GRB060505

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 GROUND-DETECTED GRB DATA PROCESSING REPORT                 
    Process Script: hand-made scripts that follow steps in batgrbproduct
                    but without using TDRSS info
    Process Start Time: Tue Sep 30 00:05:10 EDT 2014
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/ground_detect_bursts/scripts
==========================================================================
 
  BAT Trigger Time: 168503759.5
               UTC: 2006-05-05T06:35:58.326   [includes UTCF correction]
       Where From?: Ground analysis (best_duration.txt)
  NOTE: BAT trigger time for ground-detected burst is the T100 start time.
 
  Analysis Position:   [ source = GCN ]
    RA: 331.770   Dec: -27.824  [deg; J2000]
 
  Refined Position:   [ source = BAT pre-slew image ]
    RA: 331.77   Dec: -27.824  [deg; J2000]
        { 22h 07m 04.8s , -27d -49' -26.4" }
        +/- 2.94878043285 [arcmin] (estimated 90% radius based on SNR)
    SNR: 6.49019031309
 
 
  Angular difference between the analysis and refined position is 0.000000 arcmin
 
  Partial Coding Fraction: 1.113281e-01    [ including projection effects ]
 
  Duration (found by FRED-model fit)
     T90: 4 +/- N/A
        Measured from: 1
                   to: 5     [s; relative to TRIGTIME]
     T50: 1 +/- N/A
        Measured from: 2
                   to: 3
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    7.000    0.000    7.000
T90     4.000    1.000    5.000
T50     1.000    2.000    3.000
Peak    1.000    2.400    3.400
 
 
====== 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      -1.233    -0.291      0.293       -           -               -         1.12e-02     -1.90e-03          1.90e-03      60.430   57
CPL     -0.627    -0.833      1.399      124.925    -124.925      -124.925      2.15e-02     -1.17e-02          6.75e-02      59.580   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      -0.969     -0.424     0.455       -           -               -         2.06e-02     -5.32e-03          5.23e-03      38.150   57
CPL     -0.322      N/A       N/A         154.311      N/A           N/A         3.91e-02        N/A               N/A         37.780   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   7.82e-08  1.69e-07  2.88e-07  1.13e-06  7.91e-07  1.66e-06   erg/cm2
      90%_error_low -2.32e-08 -3.24e-08 -5.91e-08 -4.34e-07 -1.48e-07 -4.84e-07   erg/cm2
      90%_error_hi   2.55e-08  3.18e-08  5.81e-08  5.86e-07  1.49e-07  6.12e-07   erg/cm2
Peak flux       PL   5.12e-01  7.07e-01  7.22e-01  1.35e+00  2.37e+00  3.29e+00   ph/cm2/s
      90%_error_low -2.41e-01 -2.32e-01 -1.92e-01 -6.30e-01 -6.12e-01 -8.61e-01   ph/cm2/s
      90%_error_hi   2.92e-01  2.25e-01  1.88e-01  9.11e-01  6.17e-01  9.22e-01   ph/cm2/s
 
Fluence        CPL   6.84e-08  1.78e-07  3.06e-07  5.36e-07  7.67e-07  1.09e-06   erg/cm2
      90%_error_low -2.84e-08 -3.63e-08 -6.77e-08 -3.78e-07 -1.44e-07 -4.11e-07   erg/cm2
      90%_error_hi   3.07e-08  3.79e-08  7.07e-08  1.13e-06  1.56e-07  1.07e-06   erg/cm2
Peak flux      CPL   4.26e-01  7.25e-01  7.83e-01  7.76e-01  2.32e+00  2.71e+00   ph/cm2/s
      90%_error_low -2.90e-01 -2.53e-01 -2.37e-01 -7.76e-01 -6.31e-01 -9.30e-01   ph/cm2/s
      90%_error_hi   3.54e-01  2.56e-01  2.60e-01  8.04e-01  6.33e-01  1.14e+00   ph/cm2/s
 
======================================================================

Special notes of this burst

Image

15.0-350.0 keV image (Event data)

#RAcent DECcent POSerr Theta  Phi  Peak_Cts  SNR Name
331.770 -27.824 0.000 49.716 22.125 1.004 6.490 TRIG_00208654
 
Image time interval: 0.000 to 7.000 [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.

Best duration plot

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    0.000 sec. to    7.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.23268     ( -0.291193   0.292754 )
Norm@50keV  : 1.12328E-02    ( -0.00189747   0.00189657 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.43 using 59 PHA bins.
# Reduced chi-squared =          1.060 for     57 degrees of freedom 
# Null hypothesis probability =   3.531757e-01
 
Photon flux (15-150 keV)    in 7 sec: 1.32489 ( -0.22925  0.22996 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.90657e-07 ( -1.47631e-07  1.49257e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.000 sec. to    7.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.626814     ( -0.833212   1.39939 )
Epeak [keV] : 124.925      ( -124.929 -124.929 )
Norm@50keV  : 2.14641E-02    ( -0.0117389   0.0675287 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.58 using 59 PHA bins.
# Reduced chi-squared =          1.064 for     56 degrees of freedom 
# Null hypothesis probability =   3.468939e-01
 
Photon flux (15-150 keV)    in 7 sec: 1.29223 ( -0.23724  0.23755 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.67249e-07 ( -1.44335e-07  1.56253e-07 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    2.400 sec. to    3.400 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.969326     ( -0.423535   0.455161 )
Norm@50keV  : 2.06213E-02    ( -0.00531855   0.00522984 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.15 using 59 PHA bins.
# Reduced chi-squared =         0.6694 for     57 degrees of freedom 
# Null hypothesis probability =   9.740646e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.37076 ( -0.61206  0.61658 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.25486e-07 ( -5.94012e-08  5.98982e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    2.400 sec. to    3.400 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.22372     (       )
Epeak [keV] : 65.2703      (   )
Norm@50keV  : 7.13788E-05    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          37.01 using 59 PHA bins.
# Reduced chi-squared =         0.6608 for     56 degrees of freedom 
# Null hypothesis probability =   9.764568e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.31634 ( -0.63083  0.63343 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.20836e-07 ( -6.31838e-08  6.18472e-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 = 1.09294685563, IMY = -0.444347940544

Spacecraft aspect plot

Bright source in the event data image

Event data image of 15-350 keV band

Time interval of the image:
0.000000 7.000000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.6225  35.3364    5.6  43.3  126.5  -0.4458  -2.1    8.2	Cyg X-1                       
308.0168  40.7461    0.0  38.2  137.1  -0.0236  -0.2   13.1	Cyg X-3                       
326.0748  38.2203   13.8  25.0  146.8   0.0468   0.8    7.6	Cyg X-2                       
331.7690 -27.8075    1.8  49.7   22.1   1.0202   6.5 ------	UNKNOWN                       
350.4120  11.4804    2.9   9.6  -22.2   0.1944   3.9 ------	UNKNOWN                       
 36.7464  50.2869    2.2  50.1 -134.0   1.1608   5.2 ------	UNKNOWN                       
 30.2566  24.5413    2.8  41.2  -99.1   0.7923   4.2 ------	UNKNOWN

Webpage updated on:
Wed Nov 25 17:11:47 EST 2015

Analysis Summary

Notes:

Image

15.0-350.0 keV image (Event data)

Light Curves

Best duration plot

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 event data image

Event data 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