GRB100625A

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: Thu Sep 11 11:14:43 EDT 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger425647
======================================================================

  Trigger: 00425647      Segment: 000

  BAT Trigger Time: 299183554.304   [s; MET]
      Trigger Stop: 299183554.56   [s; MET]
               UTC: 2010-06-25T18:32:28.377940    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 15.7708589285121   Dec: -39.0829393330905  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    15.27
     Image Trigger?:     NO
     Rate S/N Ratio:     93.2469838654313  [ if not an image trigger ]
     Image S/N Ratio:    15.27

  Analysis Position:   [ source = BAT ]
    RA: 15.7708589285121   Dec: -39.0829393330905  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 15.7953236747917   Dec: -39.09191298843  [deg; J2000]  
        { 01h 03m 10.9s , -39d 05' 30.9" }
         +/- 1.05073147786973 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.303704918290393 [arcmin] (formal 1-sigma fit error)
    SNR: 28.3410469731656
 
  Angular difference between the analysis and refined position is 1.260164 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 0.331999957561493 +/- 0.0368781685195268
        Measured from: -0.0480000376701355
                   to: 0.283999919891357     [s; relative to TRIGTIME]
     T50: 0.167999982833862 +/- 0.0178885001041659
        Measured from: 0.0399999618530273
                   to: 0.20799994468689     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.368000030517578     
                   to: 0.631999969482422     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0680000185966492     
                   to: 0.328000009059906     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.055112   0.105774   0.116167   0.042381
           0.005317   0.005656   0.006141   0.005017 [error]
 Peak      0.052671   0.125188   0.120020   0.041731
           0.007473   0.007231   0.007278   0.006096 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    0.396   -0.068    0.328
T90     0.332   -0.048    0.284
T50     0.168    0.040    0.208
Peak    1.000   -0.368    0.632
 
 
====== 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      -0.889    -0.102      0.103       -           -               -         5.24e-02     -2.99e-03          2.99e-03      73.710   57
CPL     -0.724    -0.211      0.427      446.613    -446.613      -446.613      6.20e-02     -1.19e-02          3.26e-02      73.210   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      -0.922     -0.118     0.120       -           -               -         2.24e-02     -1.47e-03          1.47e-03      80.540   57
CPL     -0.736     -0.241     0.486      391.375    -391.375      -391.375      2.70e-02     -5.81e-03          1.65e-02      80.030   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   1.50e-08  4.02e-08  8.67e-08  4.88e-07  2.34e-07  6.30e-07   erg/cm2
      90%_error_low -1.73e-09 -2.79e-09 -5.58e-09 -6.99e-08 -1.50e-08 -7.32e-08   erg/cm2
      90%_error_hi   1.81e-09  2.76e-09  5.55e-09  7.80e-08  1.51e-08  8.04e-08   erg/cm2
Peak flux       PL   5.31e-01  7.54e-01  7.96e-01  1.55e+00  2.57e+00  3.63e+00   ph/cm2/s
      90%_error_low -7.33e-02 -6.41e-02 -5.57e-02 -2.31e-01 -1.70e-01 -2.66e-01   ph/cm2/s
      90%_error_hi   7.74e-02  6.36e-02  5.54e-02  2.59e-01  1.70e-01  2.74e-01   ph/cm2/s
 
Fluence        CPL   1.44e-08  4.06e-08  8.83e-08  3.88e-07  2.32e-07  5.31e-07   erg/cm2
      90%_error_low -2.21e-09 -2.82e-09 -6.56e-09 -1.60e-07 -1.60e-08 -1.59e-07   erg/cm2
      90%_error_hi   1.83e-09  3.03e-09  6.72e-09  1.76e-07  1.54e-08  1.20e-07   erg/cm2
Peak flux      CPL   5.04e-01  7.61e-01  8.13e-01  1.27e+00  2.54e+00  3.35e+00   ph/cm2/s
      90%_error_low -9.36e-02 -6.65e-02 -6.55e-02 -4.69e-01 -1.78e-01 -5.07e-01   ph/cm2/s
      90%_error_hi   8.10e-02  6.72e-02  6.87e-02  3.51e-01  1.78e-01  4.44e-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
   15.7953   -39.0919   0.0068     2.0795   -17.4411         0.3202201     28.341 TRIG_00425647                 
 
Foreground time interval of the image:
 -0.068   0.328 (delta_t =   0.396 [sec])
Background time interval of the image:
-239.304  -0.068 (delta_t = 239.236 [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   -0.068 sec. to    0.328 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.889202     ( -0.101956   0.103162 )
Norm@50keV  : 5.23686E-02    ( -0.00299319   0.00298501 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.71 using 59 PHA bins.
# Reduced chi-squared =          1.293 for     57 degrees of freedom 
# Null hypothesis probability =   6.745055e-02
 
Photon flux (15-150 keV)    in 0.396 sec: 0.348156 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.33741e-07 ( -1.49673e-08  1.50503e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.068 sec. to    0.328 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.724474     ( -0.211146   0.427077 )
Epeak [keV] : 446.613      ( -446.622 -446.622 )
Norm@50keV  : 6.19740E-02    ( -0.0119018   0.0326322 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.21 using 59 PHA bins.
# Reduced chi-squared =          1.307 for     56 degrees of freedom 
# Null hypothesis probability =   6.105317e-02
 
Photon flux (15-150 keV)    in 0.396 sec: 5.96930 ( -0.35718  0.35611 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.3163e-07 ( -1.6037e-08  1.54427e-08 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from   -0.368 sec. to    0.632 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.922313     ( -0.11804   0.120325 )
Norm@50keV  : 2.23604E-02    ( -0.00147295   0.00146815 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          80.54 using 59 PHA bins.
# Reduced chi-squared =          1.413 for     57 degrees of freedom 
# Null hypothesis probability =   2.175967e-02
 
Photon flux (15-150 keV)    in 1 sec: 2.56723 ( -0.16997  0.17025 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.48828e-07 ( -1.76694e-08  1.77658e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.368 sec. to    0.632 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.735541     ( -0.241188   0.486472 )
Epeak [keV] : 391.375      ( -391.396 -391.396 )
Norm@50keV  : 2.70216E-02    ( -0.00581058   0.0164712 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          80.03 using 59 PHA bins.
# Reduced chi-squared =          1.429 for     56 degrees of freedom 
# Null hypothesis probability =   1.923312e-02
 
Photon flux (15-150 keV)    in 1 sec: 2.54430 ( -0.17826  0.17824 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.46122e-07 ( -1.91042e-08  1.85207e-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 = 3.464113287164557E-02, IMY = 1.088317170812843E-02

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:
-239.304000 -0.068000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 17.5768 -35.6480    2.4   3.7  -92.6   1.0123   4.8 ------	UNKNOWN

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

Time interval of the image:
-0.068000 0.328000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 15.7953 -39.0919    0.4   2.1  -17.4   0.3202  28.3 ------	UNKNOWN                       
 45.6624  -8.7600    2.2  40.8  -96.4   0.2425   5.3 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
32.596600 722.966000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
331.8588 -33.3268    3.2  35.6  110.7   2.7331   3.6 ------	UNKNOWN                       
346.1289 -71.5044    2.0  35.7   40.9   3.0860   5.7 ------	UNKNOWN                       
  5.4003  19.1346    3.7  59.0 -166.2   6.9233   3.1 ------	UNKNOWN                       
 24.1353  15.6601    5.0  55.3 -144.9   4.7895   2.3 ------	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