins.
# Reduced chi-squared =          1.263 for     55 degrees of freedom 
# Null hypothesis probability =   9.061870e-02
 
Photon flux (15-150 keV)    in 296.2 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

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

S(25-50 keV)  = 2.65e-07
S(50-100 keV) = 3.59e-07

T90 vs. Hardness ratio plot

T90                                   = 273.567999988794 sec.
Hardness ratio (energy fluence ratio) = 1.35472

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.1445
Count Ratio (50-100 keV) / (15-25 keV) = 0.974935

Mask shadow pattern

IMX = -0.362055904287, IMY = 0.00947300589579

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 376.000000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 376.000000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 376.000000

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:
-12.099410 119.784000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
120.6147  33.8741    2.6  22.9   62.5   0.5512   4.5 ------	UNKNOWN                       
135.0746 -17.6975    2.2  56.5  -11.8   2.2229   5.2 ------	UNKNOWN                       
196.4520  40.7253    2.8  36.9 -137.9   0.6888   4.1 ------	UNKNOWN

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

Time interval of the image:
119.784000 415.956000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
115.9317  -8.0224    2.7  54.6   13.6   6.8518   4.3 ------	UNKNOWN                       
164.8090  53.8105    1.8  19.9 -178.3   1.6199   6.3 ------	UNKNOWN                       
189.8293  40.2014    2.5  32.0 -135.5   1.6003   4.6 ------	UNKNOWN                       
173.1599   0.3384    2.4  43.4  -64.6   4.8303   4.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
587.900600 963.032300
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3066  35.4265    7.2  25.2  163.2   0.1758   1.6    8.9	Her X-1                       
268.4244  -1.5687   14.0  59.2 -165.0   0.6225   0.9    7.7	SW J1753.5-0127               
239.5464  19.9853    2.5  25.1 -148.2   0.4740   4.6 ------	UNKNOWN                       
181.2819  19.5229    3.0  41.2  -37.0   0.6712   3.8 ------	UNKNOWN

Plot creation:
Thu Oct  8 20:34:37 EDT 2015