batgrbproduct analysis for trigger=554620

batgrbproduct Analysis for Trigger=554620

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): Sun Jan 12 04:04:56 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger554620
======================================================================

  Trigger: 00554620      Segment: 000

  BAT Trigger Time: 388741688   [s; MET]
      Trigger Stop: 388741752   [s; MET]
               UTC: 2013-04-27T07:47:57.511640    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 173.138779355743   Dec: 27.6915539178619  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    23.81
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    23.81

  Flight Position:   [ source = BAT ]
    RA: 173.138779355743   Dec: 27.6915539178619  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 173.149056906524   Dec: 27.7053988484936  [deg; J2000]  
        { 11h 32m 35.8s , +27d 42' 19.4" }
         +/- 0.982137400870556 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.238352452217769 [arcmin] (formal 1-sigma fit error)
    SNR: 31.2105110737043
 
  Angular difference between Flight and Ground position is 0.994062 arcmin
 
  Partial Coding Fraction: 0.140625    [ including projection effects ]

  Duration
     T90: 244.331999957561 +/- 4.73248855584923
        Measured from: -47.0120000243187
                   to: 197.319999933243     [s; relative to TRIGTIME]
     T50: 22.4959999918938 +/- 0.596335433568541
        Measured from: -43.744000017643
                   to: -21.2480000257492     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -43.4240000247955     
                   to: -42.4240000247955     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -51.1520000100136     
                   to: 660.040000021458     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total   109.839288 171.510934 174.416588  64.949497
           0.355854   0.426354   0.438499   0.347329 [error]
 Peak      5.516924  12.745294  18.743381   8.652996
           0.068270   0.103737   0.131189   0.113289 [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 3.44e-05 7.72e-05 1.37e-04 5.68e-04 3.73e-04 8.16e-04   erg/cm2
              Error 9.14e-07 1.27e-06 1.32e-06 1.20e-05 3.67e-06 1.18e-05   erg/cm2
Peak flux Power-law 6.15e+01 9.87e+01 1.20e+02 2.84e+02 3.61e+02 5.64e+02   ph/cm2/s
              Error 1.95e+00 1.94e+00 1.49e+00 7.59e+00 4.98e+00 7.84e+00   ph/cm2/s
 
Fluence   Cutoff-PL 3.43e-05 7.72e-05 1.37e-04 5.65e-04 3.73e-04 8.13e-04   erg/cm2
              Error -------- 1.27e-06 -------- -------- 3.63e-06 --------   erg/cm2
Peak flux Cutoff-PL 5.65e+01 9.82e+01 1.23e+02 2.41e+02 3.59e+02 5.19e+02   ph/cm2/s
              Error 2.82e+00 1.99e+00 2.21e+00 1.78e+01 5.08e+00 1.87e+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    1.176    0.019    -      -           5.13e-02 6.27e-04   19.530 57
CPL   1.170    0.019    10000.0    0.0      5.16e-02 5.62e-04   19.980 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.722    0.023    -      -           3.13e+00 4.55e-02   46.320 57
CPL   0.502    0.099     467.4  213.1      3.77e+00 3.09e-01   31.440 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: 168.832000 sec.
T50 in the 50-300 keV band: 5.440000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  711.192  -51.152  660.040
T90   244.332  -47.012  197.320
T50    22.496  -43.744  -21.248
Peak    1.000  -43.424  -42.424

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
  173.1491    27.7054   0.0062    39.1063   -76.1615        32.9468848     31.211 TRIG_00554620                 
 
Foreground time interval of the image:
-16.099  72.301 (delta_t =  88.400 [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  -51.152 sec. to  660.040 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.17561     ( -0.0185717   0.0184726 )
Norm@50keV  : 5.13108E-02    ( -0.000628703   0.000625252 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          19.53 using 59 PHA bins.
# Reduced chi-squared =         0.3426 for     57 degrees of freedom 
# Null hypothesis probability =   9.999992e-01
 
Photon flux (15-150 keV)    in 711.2 sec: 6.00298 ( -0.0827577  0.0833332 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0.000372828 ( -3.67294e-06  3.67349e-06 ) ergs/cm2

Cutoff power-law model

Time interval is from  -51.152 sec. to  660.040 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.16959     ( -0.0187397   0.0186241 )
Epeak [keV] : 1.00000E+04      ( -10000 -10000 )
Norm@50keV  : 5.15556E-02    ( -0.000627935   0.00049584 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          19.98 using 59 PHA bins.
# Reduced chi-squared =         0.3567 for     56 degrees of freedom 
# Null hypothesis probability =   9.999978e-01
 
Photon flux (15-150 keV)    in 711.2 sec: 5.99818 ( -0.08293  0.08302 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0.000373007 ( -3.59369e-06  3.67335e-06 ) ergs/cm2

Band function

Time interval is from  -51.152 sec. to  660.040 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.843203   ( 0.845148   0.845148 )
beta        : -1.17559    ( -0.0184872   0.0185659 )
Epeak [keV] : 56.9862      ( -55.5385 9944.42 )
Norm@50keV   : 0.103684    ( -0.0537532   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          19.53 using 59 PHA bins.
# Reduced chi-squared =         0.3552 for     55 degrees of freedom 
# Null hypothesis probability =   9.999975e-01
 
Photon flux (15-150 keV)    in 711.2 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]    : 27.5141  (  )
R^2/D10^2   : 9.71769E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =        1971.81 using 59 PHA bins.
# Reduced chi-squared =        34.5931 for     57 degrees of freedom 
# Null hypothesis probability =   0.000000e+00
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.619e-06   2.062e-07
25- 50  5.121e-05   9.317e-07
50-150  2.818e-04   2.880e-06
15-150  3.416e-04   3.343e-06

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 28.9396       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =        2040.21 using 59 PHA bins.
# Reduced chi-squared =        35.7931 for     57 degrees of freedom 
# Null hypothesis probability =   0.000000e+00
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.125e-05   7.148e-07
25- 50  9.859e-05   1.316e-06
50-150  2.162e-04   2.774e-06
15-150  3.661e-04   4.836e-06

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.11528        (-0.400543      0.416878)
R1^2/D10^2  : 2.15645        (-0.307663      0.369151)
kT2 [keV]   : 39.6772        (-1.32791      1.49154)
R2^2/D10^2  : 2.59407E-02    (-0.0029475   0.00309368)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.27 using 59 PHA bins.
# Reduced chi-squared =         0.7504 for     55 degrees of freedom 
# Null hypothesis probability =   9.149370e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.874e-05   1.341e-06
25- 50  7.978e-05   1.707e-06
50-150  2.642e-04   3.414e-06
15-150  3.727e-04   4.836e-06

Peak spectrum fit

Power-law model

Time interval is from  -43.424 sec. to  -42.424 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.722392     ( -0.0230173   0.0228961 )
Norm@50keV  : 3.13131    ( -0.045534   0.0454065 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.32 using 59 PHA bins.
# Reduced chi-squared =         0.8126 for     57 degrees of freedom 
# Null hypothesis probability =   8.431694e-01
 
Photon flux (15-150 keV)    in 1 sec: 361.352 ( -4.97319  4.97744 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.78408e-05 ( -4.814e-07  4.81422e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -43.424 sec. to  -42.424 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.501537     ( -0.100265   0.0982835 )
Epeak [keV] : 467.392      ( -122.351 303.925 )
Norm@50keV  : 3.77096    ( -0.294584   0.324213 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          31.44 using 59 PHA bins.
# Reduced chi-squared =         0.5614 for     56 degrees of freedom 
# Null hypothesis probability =   9.967497e-01
 
Photon flux (15-150 keV)    in 1 sec: 358.629 ( -5.071  5.082 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.79085e-05 ( 0  0 ) ergs/cm2

Band function

Time interval is from  -43.424 sec. to  -42.424 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.933411   ( 0.933411   0.933411 )
beta        : -0.722391    ( -0.0228973   0.0230161 )
Epeak [keV] : 15.5336      ( -15.5336 -15.5336 )
Norm@50keV   : 4.38736    ( -0.918283   6.02676e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.32 using 59 PHA bins.
# Reduced chi-squared =         0.8421 for     55 degrees of freedom 
# Null hypothesis probability =   7.914987e-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]    : 30.1476  (  )
R^2/D10^2   : 5.55852  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         666.87 using 59 PHA bins.
# Reduced chi-squared =         11.699 for     57 degrees of freedom 
# Null hypothesis probability =  7.116230e-105
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.880e-07   2.185e-08
25- 50  4.871e-06   1.145e-07
50-150  3.121e-05   4.700e-07
15-150  3.687e-05   4.900e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 1502.25       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =        3736.92 using 59 PHA bins.
# Reduced chi-squared =        65.5601 for     57 degrees of freedom 
# Null hypothesis probability =   0.000000e+00
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.741e-06   5.000e-08
25- 50  7.196e-06   9.800e-08
50-150  1.578e-05   2.200e-07
15-150  2.672e-05   3.700e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 11.3193        (-0.952042      1.03637)
R1^2/D10^2  : 44.5554        (-8.67716      11.5941)
kT2 [keV]   : 47.2422        (-3.30349      4.41446)
R2^2/D10^2  : 1.33624    (-0.301507   0.318567)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          37.58 using 59 PHA bins.
# Reduced chi-squared =         0.6832 for     55 degrees of freedom 
# Null hypothesis probability =   9.650757e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.539e-06   8.600e-08
25- 50  5.941e-06   1.985e-07
50-150  3.060e-05   8.450e-07
15-150  3.808e-05   1.030e-06

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: 1.87588     ( -0.048289   0.0486095 )
Norm@50keV  : 2.20076E-02    ( -0.000527508   0.000526823 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          34.25 using 59 PHA bins.
# Reduced chi-squared =         0.6009 for     57 degrees of freedom 
# Null hypothesis probability =   9.926869e-01
 
Photon flux (15-150 keV)    in 88.4 sec: 3.12648 ( -0.0887174  0.0892614 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.78846e-05 ( -4.28499e-07  4.2884e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.87493     ( -0.048442   0.0491599 )
Epeak [keV] : 9999.33      (   )
Norm@50keV  : 2.20291E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          34.26 using 59 PHA bins.
# Reduced chi-squared =         0.6118 for     56 degrees of freedom 
# Null hypothesis probability =   9.903046e-01
 
Photon flux (15-150 keV)    in 88.4 sec: 3.12925 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.78839e-05 ( -4.21933e-07  4.21668e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.43594   ( 1.4352   1.4352 )
beta        : -1.87747    ( 1.87747   0.0494416 )
Epeak [keV] : 28.1451      ( -28.1042 -28.1042 )
Norm@50keV   : 4.91584E-02    ( -0.0273984   5.26865e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          34.21 using 59 PHA bins.
# Reduced chi-squared =         0.6219 for     55 degrees of freedom 
# Null hypothesis probability =   9.875295e-01
 
Photon flux (15-150 keV)    in 88.4 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)  = 7.72e-05
S(50-100 keV) = 1.37e-04

T90 vs. Hardness ratio plot

T90                                   = 244.331999957561 sec.
Hardness ratio (energy fluence ratio) = 1.77461

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.56147
Count Ratio (50-100 keV) / (15-25 keV) = 1.58793

Mask shadow pattern

IMX = 1.944245717662905E-01, IMY = 7.892653722908463E-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:
-16.099400 72.300590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
186.6075 -47.4850    2.6  42.2  141.3   1.5836   4.5 ------	UNKNOWN                       
180.4541  28.1589    2.9  36.4  -66.6   2.4061   3.9 ------	UNKNOWN                       
173.1490  27.7054    0.4  39.1  -76.2  32.9485  31.2 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
129.700590 963.038700
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
159.3902 -20.9407    3.2  50.4  156.5  11.9243   3.6 ------	UNKNOWN                       
188.5873   7.3515    2.9  25.0  101.2   4.0808   3.9 ------	UNKNOWN                       
155.9230   4.6659    2.2  28.3  178.4   4.0306   5.1 ------	UNKNOWN                       
173.1421  27.7220    0.1   0.0  -62.7  63.2324  94.1 ------	UNKNOWN                       
206.4331  52.5345    2.7  35.0   -4.6   3.9540   4.3 ------	UNKNOWN                       
232.9163  74.8166    2.6  55.6  -24.3  11.9473   4.4 ------	UNKNOWN                       
122.6115  12.4624    3.5  49.5 -137.6   9.3375   3.3 ------	UNKNOWN                       
120.6475  12.9243    3.7  51.0 -135.9  12.0475   3.1 ------	UNKNOWN

Plot creation:
Sat May 30 17:03:44 EDT 2015