GRB090529A

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 19 16:25:56 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger353540
======================================================================

  Trigger: 00353540      Segment: 000

  BAT Trigger Time: 265299160   [s; MET]
      Trigger Stop: 265299224   [s; MET]
               UTC: 2009-05-29T14:12:35.217820    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 212.473951892778   Dec: 24.4370020416008  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.87
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.87

  Analysis Position:   [ source = BAT ]
    RA: 212.473951892778   Dec: 24.4370020416008  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 212.446004965651   Dec: 24.4544246599303  [deg; J2000]  
        { 14h 09m 47.0s , +24d 27' 15.9" }
         +/- 1.93783428031779 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.07386349598913 [arcmin] (formal 1-sigma fit error)
    SNR: 11.8213219468496
 
  Angular difference between the analysis and refined position is 1.850124 arcmin
 
  Partial Coding Fraction: 0.8359375    [ including projection effects ]

  Duration
     T90: 70.444000005722 +/- 10.3318451633557
        Measured from: -38.2599999904633
                   to: 32.1840000152588     [s; relative to TRIGTIME]
     T50: 32.080000013113 +/- 6.35843503648569
        Measured from: -29.2560000121593
                   to: 2.82400000095367     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -36.8560000061989     
                   to: -35.8560000061989     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -40.5760000050068     
                   to: 39.3000000119209     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.697339   0.785636   0.368785  -0.004287
           0.054406   0.056415   0.049765   0.043314 [error]
 Peak      0.018693   0.042759   0.019196   0.002440
           0.009640   0.010018   0.008202   0.007270 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   79.876  -40.576   39.300
T90    70.444  -38.260   32.184
T50    32.080  -29.256    2.824
Peak    1.000  -36.856  -35.856
 
 
====== 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      -1.986    -0.167      0.159       -           -               -         1.41e-03     -1.55e-04          1.53e-04      54.250   57
CPL     -0.870    -0.779      0.941       42.066      -8.453        11.454      6.17e-03     -3.93e-03          1.53e-02      47.860   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      -1.668     -0.557     0.536       -           -               -         5.28e-03     -1.93e-03          1.90e-03      41.980   57
CPL      0.866     -2.648     6.079       51.346     -15.478       -51.346      1.23e-01     -1.23e-01          2.43e+02      39.410   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   2.27e-07  3.11e-07  3.14e-07  5.75e-07  1.04e-06  1.43e-06   erg/cm2
      90%_error_low -2.79e-08 -2.72e-08 -4.66e-08 -1.53e-07 -1.08e-07 -2.09e-07   erg/cm2
      90%_error_hi   2.85e-08  2.72e-08  4.75e-08  1.86e-07  1.10e-07  2.34e-07   erg/cm2
Peak flux       PL   2.55e-01  2.33e-01  1.47e-01  1.41e-01  6.94e-01  7.76e-01   ph/cm2/s
      90%_error_low -1.27e-01 -8.58e-02 -6.30e-02 -8.91e-02 -2.49e-01 -2.72e-01   ph/cm2/s
      90%_error_hi   1.46e-01  8.49e-02  6.31e-02  1.44e-01  2.51e-01  2.72e-01   ph/cm2/s
 
Fluence        CPL   2.05e-07  3.51e-07  2.95e-07  1.14e-07  9.34e-07  9.65e-07   erg/cm2
      90%_error_low -3.30e-08 -3.85e-08 -5.91e-08    N/A    -1.15e-07 -1.38e-07   erg/cm2
      90%_error_hi   3.29e-08  3.96e-08  5.63e-08    N/A     1.25e-07  2.35e-07   erg/cm2
Peak flux      CPL   1.76e-01  3.04e-01  1.58e-01  1.52e-02  6.52e-01  6.53e-01   ph/cm2/s
      90%_error_low -1.33e-01 -1.18e-01 -1.58e-01 -1.52e-02 -2.44e-01 -2.45e-01   ph/cm2/s
      90%_error_hi   1.67e-01  1.29e-01  8.62e-02  1.53e-01  2.54e-01  2.61e-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
  212.4460    24.4544   0.0163    22.7501    27.4811         0.7424399     11.821 TRIG_00353540                 
 
Foreground time interval of the image:
 -7.299  39.300 (delta_t =  46.599 [sec])
Background time interval of the image:

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  -40.576 sec. to   39.300 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.98647     ( -0.16692   0.159462 )
Norm@50keV  : 1.40865E-03    ( -0.000155204   0.000152554 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.25 using 59 PHA bins.
# Reduced chi-squared =         0.9517 for     57 degrees of freedom 
# Null hypothesis probability =   5.789985e-01
 
Photon flux (15-150 keV)    in 79.88 sec: 0.210008 ( -0.018382  0.018387 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.03716e-06 ( -1.07515e-07  1.0956e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -40.576 sec. to   39.300 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.870267     ( -0.779112   0.941452 )
Epeak [keV] : 42.0659      ( -8.45287 11.4543 )
Norm@50keV  : 6.16863E-03    ( -0.00393141   0.0153035 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.86 using 59 PHA bins.
# Reduced chi-squared =         0.8546 for     56 degrees of freedom 
# Null hypothesis probability =   7.722419e-01
 
Photon flux (15-150 keV)    in 79.88 sec: 0.200905 ( -0.019279  0.019353 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.34388e-07 ( -1.14833e-07  1.2469e-07 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from  -36.856 sec. to  -35.856 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.66761     ( -0.558611   0.535227 )
Norm@50keV  : 5.28258E-03    ( -0.00192681   0.00190113 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.98 using 59 PHA bins.
# Reduced chi-squared =         0.7365 for     57 degrees of freedom 
# Null hypothesis probability =   9.318042e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.693766 ( -0.248995  0.251178 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.90637e-08 ( -1.81892e-08  1.85929e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from  -36.856 sec. to  -35.856 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.866383     ( -2.80253   5.92423 )
Epeak [keV] : 51.3458      ( -14.8559 -50.7234 )
Norm@50keV  : 0.123320    ( -0.158188   242.794 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.41 using 59 PHA bins.
# Reduced chi-squared =         0.7038 for     56 degrees of freedom 
# Null hypothesis probability =   9.546175e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.651834 ( -0.244228  0.253954 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.24737e-08 ( -1.64625e-08  1.96289e-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 = 3.720201844102486E-01, IMY = -1.935054301786858E-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:

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

Time interval of the image:
-7.299400 39.300000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
185.0289 -16.4569    2.3  33.6  148.7   0.5008   5.1 ------	UNKNOWN                       
212.4460  24.4544    1.0  22.8   27.5   0.7425  11.8 ------	UNKNOWN                       
159.1174  18.5193    2.5  29.0 -121.1   0.4004   4.6 ------	UNKNOWN                       
178.3701  49.1574    2.6  33.6  -52.3   0.3845   4.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
186.300590 963.080000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4594  35.2587   36.2  37.7   12.0  -0.1720  -0.3    5.0	Her X-1                       
280.3165  52.6396    2.7  57.5   -9.5   7.8918   4.3 ------	UNKNOWN                       
246.1746  63.6535    2.9  45.0  -30.9   2.8697   3.9 ------	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 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