batgrbproduct analysis for trigger=634200

batgrbproduct Analysis for Trigger=634200

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 Apr  6 02:52:18 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger634200
======================================================================

  Trigger: 00634200      Segment: 000

  BAT Trigger Time: 447635000   [s; MET]
      Trigger Stop: 447635064   [s; MET]
               UTC: 2015-03-09T23:03:06.711860    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 276.987461493266   Dec: 86.4295417431885  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    13
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    13

  Flight Position:   [ source = BAT ]
    RA: 276.987461493266   Dec: 86.4295417431885  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 277.035068605504   Dec: 86.4162161973437  [deg; J2000]  
        { 18h 28m 08.4s , +86d 24' 58.4" }
         +/- 1.85618360051024 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.763158473122185 [arcmin] (formal 1-sigma fit error)
    SNR: 12.5711263772369
 
  Angular difference between Flight and Ground position is 0.819155 arcmin
 
  Partial Coding Fraction: 0.5078125    [ including projection effects ]

  Duration
     T90: 242.039999961853 +/- 5.99635618772369
        Measured from: -191.824000000954
                   to: 50.2159999608994     [s; relative to TRIGTIME]
     T50: 24.3919999599457 +/- 2.81560225689203
        Measured from: -182.027999997139
                   to: -157.636000037193     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -177.487999975681     
                   to: -176.487999975681     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -197.319999992847     
                   to: 119.072000026703     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     6.077417   9.711227   8.258834   2.060654
           0.130346   0.138981   0.125832   0.114002 [error]
 Peak      0.198936   0.399553   0.398581   0.131350
           0.010612   0.013224   0.013757   0.010143 [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 2.13e-06 4.17e-06 6.33e-06 2.09e-05 1.78e-05 3.35e-05   erg/cm2
              Error 8.92e-08 1.01e-07 1.41e-07 1.10e-06 3.55e-07 1.15e-06   erg/cm2
Peak flux Power-law 2.20e+00 2.87e+00 2.74e+00 4.63e+00 9.35e+00 1.24e+01   ph/cm2/s
              Error 1.63e-01 1.29e-01 1.11e-01 4.04e-01 3.51e-01 4.95e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.94e-06 4.23e-06 6.54e-06 1.37e-05 1.74e-05 2.64e-05   erg/cm2
              Error 1.19e-07 1.07e-07 1.68e-07 2.43e-06 3.91e-07 2.43e-06   erg/cm2
Peak flux Cutoff-PL 2.04e+00 2.92e+00 2.84e+00 3.42e+00 9.24e+00 1.12e+01   ph/cm2/s
              Error 2.04e-01 1.39e-01 1.39e-01 8.48e-01 3.61e-01 9.15e-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    1.398    0.037    -      -           5.81e-03 1.14e-04   53.420 57
CPL   1.047    0.157     156.3   53.0      8.26e-03 1.28e-03   37.850 56
 
The chi2 of BB fit is -------- which shows a significant improvement in the fit over a PL.
Check the BB fit.
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.067    0.064    -      -           8.08e-02 2.96e-03   51.190 57
CPL   0.764    0.255     233.0  367.7      1.11e-01 2.89e-02   46.730 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: 47.808000 sec.
T50 in the 50-300 keV band: 10.816000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  316.392 -197.320  119.072
T90   242.040 -191.824   50.216
T50    24.392 -182.028 -157.636
Peak    1.000 -177.488 -176.488

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
  277.0351    86.4162   0.0153    25.9260    68.0069         2.6537059     12.571 TRIG_00634200                 
 
Foreground time interval of the image:
-96.899  73.901 (delta_t = 170.800 [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 64.000000

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 64.000000

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 64.000000

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 -197.320 sec. to  119.072 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.39799     ( -0.0369264   0.0368498 )
Norm@50keV  : 5.80646E-03    ( -0.000113539   0.0001135 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.42 using 59 PHA bins.
# Reduced chi-squared =         0.9372 for     57 degrees of freedom 
# Null hypothesis probability =   6.101241e-01
 
Photon flux (15-150 keV)    in 316.4 sec: 0.706796 ( -0.0157012  0.0157504 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.77592e-05 ( -3.5514e-07  3.55343e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from -197.320 sec. to  119.072 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.04668     ( -0.160069   0.154688 )
Epeak [keV] : 156.262      ( -31.216 74.7154 )
Norm@50keV  : 8.25609E-03    ( -0.00115828   0.00139512 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          37.85 using 59 PHA bins.
# Reduced chi-squared =         0.6758 for     56 degrees of freedom 
# Null hypothesis probability =   9.700394e-01
 
Photon flux (15-150 keV)    in 316.4 sec: 0.687398 ( -0.017501  0.017592 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.74007e-05 ( -3.92304e-07  3.90596e-07 ) ergs/cm2

Band function

Time interval is from -197.320 sec. to  119.072 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.702701   ( -0.470575   1.01681 )
beta        : -1.53842    ( 1.53772   0.0871753 )
Epeak [keV] : 86.3985      ( -38.0937 123.872 )
Norm@50keV   : 1.30413E-02    ( -0.00593817   0.0486212 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          36.93 using 59 PHA bins.
# Reduced chi-squared =         0.6714 for     55 degrees of freedom 
# Null hypothesis probability =   9.708602e-01
 
Photon flux (15-150 keV)    in 316.4 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]    : 18.4363  (  )
R^2/D10^2   : 3.91752E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         449.34 using 59 PHA bins.
# Reduced chi-squared =         7.8832 for     57 degrees of freedom 
# Null hypothesis probability =   2.462550e-62
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.369e-07   3.496e-08
25- 50  3.939e-06   1.171e-07
50-150  9.777e-06   3.022e-07
15-150  1.455e-05   3.259e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 2.98109       (-0.0580505     0.0580121)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         113.20 using 59 PHA bins.
# Reduced chi-squared =         1.9860 for     57 degrees of freedom 
# Null hypothesis probability =   1.377199e-05
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.349e-06   5.141e-08
25- 50  4.519e-06   1.028e-07
50-150  9.912e-06   2.167e-07
15-150  1.678e-05   3.639e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.44862        (-0.715536      0.758723)
R1^2/D10^2  : 0.334498        (-0.0781874      0.110551)
kT2 [keV]   : 30.0092        (-2.32633      3.00129)
R2^2/D10^2  : 5.94677E-03    (-0.00171084   0.00203934)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.28 using 59 PHA bins.
# Reduced chi-squared =         0.7687 for     55 degrees of freedom 
# Null hypothesis probability =   8.956028e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.683e-06   1.307e-07
25- 50  4.358e-06   1.645e-07
50-150  1.125e-05   5.727e-07
15-150  1.729e-05   7.356e-07

Peak spectrum fit

Power-law model

Time interval is from -177.488 sec. to -176.488 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.06726     ( -0.0637116   0.0633837 )
Norm@50keV  : 8.08216E-02    ( -0.00296425   0.00296293 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.19 using 59 PHA bins.
# Reduced chi-squared =         0.8981 for     57 degrees of freedom 
# Null hypothesis probability =   6.917653e-01
 
Photon flux (15-150 keV)    in 1 sec: 9.34730 ( -0.351275  0.351546 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.54048e-07 ( -3.43211e-08  3.43941e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from -177.488 sec. to -176.488 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.763579     ( -0.261848   0.247162 )
Epeak [keV] : 233.004      ( -81.631 653.852 )
Norm@50keV  : 0.110688    ( -0.0244402   0.0332766 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.73 using 59 PHA bins.
# Reduced chi-squared =         0.8345 for     56 degrees of freedom 
# Null hypothesis probability =   8.065745e-01
 
Photon flux (15-150 keV)    in 1 sec: 9.23861 ( -0.36133  0.36155 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.43315e-07 ( -3.6085e-08  3.5925e-08 ) ergs/cm2

Band function

Time interval is from -177.488 sec. to -176.488 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.99990   ( -5.95668e-05   -4.9999 )
beta        : -1.12035    ( -0.0709891   0.0703373 )
Epeak [keV] : 28.1032      ( -6.8048 3.84677 )
Norm@50keV   : 2901.51    ( -105.662   12075 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.26 using 59 PHA bins.
# Reduced chi-squared =         0.8593 for     55 degrees of freedom 
# Null hypothesis probability =   7.614568e-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]    : 20.9318  (  )
R^2/D10^2   : 0.387980  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         167.47 using 59 PHA bins.
# Reduced chi-squared =         2.9381 for     57 degrees of freedom 
# Null hypothesis probability =   8.412006e-13
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.216e-08   2.210e-09
25- 50  1.650e-07   9.300e-09
50-150  5.386e-07   3.200e-08
15-150  7.357e-07   3.405e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 38.1893       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         204.20 using 59 PHA bins.
# Reduced chi-squared =         3.5824 for     57 degrees of freedom 
# Null hypothesis probability =   1.917573e-18
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.510e-08   4.010e-09
25- 50  1.829e-07   7.250e-09
50-150  4.012e-07   1.640e-08
15-150  6.792e-07   2.700e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.65710        (-1.39872      1.51731)
R1^2/D10^2  : 2.60551        (-0.847635      1.45765)
kT2 [keV]   : 38.1716        (-5.887      9.94571)
R2^2/D10^2  : 4.75627E-02    (-0.0237869   0.0343141)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.58 using 59 PHA bins.
# Reduced chi-squared =         0.7923 for     55 degrees of freedom 
# Null hypothesis probability =   8.666032e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.810e-08   8.120e-09
25- 50  1.777e-07   1.930e-08
50-150  6.147e-07   1.243e-07
15-150  8.505e-07   1.279e-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: 2.03857     ( -0.201288   0.215348 )
Norm@50keV  : 9.34564E-04    ( -0.000131802   0.000128488 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.24 using 59 PHA bins.
# Reduced chi-squared =         0.8639 for     57 degrees of freedom 
# Null hypothesis probability =   7.578056e-01
 
Photon flux (15-150 keV)    in 170.8 sec: 0.142730 ( -0.0149751  0.0149779 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.47551e-06 ( -1.89349e-07  1.94309e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.34166     ( -0.928765   0.777476 )
Epeak [keV] : 40.5908      (   )
Norm@50keV  : 2.31067E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.92 using 59 PHA bins.
# Reduced chi-squared =         0.8378 for     56 degrees of freedom 
# Null hypothesis probability =   8.011357e-01
 
Photon flux (15-150 keV)    in 170.8 sec: 0.138656 ( -0.015542  0.015582 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.38942e-06 ( -1.98992e-07  2.12514e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.35434   ( -4.40096   0.882518 )
beta        : -10.0000    ( 10   1.06581e-14 )
Epeak [keV] : 40.7175      ( -31.0106 -40.7163 )
Norm@50keV   : 2.26734E-03    ( -0.00116388   0.00539325 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.92 using 59 PHA bins.
# Reduced chi-squared =         0.8531 for     55 degrees of freedom 
# Null hypothesis probability =   7.726136e-01
 
Photon flux (15-150 keV)    in 170.8 sec: 0.141111 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.38697e-06 ( -1.38578e-06  -1.96581e-07 ) ergs/cm2

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

S(25-50 keV)  = 4.17e-06
S(50-100 keV) = 6.33e-06

T90 vs. Hardness ratio plot

T90                                   = 242.039999961853 sec.
Hardness ratio (energy fluence ratio) = 1.51799

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.59792
Count Ratio (50-100 keV) / (15-25 keV) = 1.35894

Mask shadow pattern

IMX = 1.820551608593698E-01, IMY = -4.507577601104357E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

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:
-96.899400 73.900600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.6237  35.2030    2.4  48.7  -16.9   1.6526   4.9    1.6	Cyg X-1                       
308.1036  40.9873    1.8  40.2  -20.3   1.3995   6.2    2.1	Cyg X-3                       
326.1276  38.3344    7.1  35.0  -41.8   0.3798   1.6    2.2	Cyg X-2                       
277.0350  86.4162    0.9  25.9   68.0   2.6538  12.6 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
120.900600 963.072800
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3391  35.3488    7.5  51.4    6.6   1.8829   1.5    5.8	Her X-1                       
299.6228  35.1992    2.6  51.5  -40.8  11.3402   4.4    1.6	Cyg X-1                       
308.0773  40.9461    3.2  46.0  -49.9   6.7173   3.6    1.5	Cyg X-3                       
231.9584  35.2775    3.5  52.2   29.9   8.8648   3.3 ------	UNKNOWN                       
 95.5753  41.4878    2.7  52.1  164.2   8.5977   4.3 ------	UNKNOWN                       
279.5524  40.9076    2.4  45.5  -19.8   4.1214   4.9 ------	UNKNOWN                       
323.4101  65.0921    2.6  22.6  -69.7   2.5915   4.5 ------	UNKNOWN                       
 45.3378  45.1088    3.3  47.2 -148.1   3.9338   3.5 ------	UNKNOWN                       
321.3380  43.7345    3.3  43.7  -64.0   9.3904   3.5 ------	UNKNOWN

Plot creation:
Thu May 28 13:11:15 EDT 2015