batgrbproduct analysis for trigger=575754

batgrbproduct Analysis for Trigger=575754

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 Jun 10 12:46:02 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger575754
======================================================================

  Trigger: 00575754      Segment: 000

  BAT Trigger Time: 404343342.592   [s; MET]
      Trigger Stop: 404343346.688   [s; MET]
               UTC: 2013-10-24T21:35:31.401340    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 144.402931552422   Dec: 44.2397294748877  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.93
     Image Trigger?:     NO
     Rate S/N Ratio:     10.770329614269  [ if not an image trigger ]
     Image S/N Ratio:    6.93

  Flight Position:   [ source = BAT ]
    RA: 144.402931552422   Dec: 44.2397294748877  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 144.473118827521   Dec: 44.2621641391518  [deg; J2000]  
        { 09h 37m 53.5s , +44d 15' 43.8" }
         +/- 1.84302642275172 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.756252295468365 [arcmin] (formal 1-sigma fit error)
    SNR: 12.6995279353668
 
  Angular difference between Flight and Ground position is 3.303182 arcmin
 
  Partial Coding Fraction: 0.40625    [ including projection effects ]

  Duration
     T90: 96.8160000443459 +/- 27.4064459345517
        Measured from: -4.77600002288818
                   to: 92.0400000214577     [s; relative to TRIGTIME]
     T50: 41.0239999890327 +/- 13.3243236463996
        Measured from: 4.88800001144409
                   to: 45.9120000004768     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.03600001335144     
                   to: 2.03600001335144     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -8.28000003099442     
                   to: 101.01599997282     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.460638   0.456605   0.849941   0.249252
           0.077233   0.081109   0.073533   0.068567 [error]
 Peak      0.008705   0.022576   0.056342   0.017323
           0.008394   0.008888   0.008918   0.007983 [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 1.08e-07 2.70e-07 5.40e-07 2.71e-06 1.46e-06 3.62e-06   erg/cm2
              Error 2.76e-08 3.97e-08 6.89e-08 8.38e-07 1.82e-07 8.61e-07   erg/cm2
Peak flux Power-law 1.14e-01 2.00e-01 2.70e-01 7.48e-01 7.84e-01 1.33e+00   ph/cm2/s
              Error 6.56e-02 7.31e-02 6.47e-02 3.69e-01 2.00e-01 3.81e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.04e-07 2.71e-07 5.49e-07 2.29e-06 1.45e-06 3.25e-06   erg/cm2
              Error 2.71e-08 4.21e-08 8.23e-08 1.27e-06 1.42e-07 1.24e-06   erg/cm2
Peak flux Cutoff-PL 7.70e-03 1.27e-01 4.06e-01 1.15e-01 6.46e-01 6.56e-01   ph/cm2/s
              Error 3.40e-02 9.72e-02 1.04e-01 1.54e-01 1.90e-01 2.22e-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    0.998    0.218    -      -           1.23e-03 1.47e-04   64.080 57
CPL   0.865    0.676     515.8    0.0      1.40e-03 1.21e-03   64.010 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.570    0.419    -      -           6.69e-03 1.88e-03   73.270 57
CPL  -5.763    0.000      85.2   26.2      7.94e-01 0.00e+00   65.050 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: 52.224000 sec.
T50 in the 50-300 keV band: 26.304000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  109.296   -8.280  101.016
T90    96.816   -4.776   92.040
T50    41.024    4.888   45.912
Peak    1.000    1.036    2.036

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
  144.4731    44.2622   0.0151    28.2521    82.6909         1.7513642     12.700 TRIG_00575754                 
 
Foreground time interval of the image:
 -8.280  49.909 (delta_t =  58.189 [sec])
Background time interval of the image:
-239.592  -8.280 (delta_t = 231.312 [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   -8.280 sec. to  101.016 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.998425     ( -0.221691   0.21367 )
Norm@50keV  : 1.23326E-03    ( -0.000147436   0.000146264 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.08 using 59 PHA bins.
# Reduced chi-squared =          1.124 for     57 degrees of freedom 
# Null hypothesis probability =   2.421515e-01
 
Photon flux (15-150 keV)    in 109.3 sec: 0.142004 ( -0.0172043  0.0172259 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.45839e-06 ( -1.8169e-07  1.8279e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -8.280 sec. to  101.016 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.865488     ( -1.02249   0.328737 )
Epeak [keV] : 515.821      ( -515.455 -515.455 )
Norm@50keV  : 1.40257E-03    ( -0.000282279   0.00213721 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.01 using 59 PHA bins.
# Reduced chi-squared =          1.143 for     56 degrees of freedom 
# Null hypothesis probability =   2.159280e-01
 
Photon flux (15-150 keV)    in 109.3 sec: 0.140978 ( -0.018595  0.009048 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.45132e-06 ( -9.60419e-08  1.88215e-07 ) ergs/cm2

Band function

Time interval is from   -8.280 sec. to  101.016 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.860812   ( 0.860813   0.860813 )
beta        : -0.998425    ( -0.213564   0.222005 )
Epeak [keV] : 34.6485      ( -34.6484 -34.6484 )
Norm@50keV   : 1.99094E-03    ( -0.000902305   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.08 using 59 PHA bins.
# Reduced chi-squared =          1.165 for     55 degrees of freedom 
# Null hypothesis probability =   1.880625e-01
 
Photon flux (15-150 keV)    in 109.3 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]    : 23.7597  (-3.40271  4.38519)
R^2/D10^2   : 3.96871E-03  (-0.00161134   0.00249971)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.87 using 59 PHA bins.
# Reduced chi-squared =          1.278 for     57 degrees of freedom 
# Null hypothesis probability =   7.663085e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.367e-08   1.089e-08
25- 50  2.412e-07   5.192e-08
50-150  1.015e-06   1.994e-07
15-150  1.300e-06   2.534e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 0.589559       (-0.0715754     0.0715679)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          83.19 using 59 PHA bins.
# Reduced chi-squared =          1.459 for     57 degrees of freedom 
# Null hypothesis probability =   1.340193e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.605e-07   9.039e-08
25- 50  3.088e-07   1.691e-07
50-150  6.772e-07   3.767e-07
15-150  1.146e-06   6.268e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.69555        (-1.30419      2.15613)
R1^2/D10^2  : 1.39664        (-1.23358      14.729)
kT2 [keV]   : 27.2517        (-4.45762      6.52618)
R2^2/D10^2  : 2.48622E-03    (-0.00118451   0.00186708)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.38 using 59 PHA bins.
# Reduced chi-squared =          1.080 for     55 degrees of freedom 
# Null hypothesis probability =   3.191880e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.268e-07   6.367e-08
25- 50  2.245e-07   6.577e-08
50-150  1.071e-06   2.817e-07
15-150  1.422e-06   3.417e-07

Peak spectrum fit

Power-law model

Time interval is from    1.036 sec. to    2.036 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.570049     ( -0.444178   0.394375 )
Norm@50keV  : 6.68617E-03    ( -0.0019029   0.00184873 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.27 using 59 PHA bins.
# Reduced chi-squared =          1.285 for     57 degrees of freedom 
# Null hypothesis probability =   7.213927e-02
 
Photon flux (15-150 keV)    in 1 sec: 0.783512 ( -0.198336  0.202045 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.67633e-08 ( -2.12683e-08  2.13833e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    1.036 sec. to    2.036 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -5.76314     (     )
Epeak [keV] : 85.1771      ( -12.0534 40.2544 )
Norm@50keV  : 0.793973    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.05 using 59 PHA bins.
# Reduced chi-squared =          1.162 for     56 degrees of freedom 
# Null hypothesis probability =   1.907907e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.646077 ( -0.173465  0.205923 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.55138e-08 ( -2.15577e-08  2.37234e-08 ) ergs/cm2

Band function

Time interval is from    1.036 sec. to    2.036 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.29984   ( -0.850046   0.499119 )
beta        : -10.0000    ( 10   3.55271e-15 )
Epeak [keV] : 88.3174      ( -12.2617 39.1044 )
Norm@50keV   : 0.310855    ( -0.309155   0.422548 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.20 using 59 PHA bins.
# Reduced chi-squared =          1.185 for     55 degrees of freedom 
# Null hypothesis probability =   1.633893e-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]    : 28.2136  (-6.25465  10.3886)
R^2/D10^2   : 1.57876E-02  (-0.00938576   0.017819)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.46 using 59 PHA bins.
# Reduced chi-squared =          1.183 for     57 degrees of freedom 
# Null hypothesis probability =   1.618793e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.040e-09   1.146e-09
25- 50  1.226e-08   5.758e-09
50-150  7.042e-08   3.775e-08
15-150  8.472e-08   4.715e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 2.97291       (-0.867465     0.867391)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          88.49 using 59 PHA bins.
# Reduced chi-squared =          1.552 for     57 degrees of freedom 
# Null hypothesis probability =   4.750340e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.401e-09   4.601e-09
25- 50  1.424e-08   8.845e-09
50-150  3.122e-08   1.957e-08
15-150  5.286e-08   3.284e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 0.101956        (-0.101956      7.77295)
R1^2/D10^2  : 5.04525E+12        (-5.05712e+12      -5.05712e+12)
kT2 [keV]   : 28.3481        (-6.25573      10.3874)
R2^2/D10^2  : 1.55378E-02    (-0.00938406   0.0178357)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.46 using 59 PHA bins.
# Reduced chi-squared =          1.227 for     55 degrees of freedom 
# Null hypothesis probability =   1.208204e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.021e-09   3.245e+06
25- 50  1.217e-08   2.757e+07
50-150  7.049e-08   6.715e+08
15-150  8.468e-08   7.025e+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: 0.862905     ( -0.229147   0.216822 )
Norm@50keV  : 1.74630E-03    ( -0.000230597   0.00022735 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.34 using 59 PHA bins.
# Reduced chi-squared =         0.8832 for     57 degrees of freedom 
# Null hypothesis probability =   7.211837e-01
 
Photon flux (15-150 keV)    in 58.19 sec: 0.200432 ( -0.0260307  0.0262019 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.15721e-06 ( -1.49407e-07  1.50133e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -6.80790E-02     ( -1.36644   0.98807 )
Epeak [keV] : 137.268      ( -46.1722 -137.263 )
Norm@50keV  : 4.15178E-03    ( -0.00204431   0.00902579 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.85 using 59 PHA bins.
# Reduced chi-squared =         0.8545 for     56 degrees of freedom 
# Null hypothesis probability =   7.723956e-01
 
Photon flux (15-150 keV)    in 58.19 sec: 0.191504 ( -0.028097  0.028022 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.1161e-06 ( -1.61786e-07  1.59609e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 6.70215E-02   ( -0.920689   1.16836 )
beta        : -10.0000    ( 10   1.06581e-14 )
Epeak [keV] : 137.332      ( -31.9684 356.717 )
Norm@50keV   : 4.14827E-03    ( -0.00245934   0.00902393 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.85 using 59 PHA bins.
# Reduced chi-squared =         0.8701 for     55 degrees of freedom 
# Null hypothesis probability =   7.418314e-01
 
Photon flux (15-150 keV)    in 58.19 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)  = 2.70e-07
S(50-100 keV) = 5.40e-07

T90 vs. Hardness ratio plot

T90                                   = 96.8160000443459 sec.
Hardness ratio (energy fluence ratio) = 2

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.991245
Count Ratio (50-100 keV) / (15-25 keV) = 1.84514

Mask shadow pattern

IMX = 6.836518183555379E-02, IMY = -5.329999211614854E-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:
-239.592000 -8.280000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
196.6204  71.9814    2.7  46.1  139.1   3.2029   4.3 ------	UNKNOWN

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

Time interval of the image:
-8.280000 49.908590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
144.4731  44.2622    0.9  28.3   82.7   1.7514  12.7 ------	UNKNOWN                       
181.6487   1.7540    2.1  27.2  -69.7   0.5959   5.4 ------	UNKNOWN                       
151.2967 -20.5758    2.3  52.7  -24.8   1.3054   5.0 ------	UNKNOWN                       
149.3349 -22.0792    2.1  54.8  -23.6   1.6362   5.5 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
99.708580 720.508620
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
206.3526  76.0735    2.7  40.7  172.9   2.4521   4.2 ------	UNKNOWN                       
145.1234  31.7362    2.7  12.5  -28.8   1.4402   4.2 ------	UNKNOWN

Plot creation:
Wed Jun 10 13:03:10 EDT 2015