batgrbproduct analysis for trigger=114485

batgrbproduct Analysis for Trigger=114485

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 Jan 22 22:27:04 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger114485
======================================================================

  Trigger: 00114485      Segment: 000

  BAT Trigger Time: 134977442.368   [s; MET]
      Trigger Stop: 134977444.416   [s; MET]
               UTC: 2005-04-12T05:44:02.894760    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 181.120322462344   Dec: -1.25227292288913  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9
     Image Trigger?:     NO
     Rate S/N Ratio:     18.5741756210067  [ if not an image trigger ]
     Image S/N Ratio:    9

  Flight Position:   [ source = BAT ]
    RA: 181.120322462344   Dec: -1.25227292288913  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 181.101457535243   Dec: -1.18516071049333  [deg; J2000]  
        { 12h 04m 24.3s , -01d 11' 06.6" }
         +/- 1.54742017871378 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.884869962203484 [arcmin] (formal 1-sigma fit error)
    SNR: 16.3023211016515
 
  Angular difference between Flight and Ground position is 4.182725 arcmin
 
  Partial Coding Fraction: 0.953125    [ including projection effects ]

  Duration
     T90: 27.5719999969006 +/- 3.5047145410041
        Measured from: -6.31999999284744
                   to: 21.2520000040531     [s; relative to TRIGTIME]
     T50: 10.3760000169277 +/- 3.3321734677688
        Measured from: -1.63600000739098
                   to: 8.74000000953674     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.14399999380112     
                   to: 2.14399999380112     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -8.28400000929832     
                   to: 23.9079999923706     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.127352   0.250516   0.323186   0.142428
           0.024029   0.025303   0.023015   0.020181 [error]
 Peak      0.013649   0.012926   0.031446   0.015349
           0.004278   0.004599   0.004391   0.003705 [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 3.21e-08 9.71e-08 2.40e-07 1.66e-06 6.50e-07 2.03e-06   erg/cm2
              Error 7.01e-09 1.24e-08 2.08e-08 3.72e-07 5.81e-08 3.75e-07   erg/cm2
Peak flux Power-law 7.14e-02 1.25e-01 1.68e-01 4.63e-01 4.89e-01 8.28e-01   ph/cm2/s
              Error 3.64e-02 3.87e-02 3.19e-02 2.09e-01 9.88e-02 2.03e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.27e-08 9.80e-08 2.40e-07 1.62e-06 6.49e-07 1.99e-06   erg/cm2
              Error 7.40e-09 1.24e-08 2.17e-08 5.46e-07 4.31e-08 4.60e-07   erg/cm2
Peak flux Cutoff-PL 7.15e-02 1.26e-01 1.68e-01 4.58e-01 4.89e-01 8.24e-01   ph/cm2/s
              Error 4.41e-02 4.07e-02 3.90e-02 -------- 1.01e-01 2.79e-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    0.696    0.170    -      -           1.65e-03 1.58e-04   28.820 57
CPL   0.695    0.195    9999.4    0.0      1.66e-03 4.80e-04   28.850 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.576    0.386    -      -           4.17e-03 9.44e-04   69.030 57
CPL   0.566    0.811    10000.0    0.0      4.21e-03 -1.62e-03   69.020 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: 28.416000 sec.
T50 in the 50-300 keV band: 8.640000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   32.192   -8.284   23.908
T90    27.572   -6.320   21.252
T50    10.376   -1.636    8.740
Peak    1.000    1.144    2.144

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
  181.1015    -1.1852   0.0118    12.0834   126.5380         0.8626790     16.302 TRIG_00114485                 
 
Foreground time interval of the image:
 -8.284  23.908 (delta_t =  32.192 [sec])
Background time interval of the image:
-130.067  -8.284 (delta_t = 121.783 [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)

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   -8.284 sec. to   23.908 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.696030     ( -0.174526   0.165924 )
Norm@50keV  : 1.65073E-03    ( -0.000159718   0.00015622 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          28.82 using 59 PHA bins.
# Reduced chi-squared =         0.5056 for     57 degrees of freedom 
# Null hypothesis probability =   9.993234e-01
 
Photon flux (15-150 keV)    in 32.19 sec: 0.190869 ( -0.0171092  0.0171775 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.49774e-07 ( -5.79372e-08  5.82713e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -8.284 sec. to   23.908 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.694500     ( -0.228599   0.161967 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 1.66445E-03    ( -0.000150611   0.000809872 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          28.85 using 59 PHA bins.
# Reduced chi-squared =         0.5152 for     56 degrees of freedom 
# Null hypothesis probability =   9.990136e-01
 
Photon flux (15-150 keV)    in 32.19 sec: 0.191020 ( -0.017318  0.016978 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.49073e-07 ( -5.72853e-08  2.89292e-08 ) ergs/cm2

Band function

Time interval is from   -8.284 sec. to   23.908 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.798795   ( 0.798795   0.798795 )
beta        : -0.696028    ( -0.165877   0.174515 )
Epeak [keV] : 16.0656      ( -16.0656 -16.0656 )
Norm@50keV   : 2.38330E-03    ( -0.000886003   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          28.82 using 59 PHA bins.
# Reduced chi-squared =         0.5240 for     55 degrees of freedom 
# Null hypothesis probability =   9.986213e-01
 
Photon flux (15-150 keV)    in 32.19 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]    : 30.1871  (-3.96246  5.12005)
R^2/D10^2   : 2.82094E-03  (-0.000991828   0.00140841)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.24 using 59 PHA bins.
# Reduced chi-squared =         0.8638 for     57 degrees of freedom 
# Null hypothesis probability =   7.579947e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.290e-08   2.641e-09
25- 50  7.975e-08   1.254e-08
50-150  5.121e-07   6.551e-08
15-150  6.048e-07   7.178e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 0.765712       (-0.0717516     0.071744)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         104.52 using 59 PHA bins.
# Reduced chi-squared =         1.8337 for     57 degrees of freedom 
# Null hypothesis probability =   1.266191e-04
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.139e-08   2.412e-08
25- 50  1.181e-07   5.235e-08
50-150  2.590e-07   1.310e-07
15-150  4.385e-07   1.722e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.08101        (-3.00491      5.11786)
R1^2/D10^2  : 7.22698E-02        (-0.0545928      0.299006)
kT2 [keV]   : 44.9799        (-11.335      49.4963)
R2^2/D10^2  : 8.75019E-04    (-0.000754837   0.000790555)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          28.83 using 59 PHA bins.
# Reduced chi-squared =         0.5242 for     55 degrees of freedom 
# Null hypothesis probability =   9.986128e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.442e-08   1.685e-08
25- 50  9.681e-08   3.557e-08
50-150  5.339e-07   2.338e-07
15-150  6.651e-07   2.579e-07

Peak spectrum fit

Power-law model

Time interval is from    1.144 sec. to    2.144 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.576125     ( -0.409774   0.36282 )
Norm@50keV  : 4.17280E-03    ( -0.000970684   0.000918303 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.03 using 59 PHA bins.
# Reduced chi-squared =          1.211 for     57 degrees of freedom 
# Null hypothesis probability =   1.319718e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.488671 ( -0.0984022  0.0992844 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.39809e-08 ( -1.0737e-08  1.07969e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    1.144 sec. to    2.144 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.566394     ( -1.20817   0.414415 )
Epeak [keV] : 10000.00      (   )
Norm@50keV  : 4.20733E-03    ( -0.00097581   -0.00420733 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.02 using 59 PHA bins.
# Reduced chi-squared =          1.233 for     56 degrees of freedom 
# Null hypothesis probability =   1.134670e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.488817 ( -0.104082  0.098877 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.39127e-08 ( -1.08534e-08  1.08767e-08 ) ergs/cm2

Band function

Time interval is from    1.144 sec. to    2.144 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.793845   ( 0.793845   0.793845 )
beta        : -0.576126    ( -0.36243   0.409775 )
Epeak [keV] : 16.0197      ( -16.0197 -16.0197 )
Norm@50keV   : 6.04013E-03    ( -0.00278374   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.03 using 59 PHA bins.
# Reduced chi-squared =          1.255 for     55 degrees of freedom 
# Null hypothesis probability =   9.672761e-02
 
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]    : 33.7339  (-8.58789  15.651)
R^2/D10^2   : 5.58279E-03  (-0.00347029   0.00714512)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.29 using 59 PHA bins.
# Reduced chi-squared =          1.251 for     57 degrees of freedom 
# Null hypothesis probability =   9.647306e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.221e-10   4.503e-10
25- 50  5.951e-09   2.210e-09
50-150  4.527e-08   1.821e-08
15-150  5.214e-08   2.432e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 1.88505       (-0.414125     0.414106)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          88.38 using 59 PHA bins.
# Reduced chi-squared =          1.551 for     57 degrees of freedom 
# Null hypothesis probability =   4.853531e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.693e-09   2.780e-09
25- 50  9.028e-09   5.365e-09
50-150  1.980e-08   1.176e-08
15-150  3.352e-08   2.002e-08

Double BB

------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.42740        (      )
R1^2/D10^2  : 0.343525        (-0.357115      8.99746)
kT2 [keV]   : 41.7562        (-13.1133      99.7514)
R2^2/D10^2  : 2.99327E-03    (-0.0015157   0.00240202)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.29 using 59 PHA bins.
#Fit statistic : Chi-Squared =          67.87 using 59 PHA bins.
# Reduced chi-squared =          1.296 for     55 degrees of freedom 
# Reduced chi-squared =          1.234 for     55 degrees of freedom 
# Null hypothesis probability =   6.887819e-02
# Null hypothesis probability =   1.140483e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00

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: 0.696030     ( -0.174526   0.165924 )
Norm@50keV  : 1.65073E-03    ( -0.000159718   0.00015622 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          28.82 using 59 PHA bins.
# Reduced chi-squared =         0.5056 for     57 degrees of freedom 
# Null hypothesis probability =   9.993234e-01
 
Photon flux (15-150 keV)    in 32.19 sec: 0.190869 ( -0.0171092  0.0171775 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.49774e-07 ( -5.79372e-08  5.82713e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.694500     ( -0.228599   0.161967 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 1.66445E-03    ( -0.000150611   0.000809872 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          28.85 using 59 PHA bins.
# Reduced chi-squared =         0.5152 for     56 degrees of freedom 
# Null hypothesis probability =   9.990136e-01
 
Photon flux (15-150 keV)    in 32.19 sec: 0.191020 ( -0.017318  0.016978 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.49073e-07 ( -5.72853e-08  2.89292e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.798795   ( 0.798795   0.798795 )
beta        : -0.696028    ( -0.165877   0.174515 )
Epeak [keV] : 16.0656      ( -16.0656 -16.0656 )
Norm@50keV   : 2.38330E-03    ( -0.000886003   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          28.82 using 59 PHA bins.
# Reduced chi-squared =         0.5240 for     55 degrees of freedom 
# Null hypothesis probability =   9.986213e-01
 
Photon flux (15-150 keV)    in 32.19 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)  = 9.71e-08
S(50-100 keV) = 2.40e-07

T90 vs. Hardness ratio plot

T90                                   = 27.5719999969006 sec.
Hardness ratio (energy fluence ratio) = 2.47168

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.96711
Count Ratio (50-100 keV) / (15-25 keV) = 2.53774

Mask shadow pattern

IMX = -1.274524455491652E-01, IMY = -1.720036888130351E-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:
-130.067410 -8.284000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
146.9640   3.7927    2.6  34.0 -150.1   0.5293   4.5 ------	UNKNOWN

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

Time interval of the image:
-8.284000 23.908000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
150.9978 -35.3224    2.4  54.0  159.2   1.4152   4.8 ------	UNKNOWN                       
187.1191   1.3556    2.7  11.6   94.4   0.2325   4.3 ------	UNKNOWN                       
181.1016  -1.1851    0.7  12.1  126.5   0.8622  16.3 ------	UNKNOWN                       
134.1794  20.7838    2.1  45.5 -122.1   1.1989   5.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
81.732600 242.666900
243.632000 302.690100
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4707 -40.5481   14.0  57.0 -161.2   0.5315   0.8    2.7	Vela X-1                      
214.0728  47.3180    2.1  56.4    4.7   4.0700   5.4 ------	UNKNOWN                       
179.7416  57.5918    3.3  58.8  -22.4   3.5666   3.5 ------	UNKNOWN

Plot creation:
Sun May 31 17:03:59 EDT 2015