batgrbproduct analysis for trigger=597722

batgrbproduct Analysis for Trigger=597722

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): Sat Oct  4 23:14:34 EDT 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger597722
======================================================================

  Trigger: 00597722      Segment: 000

  BAT Trigger Time: 420582828.48   [s; MET]
      Trigger Stop: 420582828.992   [s; MET]
               UTC: 2014-04-30T20:33:36.527160    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 102.929387590687   Dec: 23.0094966592596  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.01
     Image Trigger?:     NO
     Rate S/N Ratio:     15.7162336455017  [ if not an image trigger ]
     Image S/N Ratio:    9.01

  Flight Position:   [ source = BAT ]
    RA: 102.929387590687   Dec: 23.0094966592596  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 102.937944482399   Dec: 23.0365183284277  [deg; J2000]  
        { 06h 51m 45.1s , +23d 02' 11.5" }
         +/- 1.03827433826553 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.403022539645457 [arcmin] (formal 1-sigma fit error)
    SNR: 28.8280556055997
 
  Angular difference between Flight and Ground position is 1.688754 arcmin
 
  Partial Coding Fraction: 1.03125    [ including projection effects ]

  Duration
     T90: 173.587999939919 +/- 3.7074196198355
        Measured from: 0.435999989509583
                   to: 174.023999929428     [s; relative to TRIGTIME]
     T50: 151.607999920845 +/- 8.96403928269971
        Measured from: 2.37199997901917
                   to: 153.979999899864     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.43999999761581     
                   to: 3.43999999761581     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.304000020027161     
                   to: 177.575999975204     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.857825   0.876561   0.443856   0.167611
           0.076080   0.080175   0.075188   0.079717 [error]
 Peak      0.077636   0.139918   0.080152   0.026840
           0.006830   0.007719   0.007102   0.006444 [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 2.53e-07 3.42e-07 3.40e-07 6.12e-07 1.13e-06 1.55e-06   erg/cm2
              Error 3.71e-08 3.65e-08 7.12e-08 2.55e-07 1.57e-07 3.33e-07   erg/cm2
Peak flux Power-law 7.64e-01 8.19e-01 6.23e-01 7.72e-01 2.50e+00 2.98e+00   ph/cm2/s
              Error 8.91e-02 5.99e-02 5.71e-02 1.43e-01 1.74e-01 2.22e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.52e-07 3.42e-07 3.39e-07 6.01e-07 1.13e-06 1.49e-06   erg/cm2
              Error 3.67e-08 3.65e-08 7.07e-08 3.75e-07 1.16e-07 4.07e-07   erg/cm2
Peak flux Cutoff-PL 7.05e-01 8.76e-01 6.38e-01 3.58e-01 2.43e+00 2.58e+00   ph/cm2/s
              Error 1.02e-01 7.93e-02 6.29e-02 2.46e-01 1.83e-01 2.99e-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    2.006    0.224    -      -           6.91e-04 1.02e-04   54.940 57
CPL   2.120    0.000      52.4    0.0      5.77e-04 0.00e+00   54.250 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.395    0.120    -      -           2.05e-02 1.49e-03   65.120 57
CPL   0.790    0.559      92.3  126.3      4.36e-02 3.44e-02   61.010 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: 2.944000 sec.
T50 in the 50-300 keV band: 1.600000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  177.880   -0.304  177.576
T90   173.588    0.436  174.024
T50   151.608    2.372  153.980
Peak    1.000    2.440    3.440

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
  102.9379    23.0365   0.0066     9.1187    19.6796         1.2950529     28.828 TRIG_00597722                 
 
Foreground time interval of the image:
 -0.304  10.021 (delta_t =  10.325 [sec])
Background time interval of the image:
-179.480  -0.304 (delta_t = 179.176 [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)

The mask-weighted light curves based on cleaned DPHs

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   -0.304 sec. to  177.576 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.00561     ( -0.217254   0.230441 )
Norm@50keV  : 6.90716E-04    ( -0.000103272   0.000100327 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.94 using 59 PHA bins.
# Reduced chi-squared =         0.9638 for     57 degrees of freedom 
# Null hypothesis probability =   5.528264e-01
 
Photon flux (15-150 keV)    in 177.9 sec: 0.103876 ( -0.0106761  0.0106766 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.13351e-06 ( -1.5425e-07  1.60302e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.304 sec. to  177.576 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.12040     (     )
Epeak [keV] : 52.4010      (   )
Norm@50keV  : 5.77003E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.25 using 59 PHA bins.
# Reduced chi-squared =         0.9688 for     56 degrees of freedom 
# Null hypothesis probability =   5.412049e-01
 
Photon flux (15-150 keV)    in 177.9 sec: 0.103789 ( -0.0106687  0.010675 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.1341e-06 ( -7.88666e-08  1.53152e-07 ) ergs/cm2

Band function

Time interval is from   -0.304 sec. to  177.576 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.60892   ( 1.52595   1.52595 )
beta        : -2.01349    ( 2.00556   0.216876 )
Epeak [keV] : 21.1457      ( -12.929 -12.929 )
Norm@50keV   : 1.44498E-03    ( -0.00058802   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.92 using 59 PHA bins.
# Reduced chi-squared =         0.9985 for     55 degrees of freedom 
# Null hypothesis probability =   4.776760e-01
 
Photon flux (15-150 keV)    in 177.9 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]    : 8.50566  (-1.09684  1.28112)
R^2/D10^2   : 8.57682E-02  (-0.0359576   0.0618466)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          81.25 using 59 PHA bins.
# Reduced chi-squared =          1.425 for     57 degrees of freedom 
# Null hypothesis probability =   1.914815e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.081e-07   3.751e-08
25- 50  4.040e-07   5.888e-08
50-150  1.293e-07   4.514e-08
15-150  7.415e-07   1.069e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 62.4774       (-19.9195      37.3585)
Norm        : 0.526771       (-0.0924972     0.118155)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.17 using 59 PHA bins.
# Reduced chi-squared =          1.038 for     57 degrees of freedom 
# Null hypothesis probability =   3.963821e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.370e-07   3.300e-08
25- 50  3.651e-07   4.359e-08
50-150  4.295e-07   1.446e-07
15-150  1.032e-06   1.677e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.42167        (-1.56653      1.38826)
R1^2/D10^2  : 0.226691        (-0.11526      0.403392)
kT2 [keV]   : 47.3618        (-29.0743      -48.885)
R2^2/D10^2  : 1.79284E-04    (-0.000154255   0.00236654)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.77 using 59 PHA bins.
# Reduced chi-squared =         0.9957 for     55 degrees of freedom 
# Null hypothesis probability =   4.835652e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.502e-07   6.339e-08
25- 50  3.370e-07   9.776e-08
50-150  7.060e-07   3.826e-07
15-150  1.293e-06   5.012e-07

Peak spectrum fit

Power-law model

Time interval is from    2.440 sec. to    3.440 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.39490     ( -0.11938   0.119909 )
Norm@50keV  : 2.05371E-02    ( -0.00149145   0.00148451 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.12 using 59 PHA bins.
# Reduced chi-squared =          1.142 for     57 degrees of freedom 
# Null hypothesis probability =   2.150654e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.49814 ( -0.174311  0.174384 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.98651e-07 ( -1.63568e-08  1.65404e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    2.440 sec. to    3.440 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.789959     ( -0.604819   0.51393 )
Epeak [keV] : 92.2979      ( -26.2983 226.241 )
Norm@50keV  : 4.35775E-02    ( -0.0202312   0.0485929 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.01 using 59 PHA bins.
# Reduced chi-squared =          1.089 for     56 degrees of freedom 
# Null hypothesis probability =   3.007669e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.43378 ( -0.18374  0.18302 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.8548e-07 ( -2.0087e-08  2.0038e-08 ) ergs/cm2

Band function

Time interval is from    2.440 sec. to    3.440 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.06453   ( -2.58847   -2.09095 )
beta        : -1.76144    ( -0.259054   0.129527 )
Epeak [keV] : 43.5073      ( -12.5361 23.8963 )
Norm@50keV   : 0.703005    ( -0.705629   244.32 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.25 using 59 PHA bins.
# Reduced chi-squared =         0.9863 for     55 degrees of freedom 
# Null hypothesis probability =   5.033440e-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]    : 13.5522  (-1.11756  1.26603)
R^2/D10^2   : 0.412735  (-0.110982   0.145704)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          86.34 using 59 PHA bins.
# Reduced chi-squared =          1.515 for     57 degrees of freedom 
# Null hypothesis probability =   7.312534e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.605e-08   2.120e-09
25- 50  5.777e-08   5.190e-09
50-150  6.867e-08   1.069e-08
15-150  1.425e-07   1.295e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 10.1926       (-0.711655     0.711656)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.49 using 59 PHA bins.
# Reduced chi-squared =          1.149 for     57 degrees of freedom 
# Null hypothesis probability =   2.060406e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.546e-08   2.145e-09
25- 50  4.898e-08   7.445e-09
50-150  1.074e-07   3.392e-08
15-150  1.819e-07   5.098e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 10.0184        (-1.51106      1.46973)
R1^2/D10^2  : 0.949969        (-0.313924      0.547384)
kT2 [keV]   : 55.6314        (-27.3112      -58.6723)
R2^2/D10^2  : 3.05261E-03    (-0.00229242   0.0129137)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.79 using 59 PHA bins.
# Reduced chi-squared =         0.9235 for     55 degrees of freedom 
# Null hypothesis probability =   6.360449e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.038e-08   3.790e-09
25- 50  5.545e-08   1.066e-08
50-150  1.199e-07   5.778e-08
15-150  1.958e-07   6.619e-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: 1.59577     ( -0.0987583   0.0998099 )
Norm@50keV  : 7.73335E-03    ( -0.00043054   0.000427728 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.47 using 59 PHA bins.
# Reduced chi-squared =          1.219 for     57 degrees of freedom 
# Null hypothesis probability =   1.242541e-01
 
Photon flux (15-150 keV)    in 10.32 sec: 0.992473 ( -0.0518932  0.0519407 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.46762e-07 ( -4.54142e-08  4.58825e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.31196     ( -0.425725   0.328365 )
Epeak [keV] : 114.611      ( -43.1088 -114.611 )
Norm@50keV  : 1.08792E-02    ( -0.00341532   0.00710276 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.95 using 59 PHA bins.
# Reduced chi-squared =          1.213 for     56 degrees of freedom 
# Null hypothesis probability =   1.314923e-01
 
Photon flux (15-150 keV)    in 10.32 sec: 0.974839 ( -0.057123  0.056991 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.23637e-07 ( -5.5278e-08  5.55763e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.24950   ( 1.25088   1.25088 )
beta        : -1.85291    ( 1.85664   0.319777 )
Epeak [keV] : 98.6002      ( -99.2582 254.105 )
Norm@50keV   : 1.18342E-02    ( -0.00370888   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.72 using 59 PHA bins.
# Reduced chi-squared =          1.231 for     55 degrees of freedom 
# Null hypothesis probability =   1.164964e-01
 
Photon flux (15-150 keV)    in 10.32 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)  = 3.42e-07
S(50-100 keV) = 3.40e-07

T90 vs. Hardness ratio plot

T90                                   = 173.587999939919 sec.
Hardness ratio (energy fluence ratio) = 0.994152

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.02184
Count Ratio (50-100 keV) / (15-25 keV) = 0.51742

Mask shadow pattern

IMX = 1.511338956559928E-01, IMY = -5.405304042056846E-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:
-179.480000 -0.304000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6298  22.0065    0.5  15.6  -69.3   6.1255  23.5    0.5	Crab                          
146.9509  43.4228    3.2  50.1   37.2   4.1878   3.6 ------	UNKNOWN                       
143.4363  45.6388    3.1  48.6   33.2   3.6576   3.7 ------	UNKNOWN                       
123.8181  28.4858    2.6  27.1   47.9   1.2808   4.4 ------	UNKNOWN                       
103.2026  43.8474    3.0  29.1   -0.9   1.0431   3.8 ------	UNKNOWN                       
 87.4598  -3.4380    2.2  21.4 -157.0   1.1408   5.2 ------	UNKNOWN                       
 84.6893  31.5669    2.5  20.7  -42.8   1.1954   4.7 ------	UNKNOWN                       
 55.0304  30.4941    3.1  42.5  -69.1   4.0850   3.8 ------	UNKNOWN

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

Time interval of the image:
-0.304000 10.020600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.7102  22.0497    4.8  15.5  -69.1   0.1030   2.4    4.8	Crab                          
102.9379  23.0365    0.4   9.1   19.7   1.2952  28.8 ------	UNKNOWN                       
 56.1100  14.2489    2.3  40.8  -93.6   0.9758   5.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
39.820610 497.320600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6331  22.0156    0.2  17.8  -94.3  19.2958  48.6    0.1	Crab                          
136.0031   8.4562    3.0  34.9  104.4   3.6354   3.8 ------	UNKNOWN                       
123.8870  64.8678    2.6  44.0    7.7   2.9215   4.5 ------	UNKNOWN                       
 98.1385 -25.9798    3.1  49.2 -179.2   3.4108   3.7 ------	UNKNOWN                       
 68.7343 -21.0558    4.5  55.2 -145.2   7.4792   2.6 ------	UNKNOWN

Plot creation:
Sat May 30 13:41:11 EDT 2015