GRB140716A-1

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.

Special note: Due to the low partial coding fraction, the refined position is found using the DETECTION mask. Therefore, the refined position and the mask shadow pattern shown here are from analyses with DETECTION mask, everything else uses the FLUX mask.

==========================================================================
           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 Oct 21 01:37:36 EDT 2014
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/ground_detect_bursts/scripts
==========================================================================
 
  BAT Trigger Time: 427199289.6
               UTC: 2014-07-16T10:27:57.328   [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: 108.175   Dec: -60.153  [deg; J2000]
 
  Refined Position:   [ source = BAT pre-slew image ]
    RA: 108.175   Dec: -60.1531  [deg; J2000]
        { 07h 12m 42.0s , -60d -9' -11.2" }
        +/- 3.05557009359 [arcmin] (estimated 90% radius based on SNR)
    SNR: 6.16859515
 
 
  Angular difference between the analysis and refined position is 0.006000 arcmin
 
  Partial Coding Fraction: 6.933594e-02    [ including projection effects ]
 
  Duration
     T90: 124.800000071526 +/- 1.6
        Measured from: 4.8
                   to: 129.6     [s; relative to TRIGTIME]
     T50: 68.8000000119209 +/- 1.6
        Measured from: 33.6
                   to: 102.4     [s; relative to TRIGTIME]
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  136.000    0.000  136.000
T90   124.800    4.800  129.600
T50    68.800   33.600  102.400
Peak    1.000    0.300    1.300
 
 
====== 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      -1.801    -0.560      0.519       -           -               -         1.16e-02     -3.60e-03          3.50e-03      56.000   57
CPL     -1.455    -1.082      2.690       82.122      N/A           N/A         1.71e-02        N/A               N/A         55.910   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      -1.341     -0.396     0.399       -           -               -         4.99e-02     -1.18e-02          1.18e-02      42.790   57
CPL     -0.184     -1.417     2.856       92.847     -33.970       -92.847      1.57e-01     -1.57e-01          1.86e+00      41.630   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   1.46e-07  2.24e-07  2.57e-07  5.64e-07  7.94e-07  1.19e-06   erg/cm2
      90%_error_low -6.71e-08 -6.98e-08 -1.03e-07 -3.58e-07 -2.45e-07 -4.78e-07   erg/cm2
      90%_error_hi   7.75e-08  6.83e-08  9.99e-08  6.06e-07  2.47e-07  6.45e-07   erg/cm2
Peak flux       PL   1.76e+00  1.95e+00  1.54e+00  2.01e+00  6.00e+00  7.27e+00   ph/cm2/s
      90%_error_low -7.30e-01 -5.60e-01 -4.07e-01 -9.14e-01 -1.52e+00 -1.72e+00   ph/cm2/s
      90%_error_hi   8.60e-01  5.48e-01  3.98e-01  1.24e+00  1.54e+00  1.72e+00   ph/cm2/s
 
Fluence        CPL    N/A      N/A      N/A      N/A      N/A      N/A      erg/cm2
      90%_error_low -6.71e-08 -6.98e-08 -1.03e-07 -3.58e-07 -2.45e-07 -4.78e-07   erg/cm2
      90%_error_hi   7.75e-08  6.83e-08  9.99e-08  6.06e-07  2.47e-07  6.45e-07   erg/cm2
Peak flux      CPL   6.87e-01  4.33e-01  1.84e-01  1.29e-01  1.36e+00  1.43e+00   ph/cm2/s
      90%_error_low -6.87e-01 9.45e-01 -1.84e-01 -1.29e-01     N/A       N/A     ph/cm2/s
      90%_error_hi   1.34e+00  2.24e+00  2.29e+00  2.49e-01     N/A       N/A     ph/cm2/s
 
======================================================================

Special notes of this burst

Image

15.0-350.0 keV image (Event data; DETECTION mask)

#RAcent DECcent POSerr Theta  Phi  Peak_Cts  SNR Name
108.141 -60.147 0.000 58.312 -176.220 4.622 16.491 TRIG_00604793
 
Image time interval: 98.400 to 108.532 [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    7.460 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.8009     ( -0.560347   0.519496 )
Norm@50keV  : 1.15642E-02    ( -0.0035987   0.00349883 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.00 using 59 PHA bins.
# Reduced chi-squared =         0.9824 for     57 degrees of freedom 
# Null hypothesis probability =   5.127505e-01
 
Photon flux (15-150 keV)    in 7.46 sec: 1.59416 ( -0.49909  0.50656 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.94289e-07 ( -2.44686e-07  2.4721e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.000 sec. to    7.460 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.45522     ( -1.08221   2.68991 )
Epeak [keV] : 82.1216      (   )
Norm@50keV  : 1.70968E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.91 using 59 PHA bins.
# Reduced chi-squared =         0.9983 for     56 degrees of freedom 
# Null hypothesis probability =   4.784055e-01
 
Photon flux (15-150 keV)    in 7.46 sec: 1.56601 ( -0.5248  0.5248 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    0.300 sec. to    1.300 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.34055     ( -0.395932   0.398579 )
Norm@50keV  : 4.99247E-02    ( -0.0118401   0.0118225 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.79 using 59 PHA bins.
# Reduced chi-squared =         0.7507 for     57 degrees of freedom 
# Null hypothesis probability =   9.187962e-01
 
Photon flux (15-150 keV)    in 1 sec: 6.00296 ( -1.51899  1.539 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.88709e-07 ( -1.19995e-07  1.20365e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.300 sec. to    1.300 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.184414     ( -1.41678   2.85592 )
Epeak [keV] : 92.8469      ( -33.9636 -92.8409 )
Norm@50keV  : 0.157427    ( -0.157466   1.85706 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.63 using 59 PHA bins.
# Reduced chi-squared =         0.7434 for     56 degrees of freedom 
# Null hypothesis probability =   9.237264e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.35683 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.75795e-07 ( -1.24777e-07  1.243e-07 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 124.8 sec.
Hardness ratio (energy fluence ratio) = 1.14802134028

S(15-50 keV) vs. S(50-150 keV) plot

S(15-50 keV)  = 3.699412e-07
S(50-150 keV) = 4.243606e-07

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 (with DETECTION mask)

IMX = -1.61637595548, IMY = 0.106785482856

Spacecraft aspect plot

Bright source in the event data image

Event data image of 15-350 keV band

Time interval of the image:
-0.028000 7.460000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4546 -40.7273   14.6  37.1 -156.1   0.0306   0.8   10.9	Vela X-1                      
170.3153 -60.6223  203.7  37.4  154.8  -0.0029  -0.1    0.0	Cen X-3                       
186.3398 -62.8099    5.6  40.3  143.1   0.1477   2.1    9.0	GX 301-2                      
138.5775 -52.1596    1.9  39.8 -174.3   0.2573   6.1 ------	UNKNOWN

Webpage updated on:
Fri Dec 18 18:34:58 EST 2015

Analysis Summary

Notes:

Special note: Due to the low partial coding fraction, the refined position is found using the DETECTION mask. Therefore, the refined position and the mask shadow pattern shown here are from analyses with DETECTION mask, everything else uses the FLUX mask.

Image

15.0-350.0 keV image (Event data; DETECTION mask)

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 (with DETECTION mask)

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