batgrbproduct analysis for trigger=275119

batgrbproduct Analysis for Trigger=275119

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): Tue Jun 23 22:14:14 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger275119
======================================================================

  Trigger: 00275119      Segment: 000

  BAT Trigger Time: 198034025.28   [s; MET]
      Trigger Stop: 198034025.792   [s; MET]
               UTC: 2007-04-12T01:27:03.395620    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 181.505172705328   Dec: 40.1008001435465  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.32
     Image Trigger?:     NO
     Rate S/N Ratio:     8.94427190999916  [ if not an image trigger ]
     Image S/N Ratio:    7.32

  Flight Position:   [ source = BAT ]
    RA: 181.505172705328   Dec: 40.1008001435465  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 181.523400544306   Dec: 40.1474402138937  [deg; J2000]  
        { 12h 06m 05.6s , +40d 08' 50.8" }
         +/- 1.52925958471965 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.632155016314402 [arcmin] (formal 1-sigma fit error)
    SNR: 16.5795902308619
 
  Angular difference between Flight and Ground position is 2.920689 arcmin
 
  Partial Coding Fraction: 0.984375    [ including projection effects ]

  Duration
     T90: 33.8760000169277 +/- 5.07696445672102
        Measured from: -3.21999999880791
                   to: 30.6560000181198     [s; relative to TRIGTIME]
     T50: 7.91200003027916 +/- 15.3215607602688
        Measured from: 0.359999984502792
                   to: 8.27200001478195     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 5.31999999284744     
                   to: 6.31999999284744     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -4.55200001597404     
                   to: 31.1879999935627     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.215926   0.309423   0.223459   0.007192
           0.027741   0.029851   0.028857   0.031731 [error]
 Peak      0.017232   0.035541   0.029571   0.007499
           0.004822   0.005309   0.005111   0.005537 [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 5.85e-08 1.14e-07 1.72e-07 5.61e-07 4.82e-07 9.04e-07   erg/cm2
              Error 1.03e-08 1.29e-08 2.72e-08 1.86e-07 6.62e-08 2.10e-07   erg/cm2
Peak flux Power-law 2.01e-01 2.21e-01 1.74e-01 2.24e-01 6.79e-01 8.20e-01   ph/cm2/s
              Error 5.85e-02 4.02e-02 4.15e-02 1.11e-01 1.18e-01 1.60e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.16e-08 1.28e-07 1.70e-07 1.18e-07 4.24e-07 4.68e-07   erg/cm2
              Error 1.21e-08 1.78e-08 3.21e-08 1.96e-07 7.58e-08 1.93e-07   erg/cm2
Peak flux Cutoff-PL 1.92e-01 2.30e-01 1.76e-01 1.40e-01 6.68e-01 7.38e-01   ph/cm2/s
              Error 6.60e-02 4.90e-02 4.45e-02 1.70e-01 1.23e-01 2.02e-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    1.407    0.193    -      -           1.40e-03 1.66e-04   67.290 57
CPL   0.340    0.974      69.9   60.0      5.34e-03 1.00e-02   62.760 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.350    0.314    -      -           5.64e-03 1.04e-03   58.820 57
CPL   1.007    1.444     135.4    0.0      8.61e-03 2.07e-02   58.550 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: 16.768000 sec.
T50 in the 50-300 keV band: 7.488000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   35.740   -4.552   31.188
T90    33.876   -3.220   30.656
T50     7.912    0.360    8.272
Peak    1.000    5.320    6.320

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
  181.5234    40.1474   0.0116    10.5903   -65.8286         0.6712004     16.580 TRIG_00275119                 
 
Foreground time interval of the image:
 -4.552  10.821 (delta_t =  15.373 [sec])
Background time interval of the image:
-239.280  -4.552 (delta_t = 234.728 [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 0.512000

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 0.512000

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 0.512000

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   -4.552 sec. to   31.188 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.40725     ( -0.19183   0.194169 )
Norm@50keV  : 1.39783E-03    ( -0.000167289   0.000165608 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.29 using 59 PHA bins.
# Reduced chi-squared =          1.180 for     57 degrees of freedom 
# Null hypothesis probability =   1.653768e-01
 
Photon flux (15-150 keV)    in 35.74 sec: 0.170511 ( -0.0189745  0.0189749 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.82022e-07 ( -6.53853e-08  6.70686e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -4.552 sec. to   31.188 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.339956     ( -1.07681   0.870656 )
Epeak [keV] : 69.9283      ( -16.6539 103.328 )
Norm@50keV  : 5.33913E-03    ( -0.00533913   0.0147595 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.76 using 59 PHA bins.
# Reduced chi-squared =          1.121 for     56 degrees of freedom 
# Null hypothesis probability =   2.492002e-01
 
Photon flux (15-150 keV)    in 35.74 sec: 0.162098 ( -0.01994  0.020072 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.24194e-07 ( -7.21298e-08  7.94143e-08 ) ergs/cm2

Band function

Time interval is from   -4.552 sec. to   31.188 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.257390   ( -0.842966   0.24927 )
beta        : -2.35329    ( 2.36837   0.969728 )
Epeak [keV] : 66.7153      ( -42.0233 88.9468 )
Norm@50keV   : 6.01651E-03    ( -0.00607856   26.7493 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.55 using 59 PHA bins.
# Reduced chi-squared =          1.137 for     55 degrees of freedom 
# Null hypothesis probability =   2.258382e-01
 
Photon flux (15-150 keV)    in 35.74 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]    : 13.9907  (-1.74413  2.04335)
R^2/D10^2   : 2.53634E-02  (-0.00951787   0.0148513)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.38 using 59 PHA bins.
# Reduced chi-squared =          1.217 for     57 degrees of freedom 
# Null hypothesis probability =   1.259297e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.748e-08   8.004e-09
25- 50  1.393e-07   2.173e-08
50-150  1.795e-07   4.577e-08
15-150  3.563e-07   5.954e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 0.695170       (-0.0771523     0.0771519)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.15 using 59 PHA bins.
# Reduced chi-squared =          1.160 for     57 degrees of freedom 
# Null hypothesis probability =   1.903959e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.187e-08   3.436e-08
25- 50  1.190e-07   6.517e-08
50-150  2.610e-07   1.422e-07
15-150  4.419e-07   2.409e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.87455        (-2.4077      4.97498)
R1^2/D10^2  : 0.212773        (-0.167173      1.23384)
kT2 [keV]   : 18.4264        (-3.90379      22.1429)
R2^2/D10^2  : 8.20234E-03    (-0.00780217   0.00815304)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.09 using 59 PHA bins.
# Reduced chi-squared =          1.129 for     55 degrees of freedom 
# Null hypothesis probability =   2.383387e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.358e-08   2.866e-08
25- 50  1.252e-07   6.430e-08
50-150  2.334e-07   1.328e-07
15-150  4.122e-07   2.162e-07

Peak spectrum fit

Power-law model

Time interval is from    5.320 sec. to    6.320 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.35043     ( -0.312093   0.316653 )
Norm@50keV  : 5.63928E-03    ( -0.00105324   0.0010351 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.82 using 59 PHA bins.
# Reduced chi-squared =          1.032 for     57 degrees of freedom 
# Null hypothesis probability =   4.087139e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.679431 ( -0.118447  0.118449 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.50724e-08 ( -1.17471e-08  1.2197e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    5.320 sec. to    6.320 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00667     ( -1.37837   1.51052 )
Epeak [keV] : 135.411      ( -135.411 -135.411 )
Norm@50keV  : 8.60856E-03    ( -0.00395471   0.0373698 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.55 using 59 PHA bins.
# Reduced chi-squared =          1.045 for     56 degrees of freedom 
# Null hypothesis probability =   3.821214e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.668434 ( -0.123585  0.123259 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.28841e-08 ( -1.35387e-08  1.37633e-08 ) ergs/cm2

Band function

Time interval is from    5.320 sec. to    6.320 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.407632   ( 0.622645   0.622645 )
beta        : -1.54025    ( 1.46965   0.402572 )
Epeak [keV] : 43.4486      ( -43.0968 179.262 )
Norm@50keV   : 8.15934E-02    ( -0.0912527   346.964 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.16 using 59 PHA bins.
# Reduced chi-squared =          1.057 for     55 degrees of freedom 
# Null hypothesis probability =   3.598772e-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]    : 14.7040  (-3.4566  4.67626)
R^2/D10^2   : 8.32541E-02  (-0.0498182   0.123613)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.51 using 59 PHA bins.
# Reduced chi-squared =          1.149 for     57 degrees of freedom 
# Null hypothesis probability =   2.054466e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.780e-09   1.529e-09
25- 50  1.474e-08   4.404e-09
50-150  2.150e-08   9.362e-09
15-150  4.002e-08   1.220e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-89.4809      -199.363)
Norm        : 2.75070       (-0.481231     0.481235)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.44 using 59 PHA bins.
# Reduced chi-squared =          1.043 for     57 degrees of freedom 
# Null hypothesis probability =   3.866732e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.850e-09   3.977e-09
25- 50  1.318e-08   7.575e-09
50-150  2.890e-08   1.648e-08
15-150  4.892e-08   2.830e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.22880        (-2.95171      3.90862)
R1^2/D10^2  : 0.600073        (-0.444354      2.06779)
kT2 [keV]   : 28.3631        (-24.0517      85.8503)
R2^2/D10^2  : 7.29302E-03    (-0.0070682   0.032469)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.50 using 59 PHA bins.
# Reduced chi-squared =          1.045 for     55 degrees of freedom 
# Null hypothesis probability =   3.826880e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.152e-09   3.526e-09
25- 50  1.329e-08   7.025e-09
50-150  3.456e-08   2.064e-08
15-150  5.400e-08   2.763e-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: 1.53922     ( -0.161665   0.164709 )
Norm@50keV  : 2.65538E-03    ( -0.000268279   0.000264838 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.58 using 59 PHA bins.
# Reduced chi-squared =          1.080 for     57 degrees of freedom 
# Null hypothesis probability =   3.154343e-01
 
Photon flux (15-150 keV)    in 15.37 sec: 0.335115 ( -0.0301119  0.0301125 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.84822e-07 ( -4.29658e-08  4.39616e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.809676     ( -0.903794   0.733542 )
Epeak [keV] : 70.5677      ( -19.1839 3219.29 )
Norm@50keV  : 6.82237E-03    ( -0.00412536   0.0151159 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.74 using 59 PHA bins.
# Reduced chi-squared =          1.049 for     56 degrees of freedom 
# Null hypothesis probability =   3.752868e-01
 
Photon flux (15-150 keV)    in 15.37 sec: 0.322757 ( -0.032516  0.032536 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.48409e-07 ( -5.28082e-08  5.6557e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.384373   ( -0.925618   0.369977 )
beta        : -1.97158    ( 1.97263   0.446588 )
Epeak [keV] : 54.2802      ( -29.485 68.3729 )
Norm@50keV   : 1.28787E-02    ( -0.0138113   70.6748 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.50 using 59 PHA bins.
# Reduced chi-squared =          1.046 for     55 degrees of freedom 
# Null hypothesis probability =   3.826439e-01
 
Photon flux (15-150 keV)    in 15.37 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.57366e-07 ( 0  0 ) ergs/cm2

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

S(25-50 keV)  = 1.14e-07
S(50-100 keV) = 1.72e-07

T90 vs. Hardness ratio plot

T90                                   = 33.8760000169277 sec.
Hardness ratio (energy fluence ratio) = 1.50877

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.433
Count Ratio (50-100 keV) / (15-25 keV) = 1.03489

Mask shadow pattern

IMX = 7.655770389769587E-02, IMY = 1.705764847002052E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

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:
-239.280000 -4.552000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
160.8195   2.6073    2.5  35.4  171.1   1.1118   4.6 ------	UNKNOWN                       
138.3684  -6.0655    2.5  57.0 -174.2   4.6316   4.6 ------	UNKNOWN                       
237.7695  72.9272    3.5  51.1  -35.4   2.2458   3.3 ------	UNKNOWN                       
136.8836  51.0649    3.3  41.1  -98.0   3.7912   3.5 ------	UNKNOWN

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

Time interval of the image:
-4.552000 10.820590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
181.5234  40.1475    0.7  10.6  -65.8   0.6713  16.6 ------	UNKNOWN                       
143.2708  27.6079    2.2  36.1 -136.1   0.3074   5.2 ------	UNKNOWN                       
139.3017  53.9833    2.1  40.4  -93.1   0.8930   5.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
49.620590 75.911100
76.720000 123.420600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3765  35.4599    4.6  56.1    3.4   1.2762   2.5    8.1	Her X-1                       
119.6496  14.4203    2.6  59.4 -163.1   2.7128   4.4 ------	UNKNOWN                       
125.5980  31.4649    2.5  45.4 -148.8   0.8041   4.5 ------	UNKNOWN

Plot creation:
Tue Jun 23 22:31:31 EDT 2015