batgrbproduct analysis for trigger=684679

batgrbproduct Analysis for Trigger=684679

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  1 15:28:04 EDT 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger684679
======================================================================

  Trigger: 00684679      Segment: 000

  BAT Trigger Time: 483756048   [s; MET]
      Trigger Stop: 483756112   [s; MET]
               UTC: 2016-05-01T00:40:31.797220    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 286.376860952753   Dec: -17.2398515642378  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.34
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    11.34

  Flight Position:   [ source = BAT ]
    RA: 286.376860952753   Dec: -17.2398515642378  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 286.37981860683   Dec: -17.2400939882568  [deg; J2000]  
        { 19h 05m 31.2s , -17d 14' 24.3" }
         +/- 2.05957974755527 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.884931399361301 [arcmin] (formal 1-sigma fit error)
    SNR: 10.8358558531747
 
  Angular difference between Flight and Ground position is 0.170109 arcmin
 
  Partial Coding Fraction: 0.8125    [ including projection effects ]

  Duration
     T90: N/A +/- N/A 
        Measured from: N/A
                   to: N/A     [s; relative to TRIGTIME]
     T50: N/A +/-  N/A
        Measured from: N/A
                   to: N/A     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

======================================================================
 
=== 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 1.72e-07 1.96e-07 1.62e-07 2.25e-07 6.12e-07 7.55e-07   erg/cm2
              Error 2.78e-08 2.55e-08 3.87e-08 1.02e-07 9.09e-08 1.53e-07   erg/cm2
Peak flux Power-law -------- -------- -------- -------- -------- --------   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s
 
Fluence   Cutoff-PL 1.55e-07 2.33e-07 1.32e-07 2.09e-08 5.38e-07 5.40e-07   erg/cm2
              Error 3.17e-08 3.68e-08 5.01e-08 5.14e-08 8.98e-08 1.04e-07   erg/cm2
Peak flux Cutoff-PL -------- -------- -------- -------- -------- --------   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   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    2.278    0.243    -      -           1.00e-03 1.76e-04   44.250 57
CPL   0.638    1.400      31.3    0.0      1.01e-02 0.00e+00   38.570 56
 
 
(1-s peak spectrum is not available)
 
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     N/A      N/A      N/A 
T90      N/A      N/A      N/A   
T50      N/A      N/A      N/A
Peak     N/A      N/A      N/A

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
  286.3798   -17.2401   0.0178    19.5454  -118.4072         1.2420216     10.836 TRIG_00684679                 
 
Foreground time interval of the image:
  0.000  64.000 (delta_t =  64.000 [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)

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    0.000 sec. to   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.27825     ( -0.233464   0.252467 )
Norm@50keV  : 1.00372E-03    ( -0.00017773   0.00017462 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.25 using 59 PHA bins.
# Reduced chi-squared =         0.7763 for     57 degrees of freedom 
# Null hypothesis probability =   8.912930e-01
 
Photon flux (15-150 keV)    in 64 sec: 0.173330 ( -0.021481  0.021487 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.11603e-07 ( -8.96038e-08  9.21331e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.000 sec. to   64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.638093     ( -1.58083   1.21977 )
Epeak [keV] : 31.3174      (   )
Norm@50keV  : 1.00556E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.57 using 59 PHA bins.
# Reduced chi-squared =         0.6888 for     56 degrees of freedom 
# Null hypothesis probability =   9.634552e-01
 
Photon flux (15-150 keV)    in 64 sec: 0.165160 ( -0.021889  0.022021 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.37613e-07 ( -8.35149e-08  9.6023e-08 ) ergs/cm2

Band function

Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.761631   ( -0.830172   2.20905 )
beta        : -4.80799    ( 4.92906   14.3984 )
Epeak [keV] : 30.7473      ( -9.45638 7.46911 )
Norm@50keV   : 8.50111E-03    ( -0.00924103   0.356147 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.59 using 59 PHA bins.
# Reduced chi-squared =         0.7016 for     55 degrees of freedom 
# Null hypothesis probability =   9.544485e-01
 
Photon flux (15-150 keV)    in 64 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]    : 8.69273  (-1.06354  1.19933)
R^2/D10^2   : 0.139254  (-0.0567257   0.0965277)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.52 using 59 PHA bins.
# Reduced chi-squared =         0.7635 for     57 degrees of freedom 
# Null hypothesis probability =   9.057420e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.286e-07   2.672e-08
25- 50  2.587e-07   4.486e-08
50-150  8.865e-08   3.188e-08
15-150  4.760e-07   8.112e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 41.7830       (-10.6572      16.5769)
Norm        : 1.09903       (-0.229876     0.298434)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.40 using 59 PHA bins.
# Reduced chi-squared =         0.6912 for     57 degrees of freedom 
# Null hypothesis probability =   9.635462e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.638e-07   2.640e-08
25- 50  2.196e-07   3.661e-08
50-150  1.780e-07   6.826e-08
15-150  5.614e-07   9.664e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.81754        (-3.32473      12.4374)
R1^2/D10^2  : 1.78004        (-1.58666      -1.78004)
kT2 [keV]   : 10.8299        (-2.28833      8.17147)
R2^2/D10^2  : 4.75722E-02    (-0.0453201   0.0657631)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.18 using 59 PHA bins.
# Reduced chi-squared =         0.6942 for     55 degrees of freedom 
# Null hypothesis probability =   9.589680e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.566e-07   8.026e-08
25- 50  2.320e-07   1.220e-07
50-150  1.351e-07   8.413e-08
15-150  5.238e-07   2.656e-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: 2.27825     ( -0.233464   0.252467 )
Norm@50keV  : 1.00372E-03    ( -0.00017773   0.00017462 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.25 using 59 PHA bins.
# Reduced chi-squared =         0.7763 for     57 degrees of freedom 
# Null hypothesis probability =   8.912930e-01
 
Photon flux (15-150 keV)    in 64 sec: 0.173311 ( -0.021478  0.0214849 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.11478e-07 ( -8.95264e-08  9.2169e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.627731     ( -1.57728   1.22326 )
Epeak [keV] : 31.3584      (   )
Norm@50keV  : 1.02033E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.57 using 59 PHA bins.
# Reduced chi-squared =         0.6888 for     56 degrees of freedom 
# Null hypothesis probability =   9.634554e-01
 
Photon flux (15-150 keV)    in 64 sec: 0.165126 ( -0.021878  0.022008 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.37703e-07 ( -8.35168e-08  9.60826e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.761631   ( -0.830172   2.20905 )
beta        : -4.80799    ( 4.92906   14.3984 )
Epeak [keV] : 30.7473      ( -9.45639 7.46911 )
Norm@50keV   : 8.50111E-03    ( -0.00924103   0.356147 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.59 using 59 PHA bins.
# Reduced chi-squared =         0.7016 for     55 degrees of freedom 
# Null hypothesis probability =   9.544485e-01
 
Photon flux (15-150 keV)    in 64 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)  = 1.96e-07
S(50-100 keV) = 1.62e-07

T90 vs. Hardness ratio plot

T90                                   = N/A sec.
Hardness ratio (energy fluence ratio) = 0.826531

Color vs. Color plot

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

Mask shadow pattern

IMX = -1.688906794539408E-01, IMY = 3.122635234765540E-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:
0.000000 64.000000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9874 -15.6415    0.5  22.6  100.3   2.9108  21.8    0.5	Sco X-1                       
255.9718 -37.8727    0.7  16.1   23.7   1.7589  16.0    1.8	4U 1700-377                   
256.3333 -36.4365    5.1  14.8   26.4   0.2507   2.3    5.0	GX 349+2                      
262.9110 -24.5755    7.5   3.8   83.2   0.1579   1.5   11.5	GX 1+4                        
264.7400 -44.4497   15.9  19.7   -4.5   0.0761   0.7    0.1	4U 1735-44                    
268.2892  -1.5923   10.6  23.2  173.8   0.1176   1.1    9.6	SW J1753.5-0127               
270.2365 -24.9218   38.1   2.9  -96.4   0.0315   0.3    9.8	GX 5-1                        
270.1723 -25.8019    5.5   3.0  -79.3   0.2158   2.1    7.9	GRS 1758-258                  
274.0578 -14.0833    2.7  12.6 -156.5   0.4637   4.3    4.1	GX 17+2                       
276.1142 -30.2322    0.0   9.7  -63.4   0.1405   1.3   12.7	H1820-303                     
285.1688 -24.7990   23.2  16.4  -95.6  -0.0574  -0.5   10.3	HT1900.1-2455                 
288.7228  10.9041    4.1  41.5 -156.2   0.4594   2.8    5.1	GRS 1915+105                  
263.1623 -33.8700    6.5   9.7   10.1  -0.1911  -1.8    8.9	GX 354-0                      
236.5413  -9.2356    2.7  32.9  103.5   0.9075   4.4 ------	UNKNOWN                       
259.7272  29.3054    2.2  54.6  162.8   3.2771   5.1 ------	UNKNOWN                       
286.3798 -17.2401    1.1  19.5 -118.4   1.2419  10.8 ------	UNKNOWN                       
310.6479 -62.1753    2.1  47.3  -35.4   1.3473   5.5 ------	UNKNOWN                       
316.1488 -41.7583    2.7  43.7  -64.1   2.2481   4.2 ------	UNKNOWN                       
312.4230 -25.9241    3.4  40.8  -87.8   1.5842   3.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
117.300600 963.070000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
245.0104 -15.6378    1.2  39.6   95.3  29.0860   9.6    1.8	Sco X-1                       
255.9932 -37.8510    0.7  33.6   55.3  21.6945  16.8    0.5	4U 1700-377                   
256.5742 -36.5708    6.0  32.6   56.9   2.4532   1.9   11.1	GX 349+2                      
262.9992 -24.6068    5.6  23.0   76.6   1.8206   2.1    8.3	GX 1+4                        
264.6337 -44.4538    4.8  32.8   38.4   2.5926   2.4    4.7	4U 1735-44                    
268.2278  -1.5005   11.7  23.8  138.7   0.7852   1.0    8.9	SW J1753.5-0127               
270.1157 -25.0362   16.1  17.0   69.2   0.5048   0.7    9.5	GX 5-1                        
270.2003 -25.7492    3.9  17.2   66.9   2.1441   3.0    5.5	GRS 1758-258                  
274.0115 -14.0440    1.0  12.3  112.5   8.3600  11.7    0.6	GX 17+2                       
276.0247 -30.4737    5.7  16.2   42.8   1.4146   2.0    8.2	H1820-303                     
285.2237 -25.0464    0.0   7.9   16.8   0.9604   1.3   12.7	HT1900.1-2455                 
288.8201  10.9552    1.2  28.3 -165.7   6.7072   9.6    1.4	GRS 1915+105                  
299.5686  35.2125    1.0  53.9 -157.5  26.8991  12.0    1.2	Cyg X-1                       
262.8188 -33.9636    0.0  26.9   56.3   1.6368   1.9   11.5	GX 354-0                      
276.4323   3.4160    3.4  22.9  162.9   2.3703   3.4 ------	UNKNOWN                       
301.7173  38.8723    5.2  57.9 -156.8  11.5174   2.2 ------	UNKNOWN

Plot creation:
Fri Jun  3 15:34:01 EDT 2016