GRB070429A

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 10:10:39 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger277571
======================================================================

  Trigger: 00277571      Segment: 000

  BAT Trigger Time: 199503312   [s; MET]
      Trigger Stop: 199503392   [s; MET]
               UTC: 2007-04-29T01:35:10.078940    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 297.687314347276   Dec: -32.3880627129472  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.08
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    12.08

  Analysis Position:   [ source = BAT ]
    RA: 297.687314347276   Dec: -32.3880627129472  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 297.687254536022   Dec: -32.4180579579995  [deg; J2000]  
        { 19h 50m 44.9s , -32d 25' 05.0" }
         +/- 2.47066605794437 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.39199932710323 [arcmin] (formal 1-sigma fit error)
    SNR: 8.35517312006213
 
  Angular difference between the analysis and refined position is 1.799717 arcmin
 
  Partial Coding Fraction: 0.6875    [ including projection effects ]

  Duration
     T90: 168 +/- 26.9675731203236
        Measured from: -10
                   to: 158     [s; relative to TRIGTIME]
     T50: 74 +/- 34.2344855372474
        Measured from: 0
                   to: 74     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 4     
                   to: 5     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -14     
                   to: 180     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.765203   0.718222   0.270696   0.180817
           0.080398   0.076587   0.064790   0.055242 [error]
 Peak      0.008876   0.028524   0.008798   0.009652
           0.006370   0.006229   0.005077   0.004303 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  194.000  -14.000  180.000
T90   168.000  -10.000  158.000
T50    74.000    0.000   74.000
Peak    1.000    4.000    5.000
 
 
====== 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      -2.097    -0.270      0.252       -           -               -         5.19e-04     -9.00e-05          8.68e-05      66.960   57
CPL     -2.185    -0.555      0.409       81.790      N/A           N/A         4.44e-04        N/A               N/A         66.450   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      -1.520     -0.604     0.621       -           -               -         3.26e-03     -1.18e-03          1.17e-03      66.040   57
CPL      1.354     -3.689    -1.354       49.572     -18.813       -49.572      1.32e-01     -1.32e-01          1.64e+04      64.700   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   2.26e-07  2.89e-07  2.71e-07  4.45e-07  9.36e-07  1.23e-06   erg/cm2
      90%_error_low -4.00e-08 -3.67e-08 -6.34e-08 -1.78e-07 -1.42e-07 -2.57e-07   erg/cm2
      90%_error_hi   4.08e-08  3.65e-08  6.58e-08  2.47e-07  1.46e-07  3.09e-07   erg/cm2
Peak flux       PL   1.37e-01  1.36e-01  9.50e-02  1.05e-01  4.10e-01  4.73e-01   ph/cm2/s
      90%_error_low -7.48e-02 -5.30e-02 -4.12e-02 -6.80e-02 -1.49e-01 -1.67e-01   ph/cm2/s
      90%_error_hi   8.75e-02  5.17e-02  4.10e-02  1.21e-01  1.50e-01  1.69e-01   ph/cm2/s
 
Fluence        CPL   2.18e-07  2.42e-07  2.07e-07  2.84e-07  7.81e-07  1.23e-06   erg/cm2
      90%_error_low -4.46e-08 -1.01e-07 -1.30e-07 -2.22e-07 -3.50e-07 -7.57e-07   erg/cm2
      90%_error_hi   4.42e-08  7.49e-08  1.17e-07  4.12e-07  2.86e-07  5.41e-07   erg/cm2
Peak flux      CPL   8.83e-02  1.83e-01  8.35e-02  4.13e-03  3.58e-01  3.59e-01   ph/cm2/s
      90%_error_low -8.83e-02 -8.33e-02 -8.35e-02 -4.13e-03 -1.50e-01 -1.50e-01   ph/cm2/s
      90%_error_hi   1.11e-01  8.35e-02  5.96e-02  1.26e-01  1.68e-01  2.15e-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
  297.6873   -32.4181   0.0230    28.2113  -134.7361         1.6206704      8.355 TRIG_00277571                 
 
Foreground time interval of the image:
-14.000  88.501 (delta_t = 102.501 [sec])
Background time interval of the image:
-68.899 -14.000 (delta_t =  54.899 [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  -14.000 sec. to  180.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.09708     ( -0.269745   0.252268 )
Norm@50keV  : 5.19398E-04    ( -8.99912e-05   8.67977e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.96 using 59 PHA bins.
# Reduced chi-squared =          1.175 for     57 degrees of freedom 
# Null hypothesis probability =   1.722031e-01
 
Photon flux (15-150 keV)    in 194 sec: 8.16039E-02 ( -0.0101333  0.0101379 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.36098e-07 ( -1.4206e-07  1.46261e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -14.000 sec. to  180.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.5019     ( -0.23701   0.726361 )
Epeak [keV] : 181.153      (   )
Norm@50keV  : 3.22758E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.75 using 59 PHA bins.
# Reduced chi-squared =          1.174 for     56 degrees of freedom 
# Null hypothesis probability =   1.749276e-01
 
Photon flux (15-150 keV)    in 194 sec: 7.71778E-02 ( -0.0268368  0.0137253 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.81073e-07 ( -3.49741e-07  2.86363e-07 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    4.000 sec. to    5.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.52024     ( -0.603928   0.620341 )
Norm@50keV  : 3.26306E-03    ( -0.00118235   0.00117072 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.04 using 59 PHA bins.
# Reduced chi-squared =          1.159 for     57 degrees of freedom 
# Null hypothesis probability =   1.929375e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.409614 ( -0.149061  0.15045 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.0861e-08 ( -1.17026e-08  1.2058e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    4.000 sec. to    5.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.35432     ( -3.75883   -1.4239 )
Epeak [keV] : 49.5717      ( -18.4032 -49.1617 )
Norm@50keV  : 0.131611    ( -0.167968   16420.1 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.70 using 59 PHA bins.
# Reduced chi-squared =          1.155 for     56 degrees of freedom 
# Null hypothesis probability =   1.988940e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.358405 ( -0.149797  0.167513 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.27793e-08 ( -9.6213e-09  1.65051e-08 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 168.0 sec.
Hardness ratio (energy fluence ratio) = 0.934953354476

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

S(15-50 keV)  = 5.155065e-07
S(50-150 keV) = 4.20599e-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 = -3.775748491186838E-01,

Spacecraft aspect plot

Bright

Pre-burst

 Time interval of the image: -68.899400 -14.000000

# RAcent #  [deg] 170.0726 -60.6764 186.6466 -62.7915 244.9865 -15.6498 256.0406 -38.0378 256.4687 -36.4640 262.9638 -24.8462 264.9079 -44.4990 268.3784  -1.3931 270.2846 -25.0082 270.2610 -25.6669 274.0020 -14.0223 275.7825 -30.4037 285.1982 -24.9073 262.8254 -33.7720 200.6671 -73.8915

Pre-slew

 Time interval of the image: -14.000000 88.500600

# RAcent #  [deg] 170.5226 -60.5721 186.6077 -62.8732 244.9457 -15.6584 255.9804 -38.0247 256.3840 -36.2273 262.9382 -24.5816 264.8160 -44.6556 268.3270  -1.5038 270.1106 -25.0714 270.2370 -25.5537 273.8850 -13.9815 275.9032 -30.1942 285.1395 -24.7965 262.9510 -33.6408 152.7522 -66.2105 297.6872 -32.4180

Post-slew

 Time interval of the image: 141.700600 963.120100

# RAcent #  [deg] 256.2049 -37.7716 256.2976 -36.2549 262.9912 -24.7783 264.8481 -44.5802 268.5241  -1.2971 270.3462 -25.0315 270.3664 -25.8342 274.0250 -14.0818 275.9228 -30.2834 284.8696 -24.7797 288.8026  10.9449 262.9692 -33.7689 277.3700 -23.7370 281.5876 -15.6923 294.8318 -27.1098 352.2650 -83.0309 328.3097   5.7376 343.1421 -22.9957

IMY = 3.810693254627415E-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] ['] 5.2 54.4 6.1 -0.7120 -2.2 7.8 Cen X-3 3.4 46.4 7.4 0.4812 3.4 1.3 GX 301-2 0.7 33.3 112.8 2.5203 16.9 0.7 Sco X-1 6.1 9.2 100.7 0.1366 1.9 11.9 4U 1700-377 6.5 10.2 108.2 0.1252 1.8 2.9 GX 349+2 2.8 19.7 144.3 0.2961 4.1 6.5 GX 1+4 6.5 0.1 -107.8 0.1353 1.8 7.7 4U 1735-44 3.9 43.2 154.5 0.5190 3.0 3.6 SW J1753.5-0127 3.2 20.0 164.0 0.2570 3.6 4.3 GX 5-1 2.1 19.3 164.3 0.3888 5.5 5.1 GRS 1758-258 4.2 31.5 166.6 0.2493 2.8 0.9 GX 17+2 8.4 16.5 -175.4 0.1047 1.4 7.7 H1820-303 3.1 25.6 -163.8 0.2826 3.7 8.9 HT1900.1-2455 11.5 10.8 140.6 0.0674 1.0 9.0 GX 354-0 2.5 40.6 -8.2 0.4640 4.6 ------ UNKNOWN background subtracted image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 6.7 54.2 6.3 -1.1810 -1.7 6.8 Cen X-3 6.1 46.3 7.3 -0.5741 -1.9 6.3 GX 301-2 5.0 33.3 112.8 0.7439 2.3 2.2 Sco X-1 7.6 9.2 100.6 -0.2405 -1.5 10.8 4U 1700-377 8.8 10.4 108.7 0.2001 1.3 12.0 GX 349+2 5.0 20.0 144.3 0.3754 2.3 10.6 GX 1+4 0.0 0.2 -42.0 -0.1104 -0.7 12.7 4U 1735-44 18.8 43.1 154.4 -0.2216 -0.6 3.9 SW J1753.5-0127 12.0 19.9 163.6 0.1541 1.0 9.4 GX 5-1 4.8 19.4 164.2 -0.4084 -2.6 11.9 GRS 1758-258 5.4 31.5 166.3 -0.4159 -2.1 7.8 GX 17+2 14.1 16.8 -175.4 0.1294 0.8 10.4 H1820-303 3.6 25.7 -164.0 -0.5186 -3.2 9.3 HT1900.1-2455 7.0 10.9 141.2 0.2390 1.6 11.8 GX 354-0 2.4 57.8 -4.6 4.6604 4.8 ------ UNKNOWN 1.4 28.2 -134.7 1.6197 8.4 ------ UNKNOWN image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 0.0 34.1 77.0 1.1934 1.3 11.2 4U 1700-377 0.0 34.2 79.8 0.6089 0.7 12.1 GX 349+2 4.4 31.3 103.0 2.1919 2.6 2.2 GX 1+4 4.2 28.2 62.8 1.6981 2.7 9.0 4U 1735-44 0.0 41.5 140.6 -3.2367 -2.5 13.2 SW J1753.5-0127 2.0 25.0 108.0 3.3683 5.7 4.4 GX 5-1 3.9 24.7 106.3 1.6614 3.0 6.5 GRS 1758-258 3.8 28.3 132.7 1.7012 3.0 2.9 GX 17+2 2.8 18.7 98.6 1.8974 4.1 5.0 H1820-303 0.0 13.6 128.8 0.5349 1.4 12.4 HT1900.1-2455 0.7 44.2 175.4 13.1616 15.7 0.3 GRS 1915+105 2.7 29.0 85.6 3.0812 4.3 4.1 GX 354-0 1.4 19.9 118.6 3.5027 8.2 ------ UNKNOWN 2.7 22.2 142.9 1.8518 4.2 ------ UNKNOWN 2.7 5.8 161.9 1.9676 4.3 ------ UNKNOWN 2.6 53.8 0.9 6.0454 4.4 ------ UNKNOWN 2.8 48.0 -129.0 11.2854 4.0 ------ UNKNOWN 3.4 41.0 -83.4 9.4834 3.4 ------ 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