GRB060516

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 May 24 00:17:42 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger210254
======================================================================

  Trigger: 00210254      Segment: 000

  BAT Trigger Time: 169454616   [s; MET]
      Trigger Stop: 169454680   [s; MET]
               UTC: 2006-05-16T06:43:34.803820    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 71.1776265196255   Dec: -18.1132631831351  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.43
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    9.43

  Analysis Position:   [ source = BAT ]
    RA: 71.1776265196255   Dec: -18.1132631831351  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 71.1737782623283   Dec: -18.126590211845  [deg; J2000]  
        { 04h 44m 41.7s , -18d 07' 35.7" }
         +/- 2.63967288335655 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.40995325023373 [arcmin] (formal 1-sigma fit error)
    SNR: 7.60158114105145
 
  Angular difference between the analysis and refined position is 0.829187 arcmin
 
  Partial Coding Fraction: 0.796875    [ including projection effects ]

  Duration
     T90: 128 +/- 35.7770876399966
        Measured from: -47
                   to: 81     [s; relative to TRIGTIME]
     T50: 64 +/- 22.6274169979695
        Measured from: -15
                   to: 49     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 56.5     
                   to: 57.5     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -47     
                   to: 97     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.648574   0.653196   0.286961   0.030002
           0.066103   0.069106   0.063186   0.063552 [error]
 Peak      0.008731   0.011279   0.005521   0.002638
           0.005537   0.005795   0.005312   0.005458 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  144.000  -47.000   97.000
T90   128.000  -47.000   81.000
T50    64.000  -15.000   49.000
Peak    1.000   56.500   57.500
 
 
====== 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      -2.040    -0.240      0.225       -           -               -         6.44e-04     -1.08e-04          1.06e-04      77.880   57
CPL     -0.803    -1.081      1.578       36.262     -17.501        13.632      3.73e-03     -3.73e-03          3.43e-02      73.880   56
 
 
=== 1-s peak 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      -1.706     -1.424     1.187       -           -               -         1.59e-03     -1.20e-03          1.17e-03      33.350   57
CPL     -0.104     -2.205     0.104       48.955      N/A           N/A         1.37e-02        N/A               N/A         32.670   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   1.97e-07  2.61e-07  2.54e-07  4.42e-07  8.58e-07  1.15e-06   erg/cm2
      90%_error_low -3.19e-08 -3.33e-08 -5.63e-08 -1.64e-07 -1.31e-07 -2.40e-07   erg/cm2
      90%_error_hi   3.25e-08  3.31e-08  5.88e-08  2.21e-07  1.36e-07  2.84e-07   erg/cm2
Peak flux       PL   7.94e-02  7.09e-02  4.35e-02  4.06e-02  2.11e-01  2.35e-01   ph/cm2/s
      90%_error_low -7.94e-02 -7.09e-02 -4.35e-02 -4.06e-02 -1.40e-01 -1.57e-01   ph/cm2/s
      90%_error_hi   7.87e-02  4.72e-02  4.20e-02  1.27e-01  1.40e-01  1.63e-01   ph/cm2/s
 
Fluence        CPL   1.86e-07  3.00e-07  2.15e-07  5.78e-08  7.46e-07  7.58e-07   erg/cm2
      90%_error_low -3.55e-08 -4.70e-08 -8.57e-08    N/A    -1.36e-07 -1.47e-07   erg/cm2
      90%_error_hi   3.52e-08  4.94e-08  7.72e-08    N/A     1.59e-07  2.98e-07   erg/cm2
Peak flux      CPL   6.30e-02  9.38e-02  4.01e-02  2.96e-03  2.00e-01  1.99e-01   ph/cm2/s
      90%_error_low -6.30e-02 -9.38e-02 -4.01e-02 -2.96e-03 -1.33e-01 -1.35e-01   ph/cm2/s
      90%_error_hi   8.68e-02  6.94e-02  5.42e-02  7.13e-02  1.39e-01  1.71e-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
   71.1738   -18.1266   0.0253    29.5962  -150.7527         1.3263521      7.602 TRIG_00210254                 
 
Foreground time interval of the image:
-47.000  85.901 (delta_t = 132.901 [sec])
Background time interval of the image:
-239.000 -47.000 (delta_t = 192.000 [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  -47.000 sec. to   97.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.03972     ( -0.239618   0.224807 )
Norm@50keV  : 6.44359E-04    ( -0.000108093   0.000106091 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          77.88 using 59 PHA bins.
# Reduced chi-squared =          1.366 for     57 degrees of freedom 
# Null hypothesis probability =   3.447550e-02
 
Photon flux (15-150 keV)    in 144 sec: 9.84696E-02 ( -0.0121328  0.0121334 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.57951e-07 ( -1.31272e-07  1.35812e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -47.000 sec. to   97.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.803256     ( -1.08101   1.5783 )
Epeak [keV] : 36.2619      ( -17.5005 13.6324 )
Norm@50keV  : 3.73031E-03    ( -0.0037309   0.0342969 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.88 using 59 PHA bins.
# Reduced chi-squared =          1.319 for     56 degrees of freedom 
# Null hypothesis probability =   5.491923e-02
 
Photon flux (15-150 keV)    in 144 sec: 9.46596E-02 ( -0.0123877  0.0124734 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.45852e-07 ( -1.3627e-07  1.59489e-07 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from   56.500 sec. to   57.500 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.70554     ( -1.42726   1.18382 )
Norm@50keV  : 1.58533E-03    ( -0.00120459   0.00117106 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          33.35 using 59 PHA bins.
# Reduced chi-squared =         0.5851 for     57 degrees of freedom 
# Null hypothesis probability =   9.947971e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.210956 ( -0.140341  0.140378 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.46879e-08 ( -1.0581e-08  1.2212e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   56.500 sec. to   57.500 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.103841     ( -2.24984   0.0587307 )
Epeak [keV] : 48.9554      (   )
Norm@50keV  : 1.37441E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          32.67 using 59 PHA bins.
# Reduced chi-squared =         0.5833 for     56 degrees of freedom 
# Null hypothesis probability =   9.946432e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.199746 ( -0.132879  0.13896 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.20487e-08 ( -8.58771e-09  1.28875e-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 = -4.955832647741503E-01, IMY = 2.775087466512913E-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:
-239.000000 -47.000000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6353  22.0215    0.3  26.1  -50.9   8.2302  41.4    0.4	Crab                          
 99.9223 -37.5788    2.0  36.6  150.3   1.4683   5.7 ------	UNKNOWN                       
105.2838  25.4302    2.6  28.1   -6.1   0.8020   4.4 ------	UNKNOWN

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

Time interval of the image:
-47.000000 85.900600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.5790  21.8827   31.8  26.0  -51.2  -0.0632  -0.4    8.5	Crab                          
130.8134 -15.4545    2.6  37.3   90.1   1.9158   4.5 ------	UNKNOWN                       
119.4129  -9.3544    2.5  24.8   85.7   0.8782   4.7 ------	UNKNOWN                       
 94.2353 -10.4400    2.6   9.4  165.7   0.6196   4.5 ------	UNKNOWN                       
103.2059  14.1031    2.8  16.9    0.8   0.5561   4.1 ------	UNKNOWN                       
 71.1738 -18.1266    1.5  29.6 -150.8   1.3257   7.6 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:

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