batgrbproduct analysis for trigger=114753

batgrbproduct Analysis for Trigger=114753

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 22:24:45 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger114753
======================================================================

  Trigger: 00114753      Segment: 000

  BAT Trigger Time: 135342283.968   [s; MET]
      Trigger Stop: 135342284.48   [s; MET]
               UTC: 2005-04-16T11:04:44.488360    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 188.478556551299   Dec: 21.0434055593792  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11
     Image Trigger?:     NO
     Rate S/N Ratio:     19.2613602842582  [ if not an image trigger ]
     Image S/N Ratio:    11

  Flight Position:   [ source = BAT ]
    RA: 188.478556551299   Dec: 21.0434055593792  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 188.47686787149   Dec: 21.0538092747204  [deg; J2000]  
        { 12h 33m 54.4s , +21d 03' 13.7" }
         +/- 1.75285249865101 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.660910674109587 [arcmin] (formal 1-sigma fit error)
    SNR: 13.6430259639745
 
  Angular difference between Flight and Ground position is 0.631345 arcmin
 
  Partial Coding Fraction: 0.1679688    [ including projection effects ]

  Duration
     T90: 6.66800001263618 +/- 3.4220859219317
        Measured from: 0.120000004768372
                   to: 6.78800001740456     [s; relative to TRIGTIME]
     T50: 1.68400001525879 +/- 0.444504214428811
        Measured from: 0.53999999165535
                   to: 2.22400000691414     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.0320000052452087     
                   to: 1.03200000524521     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0119999945163727     
                   to: 9.43999999761581     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.569522   0.346547   0.022968  -0.006475
           0.037993   0.038010   0.031542   0.027463 [error]
 Peak      0.275511   0.204669   0.027581  -0.004014
           0.017814   0.016605   0.011445   0.008957 [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 2.00e-07 1.35e-07 5.99e-08 3.67e-08 4.13e-07 4.31e-07   erg/cm2
              Error 2.46e-08 2.08e-08 1.95e-08 2.13e-08 5.42e-08 6.33e-08   erg/cm2
Peak flux Power-law 3.00e+00 1.39e+00 3.89e-01 1.36e-01 4.86e+00 4.91e+00   ph/cm2/s
              Error 3.45e-01 1.49e-01 7.92e-02 4.82e-02 4.69e-01 4.73e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.94e-07 1.53e-07 2.62e-08 5.33e-10 3.74e-07 3.74e-07   erg/cm2
              Error 2.66e-08 2.65e-08 -------- 3.72e-09 4.86e-08 4.87e-08   erg/cm2
Peak flux Cutoff-PL 2.79e+00 1.76e+00 1.92e-01 1.65e-03 4.74e+00 4.74e+00   ph/cm2/s
              Error 3.89e-01 2.13e-01 9.96e-02 5.58e-03 4.68e-01 4.68e-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    3.174    0.288    -      -           3.34e-03 8.20e-04   60.960 57
CPL   0.840    1.626      14.7   10.6      1.40e-01 2.63e+00   53.260 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.836    0.194    -      -           1.98e-02 3.16e-03   60.280 57
CPL  -0.096    1.535      22.7    5.0      1.85e+00 1.79e+01   39.530 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    9.452   -0.012    9.440
T90     6.668    0.120    6.788
T50     1.684    0.540    2.224
Peak    1.000    0.032    1.032

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
  188.4769    21.0538   0.0141    36.2674    79.1129         0.9455894     13.643 TRIG_00114753                 
 
Foreground time interval of the image:
 -0.012   9.333 (delta_t =   9.345 [sec])
Background time interval of the image:
-299.968  -0.012 (delta_t = 299.956 [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   -0.012 sec. to    9.440 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.17416     ( -0.272504   0.3039 )
Norm@50keV  : 3.33738E-03    ( -0.000797009   0.000842413 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.96 using 59 PHA bins.
# Reduced chi-squared =          1.069 for     57 degrees of freedom 
# Null hypothesis probability =   3.355056e-01
 
Photon flux (15-150 keV)    in 9.452 sec: 1.04469 ( -0.113981  0.113991 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.12712e-07 ( -5.3132e-08  5.51942e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.012 sec. to    9.440 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.840423     ( -2.16322   1.08893 )
Epeak [keV] : 14.7449      ( -14.1813 7.02671 )
Norm@50keV  : 0.140374    ( -0.151146   5.10529 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.26 using 59 PHA bins.
# Reduced chi-squared =         0.9510 for     56 degrees of freedom 
# Null hypothesis probability =   5.793639e-01
 
Photon flux (15-150 keV)    in 9.452 sec: 1.01145 ( -0.113466  0.11379 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.73503e-07 ( -4.67004e-08  5.05162e-08 ) ergs/cm2

Band function

Time interval is from   -0.012 sec. to    9.440 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.854790   ( -1.16015   2.17841 )
beta        : -9.37167    ( 9.37167   19.368 )
Epeak [keV] : 14.7539      ( -6.21004 7.25172 )
Norm@50keV   : 0.135466    ( -0.135531   3.57384 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.26 using 59 PHA bins.
# Reduced chi-squared =         0.9684 for     55 degrees of freedom 
# Null hypothesis probability =   5.412368e-01
 
Photon flux (15-150 keV)    in 9.452 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]    : 5.52375  (-0.615628  0.673207)
R^2/D10^2   : 5.49002  (-2.26012   4.09423)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.96 using 59 PHA bins.
# Reduced chi-squared =         0.9992 for     57 degrees of freedom 
# Null hypothesis probability =   4.767563e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.850e-07   3.058e-08
25- 50  1.532e-07   3.138e-08
50-150  9.872e-09   4.616e-09
15-150  3.481e-07   5.459e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 16.9409       (-3.27343      4.1855)
Norm        : 15.6478       (-4.08644     6.02487)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.59 using 59 PHA bins.
# Reduced chi-squared =         0.9401 for     57 degrees of freedom 
# Null hypothesis probability =   6.038564e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.964e-07   2.859e-08
25- 50  1.499e-07   2.774e-08
50-150  3.347e-08   1.647e-08
15-150  3.798e-07   5.269e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.83602        (-2.114      2.15265)
R1^2/D10^2  : 65.1988        (-63.5331      1.32243e+08)
kT2 [keV]   : 6.83086        (-1.26784      4.04191)
R2^2/D10^2  : 1.63398    (-1.69062   3.84916)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.58 using 59 PHA bins.
# Reduced chi-squared =         0.9561 for     55 degrees of freedom 
# Null hypothesis probability =   5.674620e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.934e-07   9.395e-08
25- 50  1.568e-07   8.682e-08
50-150  2.233e-08   1.377e-08
15-150  3.725e-07   1.859e-07

Peak spectrum fit

Power-law model

Time interval is from    0.032 sec. to    1.032 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.83634     ( -0.186671   0.200532 )
Norm@50keV  : 1.98356E-02    ( -0.00314318   0.00316919 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.28 using 59 PHA bins.
# Reduced chi-squared =          1.057 for     57 degrees of freedom 
# Null hypothesis probability =   3.581407e-01
 
Photon flux (15-150 keV)    in 1 sec: 4.85586 ( -0.468519  0.468589 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.22111e-07 ( -2.38797e-08  2.42379e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.032 sec. to    1.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -9.62694E-02     ( -1.70198   1.36881 )
Epeak [keV] : 22.6898      ( -6.46641 3.43452 )
Norm@50keV  : 1.85385    ( -2.51674   33.3214 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.53 using 59 PHA bins.
# Reduced chi-squared =         0.7059 for     56 degrees of freedom 
# Null hypothesis probability =   9.532493e-01
 
Photon flux (15-150 keV)    in 1 sec: 4.73892 ( -0.4678  0.46778 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.98448e-07 ( -2.0618e-08  2.1417e-08 ) ergs/cm2

Band function

Time interval is from    0.032 sec. to    1.032 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 5.64191E-02   ( -1.33035   -0.22677 )
beta        : -9.37167    ( 5.2279   15.2157 )
Epeak [keV] : 22.6121      ( -6.18225 3.3817 )
Norm@50keV   : 1.73179    ( -2.69482   5306.28 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.57 using 59 PHA bins.
# Reduced chi-squared =         0.7195 for     55 degrees of freedom 
# Null hypothesis probability =   9.419416e-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]    : 6.46125  (-0.55315  0.592311)
R^2/D10^2   : 13.4679  (-4.38936   6.66683)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.64 using 59 PHA bins.
# Reduced chi-squared =         0.7305 for     57 degrees of freedom 
# Null hypothesis probability =   9.368860e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.248e-08   1.345e-08
25- 50  9.623e-08   1.314e-08
50-150  1.183e-08   4.163e-09
15-150  1.905e-07   2.145e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 22.4979       (-3.55789      4.38628)
Norm        : 52.9720       (-10.2902     13.0639)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.56 using 59 PHA bins.
# Reduced chi-squared =         0.7643 for     57 degrees of freedom 
# Null hypothesis probability =   9.048878e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.018e-08   1.102e-08
25- 50  8.612e-08   1.083e-08
50-150  3.121e-08   1.082e-08
15-150  2.075e-07   2.290e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.59588        (-4.59588      -4.59588)
R1^2/D10^2  : 30.4304        (-30.4304      -30.4304)
kT2 [keV]   : 8.29029        (-8.29029      -8.29029)
R2^2/D10^2  : 2.73791    (-2.73791   12.2535)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.13 using 59 PHA bins.
# Reduced chi-squared =         0.7114 for     55 degrees of freedom 
# Null hypothesis probability =   9.478664e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.707e-08   5.385e-08
25- 50  9.243e-08   5.205e-08
50-150  1.987e-08   1.184e-08
15-150  1.994e-07   1.036e-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: 3.19356     ( -0.274814   0.306469 )
Norm@50keV  : 3.29089E-03    ( -0.000794525   0.000842555 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.42 using 59 PHA bins.
# Reduced chi-squared =          1.042 for     57 degrees of freedom 
# Null hypothesis probability =   3.876879e-01
 
Photon flux (15-150 keV)    in 9.345 sec: 1.04546 ( -0.114743  0.114761 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.0646e-07 ( -5.25837e-08  5.46042e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.817838     ( -2.17604   1.23547 )
Epeak [keV] : 14.7343      (   )
Norm@50keV  : 0.148740    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.47 using 59 PHA bins.
# Reduced chi-squared =         0.9191 for     56 degrees of freedom 
# Null hypothesis probability =   6.467826e-01
 
Photon flux (15-150 keV)    in 9.345 sec: 1.01308 ( -0.114103  0.11438 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.68576e-07 ( -4.60877e-08  4.96687e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.835677   ( -1.16543   2.21531 )
beta        : -9.37167    ( 9.37167   19.3676 )
Epeak [keV] : 14.7397      ( -6.16717 7.19876 )
Norm@50keV   : 0.142431    ( -0.142505   5.29612 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.48 using 59 PHA bins.
# Reduced chi-squared =         0.9360 for     55 degrees of freedom 
# Null hypothesis probability =   6.098375e-01
 
Photon flux (15-150 keV)    in 9.345 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)  = 1.35e-07
S(50-100 keV) = 5.99e-08

T90 vs. Hardness ratio plot

T90                                   = 6.66800001263618 sec.
Hardness ratio (energy fluence ratio) = 0.443704

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.608487
Count Ratio (50-100 keV) / (15-25 keV) = 0.0403286

Mask shadow pattern

IMX = 1.385760221107429E-01, IMY = -7.204914652107425E-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:
-299.968000 -0.012000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
211.1648  42.3402    2.5  40.9   33.1   1.5331   4.6 ------	UNKNOWN                       
149.2186  19.7230    2.3  24.2  153.3   0.9291   5.1 ------	UNKNOWN                       
143.6562  36.2225    2.3  10.9 -166.9   0.8580   5.1 ------	UNKNOWN                       
176.6087  60.2915    2.9  21.5   -7.1   0.6519   4.1 ------	UNKNOWN                       
111.6727  -1.5350    3.0  59.0 -166.1   4.1083   3.9 ------	UNKNOWN                       
293.6117  77.6150    2.8  56.3  -28.5   4.0707   4.2 ------	UNKNOWN

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

Time interval of the image:
-0.012000 9.332590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
188.4769  21.0538    0.8  36.3   79.1   0.9457  13.6 ------	UNKNOWN                       
161.3095   6.4395    2.7  37.6  130.2   0.2522   4.2 ------	UNKNOWN                       
137.0235   3.8980    2.2  42.5  167.7   0.2360   5.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
63.532590 302.065900
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
229.3219   6.5356    3.3  42.1   42.6   1.3705   3.6 ------	UNKNOWN                       
250.2189  36.4391    2.7  55.3   -2.0   2.2245   4.3 ------	UNKNOWN                       
190.6927  26.0788    2.6   5.4  -40.0   0.5806   4.5 ------	UNKNOWN                       
157.2431  19.7974    2.7  29.3 -148.3   0.6622   4.2 ------	UNKNOWN                       
157.4041  32.5332    3.1  29.9 -122.4   0.7169   3.7 ------	UNKNOWN                       
163.1037  43.1841    2.4  30.6  -99.4   1.0572   4.7 ------	UNKNOWN

Plot creation:
Sun May 31 17:02:33 EDT 2015