batgrbproduct analysis for trigger=678929

batgrbproduct Analysis for Trigger=678929

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 (local time): Mon Mar 28 14:22:03 EDT 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger678929
======================================================================

  Trigger: 00678929      Segment: 000

  BAT Trigger Time: 479529451.776   [s; MET]
      Trigger Stop: 479529478.656   [s; MET]
               UTC: 2016-03-13T02:37:15.804900    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 183.787873774764   Dec: 57.2928358615757  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.71
     Image Trigger?:     NO
     Rate S/N Ratio:     9.89949493661167  [ if not an image trigger ]
     Image S/N Ratio:    8.71

  Flight Position:   [ source = BAT ]
    RA: 183.787873774764   Dec: 57.2928358615757  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 183.819620681679   Dec: 57.2799178763181  [deg; J2000]  
        { 12h 15m 16.7s , +57d 16' 47.7" }
         +/- 2.00346933649191 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.93537714587284 [arcmin] (formal 1-sigma fit error)
    SNR: 11.2719807218026
 
  Angular difference between Flight and Ground position is 1.288601 arcmin
 
  Partial Coding Fraction: 0.8046875    [ including projection effects ]

  Duration
     T90: 41.5359999537468 +/- 6.18321240663874
        Measured from: -1.45200002193451
                   to: 40.0839999318123     [s; relative to TRIGTIME]
     T50: 22.3679999709129 +/- 5.97979697204795
        Measured from: 5.83199995756149
                   to: 28.1999999284744     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 24.7919999957085     
                   to: 25.7919999957085     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -5.60400003194809     
                   to: 44.6559999585152     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.268840   0.269509   0.329309   0.083141
           0.038766   0.040436   0.034956   0.029407 [error]
 Peak      0.013690   0.019137   0.010443   0.009083
           0.005538   0.005901   0.004941   0.004190 [error]

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

======================================================================
 
=== 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   Power-law 6.43e-08 1.33e-07 2.16e-07 7.84e-07 5.98e-07 1.20e-06   erg/cm2
              Error 1.54e-08 1.87e-08 3.44e-08 2.87e-07 8.51e-08 3.08e-07   erg/cm2
Peak flux Power-law 1.33e-01 1.19e-01 7.39e-02 6.97e-02 3.55e-01 3.95e-01   ph/cm2/s
              Error 7.60e-02 4.46e-02 4.13e-02 9.07e-02 1.32e-01 1.52e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.53e-08 1.32e-07 2.14e-07 8.44e-07 5.98e-07 1.15e-06   erg/cm2
              Error 1.81e-08 -------- 4.09e-08 3.04e-07 1.00e-07 3.96e-07   erg/cm2
Peak flux Cutoff-PL 1.35e-01 1.19e-01 7.31e-02 7.59e-02 3.56e-01 3.94e-01   ph/cm2/s
              Error 6.13e-02 4.42e-02 4.21e-02 -------- 1.32e-01 1.58e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band -------- -------- -------- -------- -------- --------   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s

 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.304    0.234    -      -           1.20e-03 1.52e-04   75.620 57
CPL   1.305    0.434    9999.3    0.0      1.21e-03 1.14e-03   75.630 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.690    0.751    -      -           2.68e-03 1.17e-03   69.010 57
CPL   1.694    1.075    9999.1   -0.0      2.67e-03 0.00e+00   69.010 56
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^-{Ph_index} (minus sign is not included in the 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 PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedom

 
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
 
T90 in the 50-300 keV band: 33.664000 sec.
T50 in the 50-300 keV band: 20.992000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   50.260   -5.604   44.656
T90    41.536   -1.452   40.084
T50    22.368    5.832   28.200
Peak    1.000   24.792   25.792

Click here for the BAT GCN circular template

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  183.8196    57.2799   0.0171    17.9582  -102.9766         0.9208755     11.272 TRIG_00678929                 
 
Foreground time interval of the image:
 -5.604  44.656 (delta_t =  50.260 [sec])
Background time interval of the image:
-239.275  -5.604 (delta_t = 233.671 [sec])

Lightcurves

Notes:

1) The mask-weighted light curves are using the flight position.
2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
3) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
4) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
5) Time of each bin is in the middle of the bin.

1 s binning

From T0-310 s to T0+310 s

From T100_start - 20 s to T100_end + 30 s

Full time interval

64 ms binning

Full time interval

From T100_start to T100_end

From T0-5 sec to T0+5 sec

16 ms binning

From T100_start-5 s to T100_start+5 s

8 ms binning

From T100_start-3 s to T100_start+3 s

2 ms binning

From T100_start-1 s to T100_start+1 s

SN=5 or 10 sec. binning (whichever binning is satisfied first)

SN=5 or 10 sec. binning (T < 200 sec)

Quad-rate summed light curves (from T0-300s to T0+1000s)

Spectral Evolution

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   -5.604 sec. to   44.656 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.30371     ( -0.235242   0.233708 )
Norm@50keV  : 1.20329E-03    ( -0.000151628   0.000151411 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          75.62 using 59 PHA bins.
# Reduced chi-squared =          1.327 for     57 degrees of freedom 
# Null hypothesis probability =   5.004063e-02
 
Photon flux (15-150 keV)    in 50.26 sec: 0.143656 ( -0.018527  0.018599 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.97149e-07 ( -8.46861e-08  8.5539e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -5.604 sec. to   44.656 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.30547     ( -0.63704   0.230038 )
Epeak [keV] : 9999.32      ( -9999.36 -9999.36 )
Norm@50keV  : 1.20549E-03    ( -0.00120792   0.00106483 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          75.63 using 59 PHA bins.
# Reduced chi-squared =          1.351 for     56 degrees of freedom 
# Null hypothesis probability =   4.134737e-02
 
Photon flux (15-150 keV)    in 50.26 sec: 0.144593 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.00155e-07 ( -1.02724e-07  9.76959e-08 ) ergs/cm2

Band function

Time interval is from   -5.604 sec. to   44.656 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.05560   ( 1.05555   1.05555 )
beta        : -1.30370    ( 1.3037   0.235211 )
Epeak [keV] : 39.3965      ( -39.4323 -39.4323 )
Norm@50keV   : 2.27946E-03    ( -0.00122647   305.634 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          75.62 using 59 PHA bins.
# Reduced chi-squared =          1.375 for     55 degrees of freedom 
# Null hypothesis probability =   3.400949e-02
 
Photon flux (15-150 keV)    in 50.26 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 19.4484  (-3.38154  4.26308)
R^2/D10^2   : 6.87041E-03  (-0.00326253   0.00608692)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          95.53 using 59 PHA bins.
# Reduced chi-squared =          1.676 for     57 degrees of freedom 
# Null hypothesis probability =   1.049800e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.545e-08   7.378e-09
25- 50  1.244e-07   2.905e-08
50-150  3.474e-07   8.587e-08
15-150  4.972e-07   9.559e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-48.0066      -200)
Norm        : 0.592479       (-0.0752603     0.0752603)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          80.00 using 59 PHA bins.
# Reduced chi-squared =          1.404 for     57 degrees of freedom 
# Null hypothesis probability =   2.392327e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.415e-08   4.199e-08
25- 50  1.426e-07   8.014e-08
50-150  3.128e-07   1.724e-07
15-150  5.296e-07   2.925e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.99326        (-1.76524      2.61278)
R1^2/D10^2  : 0.500716        (-0.402163      3.30126)
kT2 [keV]   : 27.6896        (-6.2426      12.155)
R2^2/D10^2  : 1.97344E-03    (-0.00133266   0.00252568)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.04 using 59 PHA bins.
# Reduced chi-squared =          1.346 for     55 degrees of freedom 
# Null hypothesis probability =   4.436902e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.335e-08   3.728e-08
25- 50  1.140e-07   4.368e-08
50-150  4.154e-07   1.845e-07
15-150  6.028e-07   2.501e-07

Peak spectrum fit

Power-law model

Time interval is from   24.792 sec. to   25.792 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.69041     ( -0.703255   0.797865 )
Norm@50keV  : 2.68253E-03    ( -0.00122336   0.00111309 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.01 using 59 PHA bins.
# Reduced chi-squared =          1.211 for     57 degrees of freedom 
# Null hypothesis probability =   1.323051e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.355099 ( -0.131712  0.131752 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.48599e-08 ( -1.09546e-08  1.16382e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   24.792 sec. to   25.792 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.69420     ( -1.04221   1.10829 )
Epeak [keV] : 9999.14      ( -9999.34 -9999.35 )
Norm@50keV  : 2.66864E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.01 using 59 PHA bins.
# Reduced chi-squared =          1.232 for     56 degrees of freedom 
# Null hypothesis probability =   1.137162e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.355642 ( -0.132468  0.131373 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.50484e-08 ( -1.18306e-08  8.00529e-09 ) ergs/cm2

Band function

Time interval is from   24.792 sec. to   25.792 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.99507   ( -4.99507   -4.99507 )
beta        : -1.75539    ( -1.0158   0.740425 )
Epeak [keV] : 20.6579      ( -20.6579 65.1291 )
Norm@50keV   : 1141.90    ( -420.811   4.47055e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.83 using 59 PHA bins.
# Reduced chi-squared =          1.252 for     55 degrees of freedom 
# Null hypothesis probability =   9.946536e-02
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 12.7182  (-6.18603  10.3363)
R^2/D10^2   : 6.83220E-02  (-0.0665532   0.683784)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.93 using 59 PHA bins.
# Reduced chi-squared =          1.262 for     57 degrees of freedom 
# Null hypothesis probability =   8.792367e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.344e-09   1.581e-09
25- 50  7.882e-09   5.005e-09
50-150  7.955e-09   5.905e-09
15-150  1.818e-08   1.260e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 155.376       (-119.221      -152.344)
Norm        : 1.45312       (-0.558423     1.14819)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.22 using 59 PHA bins.
# Reduced chi-squared =          1.214 for     57 degrees of freedom 
# Null hypothesis probability =   1.286505e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.721e-09   2.244e-09
25- 50  6.931e-09   4.192e-09
50-150  1.388e-08   9.150e-09
15-150  2.453e-08   1.559e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.44787        (-2.08102      57.3627)
R1^2/D10^2  : 2.49541        (-2.43973      1608.48)
kT2 [keV]   : 21.0193        (-19.5626      -21.0198)
R2^2/D10^2  : 9.52632E-03    (-0.00951256   0.11874)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.81 using 59 PHA bins.
# Reduced chi-squared =          1.251 for     55 degrees of freedom 
# Null hypothesis probability =   9.985743e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.504e-09   2.815e-09
25- 50  5.883e-09   3.211e-09
50-150  1.350e-08   9.390e-09
15-150  2.389e-08   1.315e-08

Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)

Power-law model

 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.30371     ( -0.235242   0.233708 )
Norm@50keV  : 1.20329E-03    ( -0.000151628   0.000151411 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          75.62 using 59 PHA bins.
# Reduced chi-squared =          1.327 for     57 degrees of freedom 
# Null hypothesis probability =   5.004063e-02
 
Photon flux (15-150 keV)    in 50.26 sec: 0.143654 ( -0.0185262  0.0185979 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.97089e-07 ( -8.46851e-08  8.55355e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.30511     ( -0.636682   0.230361 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 1.20556E-03    ( -0.00120794   0.00110413 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          75.63 using 59 PHA bins.
# Reduced chi-squared =          1.351 for     56 degrees of freedom 
# Null hypothesis probability =   4.134882e-02
 
Photon flux (15-150 keV)    in 50.26 sec: 0.143834 ( -0.018775  0.018374 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.94792e-07 ( -8.25671e-08  8.69649e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.05560   ( 1.05555   1.05555 )
beta        : -1.30370    ( 1.3037   0.235211 )
Epeak [keV] : 39.3965      ( -39.4323 -39.4323 )
Norm@50keV   : 2.27946E-03    ( -0.00122647   19.1704 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          75.62 using 59 PHA bins.
# Reduced chi-squared =          1.375 for     55 degrees of freedom 
# Null hypothesis probability =   3.400949e-02
 
Photon flux (15-150 keV)    in 50.26 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

S(25-50 keV) vs. S(50-100 keV) plot

S(25-50 keV)  = 1.33e-07
S(50-100 keV) = 2.16e-07

T90 vs. Hardness ratio plot

T90                                   = 41.5359999537468 sec.
Hardness ratio (energy fluence ratio) = 1.62406

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.00249
Count Ratio (50-100 keV) / (15-25 keV) = 1.22493

Mask shadow pattern

IMX = -7.278023838885109E-02, IMY = 3.158355388760571E-01

TIME vs. PHA plot around the trigger time

TIME vs. DetID plot around the trigger time

100 us light curve (15-350 keV)

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:
-239.275410 -5.604000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
107.9321  34.7983    2.2  58.1 -173.9   5.5483   5.3 ------	UNKNOWN                       
218.1220  41.7978    3.3  26.8  -31.7   0.6596   3.5 ------	UNKNOWN

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

Time interval of the image:
-5.604000 44.656000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
191.2205   3.7359    3.0  36.4   60.7   0.6349   3.9 ------	UNKNOWN                       
216.1134   3.2927    3.0  47.1   26.5   0.7863   3.9 ------	UNKNOWN                       
181.3940  41.9576    2.4   2.8 -125.5   0.3481   4.9 ------	UNKNOWN                       
183.8196  57.2799    1.0  18.0 -103.0   0.9207  11.3 ------	UNKNOWN                       
242.1888  22.0814    2.1  53.0  -14.4   1.0791   5.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
136.724600 921.924600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.6005  35.2902    9.3  50.9  -18.7   1.1532   1.2    7.7	Her X-1                       
140.2402  23.4408    3.6  46.0  139.1   5.5155   3.2 ------	UNKNOWN                       
196.4739  46.0944    2.6  13.6   37.4   1.5921   4.5 ------	UNKNOWN                       
 95.7499  38.4940    4.9  57.5 -170.4   4.8374   2.4 ------	UNKNOWN

Plot creation:
Mon Mar 28 14:49:37 EDT 2016