batgrbproduct analysis for trigger=622476

batgrbproduct Analysis for Trigger=622476

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 Jan 26 10:57:56 EST 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger622476
======================================================================

  Trigger: 00622476      Segment: 000

  BAT Trigger Time: 441241280   [s; MET]
      Trigger Stop: 441241360   [s; MET]
               UTC: 2014-12-25T23:01:07.034720    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 138.750633927598   Dec: 33.7947041860652  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.93
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.93

  Flight Position:   [ source = BAT ]
    RA: 138.750633927598   Dec: 33.7947041860652  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 138.751   Dec: 33.7947  [deg; J2000]
        { 09h 15m 00.2s , +33d 47' 40.9" }
        +/- 2.27447699607 [arcmin] (estimated 90% radius based on SNR)
    SNR: 9.40468846122
 
 
  Angular difference between Flight and Ground position is 0.018255 arcmin
 
  Partial Coding Fraction: 0.2617188    [ including projection effects ]

  Duration
     T90: 86.1479999423027 +/- 45.2225830681134
        Measured from: 6.66799998283386
                   to: 92.8159999251366     [s; relative to TRIGTIME]
     T50: 15.9599999189377 +/- 10.2614862607458
        Measured from: 12.3240000009537
                   to: 28.2839999198914     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 11.7519999742508     
                   to: 12.7519999742508     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 5.43199998140335     
                   to: 130.283999979496     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.669640   1.475394   1.158678   0.587153
           0.162771   0.168656   0.145375   0.123703 [error]
 Peak      0.023106   0.064214   0.077227   0.040101
           0.015611   0.016292   0.014907   0.012189 [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 2.90e-07 6.15e-07 1.02e-06 3.85e-06 2.81e-06 5.78e-06   erg/cm2
              Error 7.27e-08 9.22e-08 1.35e-07 1.17e-06 3.48e-07 1.23e-06   erg/cm2
Peak flux Power-law 2.61e-01 3.87e-01 4.29e-01 8.95e-01 1.35e+00 1.97e+00   ph/cm2/s
              Error 1.84e-01 1.68e-01 1.07e-01 5.11e-01 4.15e-01 5.09e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.92e-07 6.17e-07 1.02e-06 3.80e-06 2.81e-06 5.73e-06   erg/cm2
              Error 7.74e-08 9.37e-08 1.42e-07 1.43e-06 3.46e-07 1.74e-06   erg/cm2
Peak flux Cutoff-PL 2.72e-01 3.96e-01 4.29e-01 8.67e-01 1.36e+00 1.97e+00   ph/cm2/s
              Error 1.95e-01 1.60e-01 1.07e-01 5.80e-01 4.12e-01 6.14e-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    1.268    0.214    -      -           2.26e-03 2.75e-04   64.720 57
CPL   1.268    0.239    9999.4    0.0      2.27e-03 1.31e-03   64.730 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.853    0.530    -      -           1.17e-02 3.73e-03   50.990 57
CPL   0.857    0.535    9999.4    0.0      1.19e-02 1.42e-02   51.000 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: 25.216000 sec.
T50 in the 50-300 keV band: 12.736000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  124.852    5.432  130.284
T90    86.148    6.668   92.816
T50    15.960   12.324   28.284
Peak    1.000   11.752   12.752

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
138.751 33.795 0.000 47.667 177.605 2.144 9.405 TRIG_00622476
 
Image time interval: 0.000 to 80.000 [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

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)

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    5.432 sec. to  130.284 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.26787     ( -0.217572   0.209529 )
Norm@50keV  : 2.26080E-03    ( -0.000276093   0.000274706 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.72 using 59 PHA bins.
# Reduced chi-squared =          1.135 for     57 degrees of freedom 
# Null hypothesis probability =   2.253132e-01
 
Photon flux (15-150 keV)    in 124.9 sec: 0.268189 ( -0.0356307  0.0358766 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.81289e-06 ( -3.47289e-07  3.48176e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from    5.432 sec. to  130.284 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.26838     ( -0.270263   0.207453 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 2.26945E-03    ( -0.000273499   0.00235283 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.73 using 59 PHA bins.
# Reduced chi-squared =          1.156 for     56 degrees of freedom 
# Null hypothesis probability =   1.983687e-01
 
Photon flux (15-150 keV)    in 124.9 sec: 0.268921 ( -0.03644  0.03478 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.81166e-06 ( -3.45486e-07  3.47459e-07 ) ergs/cm2

Band function

Time interval is from    5.432 sec. to  130.284 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 2.80257   ( -3.75713   -3.75713 )
beta        : -1.36159    ( -0.306171   0.259119 )
Epeak [keV] : 32.8573      ( -30.1028 286.756 )
Norm@50keV   : 1.57207    ( -1.57081   40.9345 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.06 using 59 PHA bins.
# Reduced chi-squared =          1.165 for     55 degrees of freedom 
# Null hypothesis probability =   1.885142e-01
 
Photon flux (15-150 keV)    in 124.9 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]    : 18.6950  (-2.9877  3.94809)
R^2/D10^2   : 1.48895E-02  (-0.00715296   0.0124522)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          84.40 using 59 PHA bins.
# Reduced chi-squared =          1.481 for     57 degrees of freedom 
# Null hypothesis probability =   1.064901e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.285e-07   3.259e-08
25- 50  6.110e-07   1.253e-07
50-150  1.564e-06   3.274e-07
15-150  2.304e-06   3.853e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-37.229      -200)
Norm        : 1.15304       (-0.140262     0.140262)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.10 using 59 PHA bins.
# Reduced chi-squared =          1.247 for     57 degrees of freedom 
# Null hypothesis probability =   9.921434e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.588e-07   2.019e-07
25- 50  6.901e-07   3.791e-07
50-150  1.514e-06   8.381e-07
15-150  2.562e-06   1.436e-06

Double BB

------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 11.5157        (-2.51587      2.39713)
R1^2/D10^2  : 6.37400E-02        (-0.0351441      0.0892495)
kT2 [keV]   : 199.697        (-199.696      -199.697)
R2^2/D10^2  : 3.91528E-05    (-1.14597e-05   0.00105161)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.69 using 59 PHA bins.
#Fit statistic : Chi-Squared =          60.67 using 59 PHA bins.
# Reduced chi-squared =          1.104 for     55 degrees of freedom 
# Reduced chi-squared =          1.103 for     55 degrees of freedom 
# Null hypothesis probability =   2.782002e-01
# Null hypothesis probability =   2.790273e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.351e-07   1.046e-07
25- 50  7.146e-07   3.114e-07
50-150  1.854e-06   1.454e-06
15-150  2.804e-06   1.922e-06

Peak spectrum fit

Power-law model

Time interval is from   11.752 sec. to   12.752 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.852884     ( -0.578361   0.481055 )
Norm@50keV  : 1.17459E-02    ( -0.00392367   0.00354011 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.99 using 59 PHA bins.
# Reduced chi-squared =         0.8945 for     57 degrees of freedom 
# Null hypothesis probability =   6.989638e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.34824 ( -0.40891  0.421543 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.34304e-07 ( -3.35617e-08  3.35583e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   11.752 sec. to   12.752 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.857180     ( -0.595988   0.473764 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 1.18770E-02    ( -0.0039796   0.0244276 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.00 using 59 PHA bins.
# Reduced chi-squared =         0.9107 for     56 degrees of freedom 
# Null hypothesis probability =   6.642625e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.36250 ( -0.422879  0.40182 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.3435e-07 ( -3.3562e-08  3.352e-08 ) ergs/cm2

Band function

Time interval is from   11.752 sec. to   12.752 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.753361   ( 0.753356   0.753356 )
beta        : -0.852860    ( -0.480738   0.578391 )
Epeak [keV] : 19.4952      ( -19.4897 -19.4897 )
Norm@50keV   : 1.83246E-02    ( -0.00949823   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.99 using 59 PHA bins.
# Reduced chi-squared =         0.9270 for     55 degrees of freedom 
# Null hypothesis probability =   6.287426e-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]    : 33.4467  (-10.518  25.132)
R^2/D10^2   : 1.40039E-02  (-0.0140039   0.0303228)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.56 using 59 PHA bins.
# Reduced chi-squared =         0.9573 for     57 degrees of freedom 
# Null hypothesis probability =   5.669840e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.287e-09   1.447e-09
25- 50  1.471e-08   9.165e-09
50-150  1.105e-07   6.555e-08
15-150  1.275e-07   7.495e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-68.648      -200)
Norm        : 6.16302       (-1.6775     1.6775)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.88 using 59 PHA bins.
# Reduced chi-squared =          1.015 for     57 degrees of freedom 
# Null hypothesis probability =   4.426690e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.537e-08   9.305e-09
25- 50  2.956e-08   1.751e-08
50-150  6.483e-08   3.881e-08
15-150  1.098e-07   6.745e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.23315        (-3.81943      10.0311)
R1^2/D10^2  : 1.13898        (-1.1142      24.9756)
kT2 [keV]   : 48.7217        (-20.5169      -48.5387)
R2^2/D10^2  : 4.53458E-03    (-0.00435335   0.0178874)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.01 using 59 PHA bins.
# Reduced chi-squared =         0.9093 for     55 degrees of freedom 
# Null hypothesis probability =   6.652929e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.109e-08   7.410e-09
25- 50  2.304e-08   1.368e-08
50-150  1.053e-07   5.780e-08
15-150  1.394e-07   7.530e-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: 1.26787     ( -0.217572   0.209529 )
Norm@50keV  : 2.26080E-03    ( -0.000276093   0.000274706 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.72 using 59 PHA bins.
# Reduced chi-squared =          1.135 for     57 degrees of freedom 
# Null hypothesis probability =   2.253132e-01
 
Photon flux (15-150 keV)    in 124.9 sec: 0.268189 ( -0.0356307  0.0358766 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.81289e-06 ( -3.47289e-07  3.48176e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.26838     ( -0.270263   0.207453 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 2.26945E-03    ( -0.000273499   0.00235283 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.73 using 59 PHA bins.
# Reduced chi-squared =          1.156 for     56 degrees of freedom 
# Null hypothesis probability =   1.983687e-01
 
Photon flux (15-150 keV)    in 124.9 sec: 0.268921 ( -0.03644  0.03478 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.81166e-06 ( -3.45486e-07  3.47459e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 2.80257   ( -3.75713   -3.75713 )
beta        : -1.36159    ( -0.306171   0.259119 )
Epeak [keV] : 32.8573      ( -30.1028 286.756 )
Norm@50keV   : 1.57207    ( -1.57081   40.988 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.06 using 59 PHA bins.
# Reduced chi-squared =          1.165 for     55 degrees of freedom 
# Null hypothesis probability =   1.885142e-01
 
Photon flux (15-150 keV)    in 124.9 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)  = 6.15e-07
S(50-100 keV) = 1.02e-06

T90 vs. Hardness ratio plot

T90                                   = 86.1479999423027 sec.
Hardness ratio (energy fluence ratio) = 1.65854

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 2.20326
Count Ratio (50-100 keV) / (15-25 keV) = 1.7303

Mask shadow pattern

IMX = -1.0967747846, IMY = -0.0458682636365

TIME vs. PHA plot around the trigger time

TIME vs. DetID plot around the trigger time

100 us light curve (15-350 keV)

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:
-15.699410 5.432000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6644  22.0292    0.9  16.4   88.6   0.8499  13.3    1.9	Crab                          
101.1224  29.8462    2.5  21.7  141.9   0.2946   4.7 ------	UNKNOWN                       
 60.8816  -0.9467    2.4  34.7   20.5   0.3792   4.7 ------	UNKNOWN                       
 92.3813  18.8029    2.5   9.8  115.2   0.2664   4.5 ------	UNKNOWN                       
110.7411   9.3446    2.1  16.3 -146.5   0.2891   5.3 ------	UNKNOWN

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

Time interval of the image:
5.000000 50.000000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.8551  21.9865    0.0  16.3   89.0  -0.4061  -2.5   12.5	Crab                          
138.7590  33.7759    1.1  47.7  177.6   3.2131  10.2 ------	UNKNOWN                       
119.9310 -23.0162    2.1  40.8  -92.0   3.1327   5.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
405.600600 963.014700
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
128.1688 -10.4859    2.9  45.4   18.1   3.5153   3.9 ------	UNKNOWN                       
177.5889  82.6201    3.2  50.7 -170.7   3.8271   3.6 ------	UNKNOWN                       
160.8728 -17.4091    3.0  55.3  -22.5   5.6844   3.9 ------	UNKNOWN                       
228.6463  73.2451    4.7  57.8 -156.7   7.4169   2.5 ------	UNKNOWN                       
229.2524  73.3347    3.7  58.0 -156.9  10.6539   3.6 ------	UNKNOWN                       
180.9532  19.4796    2.7  40.0  -76.7   6.8764   4.3 ------	UNKNOWN                       
178.3298   7.6100    3.6  44.8  -60.2   6.7637   3.2 ------	UNKNOWN                       
197.1276  46.6697    3.4  45.3 -121.4   6.3513   3.5 ------	UNKNOWN

Plot creation:
Tue Nov 24 12:42:12 EST 2015