batgrbproduct analysis for trigger=756284

batgrbproduct Analysis for Trigger=756284

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 21 15:21:57 EDT 2017
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger756284
======================================================================

  Trigger: 00756284      Segment: 000

  BAT Trigger Time: 518570512.896   [s; MET]
      Trigger Stop: 518570513.92   [s; MET]
               UTC: 2017-06-07T23:21:33.713940    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 7.34357806330534   Dec: 9.23797385784254  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    16.32
     Image Trigger?:     NO
     Rate S/N Ratio:     41.821047332653  [ if not an image trigger ]
     Image S/N Ratio:    16.32

  Flight Position:   [ source = BAT ]
    RA: 7.34357806330534   Dec: 9.23797385784254  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 7.35798348835567   Dec: 9.22449023832508  [deg; J2000]  
        { 00h 29m 25.9s , +09d 13' 28.2" }
         +/- 1.01266702398168 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.32009528664773 [arcmin] (formal 1-sigma fit error)
    SNR: 29.875064679646
 
  Angular difference between Flight and Ground position is 1.175731 arcmin
 
  Partial Coding Fraction: 0.5703125    [ including projection effects ]

  Duration
     T90: 320 +/- 172.325273828304
        Measured from: -191.896000027657
                   to: 128.103999972343     [s; relative to TRIGTIME]
     T50: 192 +/- 150.943698112906
        Measured from: -143.896000027657
                   to: 48.1039999723434     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 7.60399997234344     
                   to: 8.60399997234344     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -207.896000027657     
                   to: 144.103999972343     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     3.547108   4.578176   3.260995   0.659440
           0.138965   0.145247   0.127647   0.110512 [error]
 Peak      0.087767   0.127296   0.086378   0.016081
           0.009489   0.010320   0.008786   0.007334 [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 1.18e-06 2.00e-06 2.59e-06 6.79e-06 7.64e-06 1.26e-05   erg/cm2
              Error 8.31e-08 8.17e-08 1.32e-07 7.70e-07 3.12e-07 8.55e-07   erg/cm2
Peak flux Power-law 9.97e-01 9.09e-01 5.73e-01 5.53e-01 2.71e+00 3.03e+00   ph/cm2/s
              Error 1.48e-01 8.57e-02 7.55e-02 1.45e-01 2.52e-01 2.85e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.17e-06 2.01e-06 2.59e-06 6.76e-06 7.60e-06 1.24e-05   erg/cm2
              Error 8.58e-08 8.90e-08 1.24e-07 1.40e-06 3.37e-07 1.70e-06   erg/cm2
Peak flux Cutoff-PL 9.86e-01 9.18e-01 5.75e-01 4.91e-01 2.70e+00 2.97e+00   ph/cm2/s
              Error 1.24e-01 1.00e-01 7.81e-02 -------- 2.56e-01 3.65e-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    1.625    0.072    -      -           2.32e-03 8.95e-05   42.220 57
CPL   1.623    0.178    9996.0    0.0      2.33e-03 4.69e-04   42.220 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.666    0.166    -      -           2.06e-02 2.09e-03   57.950 57
CPL   1.583    0.672     220.1    0.0      2.29e-02 0.00e+00   57.890 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: 234.304000 sec.
T50 in the 50-300 keV band: 214.464000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  352.000 -207.896  144.104
T90   320.000 -191.896  128.104
T50   192.000 -143.896   48.104
Peak    1.000    7.604    8.604

Click here for the BAT GCN circular template

Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minute to calcaulte

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
    7.3580     9.2245   0.0064    28.0316   132.9764         6.2914612     29.875 TRIG_00756284                 
 
Foreground time interval of the image:
-122.995  13.805 (delta_t = 136.800 [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 1.024000

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 1.024000

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 1.024000

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 -207.896 sec. to  144.104 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.62528     ( -0.0721692   0.072468 )
Norm@50keV  : 2.32298E-03    ( -8.958e-05   8.93247e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.22 using 59 PHA bins.
# Reduced chi-squared =         0.7408 for     57 degrees of freedom 
# Null hypothesis probability =   9.280700e-01
 
Photon flux (15-150 keV)    in 352 sec: 0.300910 ( -0.012181  0.01223 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.62576e-06 ( -3.11465e-07  3.12448e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from -207.896 sec. to  144.104 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.62335     ( -0.243878   0.111382 )
Epeak [keV] : 9996.03      ( -9995.7 -9995.7 )
Norm@50keV  : 2.32821E-03    ( -8.9223e-05   0.000848082 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.22 using 59 PHA bins.
# Reduced chi-squared =         0.7540 for     56 degrees of freedom 
# Null hypothesis probability =   9.134945e-01
 
Photon flux (15-150 keV)    in 352 sec: 0.300692 ( -0.013345  0.012407 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.6189e-06 ( -3.55119e-07  3.18581e-07 ) ergs/cm2

Band function

Time interval is from -207.896 sec. to  144.104 sec.
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  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]    : 14.4877  (  )
R^2/D10^2   : 3.57598E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         224.50 using 59 PHA bins.
# Reduced chi-squared =         3.9386 for     57 degrees of freedom 
# Null hypothesis probability =   9.822845e-22
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.559e-07   4.365e-08
25- 50  2.138e-06   1.056e-07
50-150  3.006e-06   2.306e-07
15-150  5.700e-06   2.429e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 179.451       (-34.7772      -179.004)
Norm        : 1.21014       (-0.0520357     0.0574796)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.37 using 59 PHA bins.
# Reduced chi-squared =         0.8136 for     57 degrees of freedom 
# Null hypothesis probability =   8.416296e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.075e-06   6.600e-08
25- 50  2.041e-06   2.072e-07
50-150  4.317e-06   1.281e-06
15-150  7.432e-06   1.452e-06

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.31013        (-0.847887      0.899953)
R1^2/D10^2  : 0.297594        (-0.0971898      0.162458)
kT2 [keV]   : 29.3227        (-4.16412      6.19915)
R2^2/D10^2  : 2.32851E-03    (-0.00110105   0.00169078)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.32 using 59 PHA bins.
# Reduced chi-squared =         0.8239 for     55 degrees of freedom 
# Null hypothesis probability =   8.210034e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.050e-06   1.183e-07
25- 50  2.079e-06   1.734e-07
50-150  4.455e-06   7.836e-07
15-150  7.584e-06   8.096e-07

Peak spectrum fit

Power-law model

Time interval is from    7.604 sec. to    8.604 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.66607     ( -0.163981   0.167266 )
Norm@50keV  : 2.06408E-02    ( -0.00210146   0.00207279 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.95 using 59 PHA bins.
# Reduced chi-squared =          1.017 for     57 degrees of freedom 
# Null hypothesis probability =   4.399693e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.70974 ( -0.25239  0.25253 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.91695e-07 ( -2.06186e-08  2.08691e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    7.604 sec. to    8.604 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.58305     ( -0.627121   0.717751 )
Epeak [keV] : 220.114      (   )
Norm@50keV  : 2.28991E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.89 using 59 PHA bins.
# Reduced chi-squared =          1.034 for     56 degrees of freedom 
# Null hypothesis probability =   4.053505e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.70123 ( -0.25364  0.25808 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.90187e-07 ( -2.31049e-08  2.20201e-08 ) ergs/cm2

Band function

Time interval is from    7.604 sec. to    8.604 sec.
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  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]    : 11.9112  (-1.48229  1.78556)
R^2/D10^2   : 0.668293  (-0.266583   0.421582)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          93.68 using 59 PHA bins.
# Reduced chi-squared =          1.644 for     57 degrees of freedom 
# Null hypothesis probability =   1.582049e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.004e-08   3.445e-09
25- 50  6.252e-08   7.715e-09
50-150  5.307e-08   1.159e-08
15-150  1.356e-07   1.505e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 148.970       (-54.113      -147.594)
Norm        : 11.1444       (-1.14883     1.4665)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.58 using 59 PHA bins.
# Reduced chi-squared =          1.028 for     57 degrees of freedom 
# Null hypothesis probability =   4.170765e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.864e-08   5.515e-09
25- 50  5.303e-08   1.581e-08
50-150  1.044e-07   5.448e-08
15-150  1.861e-07   7.243e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.95577        (-1.28661      1.40901)
R1^2/D10^2  : 3.55794        (-1.69016      3.83085)
kT2 [keV]   : 30.1867        (-7.96036      16.7878)
R2^2/D10^2  : 1.86783E-02    (-0.0137519   0.0354152)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.06 using 59 PHA bins.
# Reduced chi-squared =         0.9828 for     55 degrees of freedom 
# Null hypothesis probability =   5.107034e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.013e-08   9.945e-09
25- 50  5.357e-08   1.602e-08
50-150  1.114e-07   5.735e-08
15-150  1.950e-07   7.053e-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: 1.46504     ( -0.0881133   0.0881966 )
Norm@50keV  : 3.07804E-03    ( -0.000148099   0.000147811 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.29 using 59 PHA bins.
# Reduced chi-squared =         0.7419 for     57 degrees of freedom 
# Null hypothesis probability =   9.270420e-01
 
Photon flux (15-150 keV)    in 136.8 sec: 0.380761 ( -0.0189562  0.0190087 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.01845e-06 ( -2.11485e-07  2.12404e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.38174     ( -0.335087   0.162168 )
Epeak [keV] : 384.874      ( -384.874 -384.874 )
Norm@50keV  : 3.38020E-03    ( -0.00043435   0.00149246 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.09 using 59 PHA bins.
# Reduced chi-squared =         0.7516 for     56 degrees of freedom 
# Null hypothesis probability =   9.158703e-01
 
Photon flux (15-150 keV)    in 136.8 sec: 0.378884 ( -0.020142  0.020068 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.99429e-06 ( -2.2992e-07  2.29619e-07 ) ergs/cm2

Band function

 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  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)  = 2.00e-06
S(50-100 keV) = 2.59e-06

T90 vs. Hardness ratio plot

T90                                   = 320 sec.
Hardness ratio (energy fluence ratio) = 1.295

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.29068
Count Ratio (50-100 keV) / (15-25 keV) = 0.919339

Mask shadow pattern

IMX = -3.629465970071011E-01, IMY = -3.895343691985889E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

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:
-122.995400 13.804600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
357.3081  15.8868    1.8  39.6  137.9   2.3065   6.3 ------	UNKNOWN                       
357.4795  25.7640    2.4  43.9  151.3   1.9051   4.8 ------	UNKNOWN                       
  7.3580   9.2245    0.4  28.0  133.0   6.2906  29.9 ------	UNKNOWN                       
 13.4773  25.3928    2.3  32.7  166.2   1.1081   5.0 ------	UNKNOWN                       
  2.0004  49.8441    1.9  57.4  177.7   6.0188   6.0 ------	UNKNOWN                       
 63.4691 -51.7358    3.5  56.8   -0.2   2.6704   3.3 ------	UNKNOWN                       
 69.5285 -23.8268    2.6  41.7  -32.3   1.2838   4.4 ------	UNKNOWN                       
 73.3284   4.4960    3.5  40.0  -76.6   2.2105   3.3 ------	UNKNOWN                       
 77.1245  -3.6513    3.4  43.5  -64.2   2.5482   3.4 ------	UNKNOWN                       
 61.9377  39.6879    3.0  48.1 -129.2   3.4264   3.9 ------	UNKNOWN                       
 62.7977  37.9781    2.8  47.2 -127.0   3.6046   4.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
62.404590 836.886000
900.104000 962.157600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.2369  38.2280    7.0  46.9  156.1   2.6455   1.7    6.4	Cyg X-2                       
 13.5503 -13.5443    3.3  23.6    6.0   1.7877   3.5 ------	UNKNOWN                       
 29.5390 -40.4280    2.5  53.7    0.3   6.9802   4.6 ------	UNKNOWN                       
 15.4297  -2.3488    2.7  14.1  -14.0   2.0825   4.2 ------	UNKNOWN                       
 40.8430  48.1001    3.0  48.0 -129.1  10.9304   3.8 ------	UNKNOWN                       
 46.9500  26.2135    4.9  41.1  -98.4   6.5090   2.4 ------	UNKNOWN                       
 52.4685  -4.2975    3.4  46.9  -54.0   9.6062   3.4 ------	UNKNOWN

Plot creation:
Thu Jun 22 11:31:05 EDT 2017