batgrbproduct analysis for trigger=571830

batgrbproduct Analysis for Trigger=571830

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): Sun May 10 03:54:25 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger571830
======================================================================

  Trigger: 00571830      Segment: 000

  BAT Trigger Time: 401775096   [s; MET]
      Trigger Stop: 401775160   [s; MET]
               UTC: 2013-09-25T04:11:24.926960    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 41.1834870565618   Dec: -26.1344446281341  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    23.15
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    23.15

  Flight Position:   [ source = BAT ]
    RA: 41.1834870565618   Dec: -26.1344446281341  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 41.1851660595169   Dec: -26.1463580863318  [deg; J2000]  
        { 02h 44m 44.4s , -26d 08' 46.9" }
         +/- 0.987240952572084 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.291158824595208 [arcmin] (formal 1-sigma fit error)
    SNR: 30.9802765937543
 
  Angular difference between Flight and Ground position is 0.720506 arcmin
 
  Partial Coding Fraction: 0.09960938    [ including projection effects ]

  Duration
     T90: 160.29599994421 +/- 3.39040768844924
        Measured from: -48.8920000195503
                   to: 111.40399992466     [s; relative to TRIGTIME]
     T50: 83.3959999084473 +/- 2.23230823015722
        Measured from: -28.5799999833107
                   to: 54.8159999251366     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -35.6359999775887     
                   to: -34.6359999775887     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -59.0320000052452     
                   to: 903.952000021935     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    25.746554  27.571896  15.137053   2.878093
           0.281395   0.292809   0.246229   0.193475 [error]
 Peak      0.261260   0.274742   0.212050   0.056038
           0.021574   0.022620   0.019639   0.013822 [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 9.38e-06 1.23e-05 1.19e-05 2.04e-05 4.03e-05 5.39e-05   erg/cm2
              Error 3.59e-07 2.63e-07 2.89e-07 1.13e-06 7.48e-07 1.29e-06   erg/cm2
Peak flux Power-law 3.11e+00 2.46e+00 1.31e+00 1.01e+00 7.33e+00 7.89e+00   ph/cm2/s
              Error 4.19e-01 2.10e-01 1.63e-01 2.48e-01 6.36e-01 6.61e-01   ph/cm2/s
 
Fluence   Cutoff-PL 8.90e-06 1.24e-05 1.20e-05 1.58e-05 3.96e-05 4.91e-05   erg/cm2
              Error 4.86e-07 2.77e-07 3.12e-07 2.93e-06 8.94e-07 3.16e-06   erg/cm2
Peak flux Cutoff-PL 3.03e+00 2.49e+00 1.32e+00 8.61e-01 7.28e+00 7.71e+00   ph/cm2/s
              Error 4.88e-01 2.43e-01 1.74e-01 4.01e-01 6.59e-01 8.09e-01   ph/cm2/s
 
Fluence        Band 8.62e-06 1.25e-05 1.18e-05 1.64e-05 3.96e-05 4.99e-05   erg/cm2
              Error -------- -------- -------- -------- 9.29e-07 --------   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    2.053    0.038    -      -           4.52e-03 8.48e-05   43.930 57
CPL   1.847    0.154      39.7   22.8      5.63e-03 9.07e-04   38.500 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.909    0.155    -      -           5.09e-02 4.82e-03   49.970 57
CPL   1.766    0.562      80.6    0.0      6.03e-02 0.00e+00   49.770 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: 133.312000 sec.
T50 in the 50-300 keV band: 63.296000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  962.984  -59.032  903.952
T90   160.296  -48.892  111.404
T50    83.396  -28.580   54.816
Peak    1.000  -35.636  -34.636

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
   41.1852   -26.1464   0.0062    40.7866   123.1865        24.7388090     30.980 TRIG_00571830                 
 
Foreground time interval of the image:
-13.299  72.701 (delta_t =  86.000 [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 64.000000

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 64.000000

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 64.000000

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)

The mask-weighted light curves based on cleaned DPHs

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  -59.032 sec. to  903.952 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.05332     ( -0.0379478   0.0380728 )
Norm@50keV  : 4.52397E-03    ( -8.47953e-05   8.47627e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.93 using 59 PHA bins.
# Reduced chi-squared =         0.7708 for     57 degrees of freedom 
# Null hypothesis probability =   8.976539e-01
 
Photon flux (15-150 keV)    in 963 sec: 0.695776 ( -0.0167715  0.0168909 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.03141e-05 ( -7.48002e-07  7.4798e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -59.032 sec. to  903.952 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.84657     ( -0.157038   0.151857 )
Epeak [keV] : 39.7030      ( -35.0752 10.5571 )
Norm@50keV  : 5.63430E-03    ( -0.000817796   0.000995475 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.50 using 59 PHA bins.
# Reduced chi-squared =         0.6875 for     56 degrees of freedom 
# Null hypothesis probability =   9.642015e-01
 
Photon flux (15-150 keV)    in 963 sec: 0.679238 ( -0.020152  0.020366 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.96416e-05 ( -8.94434e-07  8.93471e-07 ) ergs/cm2

Band function

Time interval is from  -59.032 sec. to  903.952 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.84655   ( -0.102507   0.155474 )
beta        : -10.00000    ( 10   20 )
Epeak [keV] : 39.6985      ( -15.0156 9.05237 )
Norm@50keV   : 5.63295E-03    ( -0.00010447   0.000831788 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.50 using 59 PHA bins.
# Reduced chi-squared =         0.6999 for     55 degrees of freedom 
# Null hypothesis probability =   9.554821e-01
 
Photon flux (15-150 keV)    in 963 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.95538e-05 ( -3.9547e-05  -9.37384e-07 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 13.3290  (  )
R^2/D10^2   : 9.47012E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         704.31 using 59 PHA bins.
# Reduced chi-squared =         12.356 for     57 degrees of freedom 
# Null hypothesis probability =  2.356892e-112
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.434e-06   1.363e-07
25- 50  1.215e-05   3.178e-07
50-150  1.384e-05   4.815e-07
15-150  2.942e-05   5.874e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 80.5345       (-4.7529      5.23391)
Norm        : 3.03654       (-0.109797     0.114538)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.15 using 59 PHA bins.
# Reduced chi-squared =          1.178 for     57 degrees of freedom 
# Null hypothesis probability =   1.681655e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.591e-06   2.422e-07
25- 50  1.252e-05   2.745e-07
50-150  1.775e-05   6.308e-07
15-150  3.785e-05   6.885e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.62038        (-0.418073      0.435756)
R1^2/D10^2  : 1.04987        (-0.23027      0.315592)
kT2 [keV]   : 22.6975        (-1.38734      1.62337)
R2^2/D10^2  : 9.07296E-03    (-0.00223067   0.00271986)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.87 using 59 PHA bins.
# Reduced chi-squared =          1.016 for     55 degrees of freedom 
# Null hypothesis probability =   4.421231e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.514e-06   5.017e-07
25- 50  1.263e-05   3.659e-07
50-150  1.812e-05   7.945e-07
15-150  3.827e-05   1.213e-06

Peak spectrum fit

Power-law model

Time interval is from  -35.636 sec. to  -34.636 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.90913     ( -0.152048   0.158267 )
Norm@50keV  : 5.09016E-02    ( -0.00486028   0.00477799 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.97 using 59 PHA bins.
# Reduced chi-squared =         0.8766 for     57 degrees of freedom 
# Null hypothesis probability =   7.339862e-01
 
Photon flux (15-150 keV)    in 1 sec: 7.33336 ( -0.63529  0.636924 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.68018e-07 ( -4.37014e-08  4.39802e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from  -35.636 sec. to  -34.636 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.76648     ( -0.593998   0.529599 )
Epeak [keV] : 80.6054      (   )
Norm@50keV  : 6.03152E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.77 using 59 PHA bins.
# Reduced chi-squared =         0.8887 for     56 degrees of freedom 
# Null hypothesis probability =   7.084519e-01
 
Photon flux (15-150 keV)    in 1 sec: 7.28466 ( -0.66001  0.65897 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.64565e-07 ( -4.6117e-08  4.599e-08 ) ergs/cm2

Band function

Time interval is from  -35.636 sec. to  -34.636 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.76651   ( 1.67302   0.391653 )
beta        : -10.0000    ( 10   3.55271e-15 )
Epeak [keV] : 80.5847      ( -43.4851 -80.5847 )
Norm@50keV   : 6.03004E-02    ( -0.0140793   0.059771 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.77 using 59 PHA bins.
# Reduced chi-squared =         0.9048 for     55 degrees of freedom 
# Null hypothesis probability =   6.742740e-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]    : 12.6229  (-1.37292  1.50626)
R^2/D10^2   : 1.39735  (-0.478972   0.74681)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          95.15 using 59 PHA bins.
# Reduced chi-squared =          1.669 for     57 degrees of freedom 
# Null hypothesis probability =   1.144460e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.722e-08   7.360e-09
25- 50  1.574e-07   1.840e-08
50-150  1.558e-07   2.780e-08
15-150  3.605e-07   3.745e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 92.4084       (-23.0627      36.8075)
Norm        : 32.5825       (-3.94564     4.64475)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.59 using 59 PHA bins.
# Reduced chi-squared =         0.9050 for     57 degrees of freedom 
# Null hypothesis probability =   6.776442e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.508e-08   1.165e-08
25- 50  1.447e-07   1.330e-08
50-150  2.239e-07   8.490e-08
15-150  4.537e-07   8.585e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.53273        (-1.012      1.21961)
R1^2/D10^2  : 50.0929        (-31.9801      117.314)
kT2 [keV]   : 19.0494        (-2.89987      4.01054)
R2^2/D10^2  : 0.249665    (-0.131949   0.229705)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.74 using 59 PHA bins.
# Reduced chi-squared =         0.8680 for     55 degrees of freedom 
# Null hypothesis probability =   7.457373e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.869e-08   4.690e-08
25- 50  1.269e-07   3.363e-08
50-150  2.298e-07   6.355e-08
15-150  4.553e-07   1.095e-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: 2.14618     ( -0.0580436   0.0586742 )
Norm@50keV  : 1.71162E-02    ( -0.000537057   0.000534873 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.99 using 59 PHA bins.
# Reduced chi-squared =         0.7718 for     57 degrees of freedom 
# Null hypothesis probability =   8.965243e-01
 
Photon flux (15-150 keV)    in 86 sec: 2.75584 ( -0.0922892  0.0928472 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.37441e-05 ( -4.0252e-07  4.02831e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.84736     ( -0.243015   0.17403 )
Epeak [keV] : 24.8790      ( -21.8094 13.0111 )
Norm@50keV  : 2.42065E-02    ( -0.00501296   0.00771146 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.00 using 59 PHA bins.
# Reduced chi-squared =         0.6964 for     56 degrees of freedom 
# Null hypothesis probability =   9.591841e-01
 
Photon flux (15-150 keV)    in 86 sec: 2.68390 ( -0.10549  0.10633 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.34095e-05 ( -4.77128e-07  4.75924e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.36867   ( -0.719753   1.76016 )
beta        : -2.25561    ( 2.25571   0.10347 )
Epeak [keV] : 29.9679      ( -12.842 6.75682 )
Norm@50keV   : 4.94988E-02    ( -0.0308516   1.04669 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.26 using 59 PHA bins.
# Reduced chi-squared =         0.6956 for     55 degrees of freedom 
# Null hypothesis probability =   9.581555e-01
 
Photon flux (15-150 keV)    in 86 sec: 2.68311 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.33749e-05 ( 0  0 ) ergs/cm2

S(25-50 keV) vs. S(50-100 keV) plot

S(25-50 keV)  = 1.23e-05
S(50-100 keV) = 1.19e-05

T90 vs. Hardness ratio plot

T90                                   = 160.29599994421 sec.
Hardness ratio (energy fluence ratio) = 0.96748

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.0709
Count Ratio (50-100 keV) / (15-25 keV) = 0.587925

Mask shadow pattern

IMX = -4.722510683243020E-01, IMY = -7.220460645994012E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

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:
-13.299400 72.700600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 41.1852 -26.1464    0.4  40.8  123.2  24.7382  31.0 ------	UNKNOWN                       
317.0833 -57.7250    2.3  39.9   10.9   1.0885   4.9 ------	UNKNOWN                       
 98.8426 -63.7567    2.7  20.4 -120.1   0.4426   4.3 ------	UNKNOWN                       
230.9158 -62.7054    2.9  50.7  -44.5   2.2333   4.0 ------	UNKNOWN                       
146.6582 -58.1969    2.7  41.1  -98.1   2.5133   4.3 ------	UNKNOWN                       
124.9709 -40.2923    2.6  48.0 -129.1   2.1125   4.5 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
136.100600 963.032900
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 41.1782 -26.1471    0.3   0.0   98.6  16.0190  37.1 ------	UNKNOWN                       
 57.6093   1.8315    2.4  32.2 -177.2   2.1914   4.7 ------	UNKNOWN                       
 15.7950 -56.0738    3.3  35.1   -4.6   1.8538   3.5 ------	UNKNOWN

Plot creation:
Sat May 30 15:32:05 EDT 2015