batgrbproduct analysis for trigger=680436

batgrbproduct Analysis for Trigger=680436

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): Thu Apr 14 18:20:30 EDT 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger680436
======================================================================

  Trigger: 00680436      Segment: 000

  BAT Trigger Time: 480582019.648   [s; MET]
      Trigger Stop: 480582020.16   [s; MET]
               UTC: 2016-03-25T07:00:03.619340    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 15.5965562068455   Dec: -72.7063681344509  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.49
     Image Trigger?:     NO
     Rate S/N Ratio:     25.2784493195291  [ if not an image trigger ]
     Image S/N Ratio:    10.49

  Flight Position:   [ source = BAT ]
    RA: 15.5965562068455   Dec: -72.7063681344509  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 15.6955921764478   Dec: -72.7017317557842  [deg; J2000]  
        { 01h 02m 46.9s , -72d 42' 06.2" }
         +/- 0.544890620605329 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.155575275615021 [arcmin] (formal 1-sigma fit error)
    SNR: 72.4134657961675
 
  Angular difference between Flight and Ground position is 1.788415 arcmin
 
  Partial Coding Fraction: 0.9609375    [ including projection effects ]

  Duration
     T90: 61.7239999771118 +/- 12.0532560498552
        Measured from: -40.9240000247955
                   to: 20.7999999523163     [s; relative to TRIGTIME]
     T50: 26.5359998941422 +/- 4.86102046732467
        Measured from: -35.5759999752045
                   to: -9.04000008106232     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -33.4679999947548     
                   to: -32.4679999947548     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -51.7480000257492     
                   to: 59.3799999952316     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.414276   3.780245   3.385529   0.939801
           0.061473   0.065641   0.059625   0.051459 [error]
 Peak      0.134600   0.234638   0.227754   0.074036
           0.007672   0.009037   0.008956   0.006875 [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 7.34e-07 1.56e-06 2.58e-06 9.71e-06 7.10e-06 1.46e-05   erg/cm2
              Error 3.49e-08 4.24e-08 6.36e-08 5.76e-07 1.61e-07 5.99e-07   erg/cm2
Peak flux Power-law 1.28e+00 1.63e+00 1.51e+00 2.46e+00 5.25e+00 6.88e+00   ph/cm2/s
              Error 1.08e-01 8.21e-02 7.22e-02 2.55e-01 2.25e-01 3.14e-01   ph/cm2/s
 
Fluence   Cutoff-PL 7.04e-07 1.57e-06 2.61e-06 8.01e-06 7.04e-06 1.29e-05   erg/cm2
              Error 4.71e-08 4.40e-08 7.53e-08 1.65e-06 1.74e-07 1.65e-06   erg/cm2
Peak flux Cutoff-PL 1.22e+00 1.65e+00 1.54e+00 2.00e+00 5.21e+00 6.41e+00   ph/cm2/s
              Error 1.32e-01 8.78e-02 8.66e-02 5.22e-01 2.33e-01 5.93e-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    1.270    0.042    -      -           6.42e-03 1.40e-04   37.260 57
CPL   1.119    0.122     340.7  -96.1      7.46e-03 1.09e-03   34.810 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.109    0.075    -      -           4.52e-02 1.89e-03   44.020 57
CPL   0.917    0.258     316.8    0.0      5.53e-02 1.54e-02   42.610 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: 42.816000 sec.
T50 in the 50-300 keV band: 8.832000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  111.128  -51.748   59.380
T90    61.724  -40.924   20.800
T50    26.536  -35.576   -9.040
Peak    1.000  -33.468  -32.468

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
   15.6956   -72.7017   0.0026    19.9236     8.4173         8.1938033     72.413 TRIG_00680436                 
 
Foreground time interval of the image:
-37.547  10.253 (delta_t =  47.800 [sec])
Background time interval of the image:

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

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

8 ms binning

From T100_start-3 s to T100_start+3 s

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

2 ms binning

From T100_start-1 s to T100_start+1 s

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

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  -51.748 sec. to   59.380 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.27033     ( -0.0416918   0.0415707 )
Norm@50keV  : 6.42151E-03    ( -0.00014019   0.000140054 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          37.26 using 59 PHA bins.
# Reduced chi-squared =         0.6537 for     57 degrees of freedom 
# Null hypothesis probability =   9.800420e-01
 
Photon flux (15-150 keV)    in 111.1 sec: 0.762081 ( -0.018298  0.018347 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.1032e-06 ( -1.60729e-07  1.60937e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -51.748 sec. to   59.380 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.11926     ( -0.170199   0.0734339 )
Epeak [keV] : 340.686      ( -148.392 -340.689 )
Norm@50keV  : 7.45783E-03    ( -0.000844095   0.00132833 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          34.81 using 59 PHA bins.
# Reduced chi-squared =         0.6216 for     56 degrees of freedom 
# Null hypothesis probability =   9.882856e-01
 
Photon flux (15-150 keV)    in 111.1 sec: 0.753525 ( -0.020324  0.020436 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.04132e-06 ( -1.74839e-07  1.74143e-07 ) ergs/cm2

Band function

Time interval is from  -51.748 sec. to   59.380 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.11833   ( 0.785692   5.44766 )
beta        : -1.54629    ( 1.72062   0.470818 )
Epeak [keV] : 339.965      ( -344.063 -344.063 )
Norm@50keV   : 7.46122E-03    ( -0.000490641   0.00134094 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          34.81 using 59 PHA bins.
# Reduced chi-squared =         0.6329 for     55 degrees of freedom 
# Null hypothesis probability =   9.847437e-01
 
Photon flux (15-150 keV)    in 111.1 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]    : 19.8826  (  )
R^2/D10^2   : 3.40309E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         400.16 using 59 PHA bins.
# Reduced chi-squared =         7.0204 for     57 degrees of freedom 
# Null hypothesis probability =   4.950604e-53
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.888e-07   1.267e-08
25- 50  1.433e-06   4.722e-08
50-150  4.196e-06   1.444e-07
15-150  5.918e-06   1.494e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 3.25444       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         193.48 using 59 PHA bins.
# Reduced chi-squared =         3.3944 for     57 degrees of freedom 
# Null hypothesis probability =   9.428969e-17
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.003e-07   2.216e-08
25- 50  1.732e-06   4.222e-08
50-150  3.798e-06   9.555e-08
15-150  6.431e-06   1.444e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.14295        (-0.787798      0.857678)
R1^2/D10^2  : 0.390900        (-0.105982      0.158033)
kT2 [keV]   : 31.9364        (-2.65582      3.49822)
R2^2/D10^2  : 5.99418E-03    (-0.00175633   0.00208357)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.82 using 59 PHA bins.
# Reduced chi-squared =         0.7786 for     55 degrees of freedom 
# Null hypothesis probability =   8.839721e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.296e-07   5.227e-08
25- 50  1.598e-06   7.666e-08
50-150  4.795e-06   2.416e-07
15-150  7.023e-06   2.983e-07

Peak spectrum fit

Power-law model

Time interval is from  -33.468 sec. to  -32.468 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.10914     ( -0.0748868   0.0745419 )
Norm@50keV  : 4.52392E-02    ( -0.00188758   0.0018872 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.02 using 59 PHA bins.
# Reduced chi-squared =         0.7723 for     57 degrees of freedom 
# Null hypothesis probability =   8.959240e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.25219 ( -0.22456  0.22473 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.71672e-07 ( -2.20578e-08  2.21268e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from  -33.468 sec. to  -32.468 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.917082     ( -0.292646   0.223566 )
Epeak [keV] : 316.808      ( -316.808 -316.808 )
Norm@50keV  : 5.53485E-02    ( -0.0115679   0.0191703 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.61 using 59 PHA bins.
# Reduced chi-squared =         0.7609 for     56 degrees of freedom 
# Null hypothesis probability =   9.063593e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.20682 ( -0.23346  0.23346 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.66692e-07 ( -2.34203e-08  2.33011e-08 ) ergs/cm2

Band function

Time interval is from  -33.468 sec. to  -32.468 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.608753   ( 0.641598   0.641598 )
beta        : -1.18260    ( 1.18227   0.122805 )
Epeak [keV] : 111.825      ( -111.248 795.416 )
Norm@50keV   : 8.66898E-02    ( -0.042972   1397.85 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.35 using 59 PHA bins.
# Reduced chi-squared =         0.7699 for     55 degrees of freedom 
# Null hypothesis probability =   8.941719e-01
 
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]    : 20.3721  (  )
R^2/D10^2   : 0.231664  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         148.90 using 59 PHA bins.
# Reduced chi-squared =         2.6123 for     57 degrees of freedom 
# Null hypothesis probability =   3.793668e-10
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.840e-08   1.630e-09
25- 50  9.275e-08   5.525e-09
50-150  2.860e-07   1.955e-08
15-150  3.972e-07   2.110e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 21.4720       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         137.66 using 59 PHA bins.
# Reduced chi-squared =         2.4151 for     57 degrees of freedom 
# Null hypothesis probability =   1.267451e-08
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.347e-08   2.480e-09
25- 50  1.028e-07   4.435e-09
50-150  2.256e-07   1.110e-08
15-150  3.819e-07   1.770e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.42946        (-1.36056      1.51547)
R1^2/D10^2  : 2.25144        (-0.865413      1.65876)
kT2 [keV]   : 34.7294        (-5.0056      8.00837)
R2^2/D10^2  : 3.60409E-02    (-0.0170499   0.0239101)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.21 using 59 PHA bins.
# Reduced chi-squared =         0.7493 for     55 degrees of freedom 
# Null hypothesis probability =   9.160659e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.618e-08   5.835e-09
25- 50  9.771e-08   1.297e-08
50-150  3.378e-07   6.055e-08
15-150  4.717e-07   7.270e-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: 1.24572     ( -0.0386259   0.0385021 )
Norm@50keV  : 1.16838E-02    ( -0.000239257   0.000239067 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          34.74 using 59 PHA bins.
# Reduced chi-squared =         0.6095 for     57 degrees of freedom 
# Null hypothesis probability =   9.912758e-01
 
Photon flux (15-150 keV)    in 47.8 sec: 1.38092 ( -0.0310314  0.0311119 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.59561e-06 ( -1.17676e-07  1.1777e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.08912     ( -0.158839   0.0782364 )
Epeak [keV] : 342.576      ( -141.672 4586.35 )
Norm@50keV  : 1.36309E-02    ( -0.00177709   0.00224005 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          31.72 using 59 PHA bins.
# Reduced chi-squared =         0.5665 for     56 degrees of freedom 
# Null hypothesis probability =   9.963402e-01
 
Photon flux (15-150 keV)    in 47.8 sec: 1.36526 ( -0.03423  0.03436 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.55135e-06 ( -1.26957e-07  1.26574e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.640720   ( -0.48401   1.83083 )
beta        : -1.30237    ( 1.30193   0.0612726 )
Epeak [keV] : 89.7107      ( -51.2085 298.932 )
Norm@50keV   : 2.53693E-02    ( -0.0131162   0.21106 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          29.63 using 59 PHA bins.
# Reduced chi-squared =         0.5387 for     55 degrees of freedom 
# Null hypothesis probability =   9.979769e-01
 
Photon flux (15-150 keV)    in 47.8 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)  = 1.56e-06
S(50-100 keV) = 2.58e-06

T90 vs. Hardness ratio plot

T90                                   = 61.7239999771118 sec.
Hardness ratio (energy fluence ratio) = 1.65385

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.56579
Count Ratio (50-100 keV) / (15-25 keV) = 1.4023

Mask shadow pattern

IMX = 3.585564300898409E-01, IMY = -5.305764088187091E-02

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

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:

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

Time interval of the image:
-37.547400 10.252640
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
264.6237 -44.3193   11.3  41.2  129.9   0.3432   1.0    9.4	4U 1735-44                    
276.0682 -30.2768    6.2  47.1  152.4  -0.6545  -1.9    9.2	H1820-303                     
285.1301 -24.7392    0.0  47.9  165.6   0.2498   0.8   12.0	HT1900.1-2455                 
122.0331 -65.4158    3.0  51.2   31.7   2.1894   3.8 ------	UNKNOWN                       
176.4752 -83.8875    3.0  33.9   51.3   0.7153   3.8 ------	UNKNOWN                       
 15.6956 -72.7017    0.2  19.9    8.4   8.1926  72.4 ------	UNKNOWN                       
330.8671 -11.9719    2.9  49.7 -133.3   2.1688   4.0 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
55.252600 962.377000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
264.6485 -44.6010    5.2  53.5  157.3   6.7691   2.2    9.9	4U 1735-44                    
 63.4289 -73.4413    2.8  13.6   37.4   2.0784   4.1 ------	UNKNOWN                       
284.2304 -38.3343    3.4  54.1  177.0   7.0620   3.3 ------	UNKNOWN                       
 16.6505 -36.5788    4.1  36.1  -77.1   4.4449   2.8 ------	UNKNOWN

Plot creation:
Fri Apr 15 11:52:26 EDT 2016