batgrbproduct analysis for trigger=596958

batgrbproduct Analysis for Trigger=596958

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
4) This page will be updated for up to 10 downlinks after the trigger.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed May  7 22:31:40 EDT 2014
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger596958/heasarc_download
======================================================================

  Trigger: 00596958      Segment: 000

  BAT Trigger Time: 419980040   [s; MET]
      Trigger Stop: 419980104   [s; MET]
               UTC: 2014-04-23T21:07:08.075860    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 202.927754553838   Dec: 29.2583028285461  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.9
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.9

  Flight Position:   [ source = BAT ]
    RA: 202.927754553838   Dec: 29.2583028285461  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 202.919783112864   Dec: 29.2520468699805  [deg; J2000]  
        { 13h 31m 40.7s , +29d 15' 07.4" }
         +/- 2.49578509939269 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.998054497199163 [arcmin] (formal 1-sigma fit error)
    SNR: 8.23530220287403
 
  Angular difference between Flight and Ground position is 0.561264 arcmin
 
  Partial Coding Fraction: 0.9375    [ including projection effects ]

  Duration
     T90: 289.147999942303 +/- 56.468827807655
        Measured from: -17.555999994278
                   to: 271.591999948025     [s; relative to TRIGTIME]
     T50: 183.099999964237 +/- 73.8436168071542
        Measured from: 26.1039999723434
                   to: 209.203999936581     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 37.5320000052452     
                   to: 38.5320000052452     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -28.1039999723434     
                   to: 338.811999976635     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.049952   0.618508   0.149078   0.043688
           0.096468   0.096023   0.086120   0.080728 [error]
 Peak      0.008362   0.016299   0.011102   0.005973
           0.005183   0.005192   0.004673   0.004229 [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 2.97e-07 2.55e-07 1.50e-07 1.32e-07 7.60e-07 8.34e-07   erg/cm2
              Error 4.84e-08 4.90e-08 6.13e-08 9.98e-08 1.46e-07 2.01e-07   erg/cm2
Peak flux Power-law 6.27e-02 8.79e-02 9.12e-02 1.74e-01 2.97e-01 4.16e-01   ph/cm2/s
              Error 5.41e-02 6.55e-02 3.69e-02 1.90e-01 2.06e-01 1.87e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.94e-07 2.71e-07 1.18e-07 2.53e-08 7.02e-07 7.08e-07   erg/cm2
              Error 5.03e-08 5.94e-08 8.32e-08 1.17e-07 1.64e-07 2.27e-07   erg/cm2
Peak flux Cutoff-PL 6.50e-02 8.92e-02 2.99e-01 4.12e-01 0.00e+00 0.00e+00   ph/cm2/s
              Error 6.25e-02 1.15e-01 2.05e-01 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
 
Fluence        Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s

 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.768    0.374    -      -           1.90e-04 5.74e-05   55.630 57
CPL   1.870    0.000       4.6    0.0      7.66e-04 0.00e+00   54.940 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.947    0.824    -      -           2.58e-03 1.02e-03   47.330 57
CPL   0.962    0.914    9999.4    0.0      2.61e-03 8.73e-03   47.330 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  366.916  -28.104  338.812
T90   289.148  -17.556  271.592
T50   183.100   26.104  209.204
Peak    1.000   37.532   38.532

Click here for the BAT GCN circular template

Image

Pre-slew 15-350 keV image (Event data; bkg subtracted)

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  202.9198 +29.2520 0.0234   13.1  126.2       0.9713     8.2  TRIG_00596958       
------------------------------------------
 
Foreground time interval of the image:
-28.104  72.701 (delta_t = 100.805 [sec])
Background time interval of the image:
-239.000 -28.104 (delta_t = 210.896 [sec])

Lightcurves

Notes:

1) All plots contain as much data as has been downloaded to date.
2) The mask-weighted light curves are using the flight position.
3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
4) 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.
5) 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.
6) 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)

Flight mask-tagged light curves

Caution: Mask-weight map is always using the same on-axis map

Quad-rate summed light curves (from T0-300 to T0+1000)

The mask-weighted light curves based on cleaned DPHs

Spectra

Notes:

1) The fitting includes the systematic errors.
2) For long bursts, a spectral fit of 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.
4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.

Time averaged spectrum fit using the pre-slew DRM

Power-law model

Time interval is from  -28.104 sec. to  338.812 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.76770     ( -0.345341   0.402134 )
Norm@50keV  : 1.89917E-04    ( -5.63209e-05   5.84174e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.63 using 59 PHA bins.
# Reduced chi-squared =         0.9760 for     57 degrees of freedom 
# Null hypothesis probability =   5.264864e-01
 
Photon flux (15-150 keV)    in 366.9 sec: 4.43545E-02 ( -0.00623126  0.00623982 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.59677e-07 ( -1.40294e-07  1.51136e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -28.104 sec. to  338.812 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.86973     (     )
Epeak [keV] : 4.60465      (   )
Norm@50keV  : 7.66446E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.94 using 59 PHA bins.
# Reduced chi-squared =         0.9810 for     56 degrees of freedom 
# Null hypothesis probability =   5.151340e-01
 
Photon flux (15-150 keV)    in 366.9 sec: 4.34452E-02 ( -0.0062983  0.0064288 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.0239e-07 ( -1.41168e-07  1.86605e-07 ) ergs/cm2

Band function

Time interval is from  -28.104 sec. to  338.812 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -2.59520   ( 0.822496   2.5952 )
beta        : -2.76771    ( -0.402048   0.345186 )
Epeak [keV] : 56.3783      ( -56.3783 -56.3783 )
Norm@50keV   : 2.58122E-02    ( -0.00765458   0.00793997 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.63 using 59 PHA bins.
# Reduced chi-squared =          1.012 for     55 degrees of freedom 
# Null hypothesis probability =   4.507783e-01
 
Photon flux (15-150 keV)    in 366.9 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]    : 5.95045  (-0.933365  1.09752)
R^2/D10^2   : 0.163930  (-0.0848331   0.186166)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.73 using 59 PHA bins.
# Reduced chi-squared =          1.065 for     57 degrees of freedom 
# Null hypothesis probability =   3.430027e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.796e-07   7.125e-08
25- 50  2.738e-07   8.565e-08
50-150  2.423e-08   1.391e-08
15-150  5.776e-07   1.427e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 22.8963       (-6.69165      10.2487)
Norm        : 0.457454       (-0.140128     0.234273)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.26 using 59 PHA bins.
# Reduced chi-squared =         0.9694 for     57 degrees of freedom 
# Null hypothesis probability =   5.407870e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.894e-07   5.936e-08
25- 50  2.798e-07   6.723e-08
50-150  1.042e-07   6.117e-08
15-150  6.734e-07   1.455e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.90900        (-3.90865      1.802)
R1^2/D10^2  : 0.766442        (-0.594218      -0.766445)
kT2 [keV]   : 10.9151        (-10.9143      14.412)
R2^2/D10^2  : 7.44504E-03    (-0.00728269   0.173605)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.12 using 59 PHA bins.
# Reduced chi-squared =          1.002 for     55 degrees of freedom 
# Null hypothesis probability =   4.702419e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.964e-07   1.586e-07
25- 50  2.673e-07   1.395e-07
50-150  1.280e-07   8.844e-08
15-150  6.916e-07   3.530e-07

Peak spectrum fit

Power-law model

Time interval is from   37.532 sec. to   38.532 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.946658     ( -0.911808   0.735658 )
Norm@50keV  : 2.58379E-03    ( -0.00106556   0.000975604 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.33 using 59 PHA bins.
# Reduced chi-squared =         0.8303 for     57 degrees of freedom 
# Null hypothesis probability =   8.158489e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.296806 ( -0.296814  0.115787 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.84863e-08 ( -1.14293e-08  1.17044e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   37.532 sec. to   38.532 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.961745     ( -1.10567   0.721443 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 2.60639E-03    ( -0.00107201   0.0163873 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.33 using 59 PHA bins.
# Reduced chi-squared =         0.8452 for     56 degrees of freedom 
# Null hypothesis probability =   7.885872e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.298513 ( -0.116218  0.113881 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Band function

Time interval is from   37.532 sec. to   38.532 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.827369   ( 0.827366   0.827366 )
beta        : -0.946636    ( 0.946631   0.911954 )
Epeak [keV] : 36.9401      ( -36.9409 -36.9409 )
Norm@50keV   : 3.96390E-03    ( -0.00233086   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.33 using 59 PHA bins.
# Reduced chi-squared =         0.8605 for     55 degrees of freedom 
# Null hypothesis probability =   7.594093e-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]    : 28.4158  (-15.2695  79.1782)
R^2/D10^2   : 4.72148E-03  (-0.00466171   0.0458257)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.02 using 59 PHA bins.
# Reduced chi-squared =         0.8775 for     57 degrees of freedom 
# Null hypothesis probability =   7.322471e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.163e-10   4.059e-10
25- 50  3.715e-09   2.386e-09
50-150  2.160e-08   1.412e-08
15-150  2.593e-08   1.722e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-123.161      -199.363)
Norm        : 1.21882       (-0.473385     0.473402)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.42 using 59 PHA bins.
# Reduced chi-squared =         0.8670 for     57 degrees of freedom 
# Null hypothesis probability =   7.521046e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.035e-09   1.999e-09
25- 50  5.838e-09   3.698e-09
50-150  1.280e-08   8.240e-09
15-150  2.168e-08   1.449e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.80047        (-4.96714      12.1716)
R1^2/D10^2  : 0.213442        (-0.205305      11.3543)
kT2 [keV]   : 70.6026        (-48.4176      -70.4442)
R2^2/D10^2  : 4.35434E-04    (-0.000405361   0.00684578)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.30 using 59 PHA bins.
# Reduced chi-squared =         0.8418 for     55 degrees of freedom 
# Null hypothesis probability =   7.919387e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.482e-09   1.627e-09
25- 50  5.237e-09   2.986e-09
50-150  2.326e-08   1.231e-08
15-150  3.098e-08   1.669e-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: 2.76161     ( -0.348199   0.403817 )
Norm@50keV  : 3.43575E-04    ( -0.000104921   0.000110038 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.17 using 59 PHA bins.
# Reduced chi-squared =          1.056 for     57 degrees of freedom 
# Null hypothesis probability =   3.617696e-01
 
Photon flux (15-150 keV)    in 100.8 sec: 7.99105E-02 ( -0.0120161  0.0120431 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.76715e-07 ( -7.37427e-08  7.96673e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.935271     ( -3.37883   1.06929 )
Epeak [keV] : 17.3694      ( -16.5132 8.45462 )
Norm@50keV  : 6.45411E-03    ( -0.00674592   2.03768 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.66 using 59 PHA bins.
# Reduced chi-squared =          1.030 for     56 degrees of freedom 
# Null hypothesis probability =   4.134700e-01
 
Photon flux (15-150 keV)    in 100.8 sec: 7.73650E-02 ( -0.0117606  0.0119367 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.262e-07 ( -6.34909e-08  8.53756e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.538630   ( -0.485464   -0.485464 )
beta        : -3.59172    ( 3.59783   0.947005 )
Epeak [keV] : 20.6760      ( -20.5816 5.21131 )
Norm@50keV   : 8.77722E-02    ( -0.0678156   143.77 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.53 using 59 PHA bins.
# Reduced chi-squared =          1.046 for     55 degrees of freedom 
# Null hypothesis probability =   3.818387e-01
 
Photon flux (15-150 keV)    in 100.8 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)  = 2.55386e-07
S(50-100 keV) = 1.5e-07

T90 vs. Hardness ratio plot

T90                                   = 289.147999942303 sec.
Hardness ratio (energy fluence ratio) = 0.587346

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.589082
Count Ratio (50-100 keV) / (15-25 keV) = 0.141986

Mask shadow pattern

IMX = -1.378891786252426E-01, IMY = -1.881332165257474E-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:
-239.000000 -28.104000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3388  35.5047  141.6  34.7    1.5   0.0170   0.1   11.3	Her X-1                       
241.8257   6.0922    2.6  44.9   49.5   2.8447   4.4 ------	UNKNOWN                       
172.2336   5.5785    2.6  49.0  151.4   3.1669   4.4 ------	UNKNOWN                       
270.2987  25.1964    2.3  51.7    5.3   2.3971   5.0 ------	UNKNOWN                       
274.2912  26.9230    2.7  53.8    1.0   2.4210   4.3 ------	UNKNOWN                       
284.6325  68.7435    2.9  46.8  -54.2   3.3184   4.0 ------	UNKNOWN

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

Time interval of the image:
-28.104000 72.700630
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4954  35.4624    4.2  34.9    1.5   0.4243   2.8    7.4	Her X-1                       
202.9198  29.2521    1.4  13.1  126.2   0.9714   8.2 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
106.100600 331.500600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4004  35.4768  481.2  43.4   -9.6  -0.0062  -0.0    8.5	Her X-1                       
169.2343  19.7840    2.6  32.0 -177.1   0.8690   4.5 ------	UNKNOWN                       
141.7761  15.4844    2.8  57.6 -167.2   3.7760   4.1 ------	UNKNOWN                       
271.2781  41.7524    2.1  55.5  -20.3   3.4000   5.5 ------	UNKNOWN                       
263.1587  49.6346    2.1  49.2  -29.6   2.1808   5.5 ------	UNKNOWN

Plot creation:
Wed May  7 22:36:06 EDT 2014