GRB150710A

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: Fri Aug  7 22:55:28 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger648437
======================================================================

  Trigger: 00648437      Segment: 000

  BAT Trigger Time: 458180897.568   [s; MET]
      Trigger Stop: 458180897.6   [s; MET]
               UTC: 2015-07-10T00:28:02.736460    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 194.497391403333   Dec: 14.3051430419731  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.75
     Image Trigger?:     NO
     Rate S/N Ratio:     48.6929152957594  [ if not an image trigger ]
     Image S/N Ratio:    9.75

  Analysis Position:   [ source = BAT ]
    RA: 194.497391403333   Dec: 14.3051430419731  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 194.485162921384   Dec: 14.3097054032528  [deg; J2000]  
        { 12h 57m 56.4s , +14d 18' 34.9" }
         +/- 1.49088655464398 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.60543605573073 [arcmin] (formal 1-sigma fit error)
    SNR: 17.192553428323
 
  Angular difference between the analysis and refined position is 0.761832 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 0.151999950408936 +/- 0.0601331884316159
        Measured from: 0.015999972820282
                   to: 0.167999923229218     [s; relative to TRIGTIME]
     T50: 0.0479999780654907 +/- 0.0144221847352656
        Measured from: 0.0199999809265137
                   to: 0.0679999589920044     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.378000020980835     
                   to: 0.621999979019165     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.015999972820282     
                   to: 0.223999977111816     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.012402   0.027987   0.039914   0.019666
           0.002778   0.003343   0.003644   0.002799 [error]
 Peak      0.009957   0.036839   0.038824   0.021161
           0.005164   0.005548   0.005377   0.004433 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    0.208    0.016    0.224
T90     0.152    0.016    0.168
T50     0.048    0.020    0.068
Peak    1.000   -0.378    0.622
 
 
====== 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      -0.636    -0.200      0.210       -           -               -         2.71e-02     -3.27e-03          3.22e-03      55.810   57
CPL     -0.396    -0.417      0.981      403.658    -403.658      -403.658      3.43e-02     -9.94e-03          5.09e-02      55.570   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      -0.664     -0.285     0.314       -           -               -         6.37e-03     -1.13e-03          1.10e-03      41.770   57
CPL     -0.657     -0.285     0.319     9999.360    -9999.360      -9999.360      6.43e-03     -1.14e-03          1.72e-02      41.770   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   3.23e-09  1.01e-08  2.61e-08  1.93e-07  7.09e-08  2.32e-07   erg/cm2
      90%_error_low -7.83e-10 -1.54e-09 -3.13e-09 -4.95e-08 -8.83e-09 -5.12e-08   erg/cm2
      90%_error_hi   8.55e-10  1.51e-09  3.10e-09  6.15e-08  8.88e-09  6.22e-08   erg/cm2
Peak flux       PL   1.18e-01  1.97e-01  2.49e-01  6.27e-01  7.39e-01  1.19e+00   ph/cm2/s
      90%_error_low -4.24e-02 -4.68e-02 -3.96e-02 -1.98e-01 -1.21e-01 -2.18e-01   ph/cm2/s
      90%_error_hi   4.91e-02  4.58e-02  3.94e-02  2.61e-01  1.21e-01  2.45e-01   ph/cm2/s
 
Fluence        CPL   2.14e-11  4.26e-10  4.25e-10  1.26e-09  6.31e-10  2.99e-09   erg/cm2
      90%_error_low    N/A       N/A       N/A       N/A       N/A       N/A      erg/cm2
      90%_error_hi     N/A       N/A       N/A       N/A       N/A       N/A      erg/cm2
Peak flux      CPL   1.18e-01  1.97e-01  2.49e-01  6.25e-01  7.39e-01  1.19e+00   ph/cm2/s
      90%_error_low -5.41e-02 -4.48e-02 -3.95e-02 -6.25e-01 -1.20e-01 -4.49e-01   ph/cm2/s
      90%_error_hi   3.13e-02  4.80e-02  5.42e-02  1.31e-01  1.21e-01  2.24e-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
  194.4852    14.3097   0.0111     5.7392    52.8854         0.1024303     17.193 TRIG_00648437                 
 
Foreground time interval of the image:
  0.016   0.224 (delta_t =   0.208 [sec])
Background time interval of the image:
-239.568   0.016 (delta_t = 239.584 [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    0.016 sec. to    0.224 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.63614     ( -0.200031   0.209712 )
Norm@50keV  : 2.71103E-02    ( -0.00326803   0.0032222 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.81 using 59 PHA bins.
# Reduced chi-squared =         0.9791 for     57 degrees of freedom 
# Null hypothesis probability =   5.199094e-01
 
Photon flux (15-150 keV)    in 0.208 sec: 3.15223 ( -0.35908  0.35939 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.08914e-08 ( -8.82975e-09  8.87929e-09 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.016 sec. to    0.224 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.395515     ( -0.41674   0.980914 )
Epeak [keV] : 403.658      ( -403.737 -403.737 )
Norm@50keV  : 3.42963E-02    ( -0.00994221   0.0508782 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.57 using 59 PHA bins.
# Reduced chi-squared =         0.9923 for     56 degrees of freedom 
# Null hypothesis probability =   4.911649e-01
 
Photon flux (15-150 keV)    in 0.208 sec: 3.13138 ( -0.36654  0.36643 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.31486e-10 ( 0  0 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from   -0.378 sec. to    0.622 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.663887     ( -0.284562   0.314115 )
Norm@50keV  : 6.37336E-03    ( -0.00113327   0.00109659 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.77 using 59 PHA bins.
# Reduced chi-squared =         0.7328 for     57 degrees of freedom 
# Null hypothesis probability =   9.349917e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.738999 ( -0.120711  0.121485 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.90952e-08 ( -1.31353e-08  1.32044e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.378 sec. to    0.622 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.657266     ( -0.28579   0.318128 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 6.42644E-03    ( -0.00113756   0.0172088 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.77 using 59 PHA bins.
# Reduced chi-squared =         0.7459 for     56 degrees of freedom 
# Null hypothesis probability =   9.214114e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.739030 ( -0.120425  0.120782 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.91061e-08 ( -8.01749e-09  1.26152e-08 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 0.152 sec.
Hardness ratio (energy fluence ratio) = 2.57371078586

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

S(15-50 keV)  = 1.3354872e-08
S(50-150 keV) = 5.753583e-08

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 = 6.064522092054508E-02, IMY = -8.014500274109104E-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:
-239.568000 0.016000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
239.6722  41.8725    2.5  52.8   26.5   4.3046   4.6 ------	UNKNOWN                       
194.6551  65.4771    2.8  52.9  -17.0   1.9724   4.1 ------	UNKNOWN                       
153.4394 -34.2174    2.5  57.7 -165.5   4.5840   4.6 ------	UNKNOWN                       
148.0582 -31.2082    3.4  58.8 -159.2   5.1862   3.4 ------	UNKNOWN

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

Time interval of the image:
0.016000 0.224000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
194.4852  14.3097    0.7   5.7   52.9   0.1024  17.2 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
32.732600 962.497800
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
236.2058  47.7733    3.0  48.0   16.4   4.4236   3.8 ------	UNKNOWN                       
233.8533  53.5158    3.8  49.9    8.9   3.7224   3.0 ------	UNKNOWN                       
206.9800  21.1493    3.8  13.7   37.7   1.4276   3.0 ------	UNKNOWN                       
183.6665 -19.1805    2.6  35.2  177.3   2.7801   4.4 ------	UNKNOWN                       
182.9973 -18.9017    2.7  35.1  178.5   2.5342   4.2 ------	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