batgrbproduct analysis for trigger=295527

batgrbproduct Analysis for Trigger=295527

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): Thu Sep 11 13:40:03 EDT 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger295527
======================================================================

  Trigger: 00295527      Segment: 000

  BAT Trigger Time: 215286064   [s; MET]
      Trigger Stop: 215286128   [s; MET]
               UTC: 2007-10-28T17:41:01.676940    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 119.846989722008   Dec: 21.4977976788415  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.74
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.74

  Flight Position:   [ source = BAT ]
    RA: 119.846989722008   Dec: 21.4977976788415  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 119.826257143885   Dec: 21.4700100994003  [deg; J2000]  
        { 07h 59m 18.3s , +21d 28' 12.0" }
         +/- 2.12272880669816 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.826427987752839 [arcmin] (formal 1-sigma fit error)
    SNR: 10.3782999346458
 
  Angular difference between Flight and Ground position is 2.029681 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 26.8560000061989 +/- 5.42508909639097
        Measured from: 20.16400000453
                   to: 47.0200000107288     [s; relative to TRIGTIME]
     T50: 15.2919999957085 +/- 5.75422487826452
        Measured from: 26.5160000026226
                   to: 41.8079999983311     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 41.7520000040531     
                   to: 42.7520000040531     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 19.2400000095367     
                   to: 48.8840000033379     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.191844   0.233980   0.108260   0.005315
           0.025693   0.026927   0.024069   0.022249 [error]
 Peak      0.019752   0.013557   0.004231   0.005377
           0.004640   0.004814   0.004343   0.004063 [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 5.46e-08 8.42e-08 9.74e-08 2.16e-07 3.00e-07 4.53e-07   erg/cm2
              Error 1.05e-08 1.16e-08 2.21e-08 9.75e-08 5.17e-08 1.21e-07   erg/cm2
Peak flux Power-law 1.45e-01 9.32e-02 3.89e-02 2.21e-02 2.88e-01 2.99e-01   ph/cm2/s
              Error 6.38e-02 3.99e-02 3.16e-02 3.81e-02 1.07e-01 1.17e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.05e-08 9.56e-08 9.10e-08 4.13e-08 2.66e-07 2.78e-07   erg/cm2
              Error 1.19e-08 1.72e-08 2.81e-08 1.20e-07 5.86e-08 1.68e-07   erg/cm2
Peak flux Cutoff-PL 1.45e-01 9.28e-02 3.81e-02 2.10e-02 2.88e-01 2.98e-01   ph/cm2/s
              Error 6.39e-02 4.59e-02 3.72e-02 3.78e-02 1.06e-01 1.16e-01   ph/cm2/s
 
Fluence        Band 4.97e-08 9.62e-08 8.86e-08 8.24e-08 2.70e-07 3.19e-07   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    1.789    0.247    -      -           1.10e-03 1.83e-04   47.640 57
CPL   0.736    1.345      49.0  -18.4      4.55e-03 1.95e-02   45.150 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.261    0.891    -      -           1.68e-03 1.05e-03   61.350 57
CPL   1.987    0.000       2.0    0.0      2.45e-03 0.00e+00   61.440 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   29.644   19.240   48.884
T90    26.856   20.164   47.020
T50    15.292   26.516   41.808
Peak    1.000   41.752   42.752

Click here for the BAT GCN circular template

Special notes of this burst

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  119.8263    21.4700   0.0185    11.4015    -4.0243         0.5115543     10.378 TRIG_00295527                 
 
Foreground time interval of the image:
 19.240  48.884 (delta_t =  29.644 [sec])
Background time interval of the image:
-239.000  19.240 (delta_t = 258.240 [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   19.240 sec. to   48.884 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.78946     ( -0.239844   0.253905 )
Norm@50keV  : 1.09940E-03    ( -0.000185687   0.000181161 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.64 using 59 PHA bins.
# Reduced chi-squared =         0.8359 for     57 degrees of freedom 
# Null hypothesis probability =   8.067659e-01
 
Photon flux (15-150 keV)    in 29.64 sec: 0.150880 ( -0.0206455  0.0206456 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.00111e-07 ( -5.08044e-08  5.25369e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   19.240 sec. to   48.884 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.735859     ( -1.5698   1.12079 )
Epeak [keV] : 49.0306      ( -12.3017 -49.029 )
Norm@50keV  : 4.54794E-03    ( -0.00454896   0.0343789 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.15 using 59 PHA bins.
# Reduced chi-squared =         0.8062 for     56 degrees of freedom 
# Null hypothesis probability =   8.500175e-01
 
Photon flux (15-150 keV)    in 29.64 sec: 0.145213 ( -0.021364  0.021472 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.66012e-07 ( -5.4398e-08  6.27879e-08 ) ergs/cm2

Band function

Time interval is from   19.240 sec. to   48.884 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.165955   ( -0.178732   -0.178732 )
beta        : -2.36368    ( 2.3521   0.607853 )
Epeak [keV] : 41.3610      ( -39.6008 116.824 )
Norm@50keV   : 1.10285E-02    ( -0.0108648   99.5407 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.94 using 59 PHA bins.
# Reduced chi-squared =         0.8170 for     55 degrees of freedom 
# Null hypothesis probability =   8.315979e-01
 
Photon flux (15-150 keV)    in 29.64 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.70488e-07 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 10.6737  (-1.50487  1.79451)
R^2/D10^2   : 5.74402E-02  (-0.0252898   0.043581)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.15 using 59 PHA bins.
# Reduced chi-squared =         0.8797 for     57 degrees of freedom 
# Null hypothesis probability =   7.279365e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.026e-08   9.627e-09
25- 50  1.094e-07   2.189e-08
50-150  6.879e-08   2.558e-08
15-150  2.185e-07   4.281e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 89.9466       (-33.9453      82.251)
Norm        : 0.689834       (-0.121111     0.156121)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.71 using 59 PHA bins.
# Reduced chi-squared =         0.8019 for     57 degrees of freedom 
# Null hypothesis probability =   8.584009e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.335e-08   1.077e-08
25- 50  9.022e-08   1.632e-08
50-150  1.373e-07   7.317e-08
15-150  2.809e-07   9.642e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.79614        (-5.51832      4.13143)
R1^2/D10^2  : 0.183918        (-0.118376      663.475)
kT2 [keV]   : 18.0091        (-15.9873      -18.6905)
R2^2/D10^2  : 5.21066E-03    (-0.004158   0.0542468)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.72 using 59 PHA bins.
# Reduced chi-squared =         0.8313 for     55 degrees of freedom 
# Null hypothesis probability =   8.092595e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.921e-08   2.681e-08
25- 50  9.704e-08   5.186e-08
50-150  1.168e-07   7.057e-08
15-150  2.630e-07   1.321e-07

Peak spectrum fit

Power-law model

Time interval is from   41.752 sec. to   42.752 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.26065     ( -0.741752   1.0399 )
Norm@50keV  : 1.68410E-03    ( -0.00105366   0.00104396 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.35 using 59 PHA bins.
# Reduced chi-squared =          1.076 for     57 degrees of freedom 
# Null hypothesis probability =   3.227601e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.288003 ( -0.106646  0.107216 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.59825e-08 ( -7.72781e-09  9.16112e-09 ) ergs/cm2

Cutoff power-law model

Time interval is from   41.752 sec. to   42.752 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.98656     (     )
Epeak [keV] : 1.97100      (   )
Norm@50keV  : 2.45238E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.44 using 59 PHA bins.
# Reduced chi-squared =          1.097 for     56 degrees of freedom 
# Null hypothesis probability =   2.875622e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.287655 ( -0.106377  0.106422 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.5959e-08 ( -8.82694e-09  9.0073e-09 ) ergs/cm2

Band function

Time interval is from   41.752 sec. to   42.752 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.27050   ( -0.72911   1.2705 )
beta        : -2.26063    ( -1.04205   0.742205 )
Epeak [keV] : 1.09744      ( -1.09744 -1.09744 )
Norm@50keV   : 0.146973    ( -0.146973   1.18164e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.35 using 59 PHA bins.
# Reduced chi-squared =          1.116 for     55 degrees of freedom 
# Null hypothesis probability =   2.588060e-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]    : 6.33461  (-2.2655  3.71761)
R^2/D10^2   : 0.804904  (-0.803748   4.51344)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.67 using 59 PHA bins.
# Reduced chi-squared =          1.100 for     57 degrees of freedom 
# Null hypothesis probability =   2.821136e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.621e-09   2.851e-09
25- 50  5.174e-09   3.435e-09
50-150  5.889e-10   5.510e-10
15-150  1.038e-08   6.420e-09

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 36.6652       (-36.7108      -36.7108)
Norm        : 1.96406       (-1.04316     3.5209)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.72 using 59 PHA bins.
# Reduced chi-squared =          1.083 for     57 degrees of freedom 
# Null hypothesis probability =   3.112646e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.371e-09   2.742e-09
25- 50  5.530e-09   3.617e-09
50-150  3.879e-09   3.232e-09
15-150  1.378e-08   9.380e-09

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.32366        (-5.32828      3.27396)
R1^2/D10^2  : 1.47754        (-1.47509      -1.47509)
kT2 [keV]   : 32.8162        (-32.9983      -32.9983)
R2^2/D10^2  : 1.15197E-03    (-0.00113665   1.94782)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.64 using 59 PHA bins.
# Reduced chi-squared =          1.103 for     55 degrees of freedom 
# Null hypothesis probability =   2.798485e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.772e-09   3.009e-09
25- 50  4.658e-09   2.480e-09
50-150  8.748e-09   7.170e-09
15-150  1.818e-08   1.009e-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: 1.78946     ( -0.239844   0.253905 )
Norm@50keV  : 1.09940E-03    ( -0.000185687   0.000181161 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.64 using 59 PHA bins.
# Reduced chi-squared =         0.8359 for     57 degrees of freedom 
# Null hypothesis probability =   8.067659e-01
 
Photon flux (15-150 keV)    in 29.64 sec: 0.150880 ( -0.0206455  0.0206456 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.00111e-07 ( -5.08044e-08  5.25369e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.735859     ( -1.5698   1.12079 )
Epeak [keV] : 49.0306      ( -12.3017 -49.029 )
Norm@50keV  : 4.54794E-03    ( -0.00454896   0.0343789 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.15 using 59 PHA bins.
# Reduced chi-squared =         0.8062 for     56 degrees of freedom 
# Null hypothesis probability =   8.500175e-01
 
Photon flux (15-150 keV)    in 29.64 sec: 0.145213 ( -0.021364  0.021472 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.66012e-07 ( -5.4398e-08  6.27879e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.165955   ( -0.178732   -0.178732 )
beta        : -2.36368    ( 2.3521   0.607853 )
Epeak [keV] : 41.3610      ( -39.6008 129.433 )
Norm@50keV   : 1.10285E-02    ( -0.0108648   99.5407 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.94 using 59 PHA bins.
# Reduced chi-squared =         0.8170 for     55 degrees of freedom 
# Null hypothesis probability =   8.315979e-01
 
Photon flux (15-150 keV)    in 29.64 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.70488e-07 ( 0  0 ) ergs/cm2

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

S(25-50 keV)  = 8.42e-08
S(50-100 keV) = 9.74e-08

T90 vs. Hardness ratio plot

T90                                   = 26.8560000061989 sec.
Hardness ratio (energy fluence ratio) = 1.15677

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.21964
Count Ratio (50-100 keV) / (15-25 keV) = 0.564313

Mask shadow pattern

IMX = 2.011658195984532E-01, IMY = 1.415253510473943E-02

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:
-239.000000 19.240000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6301  22.0265    0.4  33.6   77.2  10.7364  26.4    0.7	Crab                          
 81.5688  12.8516    2.5  40.1   65.9   3.3711   4.6 ------	UNKNOWN                       
 70.1038  49.8266    2.8  40.0  126.9   2.3308   4.1 ------	UNKNOWN                       
 65.0647  66.3380    2.7  46.2  149.8   2.2964   4.3 ------	UNKNOWN                       
160.7959  15.0240    4.1  41.3  -77.7   2.4088   2.8 ------	UNKNOWN

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

Time interval of the image:
19.240000 48.884000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.7536  22.1660    0.0  33.4   77.3  -0.1459  -1.2   11.3	Crab                          
119.8263  21.4700    1.1  11.4   -4.0   0.5115  10.4 ------	UNKNOWN                       
186.8089  77.5720    2.0  53.1 -168.9   0.8462   5.8 ------	UNKNOWN                       
150.8875  33.1480    2.6  26.1 -102.5   0.3158   4.5 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
106.900600 758.600590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6328  22.0129    0.4  33.6   86.7  22.9678  27.3    0.1	Crab                          
 90.3696  63.9695    3.2  46.8  151.7   4.2878   3.6 ------	UNKNOWN                       
172.4131  71.9216    3.5  58.4 -174.3   6.9140   3.4 ------	UNKNOWN                       
172.9109  71.6556    3.3  58.4 -173.9   8.8754   4.2 ------	UNKNOWN                       
181.2965  47.7526    6.8  55.2 -145.1   4.8551   1.7 ------	UNKNOWN

Plot creation:
Sun May 31 08:48:38 EDT 2015