batgrbproduct analysis for trigger=240766

batgrbproduct Analysis for Trigger=240766

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): Wed Jun 24 01:28:37 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger240766
======================================================================

  Trigger: 00240766      Segment: 000

  BAT Trigger Time: 186223678.016   [s; MET]
      Trigger Stop: 186223679.04   [s; MET]
               UTC: 2006-11-26T08:47:56.420860    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 86.6247167166277   Dec: 64.1900414481625  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.76
     Image Trigger?:     NO
     Rate S/N Ratio:     24.6170672501823  [ if not an image trigger ]
     Image S/N Ratio:    8.76

  Flight Position:   [ source = BAT ]
    RA: 86.6247167166277   Dec: 64.1900414481625  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 86.6170343148871   Dec: 64.2052348257638  [deg; J2000]  
        { 05h 46m 28.1s , +64d 12' 18.8" }
         +/- 0.701287795139724 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.172785523399791 [arcmin] (formal 1-sigma fit error)
    SNR: 50.4971130999758
 
  Angular difference between Flight and Ground position is 0.933420 arcmin
 
  Partial Coding Fraction: 0.4921875    [ including projection effects ]

  Duration
     T90: 52.6240000128746 +/- 10.7603732051911
        Measured from: -0.967999994754791
                   to: 51.6560000181198     [s; relative to TRIGTIME]
     T50: 14.8560000061989 +/- 0.451220573564801
        Measured from: 6
                   to: 20.8560000061989     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 6.66400000452995     
                   to: 7.66400000452995     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -5.20800000429153     
                   to: 90.2159999907017     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.075817   3.142490   3.173302   1.054855
           0.070256   0.074947   0.069718   0.059509 [error]
 Peak      0.191699   0.388346   0.476143   0.200387
           0.010648   0.013647   0.014977   0.013114 [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 6.57e-07 1.42e-06 2.43e-06 9.51e-06 6.65e-06 1.40e-05   erg/cm2
              Error 3.79e-08 4.75e-08 7.11e-08 6.69e-07 1.81e-07 6.94e-07   erg/cm2
Peak flux Power-law 1.95e+00 2.83e+00 3.07e+00 6.20e+00 9.76e+00 1.41e+01   ph/cm2/s
              Error 1.55e-01 1.35e-01 1.20e-01 5.41e-01 3.63e-01 5.95e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.45e-07 1.43e-06 2.44e-06 8.81e-06 6.64e-06 1.33e-05   erg/cm2
              Error 4.73e-08 4.89e-08 8.25e-08 1.53e-06 1.92e-07 1.36e-06   erg/cm2
Peak flux Cutoff-PL 1.88e+00 2.85e+00 3.12e+00 5.48e+00 9.71e+00 1.33e+01   ph/cm2/s
              Error 1.51e-01 1.40e-01 1.52e-01 9.05e-01 3.75e-01 1.00e+00   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    1.231    0.050    -      -           6.93e-03 1.84e-04   49.900 57
CPL   1.167    0.130     725.4    0.0      7.38e-03 1.09e-03   49.990 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.885    0.066    -      -           8.50e-02 3.16e-03   83.700 57
CPL   0.764    0.204     609.6    0.0      9.59e-02 1.72e-02   83.010 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: 23.616000 sec.
T50 in the 50-300 keV band: 7.808000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   95.424   -5.208   90.216
T90    52.624   -0.968   51.656
T50    14.856    6.000   20.856
Peak    1.000    6.664    7.664

Click here for the BAT GCN circular template

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
   86.6170    64.2052   0.0038    36.1747    18.9473        10.0093052     50.497 TRIG_00240766                 
 
Foreground time interval of the image:
 -5.208  90.216 (delta_t =  95.424 [sec])
Background time interval of the image:
-239.016  -5.208 (delta_t = 233.808 [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

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

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 1.024000

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 1.024000

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   -5.208 sec. to   90.216 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.23095     ( -0.0498784   0.0496593 )
Norm@50keV  : 6.93195E-03    ( -0.000183921   0.000183594 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.90 using 59 PHA bins.
# Reduced chi-squared =         0.8754 for     57 degrees of freedom 
# Null hypothesis probability =   7.362471e-01
 
Photon flux (15-150 keV)    in 95.42 sec: 0.817399 ( -0.0236846  0.0237751 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.65347e-06 ( -1.81186e-07  1.81435e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -5.208 sec. to   90.216 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.16719     ( -0.187431   0.073004 )
Epeak [keV] : 725.375      ( -953.594 -953.594 )
Norm@50keV  : 7.37867E-03    ( -0.000797095   0.00138457 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.99 using 59 PHA bins.
# Reduced chi-squared =         0.8927 for     56 degrees of freedom 
# Null hypothesis probability =   7.004054e-01
 
Photon flux (15-150 keV)    in 95.42 sec: 0.817468 ( -0.024041  0.023177 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.63815e-06 ( -1.85935e-07  1.97319e-07 ) ergs/cm2

Band function

Time interval is from   -5.208 sec. to   90.216 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.617705   ( 0.839607   5.83421 )
beta        : -1.23534    ( 1.23371   0.0512352 )
Epeak [keV] : 54.8323      ( -54.073 411.37 )
Norm@50keV   : 2.00074E-02    ( -0.0202809   420616 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.72 using 59 PHA bins.
# Reduced chi-squared =         0.9039 for     55 degrees of freedom 
# Null hypothesis probability =   6.760401e-01
 
Photon flux (15-150 keV)    in 95.42 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]    : 20.7805  (  )
R^2/D10^2   : 3.20668E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         327.15 using 59 PHA bins.
# Reduced chi-squared =         5.7395 for     57 degrees of freedom 
# Null hypothesis probability =   1.437704e-39
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.508e-07   1.341e-08
25- 50  1.280e-06   5.105e-08
50-150  4.117e-06   1.641e-07
15-150  5.648e-06   1.760e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 3.50739       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         194.25 using 59 PHA bins.
# Reduced chi-squared =         3.4078 for     57 degrees of freedom 
# Null hypothesis probability =   7.159286e-17
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.334e-07   2.486e-08
25- 50  1.603e-06   4.771e-08
50-150  3.516e-06   9.924e-08
15-150  5.952e-06   1.713e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.66660        (-0.919405      1.05433)
R1^2/D10^2  : 0.512006        (-0.175838      0.289533)
kT2 [keV]   : 32.1569        (-2.94239      4.074)
R2^2/D10^2  : 6.65578E-03    (-0.00216022   0.00255052)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.44 using 59 PHA bins.
# Reduced chi-squared =          1.117 for     55 degrees of freedom 
# Null hypothesis probability =   2.563292e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.005e-07   5.802e-08
25- 50  1.439e-06   9.065e-08
50-150  4.604e-06   2.948e-07
15-150  6.643e-06   3.831e-07

Peak spectrum fit

Power-law model

Time interval is from    6.664 sec. to    7.664 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.885226     ( -0.0663688   0.065759 )
Norm@50keV  : 8.50477E-02    ( -0.00316903   0.00315804 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          83.70 using 59 PHA bins.
# Reduced chi-squared =          1.468 for     57 degrees of freedom 
# Null hypothesis probability =   1.216634e-02
 
Photon flux (15-150 keV)    in 1 sec: 9.76080 ( -0.362955  0.363174 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.59991e-07 ( -3.84177e-08  3.84961e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    6.664 sec. to    7.664 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.763882     ( -0.259883   0.14837 )
Epeak [keV] : 609.596      ( -609.596 -609.596 )
Norm@50keV  : 9.58656E-02    ( -0.0073795   0.0270388 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          83.01 using 59 PHA bins.
# Reduced chi-squared =          1.482 for     56 degrees of freedom 
# Null hypothesis probability =   1.102156e-02
 
Photon flux (15-150 keV)    in 1 sec: 9.71381 ( -0.37451  0.37469 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.56041e-07 ( -3.9858e-08  3.9678e-08 ) ergs/cm2

Band function

Time interval is from    6.664 sec. to    7.664 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -9.99991   ( 9.99991   9.99991 )
beta        : -0.885226    ( -0.065759   0.0663688 )
Epeak [keV] : 15.8942      ( -15.8942 -15.8942 )
Norm@50keV   : 11.5592    ( -0.430716   0.429222 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          83.70 using 59 PHA bins.
# Reduced chi-squared =          1.522 for     55 degrees of freedom 
# Null hypothesis probability =   7.569305e-03
 
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]    : 24.3082  (  )
R^2/D10^2   : 0.263480  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         199.88 using 59 PHA bins.
# Reduced chi-squared =         3.5067 for     57 degrees of freedom 
# Null hypothesis probability =   9.284475e-18
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.744e-08   2.085e-09
25- 50  1.535e-07   9.250e-09
50-150  6.747e-07   3.595e-08
15-150  8.556e-07   4.060e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 38.6590       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         352.67 using 59 PHA bins.
# Reduced chi-squared =         6.1871 for     57 degrees of freedom 
# Null hypothesis probability =   3.222468e-44
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.626e-08   3.975e-09
25- 50  1.852e-07   8.050e-09
50-150  4.061e-07   1.705e-08
15-150  6.876e-07   2.865e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.34153        (-1.45464      1.66643)
R1^2/D10^2  : 2.59215        (-0.940449      1.67661)
kT2 [keV]   : 41.1030        (-5.91912      9.89328)
R2^2/D10^2  : 4.80867E-02    (-0.0218538   0.0286395)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          81.12 using 59 PHA bins.
# Reduced chi-squared =          1.475 for     55 degrees of freedom 
# Null hypothesis probability =   1.254084e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.512e-08   8.575e-09
25- 50  1.716e-07   2.035e-08
50-150  7.413e-07   1.267e-07
15-150  9.680e-07   1.291e-07

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: 1.23095     ( -0.0498784   0.0496593 )
Norm@50keV  : 6.93195E-03    ( -0.000183921   0.000183594 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.90 using 59 PHA bins.
# Reduced chi-squared =         0.8754 for     57 degrees of freedom 
# Null hypothesis probability =   7.362471e-01
 
Photon flux (15-150 keV)    in 95.42 sec: 0.817399 ( -0.0236846  0.0237751 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.65347e-06 ( -1.81186e-07  1.81435e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.16719     ( -0.187431   0.073004 )
Epeak [keV] : 725.375      ( -953.594 -953.594 )
Norm@50keV  : 7.37867E-03    ( -0.000797095   0.00138457 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.99 using 59 PHA bins.
# Reduced chi-squared =         0.8927 for     56 degrees of freedom 
# Null hypothesis probability =   7.004054e-01
 
Photon flux (15-150 keV)    in 95.42 sec: 0.817468 ( -0.024041  0.023177 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.63815e-06 ( -1.85935e-07  1.97319e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.617705   ( 0.839607   5.8343 )
beta        : -1.23534    ( 1.23371   0.0512352 )
Epeak [keV] : 54.8323      ( -54.073 411.37 )
Norm@50keV   : 2.00074E-02    ( -0.0202809   420617 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.72 using 59 PHA bins.
# Reduced chi-squared =         0.9039 for     55 degrees of freedom 
# Null hypothesis probability =   6.760401e-01
 
Photon flux (15-150 keV)    in 95.42 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)  = 1.42e-06
S(50-100 keV) = 2.43e-06

T90 vs. Hardness ratio plot

T90                                   = 52.6240000128746 sec.
Hardness ratio (energy fluence ratio) = 1.71127

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.51386
Count Ratio (50-100 keV) / (15-25 keV) = 1.5287

Mask shadow pattern

IMX = 6.915929901568856E-01, IMY = -2.374231425521771E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

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:
-239.016000 -5.208000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
308.0607  40.9364    2.8  39.4 -119.5   1.4454   4.1    2.4	Cyg X-3                       
326.1088  38.3519    7.6  32.4 -140.6   0.2871   1.5    3.5	Cyg X-2                       
 16.1722  11.3184    2.4  48.7  137.7   3.2541   4.7 ------	UNKNOWN                       
 52.3964  39.9324    2.4  35.1   74.2   1.6498   4.8 ------	UNKNOWN                       
 19.1434  30.7440    2.6  30.1  127.7   1.0365   4.4 ------	UNKNOWN                       
 12.2996  44.0947    3.1  15.8  133.0   0.5591   3.7 ------	UNKNOWN                       
330.1431   9.6867    2.8  56.2 -164.9   2.4222   4.1 ------	UNKNOWN                       
293.3266  48.8490    3.7  41.2  -99.5   2.5389   3.1 ------	UNKNOWN

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

Time interval of the image:
-5.208000 90.216000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
308.0801  41.0504    7.1  39.3 -119.4   0.4535   1.6    6.0	Cyg X-3                       
326.1883  38.2450   13.2  32.4 -140.8  -0.1355  -0.9    4.7	Cyg X-2                       
 86.6170  64.2052    0.2  36.2   18.9  10.0096  50.5 ------	UNKNOWN                       
244.0166  67.6188    2.3  46.0  -54.8   2.3551   5.0 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:

Plot creation:
Wed Jun 24 01:49:37 EDT 2015