GRB140302A

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: Sun Oct  5 00:36:43 EDT 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger589685
======================================================================

  Trigger: 00589685      Segment: 000

  BAT Trigger Time: 415440790.528   [s; MET]
      Trigger Stop: 415440791.552   [s; MET]
               UTC: 2014-03-02T08:12:58.819460    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 253.841655755428   Dec: -12.8649539240131  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    14.66
     Image Trigger?:     NO
     Rate S/N Ratio:     32.2024843762092  [ if not an image trigger ]
     Image S/N Ratio:    14.66

  Analysis Position:   [ source = BAT ]
    RA: 253.841655755428   Dec: -12.8649539240131  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 253.858168976711   Dec: -12.8743966577811  [deg; J2000]  
        { 16h 55m 26.0s , -12d 52' 27.8" }
         +/- 1.04063645361274 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.345653839354717 [arcmin] (formal 1-sigma fit error)
    SNR: 28.7346209492355
 
  Angular difference between the analysis and refined position is 1.119806 arcmin
 
  Partial Coding Fraction: 0.8203125    [ including projection effects ]

  Duration
     T90: 98.7239999771118 +/- 11.404047887859
        Measured from: 0.639999985694885
                   to: 99.3639999628067     [s; relative to TRIGTIME]
     T50: 40.6999999880791 +/- 6.24129728260065
        Measured from: 12.1719999909401
                   to: 52.8719999790192     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.0979999899864197     
                   to: 0.90200001001358     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0879999995231628     
                   to: 116.10799998045     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.920585   1.275366   1.335997   0.464596
           0.071070   0.064931   0.054756   0.046908 [error]
 Peak      0.028233   0.083460   0.089109   0.030332
           0.007385   0.007456   0.007003   0.005572 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  116.196   -0.088  116.108
T90    98.724    0.640   99.364
T50    40.700   12.172   52.872
Peak    1.000   -0.098    0.902
 
 
====== 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      -1.076    -0.093      0.094       -           -               -         2.25e-03     -1.10e-04          1.10e-04      52.430   57
CPL     -1.070    -0.094      0.119     9998.480    -9998.480      -9998.480      2.26e-03     -1.09e-04          6.28e-04      52.450   56
 
 
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: CPL)
 
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      -0.899     -0.158     0.164       -           -               -         1.52e-02     -1.48e-03          1.47e-03      51.990   57
CPL      0.188     -0.719     0.878      114.457     -28.591       107.893      4.62e-02     -2.36e-02          6.34e-02      44.730   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   2.25e-07  5.36e-07  1.02e-06  4.69e-06  2.75e-06  6.47e-06   erg/cm2
      90%_error_low -2.43e-08 -3.40e-08 -5.32e-08 -5.80e-07 -1.38e-07 -5.99e-07   erg/cm2
      90%_error_hi   2.54e-08  3.38e-08  5.30e-08  6.40e-07  1.38e-07  6.52e-07   erg/cm2
Peak flux       PL   3.53e-01  5.10e-01  5.46e-01  1.09e+00  1.75e+00  2.50e+00   ph/cm2/s
      90%_error_low -6.82e-02 -6.31e-02 -5.38e-02 -2.13e-01 -1.70e-01 -2.57e-01   ph/cm2/s
      90%_error_hi   7.36e-02  6.26e-02  5.36e-02  2.47e-01  1.70e-01  2.66e-01   ph/cm2/s
 
Fluence        CPL   2.24e-07  5.36e-07  1.01e-06  4.80e-06  2.77e-06  6.44e-06   erg/cm2
      90%_error_low    N/A       N/A       N/A    -1.48e-06 -1.53e-07 -1.32e-06   erg/cm2
      90%_error_hi     N/A       N/A       N/A     1.96e-07  1.22e-07  3.07e-07   erg/cm2
Peak flux      CPL   2.65e-01  5.35e-01  6.09e-01  4.33e-01  1.67e+00  1.84e+00   ph/cm2/s
      90%_error_low -8.00e-02 -7.22e-02 -6.76e-02 -1.86e-01 -1.77e-01 -2.59e-01   ph/cm2/s
      90%_error_hi   8.85e-02  7.30e-02  6.90e-02  3.36e-01  1.77e-01  3.62e-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
  253.8582   -12.8744   0.0067    18.3602    40.9842         1.7073659     28.735 TRIG_00589685                 
 
Foreground time interval of the image:
 -0.088  20.773 (delta_t =  20.861 [sec])
Background time interval of the image:
-239.528  -0.088 (delta_t = 239.440 [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   -0.088 sec. to  116.108 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.07642     ( -0.0928321   0.0942696 )
Norm@50keV  : 2.24966E-03    ( -0.000110418   0.000109964 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.43 using 59 PHA bins.
# Reduced chi-squared =         0.9198 for     57 degrees of freedom 
# Null hypothesis probability =   6.470707e-01
 
Photon flux (15-150 keV)    in 116.2 sec: 0.260382 ( -0.013447  0.013504 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.75434e-06 ( -1.38043e-07  1.3845e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.088 sec. to  116.108 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.07028     ( -0.094065   0.119342 )
Epeak [keV] : 9998.48      ( -9998.76 -9998.76 )
Norm@50keV  : 2.26165E-03    ( -0.000109055   0.000628296 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.45 using 59 PHA bins.
# Reduced chi-squared =         0.9367 for     56 degrees of freedom 
# Null hypothesis probability =   6.098543e-01
 
Photon flux (15-150 keV)    in 116.2 sec: 0.260287 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.76895e-06 ( -1.52962e-07  1.21701e-07 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from   -0.098 sec. to    0.902 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.899131     ( -0.158447   0.164133 )
Norm@50keV  : 1.52232E-02    ( -0.00147894   0.00147094 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.99 using 59 PHA bins.
# Reduced chi-squared =         0.9121 for     57 degrees of freedom 
# Null hypothesis probability =   6.630506e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.74725 ( -0.16953  0.17011 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.70923e-07 ( -1.70934e-08  1.71819e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.098 sec. to    0.902 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.188035     ( -0.719017   0.877656 )
Epeak [keV] : 114.457      ( -28.5928 107.891 )
Norm@50keV  : 4.62158E-02    ( -0.0236368   0.0634357 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.73 using 59 PHA bins.
# Reduced chi-squared =         0.7987 for     56 degrees of freedom 
# Null hypothesis probability =   8.604670e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.66908 ( -0.17677  0.1772 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.60365e-07 ( -1.94621e-08  1.91249e-08 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 98.724 sec.
Hardness ratio (energy fluence ratio) = 1.89683664979

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

S(15-50 keV)  = 7.608191e-07
S(50-150 keV) = 1.9935096e-06

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 = 2.505370543007930E-01,

Spacecraft aspect plot

Bright

Pre-burst

 Time interval of the image: -239.528000 -0.088000

# RAcent #  [deg] 244.9849 -15.6384 254.6512  35.4858 256.0073 -37.8492 256.5610 -36.5252 262.9537 -24.6679 264.7620 -44.4113 268.3822  -1.5286 270.1441 -25.0066 270.2921 -25.6421 273.9583 -14.0645 275.7379 -30.5006 284.9945 -24.8244 288.7945  10.9312 299.5944  35.1648 307.9803  40.9756 262.8646 -33.7136 229.1247  -0.8282 237.7684  36.8937 237.5862 -18.9163 265.9252   4.5639 266.1468 -28.7481 UNKNOWN UNKNOWN UNKNOWN

Pre-slew

 Time interval of the image: -0.088000 20.772580

# RAcent #  [deg] 245.0466 -15.5651 254.3142  35.3920 256.1178 -37.9227 256.4145 -36.3856 262.8758 -24.7682 264.7497 -44.4526 268.5109  -1.5068 270.3290 -24.9343 270.2200 -25.5815 273.8295 -14.1615 276.0884 -30.3399 285.1573 -25.0668 288.6440  10.9130 299.4624  35.2590 308.1058 263.0216 -33.9333 243.6314 -10.6199 253.8582 -12.8744

Post-slew

 Time interval of the image: 60.772610 708.572600

# RAcent #  [deg] 244.9720 -15.6407 254.5243  35.4176 255.9903 -37.8292 256.2947 -36.4662 262.9210 -24.7276 264.5617 -44.6014 268.5046  -1.6132 270.2700 -25.1129 270.2933 -25.7289 274.0344 -14.0474 276.0101 -30.3226 285.0326 -24.7895 288.7899  10.9377 263.0064 -33.7126 266.1296 -28.7556 274.8275 -12.6857

IMY = -2.176673394470010E-01 source in the pre-burst/pre-slew/post-slew images

image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 0.4 27.1 47.2 8.9700 28.3 0.3 Sco X-1 0.0 39.1 152.3 0.1526 0.3 12.8 Her X-1 1.5 38.1 6.0 2.7147 7.8 1.0 4U 1700-377 6.0 36.7 6.1 -0.6627 -1.9 8.6 GX 349+2 4.1 23.8 2.4 0.7002 2.8 5.5 GX 1+4 5.8 43.1 -6.1 -0.7691 -2.0 2.5 4U 1735-44 6.5 0.1 -18.2 0.3690 1.8 4.6 SW J1753.5-0127 3.9 23.6 -13.9 0.7348 3.0 8.8 GX 5-1 4.8 24.3 -14.1 0.6052 2.4 6.1 GRS 1758-258 3.2 13.8 -33.2 0.8630 3.6 3.2 GX 17+2 0.0 29.9 -22.7 0.5573 2.1 12.6 H1820-303 8.2 28.4 -43.0 0.3705 1.4 6.2 HT1900.1-2455 0.8 23.8 -131.7 3.6428 14.4 0.9 GRS 1915+105 2.5 46.8 -154.3 2.3762 4.6 2.2 Cyg X-1 7.0 55.6 -154.2 1.9381 1.6 6.0 Cyg X-3 5.9 32.7 -1.4 0.5874 2.0 9.6 GX 354-0 2.5 39.2 80.6 4.5986 4.6 ------ UNKNOWN 2.6 47.7 136.7 4.2453 4.4 ------ UNKNOWN 2.5 34.9 48.0 2.1543 4.7 ------ UNKNOWN 2.5 6.5 148.0 0.9892 4.7 ------ UNKNOWN 0.4 27.4 -5.6 7.1310 26.7 ------ UNKNOWN background subtracted image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 5.1 27.0 47.3 -0.1819 -2.3 5.9 Sco X-1 4.1 39.1 151.8 -0.2777 -2.8 7.6 Her X-1 3.6 38.2 5.8 0.2720 3.2 7.8 4U 1700-377 3.1 36.6 6.4 0.3025 3.7 2.5 GX 349+2 5.2 23.9 2.5 0.1327 2.2 7.4 GX 1+4 316.6 43.1 -6.1 0.0035 0.0 0.3 4U 1735-44 5.4 0.2 -78.1 0.1153 2.1 9.2 SW J1753.5-0127 8.9 23.6 -14.3 0.0721 1.3 9.0 GX 5-1 3.7 24.2 -13.9 -0.1780 -3.1 10.7 GRS 1758-258 0.0 13.8 -32.6 -0.1011 -1.8 12.7 GX 17+2 9.2 29.8 -23.4 0.0737 1.3 8.6 H1820-303 5.4 28.6 -43.0 -0.1317 -2.2 11.0 HT1900.1-2455 11.1 23.7 -131.9 0.0655 1.0 9.3 GRS 1915+105 6.0 46.8 -154.5 -0.2046 -1.9 7.2 Cyg X-1 40.9533 375.0 55.7 -154.1 0.0068 0.0 0.2 Cyg X-3 4.4 32.9 -1.7 0.1899 2.6 6.1 GX 354-0 2.3 26.2 58.7 0.4092 5.0 ------ UNKNOWN 0.4 18.4 41.0 1.7070 28.7 ------ UNKNOWN image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 0.2 9.0 64.5 24.7916 51.0 0.4 Sco X-1 2.9 48.3 174.1 4.3427 4.0 5.6 Her X-1 0.8 25.0 -10.6 6.8194 13.7 0.9 4U 1700-377 933.7 23.7 -11.5 0.0059 0.0 7.3 GX 349+2 2.1 14.6 -41.2 2.4941 5.6 4.9 GX 1+4 19.0 33.0 -20.7 -0.3466 -0.6 11.9 4U 1735-44 78.1 18.4 -133.3 -0.0709 -0.1 12.6 SW J1753.5-0127 1.7 19.7 -55.9 3.2680 6.9 2.2 GX 5-1 3.1 20.1 -54.5 1.8064 3.8 1.0 GRS 1758-258 2.2 19.6 -90.9 2.7495 5.2 1.8 GX 17+2 5.9 26.9 -52.7 1.0751 1.9 5.2 H1820-303 405.3 31.7 -70.0 0.0204 0.0 7.9 HT1900.1-2455 1.2 42.1 -129.6 10.2111 9.9 0.7 GRS 1915+105 3.3 22.4 -26.9 1.6494 3.5 7.4 GX 354-0 0.3 19.6 -40.5 14.4142 33.0 ------ UNKNOWN 4.0 20.4 -94.8 1.3790 2.9 ------ 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

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