batgrbproduct analysis for trigger=441015

batgrbproduct Analysis for Trigger=441015

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 May  6 16:52:15 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger441015
======================================================================

  Trigger: 00441015      Segment: 000

  BAT Trigger Time: 314995072   [s; MET]
      Trigger Stop: 314996160   [s; MET]
               UTC: 2010-12-25T18:37:45.500280    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 0.234180491347238   Dec: 44.6016240751001  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    8.06
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.06

  Flight Position:   [ source = BAT ]
    RA: 0.234180491347238   Dec: 44.6016240751001  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 0.234179   Dec: 44.6016  [deg; J2000]
        { 00h 00m 56.2s , +44d 36' 05.8" }
        +/- 3.28171838899 [arcmin] (estimated 90% radius based on SNR)
    SNR: 5.57041576246
 
 
  Angular difference between Flight and Ground position is 0.001446 arcmin
 
  Partial Coding Fraction: 0.859375    [ including projection effects ]

  Duration
     T90: N/A +/- N/A
        Measured from: N/A
                   to: N/A     [s; relative to TRIGTIME]
     T50: N/A +/- N/A
        Measured from: N/A
                   to: N/A     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

======================================================================
 
=== 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 3.98e-07 5.98e-07 6.72e-07 1.43e-06 2.10e-06 3.10e-06   erg/cm2
              Error 9.08e-08 1.00e-07 1.94e-07 8.22e-07 4.49e-07 1.04e-06   erg/cm2
Peak flux Power-law 1.09e-02 9.77e-03 6.04e-03 5.67e-03 2.91e-02 3.24e-02   ph/cm2/s
              Error 2.71e-03 1.63e-03 1.56e-03 2.88e-03 4.86e-03 5.69e-03   ph/cm2/s
 
Fluence   Cutoff-PL 3.91e-07 6.29e-07 6.50e-07 6.53e-07 1.98e-06 2.32e-06   erg/cm2
              Error 9.47e-08 1.29e-07 2.33e-07 1.15e-06 5.26e-07 1.31e-06   erg/cm2
Peak flux Cutoff-PL 1.07e-02 1.01e-02 6.02e-03 3.88e-03 2.88e-02 3.07e-02   ph/cm2/s
              Error 2.85e-03 1.99e-03 1.69e-03 4.42e-03 4.96e-03 6.62e-03   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band 1.07e-02 1.01e-02 6.01e-03 3.70e-03 2.88e-02 3.05e-02   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    1.831    0.309    -      -           2.00e-04 4.21e-05   63.180 57
CPL   1.450    1.053      57.0   -3.8      3.40e-04 1.23e-03   62.760 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.694    0.304    -      -           2.20e-04 4.32e-05   63.890 57
CPL   1.456    0.837      95.5    0.0      3.02e-04 7.24e-04   63.700 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     N/A      N/A     N/A
T90      N/A      N/A     N/A
T50      N/A      N/A     N/A
Peak     N/A      N/A     N/A

Click here for the BAT GCN circular template

Special notes of this burst

Image

Pre-slew 15.0-50.0 keV image (Event data)

#RAcent DECcent POSerr Theta  Phi  Peak_Cts  SNR Name
0.234 44.602 0.000 22.856 -40.158 2.335 5.570 TRIG_00441015
 
Image time interval: 0.000 to 963.064 [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 -179.000 sec. to  963.064 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.83102     ( -0.298458   0.318958 )
Norm@50keV  : 1.99768E-04    ( -4.27465e-05   4.14519e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.18 using 59 PHA bins.
# Reduced chi-squared =          1.108 for     57 degrees of freedom 
# Null hypothesis probability =   2.672909e-01
 
Photon flux (15-150 keV)    in 1142 sec: 2.78657E-02 ( -0.004623  0.00462371 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.09833e-06 ( -4.38576e-07  4.60279e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from -179.000 sec. to  963.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.45006     ( -1.35004   0.756084 )
Epeak [keV] : 57.0115      ( -49.4957 -57.0047 )
Norm@50keV  : 3.39593E-04    ( -0.000339806   0.00212735 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.76 using 59 PHA bins.
# Reduced chi-squared =          1.121 for     56 degrees of freedom 
# Null hypothesis probability =   2.492574e-01
 
Photon flux (15-150 keV)    in 1142 sec: 2.74621E-02 ( -0.0047102  0.0046858 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.98449e-06 ( -5.14962e-07  5.36649e-07 ) ergs/cm2

Band function

Time interval is from -179.000 sec. to  963.064 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.44260   ( -1.6339   1.33348 )
beta        : -10.0000    ( 10   1.77636e-14 )
Epeak [keV] : 56.7401      ( -42.9561 -56.7401 )
Norm@50keV   : 3.42881E-04    ( -0.000181873   0.00213728 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.76 using 59 PHA bins.
# Reduced chi-squared =          1.141 for     55 degrees of freedom 
# Null hypothesis probability =   2.205685e-01
 
Photon flux (15-150 keV)    in 1142 sec: 2.75334E-02 ( 6.97247  -0.0046052 ) 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]    : 8.42841  (-1.57686  2.26888)
R^2/D10^2   : 2.47287E-02  (-0.0147585   0.0305975)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.19 using 59 PHA bins.
# Reduced chi-squared =          1.231 for     57 degrees of freedom 
# Null hypothesis probability =   1.125837e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.761e-07   1.153e-07
25- 50  7.192e-07   2.168e-07
50-150  2.235e-07   1.122e-07
15-150  1.319e-06   4.236e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 82.6248       (-37.0232      111.495)
Norm        : 0.129985       (-0.0283316     0.0396036)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.76 using 59 PHA bins.
# Reduced chi-squared =          1.101 for     57 degrees of freedom 
# Null hypothesis probability =   2.793904e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.859e-07   8.491e-08
25- 50  6.402e-07   2.060e-07
50-150  9.233e-07   6.327e-07
15-150  1.949e-06   6.718e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.10006        (-1.35055      1.6251)
R1^2/D10^2  : 6.82832E-02        (-0.0401538      0.0656178)
kT2 [keV]   : 26.8373        (-20.1185      30.4199)
R2^2/D10^2  : 2.50686E-04    (-0.000219751   0.00105791)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.05 using 59 PHA bins.
# Reduced chi-squared =          1.055 for     55 degrees of freedom 
# Null hypothesis probability =   3.635293e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.291e-07   2.411e-07
25- 50  6.103e-07   3.264e-07
50-150  1.106e-06   6.441e-07
15-150  2.146e-06   1.119e-06

Peak spectrum fit

Power-law model

Time interval is from    0.000 sec. to  963.064 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.69441     ( -0.297652   0.310971 )
Norm@50keV  : 2.19502E-04    ( -4.38735e-05   4.26077e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.89 using 59 PHA bins.
# Reduced chi-squared =          1.121 for     57 degrees of freedom 
# Null hypothesis probability =   2.472895e-01
 
Photon flux (15-150 keV)    in 963.1 sec: 2.90955E-02 ( -0.00485824  0.00485824 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.95816e-06 ( -4.029e-07  4.19742e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.000 sec. to  963.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.45551     ( -1.1434   0.531532 )
Epeak [keV] : 95.5340      ( -96.2034 -96.2034 )
Norm@50keV  : 3.02455E-04    ( -0.000301012   0.00114625 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.70 using 59 PHA bins.
# Reduced chi-squared =          1.138 for     56 degrees of freedom 
# Null hypothesis probability =   2.238161e-01
 
Photon flux (15-150 keV)    in 963.1 sec: 2.88203E-02 ( -0.0049543  0.0049589 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.89571e-06 ( -4.68847e-07  4.66603e-07 ) ergs/cm2

Band function

Time interval is from    0.000 sec. to  963.064 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.46801   ( -1.52168   0.832913 )
beta        : -10.0000    ( 10   0 )
Epeak [keV] : 97.0623      ( -59.9339 -97.0772 )
Norm@50keV   : 2.98385E-04    ( -0.000116106   0.00114967 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.70 using 59 PHA bins.
# Reduced chi-squared =          1.158 for     55 degrees of freedom 
# Null hypothesis probability =   1.969422e-01
 
Photon flux (15-150 keV)    in 963.1 sec: 2.87877E-02 (    ) 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]    : 9.07660  (-1.83965  3.00179)
R^2/D10^2   : 1.92455E-02  (-0.0191522   0.0265295)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.65 using 59 PHA bins.
# Reduced chi-squared =          1.292 for     57 degrees of freedom 
# Null hypothesis probability =   6.804322e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.986e-07   1.104e-07
25- 50  6.431e-07   1.850e-07
50-150  2.518e-07   1.189e-07
15-150  1.193e-06   3.432e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 120.251       (-60.2382      -119.604)
Norm        : 0.124052       (-0.0236127     0.0339645)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.75 using 59 PHA bins.
# Reduced chi-squared =          1.118 for     57 degrees of freedom 
# Null hypothesis probability =   2.511583e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.112e-07   1.654e-07
25- 50  5.569e-07   3.117e-07
50-150  9.948e-07   6.756e-07
15-150  1.863e-06   1.140e-06

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.25199        (-1.33484      1.64916)
R1^2/D10^2  : 6.18795E-02        (-0.0367731      0.0935695)
kT2 [keV]   : 29.5546        (-10.3696      29.9862)
R2^2/D10^2  : 2.19826E-04    (-0.000190559   0.000394944)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.22 using 59 PHA bins.
# Reduced chi-squared =          1.059 for     55 degrees of freedom 
# Null hypothesis probability =   3.577186e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.568e-07   1.975e-07
25- 50  5.358e-07   2.861e-07
50-150  1.149e-06   6.568e-07
15-150  2.042e-06   1.042e-06

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: 1.69441     ( -0.297652   0.310971 )
Norm@50keV  : 2.19502E-04    ( -4.38735e-05   4.26077e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.89 using 59 PHA bins.
# Reduced chi-squared =          1.121 for     57 degrees of freedom 
# Null hypothesis probability =   2.472895e-01
 
Photon flux (15-150 keV)    in 963.1 sec: 2.90955E-02 ( -0.00485824  0.00485824 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.95816e-06 ( -4.029e-07  4.19742e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.45551     ( -1.1434   0.531532 )
Epeak [keV] : 95.5340      ( -96.2034 -96.2034 )
Norm@50keV  : 3.02455E-04    ( -0.000301012   0.00114625 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.70 using 59 PHA bins.
# Reduced chi-squared =          1.138 for     56 degrees of freedom 
# Null hypothesis probability =   2.238161e-01
 
Photon flux (15-150 keV)    in 963.1 sec: 2.88203E-02 ( -0.0049543  0.0049589 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.89571e-06 ( -4.68847e-07  4.66603e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.46801   ( -1.52168   0.832913 )
beta        : -10.0000    ( 10   3.55271e-15 )
Epeak [keV] : 97.0623      ( -59.9339 -97.0772 )
Norm@50keV   : 2.98385E-04    ( -0.000116106   0.00114967 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.70 using 59 PHA bins.
# Reduced chi-squared =          1.158 for     55 degrees of freedom 
# Null hypothesis probability =   1.969422e-01
 
Photon flux (15-150 keV)    in 963.1 sec: 2.87877E-02 (    ) 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)  = 5.98e-07
S(50-100 keV) = 6.72e-07

T90 vs. Hardness ratio plot

T90                                   = 1088 sec.
Hardness ratio (energy fluence ratio) = 1.12375

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.979953
Count Ratio (50-100 keV) / (15-25 keV) = 0.828998

Mask shadow pattern

IMX = 0.322152438849, IMY = 0.271833595844

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:

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

Time interval of the image:
0.000000 963.063800
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 54.9543  -7.2856    3.0  48.6  142.4  11.2160   3.8 ------	UNKNOWN                       
 52.7551  25.7496    2.8  26.2   99.8   3.5990   4.1 ------	UNKNOWN                       
 26.5456  53.1976    2.6  22.5   10.9   2.4137   4.4 ------	UNKNOWN                       
  0.2580  44.6124    2.4  22.8  -40.1   3.0309   4.8 ------	UNKNOWN                       
346.6273  46.8687    2.7  32.5  -43.6   3.2000   4.4 ------	UNKNOWN                       
298.4431  70.1671    2.5  59.6  -17.0  17.8011   4.5 ------	UNKNOWN                       
317.1990  49.9788    4.0  52.1  -42.1  10.0765   2.9 ------	UNKNOWN                       
352.0292  -7.0557    3.2  48.3 -130.1  10.0968   3.6 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:

Plot creation:
Thu Nov 12 13:18:50 EST 2015