GRB070506

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 10:02:02 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger278693
======================================================================

  Trigger: 00278693      Segment: 000

  BAT Trigger Time: 200122560   [s; MET]
      Trigger Stop: 200122624   [s; MET]
               UTC: 2007-05-06T05:35:58.063600    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 347.217597658185   Dec: 10.7283397482321  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.48
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.48

  Analysis Position:   [ source = BAT ]
    RA: 347.217597658185   Dec: 10.7283397482321  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 347.219739029459   Dec: 10.7108009152786  [deg; J2000]  
        { 23h 08m 52.7s , +10d 42' 38.9" }
         +/- 2.15721488756149 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.94215629109108 [arcmin] (formal 1-sigma fit error)
    SNR: 10.142097842926
 
  Angular difference between the analysis and refined position is 1.059875 arcmin
 
  Partial Coding Fraction: 0.96875    [ including projection effects ]

  Duration
     T90: 5.99200001358986 +/- 1.40688165181272
        Measured from: 4.17599999904633
                   to: 10.1680000126362     [s; relative to TRIGTIME]
     T50: 2.44400000572205 +/- 0.704556592365783
        Measured from: 5.3120000064373
                   to: 7.75600001215935     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 6.15599998831749     
                   to: 7.15599998831749     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 3.78400000929832     
                   to: 11.1839999854565     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.126807   0.162877   0.107280   0.004020
           0.013052   0.013905   0.012558   0.012102 [error]
 Peak      0.037965   0.053625   0.027751   0.000949
           0.005103   0.005397   0.004791   0.004463 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    7.400    3.784   11.184
T90     5.992    4.176   10.168
T50     2.444    5.312    7.756
Peak    1.000    6.156    7.156
 
 
====== 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      -1.728    -0.179      0.172       -           -               -         3.36e-03     -3.88e-04          3.82e-04      85.870   57
CPL     -0.768    -0.764      0.928       55.123     -11.291        49.188      1.17e-02     -7.28e-03          2.77e-02      81.090   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      -1.682     -0.210     0.202       -           -               -         7.51e-03     -1.07e-03          1.05e-03      61.190   57
CPL     -0.034     -1.037     1.393       49.225      -8.657        19.518      6.80e-02     -6.80e-02          3.96e-01      52.770   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   3.93e-08  6.29e-08  7.60e-08  1.80e-07  2.30e-07  3.58e-07   erg/cm2
      90%_error_low -5.55e-09 -6.13e-09 -1.18e-08 -5.05e-08 -2.75e-08 -6.36e-08   erg/cm2
      90%_error_hi   5.70e-09  6.13e-09  1.20e-08  6.24e-08  2.81e-08  7.32e-08   erg/cm2
Peak flux       PL   3.68e-01  3.33e-01  2.07e-01  1.97e-01  9.91e-01  1.11e+00   ph/cm2/s
      90%_error_low -6.43e-02 -4.12e-02 -3.75e-02 -6.07e-02 -1.22e-01 -1.42e-01   ph/cm2/s
      90%_error_hi   6.66e-02  4.12e-02  3.80e-02  7.56e-02  1.22e-01  1.43e-01   ph/cm2/s
 
Fluence        CPL   3.58e-08  7.03e-08  7.37e-08  4.20e-08  2.07e-07  2.22e-07   erg/cm2
      90%_error_low -6.37e-09 -8.44e-09 -1.45e-08 -2.78e-08 -3.00e-08 -4.13e-08   erg/cm2
      90%_error_hi   6.40e-09  8.78e-09  1.37e-08  8.40e-08  3.23e-08  8.77e-08   erg/cm2
Peak flux      CPL   3.18e-01  4.01e-01  1.98e-01  3.05e-02  9.44e-01  9.48e-01   ph/cm2/s
      90%_error_low -7.34e-02 -5.92e-02 -5.35e-02 -3.05e-02 -1.23e-01 -1.26e-01   ph/cm2/s
      90%_error_hi   7.47e-02  6.27e-02  4.82e-02  6.17e-02  1.24e-01  1.31e-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
  347.2197    10.7108   0.0189    15.3308    21.9860         0.3688070     10.142 TRIG_00278693                 
 
Foreground time interval of the image:
  3.784  11.184 (delta_t =   7.400 [sec])
Background time interval of the image:
 -2.899   3.784 (delta_t =   6.683 [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    3.784 sec. to   11.184 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.7276     ( -0.17918   0.172489 )
Norm@50keV  : 3.35904E-03    ( -0.000388084   0.000381618 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          85.87 using 59 PHA bins.
# Reduced chi-squared =          1.507 for     57 degrees of freedom 
# Null hypothesis probability =   8.015739e-03
 
Photon flux (15-150 keV)    in 7.4 sec: 0.450526 ( -0.043928  0.04393 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.29716e-07 ( -2.74832e-08  2.80892e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    3.784 sec. to   11.184 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.767538     ( -0.763956   0.927762 )
Epeak [keV] : 55.1234      ( -11.291 49.188 )
Norm@50keV  : 1.17077E-02    ( -0.00728107   0.027668 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          81.09 using 59 PHA bins.
# Reduced chi-squared =          1.448 for     56 degrees of freedom 
# Null hypothesis probability =   1.584200e-02
 
Photon flux (15-150 keV)    in 7.4 sec: 0.433398 ( -0.045528  0.045712 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.07191e-07 ( -3.00164e-08  3.23123e-08 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    6.156 sec. to    7.156 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.68178     ( -0.209863   0.202266 )
Norm@50keV  : 7.51033E-03    ( -0.00107067   0.00105455 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.19 using 59 PHA bins.
# Reduced chi-squared =          1.073 for     57 degrees of freedom 
# Null hypothesis probability =   3.281119e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.991229 ( -0.122412  0.122411 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.96578e-08 ( -1.03653e-08  1.06208e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    6.156 sec. to    7.156 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.0341636     ( -1.0375   1.3931 )
Epeak [keV] : 49.2255      ( -8.65653 19.5185 )
Norm@50keV  : 6.80462E-02    ( -0.0680545   0.396301 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.77 using 59 PHA bins.
# Reduced chi-squared =         0.9423 for     56 degrees of freedom 
# Null hypothesis probability =   5.980254e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.944131 ( -0.123123  0.124109 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.90351e-08 ( -1.0354e-08  1.16536e-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 = 2.542102395409447E-01, IMY = -1.026354651012632E-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:
-2.899410 3.784000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
308.2713  40.8802    7.8  40.3  124.1  -0.1127  -1.5    8.5	Cyg X-3                       
325.9742  38.4206   20.9  26.5  126.5  -0.0178  -0.6   11.0	Cyg X-2                       
298.6504  53.8694    2.7  49.3  140.3   0.5398   4.2 ------	UNKNOWN

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

Time interval of the image:
3.784000 11.184000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
308.1776  40.8366    8.5  40.4  124.0   0.1581   1.4    7.6	Cyg X-3                       
326.2007  38.4752   12.7  26.4  126.7   0.0457   0.9    9.3	Cyg X-2                       
347.2197  10.7108    1.1  15.3   22.0   0.3688  10.1 ------	UNKNOWN                       
351.7926 -31.8737    2.1  56.9    0.9   1.2450   5.6 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
113.300590 248.423100
250.000000 963.066800
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
308.0079  40.8292   11.5  45.8  150.7   1.2555   1.0    8.7	Cyg X-3                       
326.2732  38.4214    2.9  33.4  162.1   2.3681   4.0    7.7	Cyg X-2                       
332.3388 -27.6095    3.7  41.0   33.0   2.4862   3.1 ------	UNKNOWN                       
328.7742  24.4580    3.0  22.3  143.2   1.6593   3.9 ------	UNKNOWN                       
 28.6356  21.6621    4.8  41.1  -98.1   6.9554   2.4 ------	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 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