GRB070517

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: Mon Jan 20 09:48:20 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger279494
======================================================================

  Trigger: 00279494      Segment: 000

  BAT Trigger Time: 201093660.352   [s; MET]
      Trigger Stop: 201093663.424   [s; MET]
               UTC: 2007-05-17T11:20:58.391320    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 277.579460915099   Dec: -62.3326989655416  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8
     Image Trigger?:     NO
     Rate S/N Ratio:     11.2694276695846  [ if not an image trigger ]
     Image S/N Ratio:    8

  Analysis Position:   [ source = BAT ]
    RA: 277.579460915099   Dec: -62.3326989655416  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 277.561816884082   Dec: -62.3057749272213  [deg; J2000]  
        { 18h 30m 14.8s , -62d 18' 20.8" }
         +/- 1.91741640538169 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.597992521740332 [arcmin] (formal 1-sigma fit error)
    SNR: 12.0015614472974
 
  Angular difference between the analysis and refined position is 1.688641 arcmin
 
  Partial Coding Fraction: 0.671875    [ including projection effects ]

  Duration
     T90: 7.82400000095367 +/- 1.63497403007117
        Measured from: 0.939999997615814
                   to: 8.76399999856949     [s; relative to TRIGTIME]
     T50: 3.99600002169609 +/- 0.995021597520976
        Measured from: 1.89599999785423
                   to: 5.89200001955032     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.36399999260902     
                   to: 2.36399999260902     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.648000001907349     
                   to: 9.17599999904633     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.152655   0.151012   0.086244   0.009892
           0.019997   0.019085   0.016110   0.013979 [error]
 Peak      0.045281   0.035517   0.029055   0.002773
           0.006988   0.006757   0.005644   0.004940 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    8.528    0.648    9.176
T90     7.824    0.940    8.764
T50     3.996    1.896    5.892
Peak    1.000    1.364    2.364
 
 
====== 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: N/A)
 
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      -1.908    -0.255      0.242       -           -               -         2.79e-03     -4.60e-04          4.49e-04      73.080   57
CPL     -1.180    -0.911      1.332       46.357      N/A           N/A         7.40e-03        N/A               N/A         71.630   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      -1.804     -0.331     0.313       -           -               -         6.65e-03     -1.36e-03          1.32e-03      62.960   57
CPL     -1.556     -0.780     1.323       80.967      N/A           N/A         9.11e-03        N/A               N/A         62.810   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   4.46e-08  6.39e-08  6.82e-08  1.35e-07  2.19e-07  3.11e-07   erg/cm2
      90%_error_low -8.58e-09 -8.65e-09 -1.50e-08 -5.10e-08 -3.48e-08 -6.91e-08   erg/cm2
      90%_error_hi   8.86e-09  8.65e-09  1.53e-08  6.89e-08  3.57e-08  8.28e-08   erg/cm2
Peak flux       PL   3.67e-01  3.09e-01  1.77e-01  1.50e-01  9.18e-01  1.00e+00   ph/cm2/s
      90%_error_low -9.57e-02 -5.41e-02 -4.65e-02 -6.56e-02 -1.61e-01 -1.76e-01   ph/cm2/s
      90%_error_hi   1.01e-01  5.39e-02  4.67e-02  9.11e-02  1.61e-01  1.77e-01   ph/cm2/s
 
Fluence        CPL   4.21e-08  6.97e-08  6.53e-08  3.97e-08  2.01e-07  2.17e-07   erg/cm2
      90%_error_low -9.59e-09 -1.31e-08 -1.95e-08    N/A    -3.92e-08 -5.29e-08   erg/cm2
      90%_error_hi   9.61e-09  1.24e-08  1.74e-08    N/A     4.25e-08  1.21e-07   erg/cm2
Peak flux      CPL   3.56e-01  3.18e-01  1.78e-01  1.08e-01  9.09e-01  9.59e-01   ph/cm2/s
      90%_error_low -1.10e-01 -6.15e-02 -4.86e-02 -1.08e-01 -1.66e-01 -1.98e-01   ph/cm2/s
      90%_error_hi   1.10e-01  6.90e-02  4.98e-02  8.68e-02  1.65e-01  2.12e-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
  277.5618   -62.3058   0.0161    22.0118  -100.5814         0.4240162     12.002 TRIG_00279494                 
 
Foreground time interval of the image:
  0.648   9.176 (delta_t =   8.528 [sec])
Background time interval of the image:
-239.352   0.648 (delta_t = 240.000 [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    0.648 sec. to    9.176 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.90761     ( -0.25493   0.242214 )
Norm@50keV  : 2.78739E-03    ( -0.000460336   0.000449233 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.08 using 59 PHA bins.
# Reduced chi-squared =          1.282 for     57 degrees of freedom 
# Null hypothesis probability =   7.419871e-02
 
Photon flux (15-150 keV)    in 8.528 sec: 0.401343 ( -0.054515  0.054543 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.18598e-07 ( -3.4789e-08  3.5673e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.648 sec. to    9.176 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.18031     ( -0.910739   1.33211 )
Epeak [keV] : 46.3573      (   )
Norm@50keV  : 7.39784E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.63 using 59 PHA bins.
# Reduced chi-squared =          1.279 for     56 degrees of freedom 
# Null hypothesis probability =   7.784088e-02
 
Photon flux (15-150 keV)    in 8.528 sec: 0.390248 ( -0.056558  0.056663 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.01483e-07 ( -3.91568e-08  4.25441e-08 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    1.364 sec. to    2.364 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.80367     ( -0.330495   0.312665 )
Norm@50keV  : 6.65175E-03    ( -0.00136086   0.00131589 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.96 using 59 PHA bins.
# Reduced chi-squared =          1.105 for     57 degrees of freedom 
# Null hypothesis probability =   2.735556e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.917953 ( -0.16092  0.161087 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.12379e-08 ( -1.24413e-08  1.27601e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    1.364 sec. to    2.364 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.55592     ( -0.780385   1.32302 )
Epeak [keV] : 80.9671      (   )
Norm@50keV  : 9.10709E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.81 using 59 PHA bins.
# Reduced chi-squared =          1.122 for     56 degrees of freedom 
# Null hypothesis probability =   2.476956e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.909293 ( -0.165585  0.165187 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.98591e-08 ( -1.35453e-08  1.37379e-08 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = N/A sec.
Hardness ratio (energy fluence ratio) = N/A

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

S(15-50 keV)  = N/A
S(50-150 keV) = N/A

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 = -7.423612127503768E-02,

Spacecraft aspect plot

Bright

Pre-burst

 Time interval of the image: -239.352000 0.648000

# RAcent #  [deg] 170.2689 -60.6673 186.6668 -62.7726 244.9837 -15.6362 255.9556 -37.8404 256.3954 -36.4878 262.9489 -24.9325 264.6676 -44.5447 268.4258  -1.5451 270.2792 -25.1727 270.2210 -25.7541 273.9549 -13.9452 275.9517 -30.3839 285.1063 -25.0305 263.0010 -33.8058 195.9004 -51.5203 149.2169 -71.5517 324.0901 -46.9736

Pre-slew

 Time interval of the image: 0.648000 9.176000

# RAcent #  [deg] 170.2759 -60.7079 186.3725 -62.7093 244.9166 -15.5025 255.9822 -37.9348 256.3304 -36.4783 262.9469 -24.9334 264.6447 -44.3409 268.3294  -1.4107 270.0857 -25.0246 270.2505 -25.9327 273.9994 -14.0215 275.9777 -30.1822 284.9320 -24.9581 262.8868 -33.8446 287.5058  -4.3830 221.0013 -52.2546 277.5618 -62.3058

Post-slew

 Time interval of the image: 88.948600 962.701900

# RAcent #  [deg] 170.6898 -60.6550 186.6463 -62.7722 255.9866 -37.8441 256.4354 -36.4231 262.8650 -24.7929 264.7858 -44.2888 270.2842 -25.0791 270.3023 -25.7432 274.0411 -14.1339 275.8493 -30.2342 285.1135 -24.9908 262.9389 -33.8488 318.4069 -11.0732 336.7329 -27.2760

IMY = 3.973917185799377E-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] ['] 13.0 47.4 -26.8 0.3721 0.9 3.0 Cen X-3 1.0 39.4 -27.1 3.6507 11.8 0.3 GX 301-2 0.4 30.8 99.2 10.5566 27.6 0.3 Sco X-1 1.0 8.6 134.6 2.0042 11.4 1.5 4U 1700-377 3.8 10.0 133.8 0.5636 3.0 4.3 GX 349+2 4.2 22.8 139.0 0.6111 2.7 11.7 GX 1+4 4.9 9.2 -161.8 0.4696 2.4 6.5 4U 1735-44 9.2 46.7 135.2 -1.0778 -1.3 6.5 SW J1753.5-0127 1.9 25.5 153.9 1.3769 6.1 5.6 GX 5-1 3.7 25.0 154.5 0.6867 3.2 4.5 GRS 1758-258 6.1 37.0 149.5 0.7124 1.9 6.2 GX 17+2 2.3 24.4 170.9 1.0010 5.1 1.7 H1820-303 6.7 33.8 175.5 -0.4013 -1.7 7.6 HT1900.1-2455 1.3 14.8 151.3 1.6084 8.6 1.8 GX 354-0 2.3 36.4 -7.7 1.2973 5.0 ------ UNKNOWN 2.6 50.7 -44.4 5.0537 4.4 ------ UNKNOWN 2.6 48.0 -129.0 4.2905 4.4 ------ UNKNOWN background subtracted image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 3.0 47.4 -26.9 0.2296 3.8 5.2 Cen X-3 4.2 39.6 -27.1 0.1242 2.7 8.6 GX 301-2 6.9 30.9 99.1 -0.0875 -1.7 9.0 Sco X-1 6.6 8.6 134.9 -0.0506 -1.8 5.4 4U 1700-377 8.1 10.0 133.5 0.0411 1.4 6.1 GX 349+2 0.0 22.8 139.0 -0.0498 -1.6 11.8 GX 1+4 35.3 9.2 -163.1 0.0090 0.3 7.8 4U 1735-44 5.7 46.8 135.0 -0.2925 -2.0 3.4 SW J1753.5-0127 7.4 25.5 153.4 -0.0552 -1.6 11.3 GX 5-1 0.0 24.8 154.8 0.0696 2.1 11.7 GRS 1758-258 5.3 37.0 149.7 -0.1108 -2.2 1.0 GX 17+2 5.0 24.5 170.6 -0.0732 -2.3 11.4 H1820-303 14.3 33.8 175.2 -0.0302 -0.8 6.1 HT1900.1-2455 7.1 14.7 151.0 -0.0447 -1.6 5.1 GX 354-0 2.6 51.8 159.8 0.5571 4.4 ------ UNKNOWN 2.4 21.0 -6.8 0.1353 4.8 ------ UNKNOWN 1.0 22.0 -100.6 0.4240 12.0 ------ UNKNOWN image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 11.6 45.1 6.8 -0.9252 -1.0 11.2 Cen X-3 0.4 38.4 12.8 18.3016 25.6 0.3 GX 301-2 1.1 27.8 106.9 7.3086 10.2 0.0 4U 1700-377 20.4 29.0 108.6 0.4336 0.6 0.0 GX 349+2 7.6 38.8 123.8 1.9474 1.5 8.3 GX 1+4 32.6 19.5 117.0 0.1781 0.4 9.8 4U 1735-44 3.9 37.6 134.5 3.5945 3.0 0.0 GX 5-1 25.0 36.9 134.4 0.5466 0.5 0.0 GRS 1758-258 3.1 48.3 140.8 7.7577 3.7 6.2 GX 17+2 6.7 32.1 142.6 1.4566 1.7 8.9 H1820-303 10.0 37.7 156.6 -1.2769 -1.2 6.0 HT1900.1-2455 1.9 30.0 120.5 4.2263 5.9 2.6 GX 354-0 3.7 59.0 -166.2 13.2392 3.1 ------ UNKNOWN 3.7 51.9 -138.7 11.4273 3.2 ------ 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