batgrbproduct analysis for trigger=557310

batgrbproduct Analysis for Trigger=557310

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): Sun Jan 12 02:26:24 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger557310
======================================================================

  Trigger: 00557310      Segment: 000

  BAT Trigger Time: 391967364.768   [s; MET]
      Trigger Stop: 391967364.8   [s; MET]
               UTC: 2013-06-03T15:49:14.136600    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 172.20866268286   Dec: 17.0451158220811  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    17.27
     Image Trigger?:     NO
     Rate S/N Ratio:     242.441745580253  [ if not an image trigger ]
     Image S/N Ratio:    17.27

  Flight Position:   [ source = BAT ]
    RA: 172.20866268286   Dec: 17.0451158220811  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 172.221471892461   Dec: 17.0632338872491  [deg; J2000]  
        { 11h 28m 53.2s , +17d 03' 47.6" }
         +/- 0.717474690355698 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.237390618169689 [arcmin] (formal 1-sigma fit error)
    SNR: 48.8774986204871
 
  Angular difference between Flight and Ground position is 1.312105 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 0.175999999046326 +/- 0.0240000486373901
        Measured from: 0.0119999647140503
                   to: 0.187999963760376     [s; relative to TRIGTIME]
     T50: 0.059999942779541 +/- 0.00400000810623169
        Measured from: 0.0239999890327454
                   to: 0.0839999318122864     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.364000022411346     
                   to: 0.635999977588654     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.00800001621246338     
                   to: 0.259999990463257     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.132881   0.277126   0.307952   0.123182
           0.006679   0.009147   0.010285   0.008639 [error]
 Peak      0.140651   0.284678   0.309057   0.124159
           0.008400   0.010336   0.011167   0.009387 [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 3.68e-08 1.03e-07 2.32e-07 1.40e-06 6.27e-07 1.78e-06   erg/cm2
              Error 2.75e-09 4.48e-09 9.63e-09 1.37e-07 2.64e-08 1.43e-07   erg/cm2
Peak flux Power-law 1.23e+00 1.83e+00 2.02e+00 4.22e+00 6.36e+00 9.30e+00   ph/cm2/s
              Error 1.04e-01 9.14e-02 8.73e-02 4.13e-01 2.51e-01 4.50e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.62e-08 1.03e-07 2.34e-07 1.27e-06 6.25e-07 1.64e-06   erg/cm2
              Error 3.28e-09 4.86e-09 1.11e-08 2.94e-07 2.78e-08 3.25e-07   erg/cm2
Peak flux Cutoff-PL 1.23e+00 1.83e+00 2.02e+00 4.19e+00 6.36e+00 9.27e+00   ph/cm2/s
              Error 8.60e-02 6.98e-02 7.07e-02 7.44e-01 2.50e-01 7.44e-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    0.822    0.065    -      -           2.15e-01 7.80e-03   58.800 57
CPL   0.750    0.174     998.1    0.0      2.31e-01 4.35e-02   58.570 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.853    0.072    -      -           5.54e-02 2.19e-03   57.860 57
CPL   0.856    0.175    9990.4    0.0      5.51e-02 9.07e-03   58.230 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: 0.128000 sec.
T50 in the 50-300 keV band: 0.064000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    0.252    0.008    0.260
T90     0.176    0.012    0.188
T50     0.060    0.024    0.084
Peak    1.000   -0.364    0.636

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
  172.2215    17.0632   0.0040    10.6879   152.0417         0.8602893     48.877 TRIG_00557310                 
 
Foreground time interval of the image:
  0.008   0.260 (delta_t =   0.252 [sec])
Background time interval of the image:
-239.768   0.008 (delta_t = 239.776 [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 0.032000

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 0.032000

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 0.032000

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    0.008 sec. to    0.260 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.822130     ( -0.065733   0.0652556 )
Norm@50keV  : 0.214760    ( -0.00780902   0.00779875 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.80 using 59 PHA bins.
# Reduced chi-squared =          1.032 for     57 degrees of freedom 
# Null hypothesis probability =   4.092510e-01
 
Photon flux (15-150 keV)    in 0.252 sec: 24.6661 ( -0.89107  0.891176 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.26626e-07 ( -2.63476e-08  2.64388e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.008 sec. to    0.260 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.750434     ( -0.248152   0.0988657 )
Epeak [keV] : 998.073      ( -998.923 -998.923 )
Norm@50keV  : 0.231312    ( -0.021531   0.0654165 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.57 using 59 PHA bins.
# Reduced chi-squared =          1.046 for     56 degrees of freedom 
# Null hypothesis probability =   3.814127e-01
 
Photon flux (15-150 keV)    in 0.252 sec: 24.6027 ( -0.9167  0.9107 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.24519e-07 ( 0  0 ) ergs/cm2

Band function

Time interval is from    0.008 sec. to    0.260 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.958536   ( 0.958613   0.958613 )
beta        : -0.822130    ( -0.0652533   0.065738 )
Epeak [keV] : 13.5600      ( -13.559 -13.559 )
Norm@50keV   : 0.313182    ( -0.0919594   3.34098e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.80 using 59 PHA bins.
# Reduced chi-squared =          1.069 for     55 degrees of freedom 
# Null hypothesis probability =   3.380272e-01
 
Photon flux (15-150 keV)    in 0.252 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]    : 23.4936  (  )
R^2/D10^2   : 0.743832  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         182.02 using 59 PHA bins.
# Reduced chi-squared =         3.1934 for     57 degrees of freedom 
# Null hypothesis probability =   5.552079e-15
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.856e-08   1.507e-09
25- 50  1.019e-07   5.531e-09
50-150  4.196e-07   2.545e-08
15-150  5.400e-07   2.621e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 91.5464       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         361.03 using 59 PHA bins.
# Reduced chi-squared =         6.3338 for     57 degrees of freedom 
# Null hypothesis probability =   9.344666e-46
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.745e-08   2.268e-09
25- 50  1.105e-07   4.372e-09
50-150  2.424e-07   1.029e-08
15-150  4.103e-07   1.827e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 10.6257        (-1.49174      1.65295)
R1^2/D10^2  : 4.77151        (-1.46178      2.35693)
kT2 [keV]   : 52.5830        (-10.9373      23.4738)
R2^2/D10^2  : 6.45127E-02    (-0.0372108   0.0559768)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.78 using 59 PHA bins.
# Reduced chi-squared =         0.9233 for     55 degrees of freedom 
# Null hypothesis probability =   6.363497e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.286e-08   4.208e-09
25- 50  1.105e-07   1.407e-08
50-150  4.892e-07   1.318e-07
15-150  6.326e-07   1.147e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.364 sec. to    0.636 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.852985     ( -0.072621   0.0719528 )
Norm@50keV  : 5.54337E-02    ( -0.00219363   0.00218883 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.86 using 59 PHA bins.
# Reduced chi-squared =          1.015 for     57 degrees of freedom 
# Null hypothesis probability =   4.434230e-01
 
Photon flux (15-150 keV)    in 1 sec: 6.36308 ( -0.250448  0.250574 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.33805e-07 ( -2.83844e-08  2.85303e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.364 sec. to    0.636 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.855977     ( -0.273979   0.075752 )
Epeak [keV] : 9990.37      ( -9999.29 -9999.29 )
Norm@50keV  : 5.51087E-02    ( -0.00217164   0.0159613 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.23 using 59 PHA bins.
# Reduced chi-squared =          1.040 for     56 degrees of freedom 
# Null hypothesis probability =   3.930886e-01
 
Photon flux (15-150 keV)    in 1 sec: 6.36178 ( -0.25088  0.24974 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.33825e-07 ( -2.7485e-08  2.8505e-08 ) ergs/cm2

Band function

Time interval is from   -0.364 sec. to    0.636 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 5.00000   ( -5   -5 )
beta        : -0.857232    ( -0.0723507   0.0731192 )
Epeak [keV] : 30.4295      ( -30.4295 2.23903 )
Norm@50keV   : 1026.81    ( -39.9441   6.12895e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.44 using 59 PHA bins.
# Reduced chi-squared =          1.026 for     55 degrees of freedom 
# Null hypothesis probability =   4.209202e-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]    : 23.6296  (  )
R^2/D10^2   : 0.186111  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         173.54 using 59 PHA bins.
# Reduced chi-squared =         3.0446 for     57 degrees of freedom 
# Null hypothesis probability =   1.057884e-13
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.858e-08   1.345e-09
25- 50  1.023e-07   6.255e-09
50-150  4.263e-07   3.095e-08
15-150  5.472e-07   2.850e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 24.3625       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         295.55 using 59 PHA bins.
# Reduced chi-squared =         5.1851 for     57 degrees of freedom 
# Null hypothesis probability =   6.551016e-34
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.066e-08   2.700e-09
25- 50  1.167e-07   5.550e-09
50-150  2.559e-07   1.350e-08
15-150  4.333e-07   2.205e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 10.4220        (-1.50021      1.66922)
R1^2/D10^2  : 1.35226        (-0.438523      0.723514)
kT2 [keV]   : 53.5275        (-11.6696      25.9405)
R2^2/D10^2  : 1.57696E-02    (-0.00937266   0.0145276)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.22 using 59 PHA bins.
# Reduced chi-squared =         0.9313 for     55 degrees of freedom 
# Null hypothesis probability =   6.196857e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.497e-08   5.430e-09
25- 50  1.141e-07   1.488e-08
50-150  4.938e-07   1.524e-07
15-150  6.429e-07   1.604e-07

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: 0.822130     ( -0.065733   0.0652556 )
Norm@50keV  : 0.214760    ( -0.00780902   0.00779875 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.80 using 59 PHA bins.
# Reduced chi-squared =          1.032 for     57 degrees of freedom 
# Null hypothesis probability =   4.092510e-01
 
Photon flux (15-150 keV)    in 0.252 sec: 24.6661 ( -0.89107  0.891176 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.26626e-07 ( -2.63476e-08  2.64388e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.750434     ( -0.248152   0.0988657 )
Epeak [keV] : 998.073      ( -998.923 -998.923 )
Norm@50keV  : 0.231312    ( -0.021531   0.0654165 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.57 using 59 PHA bins.
# Reduced chi-squared =          1.046 for     56 degrees of freedom 
# Null hypothesis probability =   3.814127e-01
 
Photon flux (15-150 keV)    in 0.252 sec: 24.6027 ( -0.9167  0.9107 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.24519e-07 ( 0  0 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.958536   ( 0.958613   0.958613 )
beta        : -0.822130    ( -0.0652533   0.065738 )
Epeak [keV] : 13.5600      ( -13.559 -13.559 )
Norm@50keV   : 0.313182    ( -0.106192   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.80 using 59 PHA bins.
# Reduced chi-squared =          1.069 for     55 degrees of freedom 
# Null hypothesis probability =   3.380272e-01
 
Photon flux (15-150 keV)    in 0.252 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)  = 1.03e-07
S(50-100 keV) = 2.32e-07

T90 vs. Hardness ratio plot

T90                                   = 0.175999999046326 sec.
Hardness ratio (energy fluence ratio) = 2.25243

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 2.08552
Count Ratio (50-100 keV) / (15-25 keV) = 2.3175

Mask shadow pattern

IMX = -1.667061113585569E-01, IMY = -8.848377010167226E-02

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.032000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.032000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.032000

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:
-239.768000 0.008000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
237.3272  51.9437    2.3  52.8   11.3   3.9599   4.9 ------	UNKNOWN                       
188.1594  31.5097    2.8  13.6   37.3   0.8190   4.1 ------	UNKNOWN                       
125.0828   7.3626    3.2  49.8 -137.6   2.9470   3.6 ------	UNKNOWN                       
136.1929  74.9418    4.5  50.7  -44.5   2.9778   2.6 ------	UNKNOWN                       
123.2475   8.5931    2.8  50.7 -135.1   4.3339   4.2 ------	UNKNOWN

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

Time interval of the image:
0.008000 0.260000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
172.2215  17.0632    0.2  10.7  152.0   0.8603  48.9 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
42.532590 785.632600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
185.2934  23.0536    3.0  13.7   37.7   1.8985   3.8 ------	UNKNOWN                       
203.4626  47.3707    3.0  39.7    9.2   3.0794   3.9 ------	UNKNOWN                       
181.0740  20.7589    3.4   9.2   40.6   1.6812   3.4 ------	UNKNOWN                       
180.7796  38.6141    2.9  22.8   -6.7   2.0440   3.9 ------	UNKNOWN                       
162.1907   9.9935    2.9  12.0 -149.0   1.9194   3.9 ------	UNKNOWN                       
143.6604  18.0066    3.3  27.2 -107.9   2.1836   3.5 ------	UNKNOWN                       
130.3306 -25.2558    4.5  58.8 -159.3  10.3648   2.5 ------	UNKNOWN

Plot creation:
Sat May 30 16:40:55 EDT 2015