GRB130626A

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 Jan 12 01:08:36 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger559075
======================================================================

  Trigger: 00559075      Segment: 000

  BAT Trigger Time: 393936674.496   [s; MET]
      Trigger Stop: 393936674.56   [s; MET]
               UTC: 2013-06-26T10:51:03.776680    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 273.130048097431   Dec: -9.5308586993301  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.33
     Image Trigger?:     NO
     Rate S/N Ratio:     26  [ if not an image trigger ]
     Image S/N Ratio:    9.33

  Analysis Position:   [ source = BAT ]
    RA: 273.130048097431   Dec: -9.5308586993301  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 273.123307314123   Dec: -9.52486458167223  [deg; J2000]  
        { 18h 12m 29.6s , -09d 31' 29.5" }
         +/- 1.7698993951083 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.605065131020687 [arcmin] (formal 1-sigma fit error)
    SNR: 13.4556946045909
 
  Angular difference between the analysis and refined position is 0.537067 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 0.159999966621399 +/- 0.0288443860018143
        Measured from: 0
                   to: 0.159999966621399     [s; relative to TRIGTIME]
     T50: 0.0879999995231628 +/- 0.0291204412600908
        Measured from: 0.0199999809265137
                   to: 0.107999980449677     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.413999974727631     
                   to: 0.586000025272369     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0119999647140503     
                   to: 0.180000007152557     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.022713   0.028869   0.035994   0.004563
           0.003958   0.003970   0.003671   0.002666 [error]
 Peak      0.028768   0.035706   0.043656   0.009066
           0.007640   0.007119   0.005978   0.004847 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    0.192   -0.012    0.180
T90     0.160    0.000    0.160
T50     0.088    0.020    0.108
Peak    1.000   -0.414    0.586
 
 
====== 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      -1.221    -0.209      0.210       -           -               -         3.11e-02     -3.86e-03          3.86e-03      64.320   57
CPL     -0.166    -0.952      1.226       95.800     -25.045       296.843      9.51e-02     -5.96e-02          2.24e-01      60.690   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      -1.196     -0.311     0.321       -           -               -         7.44e-03     -1.30e-03          1.30e-03      57.250   57
CPL     -0.736     -1.298     1.572      160.592    -160.592      -160.592      1.18e-02     -5.48e-03          3.60e-02      56.820   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   5.87e-09  1.28e-08  2.20e-08  8.70e-08  6.02e-08  1.28e-07   erg/cm2
      90%_error_low -1.28e-09 -1.79e-09 -3.29e-09 -2.53e-08 -8.27e-09 -2.79e-08   erg/cm2
      90%_error_hi   1.37e-09  1.76e-09  3.25e-09  3.14e-08  8.35e-09  3.31e-08   erg/cm2
Peak flux       PL   2.29e-01  2.76e-01  2.41e-01  3.61e-01  8.73e-01  1.11e+00   ph/cm2/s
      90%_error_low -7.66e-02 -6.03e-02 -4.75e-02 -1.33e-01 -1.60e-01 -1.98e-01   ph/cm2/s
      90%_error_hi   8.70e-02  5.89e-02  4.66e-02  1.76e-01  1.61e-01  2.02e-01   ph/cm2/s
 
Fluence        CPL   4.61e-09  1.38e-08  2.42e-08  2.78e-08  5.71e-08  7.03e-08   erg/cm2
      90%_error_low -1.67e-09 -2.09e-09 -3.96e-09 -1.59e-08 -8.74e-09 -1.79e-08   erg/cm2
      90%_error_hi   1.76e-09  2.15e-09  4.12e-09  4.85e-08  8.86e-09  4.76e-08   erg/cm2
Peak flux      CPL   2.01e-01  2.81e-01  2.54e-01  2.40e-01  8.51e-01  9.76e-01   ph/cm2/s
      90%_error_low -1.02e-01 -6.46e-02 -5.64e-02 -1.48e-01 -1.72e-01 -2.51e-01   ph/cm2/s
      90%_error_hi   1.07e-01  6.43e-02  6.06e-02  2.77e-01  1.71e-01  3.07e-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
  273.1233    -9.5249   0.0144    14.5632  -147.7568         0.0962465     13.456 TRIG_00559075                 
 
Foreground time interval of the image:
 -0.012   0.180 (delta_t =   0.192 [sec])
Background time interval of the image:
-239.496  -0.012 (delta_t = 239.484 [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   -0.012 sec. to    0.180 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.22102     ( -0.208808   0.210179 )
Norm@50keV  : 3.10696E-02    ( -0.00385959   0.00385865 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.32 using 59 PHA bins.
# Reduced chi-squared =          1.128 for     57 degrees of freedom 
# Null hypothesis probability =   2.358127e-01
 
Photon flux (15-150 keV)    in 0.192 sec: 3.65811 ( -0.4646  0.46558 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.01743e-08 ( -8.27268e-09  8.34785e-09 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.012 sec. to    0.180 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.165586     ( -0.951534   1.22637 )
Epeak [keV] : 95.7997      ( -25.0446 296.844 )
Norm@50keV  : 9.50680E-02    ( -0.059596   0.223602 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.69 using 59 PHA bins.
# Reduced chi-squared =          1.084 for     56 degrees of freedom 
# Null hypothesis probability =   3.105638e-01
 
Photon flux (15-150 keV)    in 0.192 sec: 3.49728 ( -0.49313  0.4901 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.70572e-08 ( -8.7423e-09  8.86339e-09 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from   -0.414 sec. to    0.586 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.19586     ( -0.310849   0.320881 )
Norm@50keV  : 7.44362E-03    ( -0.00130088   0.0012983 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.25 using 59 PHA bins.
# Reduced chi-squared =          1.004 for     57 degrees of freedom 
# Null hypothesis probability =   4.659014e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.873230 ( -0.159907  0.16112 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.56154e-08 ( -1.41161e-08  1.42391e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.414 sec. to    0.586 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.735818     ( -1.29776   1.57195 )
Epeak [keV] : 160.592      ( -160.658 -160.658 )
Norm@50keV  : 1.17905E-02    ( -0.00547434   0.0360219 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.82 using 59 PHA bins.
# Reduced chi-squared =          1.015 for     56 degrees of freedom 
# Null hypothesis probability =   4.442069e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.850995 ( -0.172143  0.170835 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.40867e-08 ( -1.47354e-08  1.47761e-08 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 0.16 sec.
Hardness ratio (energy fluence ratio) = 1.71597020955

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

S(15-50 keV)  = 1.8666081e-08
S(50-150 keV) = 4.150878e-08

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 = -2.197313037189493E-01,

Spacecraft aspect plot

Bright

Pre-burst

 Time interval of the image: -239.496000 -0.012000

# RAcent #  [deg] 244.9777 -15.6421 255.9962 -37.8669 256.4217 -36.5619 263.0593 -24.8203 264.5682 -44.4433 268.2217  -1.4884 270.3154 -25.2267 270.2880 -25.8877 274.0422 -14.0510 275.9112 -30.2455 285.1678 -24.7655 288.7708  10.9855 263.1258 -33.9918

Pre-slew

 Time interval of the image: -0.012000 0.180000

# RAcent #  [deg] 244.8807 -15.7418 255.9717 -37.9661 256.3631 -36.5485 262.9056 -24.7624 264.5609 -44.4010 268.3798  -1.5426 270.4532 -24.9441 270.4669 -25.7517 273.9895 -13.8893 275.8459 -30.3629 284.9246 -24.7745 288.9444  10.8005 263.1498 -33.9773 305.0306 -10.2034 273.1233  -9.5249 262.6846  14.1606

Post-slew

 Time interval of the image: 47.004600 125.004600

# RAcent #  [deg] 244.9947 -15.6486 255.9869 -37.8286 256.3847 -36.4652 262.8697 -24.6099 264.9529 -44.5928 268.3659  -1.3849 270.4490 -25.0961 270.4414 -25.6090 273.8710 -13.9885 276.1157 -30.4905 285.2087 -24.9727 288.7414  10.8593 262.8709 -33.7007 285.6184 -15.7470 241.4300 -16.0389 220.9873 -10.8284 223.5146  -7.3207 321.0381  20.6972

IMY = 1.386037145445926E-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] ['] 0.3 39.3 178.7 18.4231 42.2 0.2 Sco X-1 0.9 33.5 138.3 6.3692 12.5 1.4 4U 1700-377 5.6 32.6 140.1 1.0239 2.1 8.4 GX 349+2 10.0 22.7 158.9 0.3374 1.1 5.3 GX 1+4 4.0 32.8 121.5 -1.5557 -2.9 7.5 4U 1735-44 7.5 23.4 -137.4 0.4533 1.5 9.0 SW J1753.5-0127 10.5 16.7 150.8 0.3217 1.1 9.0 GX 5-1 4.3 17.0 148.8 0.7889 2.7 8.7 GRS 1758-258 2.1 11.9 -164.2 1.6120 5.4 2.3 GX 17+2 36.0 16.1 125.7 -0.1031 -0.3 7.3 H1820-303 7.1 7.7 98.0 0.4669 1.6 11.7 HT1900.1-2455 1.3 28.2 -81.4 3.5912 9.0 2.9 GRS 1915+105 4.1 26.5 138.8 -1.0451 -2.8 11.6 GX 354-0 background subtracted image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 9.2 39.3 178.5 -0.0133 -1.3 8.3 Sco X-1 15.1 33.6 138.2 -0.0099 -0.8 7.3 4U 1700-377 40.5 32.6 140.2 -0.0035 -0.3 8.3 GX 349+2 5.6 22.8 159.1 0.0167 2.1 5.7 GX 1+4 3.8 32.7 121.5 0.0472 3.0 8.3 4U 1735-44 5.0 23.2 -137.2 0.0179 2.3 5.4 SW J1753.5-0127 0.0 16.5 151.5 -0.0176 -2.2 12.3 GX 5-1 4.8 16.8 149.0 0.0189 2.4 8.9 GRS 1758-258 7.0 11.9 -163.6 0.0112 1.6 8.9 GX 17+2 11.9 16.2 125.6 0.0074 1.0 4.1 H1820-303 12.2 7.8 99.6 0.0070 0.9 10.7 HT1900.1-2455 0.0 28.0 -81.0 -0.0130 -1.3 12.2 GRS 1915+105 3.5 26.5 138.8 -0.0305 -3.3 11.7 GX 354-0 2.5 19.8 -15.1 0.0342 4.7 ------ UNKNOWN 0.9 14.6 -147.8 0.0962 13.5 ------ UNKNOWN 1.9 38.7 -125.0 0.0853 6.0 ------ UNKNOWN image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 0.5 28.1 173.6 6.8005 22.7 1.0 Sco X-1 2.4 32.2 125.0 2.0692 4.7 0.9 4U 1700-377 4.2 30.9 125.9 1.0921 2.7 3.5 GX 349+2 3.5 18.0 130.8 0.8822 3.3 11.1 GX 1+4 0.0 35.8 109.1 -1.2207 -2.1 12.4 4U 1735-44 7.7 9.4 -111.5 0.4001 1.5 4.1 SW J1753.5-0127 3.6 15.8 108.1 0.8692 3.4 9.0 GX 5-1 7.4 16.3 107.8 0.4840 1.9 11.0 GRS 1758-258 7.1 4.5 90.1 0.4267 1.6 8.4 GX 17+2 0.0 21.1 92.0 0.0751 0.2 12.3 H1820-303 86.3 19.2 64.0 0.0402 0.1 9.9 HT1900.1-2455 3.0 25.6 -43.3 1.0359 3.8 6.2 GRS 1915+105 9.3 25.9 118.9 -0.4178 -1.2 10.0 GX 354-0 2.6 13.7 37.4 1.1409 4.4 ------ UNKNOWN 2.7 31.6 173.9 1.2530 4.3 ------ UNKNOWN 2.4 51.3 -177.2 3.5841 4.9 ------ UNKNOWN 2.4 49.1 -172.4 2.7442 4.9 ------ UNKNOWN 2.7 55.9 -24.0 4.3673 4.2 ------ 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