batgrbproduct analysis for trigger=145581

batgrbproduct Analysis for Trigger=145581

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): Wed Jan 22 21:46:50 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger145581
======================================================================

  Trigger: 00145581      Segment: 000

  BAT Trigger Time: 142869627.136   [s; MET]
      Trigger Stop: 142869654.016   [s; MET]
               UTC: 2005-07-12T14:00:27.517820    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 77.6928992397336   Dec: 64.898850024641  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.89
     Image Trigger?:     NO
     Rate S/N Ratio:     11.7898261225516  [ if not an image trigger ]
     Image S/N Ratio:    8.89

  Flight Position:   [ source = BAT ]
    RA: 77.6928992397336   Dec: 64.898850024641  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 77.7221924188025   Dec: 64.9273059944435  [deg; J2000]  
        { 05h 10m 53.3s , +64d 55' 38.3" }
         +/- 1.69697651428425 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.74800414987494 [arcmin] (formal 1-sigma fit error)
    SNR: 14.2892702092692
 
  Angular difference between Flight and Ground position is 1.862902 arcmin
 
  Partial Coding Fraction: 0.46875    [ including projection effects ]

  Duration
     T90: 51.3560000061989 +/- 7.86838358834463
        Measured from: -12.9839999973774
                   to: 38.3720000088215     [s; relative to TRIGTIME]
     T50: 26.9280000030994 +/- 6.96220945189602
        Measured from: -1.95600000023842
                   to: 24.972000002861     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 17.3879999816418     
                   to: 18.3879999816418     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -20.444000005722     
                   to: 40.1239999830723     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.403036   0.634953   0.475121   0.119167
           0.052820   0.055280   0.049318   0.043393 [error]
 Peak      0.022065   0.026576   0.011826   0.010359
           0.006927   0.006970   0.006228   0.005321 [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 1.46e-07 2.69e-07 3.82e-07 1.14e-06 1.09e-06 1.94e-06   erg/cm2
              Error 2.54e-08 2.81e-08 4.95e-08 3.22e-07 1.20e-07 3.58e-07   erg/cm2
Peak flux Power-law 2.45e-01 1.84e-01 9.19e-02 6.56e-02 5.52e-01 5.87e-01   ph/cm2/s
              Error 8.40e-02 6.05e-02 3.79e-02 7.49e-02 1.81e-01 1.95e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.46e-07 2.70e-07 3.81e-07 1.13e-06 1.09e-06 1.83e-06   erg/cm2
              Error 1.71e-08 3.01e-08 5.12e-08 1.88e-07 1.22e-07 5.23e-07   erg/cm2
Peak flux Cutoff-PL 2.22e-01 2.24e-01 7.85e-02 7.21e-03 5.32e-01 5.31e-01   ph/cm2/s
              Error 1.71e-01 1.01e-01 7.22e-02 5.74e-02 1.94e-01 2.03e-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    1.496    0.176    -      -           1.90e-03 1.90e-04   57.800 57
CPL   1.445    0.000     550.2    0.0      2.01e-03 0.00e+00   57.840 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.001    0.587    -      -           3.68e-03 1.51e-03   68.020 57
CPL   0.327    1.374      38.0    0.0      3.90e-02 0.00e+00   66.860 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: 56.320000 sec.
T50 in the 50-300 keV band: 28.992000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   60.568  -20.444   40.124
T90    51.356  -12.984   38.372
T50    26.928   -1.956   24.972
Peak    1.000   17.388   18.388

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
   77.7222    64.9273   0.0134    38.3947  -141.0804         1.7209023     14.289 TRIG_00145581                 
 
Foreground time interval of the image:
-20.444  40.124 (delta_t =  60.568 [sec])
Background time interval of the image:
-299.136 -20.444 (delta_t = 278.692 [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 26.880000

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 26.880000

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 26.880000

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  -20.444 sec. to   40.124 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.49638     ( -0.175702   0.17681 )
Norm@50keV  : 1.89709E-03    ( -0.000190186   0.000189299 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.80 using 59 PHA bins.
# Reduced chi-squared =          1.014 for     57 degrees of freedom 
# Null hypothesis probability =   4.454281e-01
 
Photon flux (15-150 keV)    in 60.57 sec: 0.236601 ( -0.0239176  0.0239786 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.09071e-06 ( -1.19176e-07  1.20096e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -20.444 sec. to   40.124 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.44500     (     )
Epeak [keV] : 550.180      (   )
Norm@50keV  : 2.01268E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.84 using 59 PHA bins.
# Reduced chi-squared =          1.033 for     56 degrees of freedom 
# Null hypothesis probability =   4.070295e-01
 
Photon flux (15-150 keV)    in 60.57 sec: 0.236593 ( -0.024459  0.023875 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.08912e-06 ( -1.2389e-07  1.2111e-07 ) ergs/cm2

Band function

Time interval is from  -20.444 sec. to   40.124 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.93251   ( -4.93251   -4.93251 )
beta        : -1.52282    ( -0.191565   0.184271 )
Epeak [keV] : 20.8428      ( -20.8428 6.15253 )
Norm@50keV   : 545.254    ( -53.2946   995429 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.60 using 59 PHA bins.
# Reduced chi-squared =          1.047 for     55 degrees of freedom 
# Null hypothesis probability =   3.792507e-01
 
Photon flux (15-150 keV)    in 60.57 sec: 0.236465 (    ) 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]    : 15.7909  (-2.20819  2.61061)
R^2/D10^2   : 2.18661E-02  (-0.00898748   0.0152349)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          91.81 using 59 PHA bins.
# Reduced chi-squared =          1.611 for     57 degrees of freedom 
# Null hypothesis probability =   2.370965e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.848e-08   1.453e-08
25- 50  2.849e-07   4.243e-08
50-150  4.940e-07   9.561e-08
15-150  8.474e-07   1.145e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 0.968603       (-0.0949203     0.0949147)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.98 using 59 PHA bins.
# Reduced chi-squared =          1.035 for     57 degrees of freedom 
# Null hypothesis probability =   4.028438e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.461e-07   5.617e-08
25- 50  2.811e-07   1.204e-07
50-150  6.164e-07   3.330e-07
15-150  1.044e-06   4.621e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.73893        (-1.673      1.92208)
R1^2/D10^2  : 0.300807        (-0.175913      0.570994)
kT2 [keV]   : 29.5447        (-7.00676      14.0613)
R2^2/D10^2  : 2.10219E-03    (-0.00147779   0.00329389)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.55 using 59 PHA bins.
# Reduced chi-squared =          1.028 for     55 degrees of freedom 
# Null hypothesis probability =   4.169540e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.451e-07   6.885e-08
25- 50  2.697e-07   9.658e-08
50-150  6.906e-07   3.588e-07
15-150  1.105e-06   4.059e-07

Peak spectrum fit

Power-law model

Time interval is from   17.388 sec. to   18.388 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.00149     ( -0.537988   0.635481 )
Norm@50keV  : 3.67768E-03    ( -0.00153992   0.00147723 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.02 using 59 PHA bins.
# Reduced chi-squared =          1.193 for     57 degrees of freedom 
# Null hypothesis probability =   1.506281e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.552026 ( -0.180718  0.180748 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.39233e-08 ( -1.28345e-08  1.36531e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   17.388 sec. to   18.388 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.326990     ( -0.297708   2.4501 )
Epeak [keV] : 37.9724      (   )
Norm@50keV  : 3.89810E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.86 using 59 PHA bins.
# Reduced chi-squared =          1.194 for     56 degrees of freedom 
# Null hypothesis probability =   1.518343e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.531531 ( -0.20433  0.183774 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.89357e-08 ( -1.37163e-08  1.55746e-08 ) ergs/cm2

Band function

Time interval is from   17.388 sec. to   18.388 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.87074   ( -6.86011   -4.87074 )
beta        : -2.65024    ( 2.65024   0.902825 )
Epeak [keV] : 28.1733      ( -28.1733 10.4674 )
Norm@50keV   : 256.566    ( -80.6543   5.76009e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.90 using 59 PHA bins.
# Reduced chi-squared =          1.198 for     55 degrees of freedom 
# Null hypothesis probability =   1.491112e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.96512e-08 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 8.68969  (-2.44708  4.01105)
R^2/D10^2   : 0.464236  (-0.464298   1.22954)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.15 using 59 PHA bins.
# Reduced chi-squared =          1.178 for     57 degrees of freedom 
# Null hypothesis probability =   1.682357e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.695e-09   4.214e-09
25- 50  1.346e-08   8.440e-09
50-150  4.606e-09   3.598e-09
15-150  2.476e-08   1.543e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 59.8785       (-34.1936      -59.8791)
Norm        : 2.95920       (-1.21422     2.24361)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.16 using 59 PHA bins.
# Reduced chi-squared =          1.178 for     57 degrees of freedom 
# Null hypothesis probability =   1.680896e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.435e-09   4.650e-09
25- 50  1.131e-08   7.165e-09
50-150  1.285e-08   1.127e-08
15-150  3.159e-08   2.130e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.23164        (-7.22897      4.16568)
R1^2/D10^2  : 0.786262        (-0.787      -0.787)
kT2 [keV]   : 23.9977        (-23.9578      -23.9578)
R2^2/D10^2  : 4.30435E-03    (-0.00433234   1.20188)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.92 using 59 PHA bins.
# Reduced chi-squared =          1.199 for     55 degrees of freedom 
# Null hypothesis probability =   1.486664e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.264e-09   4.561e-09
25- 50  1.239e-08   8.415e-09
50-150  1.233e-08   7.220e-09
15-150  3.198e-08   1.881e-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: 1.49638     ( -0.175702   0.17681 )
Norm@50keV  : 1.89709E-03    ( -0.000190186   0.000189299 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.80 using 59 PHA bins.
# Reduced chi-squared =          1.014 for     57 degrees of freedom 
# Null hypothesis probability =   4.454281e-01
 
Photon flux (15-150 keV)    in 60.57 sec: 0.236601 ( -0.0239176  0.0239786 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.09071e-06 ( -1.19176e-07  1.20096e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.44500     (     )
Epeak [keV] : 550.180      (   )
Norm@50keV  : 2.01268E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.84 using 59 PHA bins.
# Reduced chi-squared =          1.033 for     56 degrees of freedom 
# Null hypothesis probability =   4.070295e-01
 
Photon flux (15-150 keV)    in 60.57 sec: 0.236593 ( -0.024459  0.023875 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.08912e-06 ( -1.2389e-07  1.2111e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.93251   ( -4.93251   -4.93251 )
beta        : -1.52282    ( -0.191565   0.184271 )
Epeak [keV] : 20.8428      ( -20.8428 6.15253 )
Norm@50keV   : 545.254    ( -53.2946   995429 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.60 using 59 PHA bins.
# Reduced chi-squared =          1.047 for     55 degrees of freedom 
# Null hypothesis probability =   3.792507e-01
 
Photon flux (15-150 keV)    in 60.57 sec: 0.236465 (    ) 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)  = 2.69e-07
S(50-100 keV) = 3.82e-07

T90 vs. Hardness ratio plot

T90                                   = 51.3560000061989 sec.
Hardness ratio (energy fluence ratio) = 1.42007

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.57543
Count Ratio (50-100 keV) / (15-25 keV) = 1.17885

Mask shadow pattern

IMX = -6.165415413715893E-01, IMY = 4.978340875213606E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 26.880000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 26.880000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 26.880000

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:
-299.136000 -20.444000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
325.0044  63.8838    3.3  49.4  158.3   2.5437   3.5 ------	UNKNOWN                       
340.7965  85.8343    3.0  51.6 -173.0   2.3375   3.8 ------	UNKNOWN                       
 74.6342  20.3574    3.1  38.1  -65.4   2.0123   3.8 ------	UNKNOWN

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

Time interval of the image:
-20.444000 40.124000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 37.3452  10.7202    2.2  25.4    5.5   0.4550   5.3 ------	UNKNOWN                       
350.4155  80.7617    2.7  47.7 -177.5   0.6508   4.3 ------	UNKNOWN                       
 30.0142  65.7389    2.4  29.9 -172.7   0.3946   4.9 ------	UNKNOWN                       
 59.4658  85.0970    1.9  49.6 -166.1   0.9466   6.1 ------	UNKNOWN                       
 77.7222  64.9273    0.8  38.4 -141.1   1.7207  14.3 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
149.964600 302.936100
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6289  22.0148    0.6  43.0  -53.8   6.1936  19.8    0.2	Crab                          
192.9908  47.5057    3.4  57.0 -178.9   2.2795   3.4 ------	UNKNOWN                       
 63.3757  22.3059    2.4  43.6  -26.3   0.8893   4.8 ------	UNKNOWN                       
179.6562  39.8505    3.3  59.2 -164.7   2.9796   3.5 ------	UNKNOWN                       
100.5050  42.4310    2.4  25.9  -86.7   0.7420   4.9 ------	UNKNOWN

Plot creation:
Sun May 31 16:38:25 EDT 2015