batgrbproduct analysis for trigger=255029

batgrbproduct Analysis for Trigger=255029

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 20 12:05:46 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger255029
======================================================================

  Trigger: 00255029      Segment: 000

  BAT Trigger Time: 189864320   [s; MET]
      Trigger Stop: 189864416   [s; MET]
               UTC: 2007-01-07T12:05:18.316420    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 159.407793776817   Dec: -53.207754632713  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    17.29
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    17.29

  Flight Position:   [ source = BAT ]
    RA: 159.407793776817   Dec: -53.207754632713  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 159.425490693158   Dec: -53.2065285925257  [deg; J2000]  
        { 10h 37m 42.1s , -53d 12' 23.5" }
         +/- 1.19127676496544 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.453545268367258 [arcmin] (formal 1-sigma fit error)
    SNR: 23.6880248308494
 
  Angular difference between Flight and Ground position is 0.640187 arcmin
 
  Partial Coding Fraction: 0.5390625    [ including projection effects ]

  Duration
     T90: 370.299999982119 +/- 45.6328837409909
        Measured from: -15.5679999887943
                   to: 354.731999993324     [s; relative to TRIGTIME]
     T50: 43.0120000243187 +/- 6.02942386236866
        Measured from: -5.49200001358986
                   to: 37.5200000107288     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -7.24000000953674     
                   to: -6.24000000953674     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -20.5079999864101     
                   to: 465.324000000954     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.991942   2.584329   2.422122   1.117193
           0.125282   0.129398   0.113595   0.100410 [error]
 Peak      0.038051   0.084101   0.092730   0.038397
           0.008321   0.009158   0.008818   0.007569 [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 5.52e-07 1.17e-06 1.95e-06 7.36e-06 5.36e-06 1.10e-05   erg/cm2
              Error 5.89e-08 7.13e-08 1.11e-07 1.01e-06 2.80e-07 1.06e-06   erg/cm2
Peak flux Power-law 4.23e-01 5.89e-01 6.05e-01 1.14e+00 1.98e+00 2.75e+00   ph/cm2/s
              Error 1.06e-01 8.81e-02 6.80e-02 2.94e-01 2.27e-01 3.21e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.50e-07 1.17e-06 1.95e-06 7.31e-06 5.36e-06 1.11e-05   erg/cm2
              Error 4.69e-08 6.78e-08 1.10e-07 -------- 2.80e-07 --------   erg/cm2
Peak flux Cutoff-PL 4.32e-01 5.94e-01 6.03e-01 1.11e+00 1.99e+00 2.73e+00   ph/cm2/s
              Error 1.07e-01 8.78e-02 6.82e-02 2.58e-01 2.27e-01 3.64e-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    1.266    0.096    -      -           1.11e-03 5.45e-05   60.020 57
CPL   1.263    0.096    9999.4    0.0      1.11e-03 8.75e-05   60.130 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.960    0.205    -      -           1.72e-02 1.93e-03   56.450 57
CPL   0.963    0.209    9999.4    0.0      1.73e-02 4.97e-03   56.490 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: 196.032000 sec.
T50 in the 50-300 keV band: 20.928000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  485.832  -20.508  465.324
T90   370.300  -15.568  354.732
T50    43.012   -5.492   37.520
Peak    1.000   -7.240   -6.240

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
  159.4255   -53.2065   0.0081    37.9498   166.9295         3.8346524     23.688 TRIG_00255029                 
 
Foreground time interval of the image:
 -0.899 105.301 (delta_t = 106.200 [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 96.000000

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 96.000000

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 96.000000

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  -20.508 sec. to  465.324 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.26595     ( -0.0960558   0.0950733 )
Norm@50keV  : 1.10722E-03    ( -5.45422e-05   5.44275e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.02 using 59 PHA bins.
# Reduced chi-squared =          1.053 for     57 degrees of freedom 
# Null hypothesis probability =   3.669099e-01
 
Photon flux (15-150 keV)    in 485.8 sec: 0.131302 ( -0.00703488  0.00705897 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.36085e-06 ( -2.79005e-07  2.80184e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -20.508 sec. to  465.324 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.26289     ( -0.0975379   0.0948749 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 1.11210E-03    ( -5.4302e-05   0.000120657 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.13 using 59 PHA bins.
# Reduced chi-squared =          1.074 for     56 degrees of freedom 
# Null hypothesis probability =   3.286492e-01
 
Photon flux (15-150 keV)    in 485.8 sec: 0.131622 ( -0.007477  0.00673 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.36236e-06 ( -2.80112e-07  2.79384e-07 ) ergs/cm2

Band function

Time interval is from  -20.508 sec. to  465.324 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.01552   ( 1.01552   1.01552 )
beta        : -1.26594    ( -0.0950703   0.0960813 )
Epeak [keV] : 41.2026      ( -41.2025 -41.2025 )
Norm@50keV   : 2.10340E-03    ( -0.000962044   0.155784 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.02 using 59 PHA bins.
# Reduced chi-squared =          1.091 for     55 degrees of freedom 
# Null hypothesis probability =   2.988252e-01
 
Photon flux (15-150 keV)    in 485.8 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]    : 20.8189  (  )
R^2/D10^2   : 4.94751E-03  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         196.28 using 59 PHA bins.
# Reduced chi-squared =         3.4435 for     57 degrees of freedom 
# Null hypothesis probability =   3.436495e-17
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.975e-07   2.118e-08
25- 50  1.010e-06   8.744e-08
50-150  3.260e-06   2.754e-07
15-150  4.467e-06   2.648e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 0.555675       (-0.027614     0.0276028)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          98.61 using 59 PHA bins.
# Reduced chi-squared =          1.730 for     57 degrees of freedom 
# Null hypothesis probability =   5.207514e-04
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.721e-07   4.008e-08
25- 50  1.293e-06   6.753e-08
50-150  2.835e-06   1.601e-07
15-150  4.800e-06   2.832e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.24712        (-1.09533      1.24404)
R1^2/D10^2  : 0.122047        (-0.0522591      0.102363)
kT2 [keV]   : 38.5444        (-6.27945      10.2917)
R2^2/D10^2  : 6.27384E-04    (-0.000301982   0.000447298)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.86 using 59 PHA bins.
# Reduced chi-squared =          1.034 for     55 degrees of freedom 
# Null hypothesis probability =   4.054827e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.779e-07   1.111e-07
25- 50  1.163e-06   1.674e-07
50-150  3.834e-06   6.524e-07
15-150  5.575e-06   8.387e-07

Peak spectrum fit

Power-law model

Time interval is from   -7.240 sec. to   -6.240 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.960276     ( -0.209445   0.199578 )
Norm@50keV  : 1.72165E-02    ( -0.00194641   0.00191995 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.45 using 59 PHA bins.
# Reduced chi-squared =         0.9903 for     57 degrees of freedom 
# Null hypothesis probability =   4.958423e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.97875 ( -0.22627  0.226959 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.88866e-07 ( -2.14396e-08  2.14917e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -7.240 sec. to   -6.240 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.962809     ( -0.22552   0.193352 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 1.73473E-02    ( -0.00197197   0.00796363 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.49 using 59 PHA bins.
# Reduced chi-squared =          1.009 for     56 degrees of freedom 
# Null hypothesis probability =   4.566771e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.98521 ( -0.23271  0.22062 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.88718e-07 ( -2.1262e-08  1.081e-08 ) ergs/cm2

Band function

Time interval is from   -7.240 sec. to   -6.240 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.799747   ( 0.799712   0.799712 )
beta        : -0.960270    ( -0.199518   0.209397 )
Epeak [keV] : 51.0156      ( -51.0592 -51.0592 )
Norm@50keV   : 2.78299E-02    ( -0.0111792   886701 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.45 using 59 PHA bins.
# Reduced chi-squared =          1.026 for     55 degrees of freedom 
# Null hypothesis probability =   4.207016e-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]    : 24.2483  (-3.8824  5.16701)
R^2/D10^2   : 5.13285E-02  (-0.0227654   0.0375371)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          80.08 using 59 PHA bins.
# Reduced chi-squared =          1.405 for     57 degrees of freedom 
# Null hypothesis probability =   2.361430e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.327e-09   1.400e-09
25- 50  2.975e-08   5.865e-09
50-150  1.302e-07   2.424e-08
15-150  1.653e-07   2.720e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 8.26907       (-0.933427     0.933313)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          82.43 using 59 PHA bins.
# Reduced chi-squared =          1.446 for     57 degrees of freedom 
# Null hypothesis probability =   1.544924e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.060e-08   1.148e-08
25- 50  3.962e-08   2.152e-08
50-150  8.690e-08   4.822e-08
15-150  1.471e-07   8.015e-08

Double BB

------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 11.7146        (-3.03106      3.32132)
R1^2/D10^2  : 0.380768        (-0.250679      0.767229)
kT2 [keV]   : 200.000        (      )
R2^2/D10^2  : 4.21737E-04    (-0.000101569   0.00120588)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.13 using 59 PHA bins.
#Fit statistic : Chi-Squared =          53.74 using 59 PHA bins.
# Reduced chi-squared =         0.9842 for     55 degrees of freedom 
# Reduced chi-squared =         0.9772 for     55 degrees of freedom 
# Null hypothesis probability =   5.078405e-01
# Null hypothesis probability =   5.226735e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.215e-08   6.100e-09
25- 50  3.791e-08   1.848e-08
50-150  1.423e-07   1.234e-07
15-150  1.923e-07   1.372e-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: 1.32151     ( -0.108778   0.107865 )
Norm@50keV  : 2.49191E-03    ( -0.000144799   0.000144779 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.07 using 59 PHA bins.
# Reduced chi-squared =         0.8959 for     57 degrees of freedom 
# Null hypothesis probability =   6.960278e-01
 
Photon flux (15-150 keV)    in 106.2 sec: 0.298501 ( -0.0185708  0.018679 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.60168e-06 ( -1.62463e-07  1.63449e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.31785     ( -0.242757   0.144771 )
Epeak [keV] : 1.00000E+04      (   )
Norm@50keV  : 2.50195E-03    ( -0.000145352   0.000145292 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.10 using 59 PHA bins.
# Reduced chi-squared =         0.9124 for     56 degrees of freedom 
# Null hypothesis probability =   6.606177e-01
 
Photon flux (15-150 keV)    in 106.2 sec: 0.298598 ( -0.017996  0.018433 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.60045e-06 ( -1.60776e-07  1.61658e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.971050   ( 0.97573   0.97573 )
beta        : -1.32393    ( 1.32404   0.111351 )
Epeak [keV] : 65.5006      ( -65.9818 -65.9818 )
Norm@50keV   : 4.70717E-03    ( -0.00226857   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.07 using 59 PHA bins.
# Reduced chi-squared =         0.9286 for     55 degrees of freedom 
# Null hypothesis probability =   6.255008e-01
 
Photon flux (15-150 keV)    in 106.2 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)  = 1.17e-06
S(50-100 keV) = 1.95e-06

T90 vs. Hardness ratio plot

T90                                   = 370.299999982119 sec.
Hardness ratio (energy fluence ratio) = 1.66667

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.29739
Count Ratio (50-100 keV) / (15-25 keV) = 1.21596

Mask shadow pattern

IMX = -7.596719377047961E-01, IMY = -1.763688984303783E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 96.000000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 96.000000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 96.000000

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:
-0.899400 105.300630
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4828 -40.5526    3.1  38.6  133.5   0.8870   3.7    2.1	Vela X-1                      
170.1855 -60.5710    4.5  36.3 -177.7   0.3605   2.6    4.9	Cen X-3                       
186.6180 -62.7618    1.3  39.8 -165.8   1.3558   8.8    1.2	GX 301-2                      
162.5223 -48.0957    2.6  43.2  164.5   0.8970   4.4 ------	UNKNOWN                       
159.4255 -53.2065    0.5  37.9  166.9   3.8343  23.7 ------	UNKNOWN                       
168.8208 -78.1884    2.3  25.8 -149.8   0.5560   4.9 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
162.900600 963.097700
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5495 -40.5414    1.0  20.5   74.8   5.0660  11.3    1.2	Vela X-1                      
170.3949 -60.6199    4.7   9.5  -78.3   0.8759   2.5    2.3	Cen X-3                       
186.6684 -62.7773    0.6  17.1  -89.2   8.5037  20.4    0.5	GX 301-2                      
194.6861 -10.3727    2.8  51.3 -177.1   4.5541   4.2 ------	UNKNOWN                       
  9.2323 -69.2312    4.2  55.6  -31.5   6.6124   2.7 ------	UNKNOWN                       
304.5267 -77.9257    3.9  47.1  -53.2   6.1776   2.9 ------	UNKNOWN

Plot creation:
Sun May 31 11:03:41 EDT 2015