GRB060319

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: Wed Jan 22 18:02:19 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger202035
======================================================================

  Trigger: 00202035      Segment: 000

  BAT Trigger Time: 164422544   [s; MET]
      Trigger Stop: 164422616   [s; MET]
               UTC: 2006-03-19T00:55:42.920580    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 176.369724300677   Dec: 59.9902443826169  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.87
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    9.87

  Analysis Position:   [ source = BAT ]
    RA: 176.369724300677   Dec: 59.9902443826169  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 176.374887424348   Dec: 60.0251546863785  [deg; J2000]  
        { 11h 45m 30.0s , +60d 01' 30.6" }
         +/- 2.15924745255679 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.806499145514275 [arcmin] (formal 1-sigma fit error)
    SNR: 10.1284619320415
 
  Angular difference between the analysis and refined position is 2.100335 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 10.2880000174046 +/- 1.71882867133073
        Measured from: 2.53999999165535
                   to: 12.8280000090599     [s; relative to TRIGTIME]
     T50: 4.53200000524521 +/- 1.39278858002169
        Measured from: 4.43599998950958
                   to: 8.96799999475479     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 4.05599999427795     
                   to: 5.05599999427795     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.967999994754791     
                   to: 13.3959999978542     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.262552   0.208953   0.090808   0.043509
           0.018214   0.018691   0.016549   0.014683 [error]
 Peak      0.056162   0.048330   0.022607   0.006912
           0.005744   0.005936   0.005077   0.004257 [error]

     [ fluence units of on-axis counts / fully illuminated detector ] 

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   12.428    0.968   13.396
T90    10.288    2.540   12.828
T50     4.532    4.436    8.968
Peak    1.000    4.056    5.056
 
 
====== Spectral Analysis Summary =====================================
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^{Ph_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 both the PL model and CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedo
 
=== Time-averaged spectral analysis ===
(Best model with acceptable fit: PL)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -2.265    -0.229      0.214       -           -               -         2.25e-03     -3.44e-04          3.36e-04      41.490   57
CPL     -2.525    -0.295      0.435      193.817     -61.318      -193.817      1.64e-03     -7.29e-04          2.13e-03      40.580   56
 
 
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: PL)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -2.151     -0.275     0.252       -           -               -         6.63e-03     -1.26e-03          1.22e-03      48.990   57
CPL     -1.932     -0.106     1.294       11.809      N/A           N/A         9.04e-03        N/A               N/A         48.850   56
 
 
=== 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         PL   7.36e-08  8.52e-08  7.09e-08  9.93e-08  2.65e-07  3.29e-07   erg/cm2
      90%_error_low -9.67e-09 -8.86e-09 -1.47e-08 -3.53e-08 -3.25e-08 -5.46e-08   erg/cm2
      90%_error_hi   9.84e-09  8.72e-09  1.55e-08  4.73e-08  3.37e-08  6.40e-08   erg/cm2
Peak flux       PL   5.12e-01  3.52e-01  1.58e-01  9.91e-02  1.07e+00  1.12e+00   ph/cm2/s
      90%_error_low -8.67e-02 -4.64e-02 -3.86e-02 -3.92e-02 -1.35e-01 -1.45e-01   ph/cm2/s
      90%_error_hi   8.87e-02  4.59e-02  4.03e-02  5.30e-02  1.35e-01  1.45e-01   ph/cm2/s
 
Fluence        CPL    N/A      N/A      N/A      N/A      N/A      N/A      erg/cm2
      90%_error_low -9.67e-09 -8.86e-09 -1.47e-08 -3.53e-08 -3.25e-08 -5.46e-08   erg/cm2
      90%_error_hi   9.84e-09  8.72e-09  1.55e-08  4.73e-08  3.37e-08  6.40e-08   erg/cm2
Peak flux      CPL   5.10e-01  3.55e-01  1.58e-01  9.44e-02  1.07e+00  1.11e+00   ph/cm2/s
      90%_error_low     N/A       N/A   -3.92e-02 -3.45e-02 -1.34e-01 -1.32e-01   ph/cm2/s
      90%_error_hi      N/A       N/A    4.18e-02  1.14e-01  1.36e-01  1.63e-01   ph/cm2/s
 
======================================================================

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
  176.3749    60.0252   0.0189    10.7943   143.2141         0.7468199     10.128 TRIG_00202035                 
 
Foreground time interval of the image:
  0.968  13.396 (delta_t =  12.428 [sec])
Background time interval of the image:
 -2.299   0.968 (delta_t =   3.267 [sec])

Light Curves

Note: The mask-weighted lightcurves have units of either count/det or counts/sec/det, where a det is 0.4 x 0.4 = 0.16 sq cm.

Full-time range; 1 s binning

Bokeh Plot

Other quick-look light curves:

64 ms binning (zoomed)
16 ms binning (zoomed)
8 ms binning (zoomed)
2 ms binning (zoomed)
SN=5 or 10 s binning (full-time range)
Raw light curve

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    0.968 sec. to   13.396 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.26475     ( -0.229038   0.213572 )
Norm@50keV  : 2.24781E-03    ( -0.000344437   0.000336494 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.49 using 59 PHA bins.
# Reduced chi-squared =         0.7279 for     57 degrees of freedom 
# Null hypothesis probability =   9.389792e-01
 
Photon flux (15-150 keV)    in 12.43 sec: 0.385309 ( -0.036757  0.036759 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.654e-07 ( -3.24995e-08  3.3696e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.968 sec. to   13.396 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.5249     ( -0.289684   0.440502 )
Epeak [keV] : 193.817      ( -64.1278 -196.627 )
Norm@50keV  : 1.64254E-03    ( -0.000705302   0.0021515 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.58 using 59 PHA bins.
# Reduced chi-squared =         0.7246 for     56 degrees of freedom 
# Null hypothesis probability =   9.397890e-01
 
Photon flux (15-150 keV)    in 12.43 sec: 0.351800 ( -0.067328  0.066391 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    4.056 sec. to    5.056 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.15066     ( -0.275101   0.251542 )
Norm@50keV  : 6.63063E-03    ( -0.00125579   0.0012217 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.99 using 59 PHA bins.
# Reduced chi-squared =         0.8594 for     57 degrees of freedom 
# Null hypothesis probability =   7.659920e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.07013 ( -0.135185  0.13519 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.19555e-08 ( -1.00325e-08  1.04247e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    4.056 sec. to    5.056 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.93205     ( -0.105733   1.29383 )
Epeak [keV] : 11.8093      (   )
Norm@50keV  : 9.04332E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.85 using 59 PHA bins.
# Reduced chi-squared =         0.8724 for     56 degrees of freedom 
# Null hypothesis probability =   7.397934e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.06955 ( -0.1344  0.136 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 10.288 sec.
Hardness ratio (energy fluence ratio) = 0.832376898195

S(15-50 keV) vs. S(50-150 keV) plot

S(15-50 keV)  = 1.5870609e-07
S(50-150 keV) = 1.0669181e-07

The dash-dotted line and the dashed line traces the fluences calculated from the Band function with Epeak = 15 and 150 keV, respectively. Both lines assume a canonical values of alpha = -1 and beta = -2.5.

Mask shadow pattern

IMX = -1.526928377026331E-01, IMY = -1.141703535166016E-01

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:
-2.299400 0.968000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3455  35.2518    5.3  44.0  -17.1  -0.0647  -2.2    7.7	Her X-1                       
 54.8218  81.4557    2.7  33.9 -128.4   0.1028   4.2 ------	UNKNOWN

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

Time interval of the image:
0.968000 13.396000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3787  35.2378    6.3  44.0  -17.1   0.2270   1.9    7.4	Her X-1                       
176.3749  60.0252    1.1  10.8  143.2   0.7468  10.1 ------	UNKNOWN                       
251.5792  60.9359    2.2  24.4  -48.3   0.4390   5.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
117.100600 303.085400
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4654  35.3719   17.2  54.2   -7.8   0.2992   0.7    1.8	Her X-1                       
175.6370  63.9630    2.7   4.0  -92.3   0.6222   4.3 ------	UNKNOWN                       
  0.0505  79.1653    3.1  40.8  -88.6   2.5871   3.7 ------	UNKNOWN

Analysis Summary

Notes:

Image

Pre-slew 15.0-350.0 keV image (Event data)

Light Curves

Full-time range; 1 s binning

Other quick-look light curves:

64 ms binning (zoomed) 16 ms binning (zoomed) 8 ms binning (zoomed) 2 ms binning (zoomed) SN=5 or 10 s binning (full-time range) Raw light curve

Spectra

Notes:

Time averaged spectrum fit using the average DRM

Power-law model

Cutoff power-law model

1-s peak spectrum fit

Power-law model

Cutoff power-law model

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

S(15-50 keV) vs. S(50-150 keV) plot

Mask shadow pattern

Spacecraft aspect plot

Bright source in the pre-burst/pre-slew/post-slew images

Pre-burst image of 15-350 keV band

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

Post-slew image of 15-350 keV band

64 ms binning (zoomed)
16 ms binning (zoomed)
8 ms binning (zoomed)
2 ms binning (zoomed)
SN=5 or 10 s binning (full-time range)
Raw light curve