batgrbproduct analysis for trigger=505646

batgrbproduct Analysis for Trigger=505646

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 Jan 13 19:54:10 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger505646
======================================================================

  Trigger: 00505646      Segment: 000

  BAT Trigger Time: 340483032   [s; MET]
      Trigger Stop: 340483136   [s; MET]
               UTC: 2011-10-16T18:37:04.526260    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 153.806002279747   Dec: 27.4756888348294  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.49
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.49

  Flight Position:   [ source = BAT ]
    RA: 153.806002279747   Dec: 27.4756888348294  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 153.83095171451   Dec: 27.4721872524119  [deg; J2000]  
        { 10h 15m 19.4s , +27d 28' 19.9" }
         +/- 2.14356334333729 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.798548999640606 [arcmin] (formal 1-sigma fit error)
    SNR: 10.2344967380459
 
  Angular difference between Flight and Ground position is 1.344654 arcmin
 
  Partial Coding Fraction: 0.640625    [ including projection effects ]

  Duration
     T90: 548.995999932289 +/- 107.373835482129
        Measured from: 46.5080000162125
                   to: 595.503999948502     [s; relative to TRIGTIME]
     T50: 106.419999957085 +/- 18.8295125644743
        Measured from: 118.407999992371
                   to: 224.827999949455     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 115.227999985218     
                   to: 116.227999985218     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 35.444000005722     
                   to: 618.579999983311     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.808913   2.627221   1.626453   0.595114
           0.130893   0.136005   0.122629   0.112626 [error]
 Peak      0.031467   0.031904   0.038284   0.008484
           0.006906   0.007401   0.006592   0.005733 [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 7.97e-07 1.14e-06 1.22e-06 2.40e-06 3.90e-06 5.55e-06   erg/cm2
              Error 7.51e-08 6.63e-08 1.21e-07 4.97e-07 2.69e-07 6.06e-07   erg/cm2
Peak flux Power-law 2.96e-01 2.98e-01 2.11e-01 2.38e-01 8.99e-01 1.04e+00   ph/cm2/s
              Error 9.63e-02 6.09e-02 5.34e-02 1.23e-01 1.76e-01 2.07e-01   ph/cm2/s
 
Fluence   Cutoff-PL 7.95e-07 1.14e-06 1.22e-06 2.20e-06 3.89e-06 5.35e-06   erg/cm2
              Error 7.48e-08 6.66e-08 1.21e-07 7.46e-07 2.69e-07 8.43e-07   erg/cm2
Peak flux Cutoff-PL 2.68e-01 3.10e-01 2.23e-01 1.51e-01 8.83e-01 9.52e-01   ph/cm2/s
              Error 1.20e-01 7.05e-02 6.25e-02 1.56e-01 1.82e-01 2.53e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band 2.65e-01 3.11e-01 2.24e-01 1.45e-01 8.80e-01 9.45e-01   ph/cm2/s
              Error -------- -------- -------- 1.40e-01 -------- --------   ph/cm2/s

 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.909    0.120    -      -           7.28e-04 5.09e-05   43.500 57
CPL   2.031    0.000      14.8    0.0      6.23e-04 0.00e+00   42.860 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.497    0.339    -      -           7.21e-03 1.45e-03   47.880 57
CPL   1.028    1.515     110.0    0.0      1.22e-02 0.00e+00   47.490 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: 203.520000 sec.
T50 in the 50-300 keV band: 81.664000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  583.136   35.444  618.580
T90   548.996   46.508  595.504
T50   106.420  118.408  224.828
Peak    1.000  115.228  116.228

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
  153.8310    27.4722   0.0188    32.1492    15.4431         1.3166812     10.234 TRIG_00505646                 
 
Foreground time interval of the image:
 35.444 112.301 (delta_t =  76.857 [sec])
Background time interval of the image:
-656.599 -640.504 (delta_t =  16.095 [sec])
-239.000  35.444 (delta_t = 274.444 [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)

The mask-weighted light curves based on cleaned DPHs

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   35.444 sec. to  618.580 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.90940     ( -0.118481   0.121234 )
Norm@50keV  : 7.27698E-04    ( -5.12663e-05   5.05068e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.50 using 59 PHA bins.
# Reduced chi-squared =         0.7632 for     57 degrees of freedom 
# Null hypothesis probability =   9.060429e-01
 
Photon flux (15-150 keV)    in 583.1 sec: 0.104851 ( -0.00621083  0.0062213 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.90145e-06 ( -2.67743e-07  2.71048e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   35.444 sec. to  618.580 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.03150     (     )
Epeak [keV] : 14.8476      (   )
Norm@50keV  : 6.23135E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.86 using 59 PHA bins.
# Reduced chi-squared =         0.7654 for     56 degrees of freedom 
# Null hypothesis probability =   9.015292e-01
 
Photon flux (15-150 keV)    in 583.1 sec: 0.104806 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.8891e-06 ( -2.592e-07  2.77987e-07 ) ergs/cm2

Band function

Time interval is from   35.444 sec. to  618.580 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.97759   ( -4.97759   -4.97759 )
beta        : -1.93067    ( -0.128972   0.123663 )
Epeak [keV] : 18.6176      ( -18.6176 3.66302 )
Norm@50keV   : 717.544    ( -41.6064   761176 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.05 using 59 PHA bins.
# Reduced chi-squared =         0.7827 for     55 degrees of freedom 
# Null hypothesis probability =   8.789478e-01
 
Photon flux (15-150 keV)    in 583.1 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]    : 10.6784  (  )
R^2/D10^2   : 3.58322E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         133.65 using 59 PHA bins.
# Reduced chi-squared =         2.3448 for     57 degrees of freedom 
# Null hypothesis probability =   4.248126e-08
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.946e-07   5.507e-08
25- 50  1.345e-06   8.834e-08
50-150  8.465e-07   1.405e-07
15-150  2.686e-06   2.032e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 84.9480       (-17.5157      25.6466)
Norm        : 0.472987       (-0.0440391     0.0516405)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.94 using 59 PHA bins.
# Reduced chi-squared =         0.9112 for     57 degrees of freedom 
# Null hypothesis probability =   6.649320e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.180e-07   7.201e-08
25- 50  1.199e-06   7.085e-08
50-150  1.760e-06   5.656e-07
15-150  3.677e-06   5.962e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.54423        (-0.930058      1.08887)
R1^2/D10^2  : 0.337280        (-0.164105      0.370852)
kT2 [keV]   : 22.7700        (-4.48337      7.76759)
R2^2/D10^2  : 1.67986E-03    (-0.00106186   0.00211688)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.99 using 59 PHA bins.
# Reduced chi-squared =         0.8726 for     55 degrees of freedom 
# Null hypothesis probability =   7.371638e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.031e-07   1.321e-07
25- 50  1.093e-06   1.936e-07
50-150  1.972e-06   5.184e-07
15-150  3.867e-06   7.537e-07

Peak spectrum fit

Power-law model

Time interval is from  115.228 sec. to  116.228 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.49703     ( -0.332414   0.346407 )
Norm@50keV  : 7.20667E-03    ( -0.00145783   0.00143573 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.88 using 59 PHA bins.
# Reduced chi-squared =         0.8400 for     57 degrees of freedom 
# Null hypothesis probability =   7.998111e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.898958 ( -0.175715  0.176058 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.83997e-08 ( -1.50191e-08  1.52629e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from  115.228 sec. to  116.228 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.02786     ( -1.6546   1.37524 )
Epeak [keV] : 109.968      ( -109.976 -109.976 )
Norm@50keV  : 1.21651E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.49 using 59 PHA bins.
# Reduced chi-squared =         0.8481 for     56 degrees of freedom 
# Null hypothesis probability =   7.836524e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.882703 ( -0.183093  0.181227 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.70188e-08 ( -1.53346e-08  1.57494e-08 ) ergs/cm2

Band function

Time interval is from  115.228 sec. to  116.228 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.931850   ( -1.5124   1.54843 )
beta        : -9.36499    ( 9.37127   19.3713 )
Epeak [keV] : 100.206      ( -43.7745 -100.417 )
Norm@50keV   : 1.35254E-02    ( -0.00763048   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.51 using 59 PHA bins.
# Reduced chi-squared =         0.8638 for     55 degrees of freedom 
# Null hypothesis probability =   7.534020e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.880302 (    ) 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]    : 16.8896  (-3.44763  4.47409)
R^2/D10^2   : 6.97073E-02  (-0.0388913   0.0832243)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.26 using 59 PHA bins.
# Reduced chi-squared =         0.9168 for     57 degrees of freedom 
# Null hypothesis probability =   6.532327e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.057e-09   1.674e-09
25- 50  1.786e-08   6.238e-09
50-150  3.629e-08   1.481e-08
15-150  5.820e-08   1.878e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.350       (-103.82      -199.36)
Norm        : 3.69026       (-0.709841     0.7106)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.73 using 59 PHA bins.
# Reduced chi-squared =         0.8373 for     57 degrees of freedom 
# Null hypothesis probability =   8.042933e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.189e-09   5.305e-09
25- 50  1.768e-08   1.005e-08
50-150  3.877e-08   2.221e-08
15-150  6.563e-08   3.812e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.35493        (-1.77762      2.97134)
R1^2/D10^2  : 18.9233        (-17.9612      3293.29)
kT2 [keV]   : 20.2146        (-4.62238      7.42525)
R2^2/D10^2  : 3.44321E-02    (-0.0230056   0.0530922)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.34 using 59 PHA bins.
# Reduced chi-squared =         0.8061 for     55 degrees of freedom 
# Null hypothesis probability =   8.476692e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.559e-09   4.941e-09
25- 50  1.500e-08   8.340e-09
50-150  4.111e-08   2.402e-08
15-150  6.567e-08   3.505e-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: 2.02914     ( -0.266774   0.292246 )
Norm@50keV  : 1.04619E-03    ( -0.000190089   0.000180424 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          37.40 using 59 PHA bins.
# Reduced chi-squared =         0.6562 for     57 degrees of freedom 
# Null hypothesis probability =   9.791764e-01
 
Photon flux (15-150 keV)    in 76.86 sec: 0.159069 ( -0.0203183  0.0203223 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.42798e-07 ( -1.20394e-07  1.23993e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.08841     (     )
Epeak [keV] : 42.4829      (   )
Norm@50keV  : 9.27564E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          37.02 using 59 PHA bins.
# Reduced chi-squared =         0.6611 for     56 degrees of freedom 
# Null hypothesis probability =   9.763386e-01
 
Photon flux (15-150 keV)    in 76.86 sec: 0.159116 ( -0.020309  0.020297 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.41714e-07 ( -1.19392e-07  1.25021e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -9.98625   ( 9.98625   9.98625 )
beta        : -2.02916    ( -0.292239   0.266652 )
Epeak [keV] : 13.2861      ( -13.2861 -13.2861 )
Norm@50keV   : 0.142191    ( -0.025836   0.024522 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          37.40 using 59 PHA bins.
# Reduced chi-squared =         0.6801 for     55 degrees of freedom 
# Null hypothesis probability =   9.666980e-01
 
Photon flux (15-150 keV)    in 76.86 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)  = 1.14e-06
S(50-100 keV) = 1.22e-06

T90 vs. Hardness ratio plot

T90                                   = 548.995999932289 sec.
Hardness ratio (energy fluence ratio) = 1.07018

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.935316
Count Ratio (50-100 keV) / (15-25 keV) = 0.579033

Mask shadow pattern

IMX = 6.058044271535602E-01, IMY = -1.673570671035416E-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:
-656.599400 -640.504200
-239.000000 35.444000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3198  35.4735    0.0  50.5 -175.8   1.2264   2.3   10.4	Her X-1                       
243.8467  36.6259    2.6  42.1 -173.3   1.5046   4.4 ------	UNKNOWN

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

Time interval of the image:
35.444000 112.300610
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5223  35.4268    9.0  50.7 -175.9   0.2977   1.3    6.0	Her X-1                       
153.8310  27.4723    1.1  32.1   15.4   1.3111  10.2 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
167.500600 874.300610
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
132.8399  41.8165    2.7  22.4  104.1   2.0435   4.3 ------	UNKNOWN                       
130.4109  -7.4335    4.2  41.6    5.1   1.8066   2.7 ------	UNKNOWN                       
153.8405  27.4768    1.1   0.0 -177.0   4.3894  10.7 ------	UNKNOWN                       
148.2741  -9.1793    2.6  37.0  -22.2   2.4780   4.4 ------	UNKNOWN                       
227.6000  50.6073    4.0  59.1 -166.1   8.7126   2.9 ------	UNKNOWN                       
224.1566  42.7970    5.9  57.8 -156.6   5.7469   1.9 ------	UNKNOWN                       
167.3835 -19.4329    3.0  48.7  -48.4   7.8741   3.9 ------	UNKNOWN                       
176.1892 -10.5019    4.5  43.7  -64.1   5.8239   2.6 ------	UNKNOWN

Plot creation:
Sat May 30 21:26:50 EDT 2015