batgrbproduct analysis for trigger=261664

batgrbproduct Analysis for Trigger=261664

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 20 11:23:31 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger261664
======================================================================

  Trigger: 00261664      Segment: 000

  BAT Trigger Time: 193886102.464   [s; MET]
      Trigger Stop: 193886105.536   [s; MET]
               UTC: 2007-02-23T01:15:00.682000    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 153.452397388761   Dec: 43.1212182236162  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.24
     Image Trigger?:     NO
     Rate S/N Ratio:     8.42614977317636  [ if not an image trigger ]
     Image S/N Ratio:    7.24

  Flight Position:   [ source = BAT ]
    RA: 153.452397388761   Dec: 43.1212182236162  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 153.455316888074   Dec: 43.1318306437692  [deg; J2000]  
        { 10h 13m 49.3s , +43d 07' 54.6" }
         +/- 1.2612021298917 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.545916017402036 [arcmin] (formal 1-sigma fit error)
    SNR: 21.8343487872758
 
  Angular difference between Flight and Ground position is 0.649453 arcmin
 
  Partial Coding Fraction: 0.828125    [ including projection effects ]

  Duration
     T90: 128 +/- 32
        Measured from: 0.53600001335144
                   to: 128.536000013351     [s; relative to TRIGTIME]
     T50: 64 +/- 16
        Measured from: 0.53600001335144
                   to: 64.5360000133514     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 8.03600001335144     
                   to: 9.03600001335144     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.53600001335144     
                   to: 144.536000013351     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.116345   1.242207   0.762936   0.083699
           0.062358   0.066667   0.062453   0.066258 [error]
 Peak      0.020906   0.023665   0.005270   0.012255
           0.005769   0.006176   0.005838   0.005844 [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 3.56e-07 5.18e-07 5.61e-07 1.13e-06 1.78e-06 2.57e-06   erg/cm2
              Error 3.41e-08 3.24e-08 6.00e-08 2.47e-07 1.36e-07 3.06e-07   erg/cm2
Peak flux Power-law 1.68e-01 1.48e-01 8.98e-02 8.21e-02 4.41e-01 4.88e-01   ph/cm2/s
              Error 8.30e-02 4.91e-02 4.79e-02 1.04e-01 1.46e-01 1.72e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.42e-07 5.42e-07 5.50e-07 5.45e-07 1.70e-06 1.98e-06   erg/cm2
              Error 3.83e-08 4.24e-08 6.62e-08 5.25e-07 1.66e-07 5.29e-07   erg/cm2
Peak flux Cutoff-PL 1.71e-01 1.48e-01 8.75e-02 7.73e-02 4.41e-01 4.87e-01   ph/cm2/s
              Error 8.30e-02 5.36e-02 6.95e-02 1.03e-01 1.46e-01 1.96e-01   ph/cm2/s
 
Fluence        Band 3.35e-07 5.45e-07 5.35e-07 9.31e-07 1.73e-06 2.35e-06   erg/cm2
              Error -------- -------- 6.67e-08 -------- 1.48e-07 --------   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    1.885    0.123    -      -           1.35e-03 1.03e-04   57.150 57
CPL   1.480    0.497      54.4  -20.0      2.29e-03 1.63e-03   55.010 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.724    0.669    -      -           3.29e-03 1.34e-03   55.960 57
CPL   2.256    0.000      95.7    0.0      1.67e-03 0.00e+00   55.920 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: 36.672000 sec.
T50 in the 50-300 keV band: 25.600000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  144.000    0.536  144.536
T90   128.000    0.536  128.536
T50    64.000    0.536   64.536
Peak    1.000    8.036    9.036

Click here for the BAT GCN circular template

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  153.4553    43.1318   0.0088    28.1888   173.4214         1.7493860     21.834 TRIG_00261664                 
 
Foreground time interval of the image:
  0.536  39.837 (delta_t =  39.301 [sec])
Background time interval of the image:
-239.464   0.536 (delta_t = 240.000 [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 3.072000

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 3.072000

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 3.072000

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    0.536 sec. to  144.536 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.88541     ( -0.121763   0.124825 )
Norm@50keV  : 1.34831E-03    ( -0.000103625   0.000102269 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.15 using 59 PHA bins.
# Reduced chi-squared =          1.003 for     57 degrees of freedom 
# Null hypothesis probability =   4.694959e-01
 
Photon flux (15-150 keV)    in 144 sec: 0.192310 ( -0.0121166  0.012122 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.78488e-06 ( -1.34875e-07  1.37007e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.536 sec. to  144.536 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.48030     ( -0.533963   0.460457 )
Epeak [keV] : 54.4370      ( -14.446 -54.437 )
Norm@50keV  : 2.28684E-03    ( -0.000984374   0.00226667 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.01 using 59 PHA bins.
# Reduced chi-squared =         0.9823 for     56 degrees of freedom 
# Null hypothesis probability =   5.124095e-01
 
Photon flux (15-150 keV)    in 144 sec: 0.188058 ( -0.013026  0.013026 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.69713e-06 ( -1.63886e-07  1.68955e-07 ) ergs/cm2

Band function

Time interval is from    0.536 sec. to  144.536 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.60557   ( 1.48196   0.351133 )
beta        : -8.38713    ( 9.37123   19.3712 )
Epeak [keV] : 58.4833      ( -14.172 89.297 )
Norm@50keV   : 1.95559E-03    ( -0.000929977   0.000264194 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.18 using 59 PHA bins.
# Reduced chi-squared =          1.003 for     55 degrees of freedom 
# Null hypothesis probability =   4.676478e-01
 
Photon flux (15-150 keV)    in 144 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.72629e-06 ( -1.72528e-06  -1.47643e-07 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 10.4628  (-0.827335  0.911548)
R^2/D10^2   : 7.34088E-02  (-0.01987   0.0270452)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         104.26 using 59 PHA bins.
# Reduced chi-squared =         1.8291 for     57 degrees of freedom 
# Null hypothesis probability =   1.351028e-04
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.390e-07   2.671e-08
25- 50  6.325e-07   4.759e-08
50-150  3.758e-07   6.170e-08
15-150  1.247e-06   1.007e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 80.7987       (-16.6791      24.5071)
Norm        : 0.892219       (-0.0864715     0.100089)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.29 using 59 PHA bins.
# Reduced chi-squared =         0.9701 for     57 degrees of freedom 
# Null hypothesis probability =   5.393400e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.336e-07   3.312e-08
25- 50  5.505e-07   3.658e-08
50-150  7.822e-07   1.559e-07
15-150  1.666e-06   1.778e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.02647        (-1.07705      1.15064)
R1^2/D10^2  : 0.415241        (-0.187896      0.433772)
kT2 [keV]   : 20.7184        (-4.16584      6.99382)
R2^2/D10^2  : 4.09409E-03    (-0.00271786   0.0059552)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.65 using 59 PHA bins.
# Reduced chi-squared =         0.9754 for     55 degrees of freedom 
# Null hypothesis probability =   5.264319e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.385e-07   7.538e-08
25- 50  5.374e-07   1.009e-07
50-150  8.104e-07   4.106e-07
15-150  1.686e-06   5.037e-07

Peak spectrum fit

Power-law model

Time interval is from    8.036 sec. to    9.036 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.72394     ( -0.642816   0.694882 )
Norm@50keV  : 3.29368E-03    ( -0.00138624   0.00129416 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.96 using 59 PHA bins.
# Reduced chi-squared =         0.9818 for     57 degrees of freedom 
# Null hypothesis probability =   5.140417e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.441160 ( -0.14602  0.146028 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.04416e-08 ( -1.24007e-08  1.3628e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    8.036 sec. to    9.036 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.25650     (     )
Epeak [keV] : 95.6743      (   )
Norm@50keV  : 1.66897E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.92 using 59 PHA bins.
# Reduced chi-squared =         0.9985 for     56 degrees of freedom 
# Null hypothesis probability =   4.779798e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.440718 ( -0.145866  0.145935 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.0507e-08 ( -1.96281e-08  1.31623e-08 ) ergs/cm2

Band function

Time interval is from    8.036 sec. to    9.036 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 5.00000   ( -5   -5 )
beta        : -2.14568    ( 2.14566   0.882278 )
Epeak [keV] : 25.5264      ( -25.5222 66.2155 )
Norm@50keV   : 429.254    ( -137.898   4.13541e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.74 using 59 PHA bins.
# Reduced chi-squared =         0.9953 for     55 degrees of freedom 
# Null hypothesis probability =   4.845321e-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]    : 8.02541  (-2.25601  3.84018)
R^2/D10^2   : 0.476362  (-0.476365   1.25494)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.01 using 59 PHA bins.
# Reduced chi-squared =          1.000 for     57 degrees of freedom 
# Null hypothesis probability =   4.745815e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.561e-09   3.406e-09
25- 50  9.787e-09   6.085e-09
50-150  2.597e-09   2.085e-09
15-150  1.794e-08   1.154e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 99.9020       (-104.086      -104.086)
Norm        : 1.93885       (-0.71772     1.67932)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.34 using 59 PHA bins.
# Reduced chi-squared =         0.9884 for     57 degrees of freedom 
# Null hypothesis probability =   4.998388e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.068e-09   3.092e-09
25- 50  8.761e-09   5.265e-09
50-150  1.419e-08   1.146e-08
15-150  2.802e-08   1.930e-08

Double BB

------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.99683        (-2.2972      2.47451)
R1^2/D10^2  : 0.741960        (      )
kT2 [keV]   : 199.363        (-199.363      -199.363)
R2^2/D10^2  : 7.57552E-05    (-5.32488e-05   0.00614663)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.16 using 59 PHA bins.
#Fit statistic : Chi-Squared =          51.95 using 59 PHA bins.
# Reduced chi-squared =         0.9484 for     55 degrees of freedom 
# Reduced chi-squared =         0.9445 for     55 degrees of freedom 
# Null hypothesis probability =   5.838301e-01
# Null hypothesis probability =   5.920572e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.797e-09   3.609e-09
25- 50  8.876e-09   5.520e-09
50-150  2.176e-08   1.101e-08
15-150  3.644e-08   1.855e-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: 1.60600     ( -0.114963   0.116312 )
Norm@50keV  : 2.88688E-03    ( -0.000207411   0.000205955 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.08 using 59 PHA bins.
# Reduced chi-squared =         0.9313 for     57 degrees of freedom 
# Null hypothesis probability =   6.228165e-01
 
Photon flux (15-150 keV)    in 39.3 sec: 0.371670 ( -0.0246873  0.0246971 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.06028e-06 ( -8.21433e-08  8.31187e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.711029     ( -0.589892   0.514456 )
Epeak [keV] : 64.1671      ( -10.9844 28.9709 )
Norm@50keV  : 8.94901E-03    ( -0.00421733   0.00981829 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.43 using 59 PHA bins.
# Reduced chi-squared =         0.7755 for     56 degrees of freedom 
# Null hypothesis probability =   8.899903e-01
 
Photon flux (15-150 keV)    in 39.3 sec: 0.356695 ( -0.025983  0.026001 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.61502e-07 ( -9.45165e-08  9.78334e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.61956   ( -1.40256   -0.671075 )
beta        : -1.93331    ( -0.573111   0.239502 )
Epeak [keV] : 35.4506      ( -11.1922 22.81 )
Norm@50keV   : 0.384617    ( -0.375324   58.1261 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.10 using 59 PHA bins.
# Reduced chi-squared =         0.7292 for     55 degrees of freedom 
# Null hypothesis probability =   9.342699e-01
 
Photon flux (15-150 keV)    in 39.3 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.99839e-07 ( -9.99564e-07  -8.86097e-08 ) ergs/cm2

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

S(25-50 keV)  = 5.18e-07
S(50-100 keV) = 5.61e-07

T90 vs. Hardness ratio plot

T90                                   = 128 sec.
Hardness ratio (energy fluence ratio) = 1.08301

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.11274
Count Ratio (50-100 keV) / (15-25 keV) = 0.683423

Mask shadow pattern

IMX = -5.324156209013765E-01, IMY = -6.140106102854202E-02

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 3.072000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 3.072000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 3.072000

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:
-239.464000 0.536000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
217.2460  14.4485    2.9  33.7  -23.4   1.0229   3.9 ------	UNKNOWN

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

Time interval of the image:
0.536000 39.836590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
153.4553  43.1319    0.5  28.2  173.4   1.7495  21.8 ------	UNKNOWN                       
232.5857  10.9807    2.7  48.3  -30.8   0.7674   4.3 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
98.636590 293.636590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
146.0362  42.0240    2.0   5.6  175.5   0.8297   5.7 ------	UNKNOWN

Plot creation:
Sun May 31 10:48:12 EDT 2015