batgrbproduct analysis for trigger=855434

batgrbproduct Analysis for Trigger=855434

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): Fri Oct 19 18:29:40 EDT 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger855434
======================================================================

  Trigger: 00855434      Segment: 000

  BAT Trigger Time: 556743894.464   [s; MET]
      Trigger Stop: 556743896.512   [s; MET]
               UTC: 2018-08-23T19:04:32.988300    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 210.349060652558   Dec: 14.8842385340093  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.89
     Image Trigger?:     NO
     Rate S/N Ratio:     11.7473401244707  [ if not an image trigger ]
     Image S/N Ratio:    8.89

  Flight Position:   [ source = BAT ]
    RA: 210.349060652558   Dec: 14.8842385340093  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 210.358088177704   Dec: 14.90088367325  [deg; J2000]  
        { 14h 01m 25.9s , +14d 54' 03.2" }
         +/- 0.810258969368269 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.165745393539818 [arcmin] (formal 1-sigma fit error)
    SNR: 41.0823937798566
 
  Angular difference between Flight and Ground position is 1.127575 arcmin
 
  Partial Coding Fraction: 0.9296875    [ including projection effects ]

  Duration
     T90: 80.2960000038147 +/- 6.89302403001873
        Measured from: -29.2680000066757
                   to: 51.027999997139     [s; relative to TRIGTIME]
     T50: 30.8960000276566 +/- 1.70345995600386
        Measured from: -8.86000001430511
                   to: 22.0360000133514     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 18.3320000171661     
                   to: 19.3320000171661     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -37.5319999456406     
                   to: 72.0479999780655     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     3.468258   4.914412   3.423441   0.853641
           0.087758   0.095974   0.085352   0.081318 [error]
 Peak      0.075860   0.104922   0.086222   0.030674
           0.008910   0.009947   0.009027   0.007979 [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 1.14e-06 2.01e-06 2.70e-06 7.44e-06 7.83e-06 1.33e-05   erg/cm2
              Error 5.86e-08 5.87e-08 9.10e-08 5.76e-07 2.18e-07 6.27e-07   erg/cm2
Peak flux Power-law 7.01e-01 7.56e-01 5.80e-01 7.28e-01 2.31e+00 2.77e+00   ph/cm2/s
              Error 1.21e-01 8.12e-02 7.44e-02 1.91e-01 2.33e-01 2.92e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.08e-06 2.04e-06 2.73e-06 5.22e-06 7.66e-06 1.11e-05   erg/cm2
              Error 7.49e-08 6.52e-08 9.79e-08 1.49e-06 2.55e-07 1.51e-06   erg/cm2
Peak flux Cutoff-PL 6.56e-01 7.89e-01 5.98e-01 4.40e-01 2.27e+00 2.48e+00   ph/cm2/s
              Error 1.41e-01 9.90e-02 8.21e-02 2.95e-01 2.42e-01 4.04e-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    1.572    0.051    -      -           7.60e-03 1.99e-04   67.430 57
CPL   1.324    0.208     142.3  193.0      9.98e-03 2.25e-03   63.040 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.383    0.173    -      -           1.91e-02 1.96e-03   50.580 57
CPL   0.968    0.661     121.7    0.0      3.12e-02 0.00e+00   49.480 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: 44.032000 sec.
T50 in the 50-300 keV band: 23.744000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  109.580  -37.532   72.048
T90    80.296  -29.268   51.028
T50    30.896   -8.860   22.036
Peak    1.000   18.332   19.332

Click here for the BAT GCN circular template

Special notes of this burst

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

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  210.3581    14.9009   0.0047    25.0407   -24.3273        10.2429220     41.082 TRIG_00855434                 
 
Foreground time interval of the image:
-37.532  28.837 (delta_t =  66.369 [sec])
Background time interval of the image:
-60.464 -37.532 (delta_t =  22.932 [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

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

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 2.048000

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 2.048000

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  -37.532 sec. to   72.048 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.57218     ( -0.0506632   0.0507197 )
Norm@50keV  : 7.60179E-03    ( -0.000199154   0.000199078 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.43 using 59 PHA bins.
# Reduced chi-squared =          1.183 for     57 degrees of freedom 
# Null hypothesis probability =   1.623846e-01
 
Photon flux (15-150 keV)    in 109.6 sec: 0.968663 ( -0.027673  0.027758 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.82043e-06 ( -2.17334e-07  2.17986e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -37.532 sec. to   72.048 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.32359     ( -0.213145   0.203136 )
Epeak [keV] : 142.290      ( -42.4741 343.555 )
Norm@50keV  : 9.98325E-03    ( -0.00194654   0.00256162 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.04 using 59 PHA bins.
# Reduced chi-squared =          1.126 for     56 degrees of freedom 
# Null hypothesis probability =   2.413758e-01
 
Photon flux (15-150 keV)    in 109.6 sec: 0.950201 ( -0.031175  0.031283 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.6565e-06 ( -2.5533e-07  2.543e-07 ) ergs/cm2

Band function

Time interval is from  -37.532 sec. to   72.048 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]    : 15.2557  (  )
R^2/D10^2   : 9.73678E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         334.25 using 59 PHA bins.
# Reduced chi-squared =         5.8640 for     57 degrees of freedom 
# Null hypothesis probability =   7.444154e-41
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.185e-07   2.987e-08
25- 50  2.092e-06   7.617e-08
50-150  3.338e-06   1.584e-07
15-150  5.949e-06   1.732e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-26.342      -200)
Norm        : 3.89811       (-0.10132     0.10132)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.07 using 59 PHA bins.
# Reduced chi-squared =          1.107 for     57 degrees of freedom 
# Null hypothesis probability =   2.703137e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.065e-06   3.272e-08
25- 50  2.048e-06   5.973e-08
50-150  4.490e-06   1.354e-07
15-150  7.602e-06   2.039e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.83580        (-0.775284      0.818172)
R1^2/D10^2  : 0.685901        (-0.185057      0.281948)
kT2 [keV]   : 28.3719        (-3.22101      4.52825)
R2^2/D10^2  : 8.42499E-03    (-0.00339804   0.00468388)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.13 using 59 PHA bins.
# Reduced chi-squared =          1.221 for     55 degrees of freedom 
# Null hypothesis probability =   1.263565e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.418e-07   7.902e-08
25- 50  2.111e-06   1.321e-07
50-150  4.541e-06   4.247e-07
15-150  7.594e-06   5.343e-07

Peak spectrum fit

Power-law model

Time interval is from   18.332 sec. to   19.332 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.38251     ( -0.173055   0.173647 )
Norm@50keV  : 1.90590E-02    ( -0.00196035   0.00195085 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.58 using 59 PHA bins.
# Reduced chi-squared =         0.8875 for     57 degrees of freedom 
# Null hypothesis probability =   7.128979e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.31203 ( -0.23325  0.23339 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.84854e-07 ( -2.13757e-08  2.16412e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   18.332 sec. to   19.332 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.967915     ( -0.77994   0.541339 )
Epeak [keV] : 121.704      (   )
Norm@50keV  : 3.12301E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.48 using 59 PHA bins.
# Reduced chi-squared =         0.8836 for     56 degrees of freedom 
# Null hypothesis probability =   7.183434e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.27308 ( -0.24241  0.24176 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.78057e-07 ( -2.42238e-08  2.42123e-08 ) ergs/cm2

Band function

Time interval is from   18.332 sec. to   19.332 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]    : 15.1918  (-1.8805  2.22126)
R^2/D10^2   : 0.256984  (-0.0966654   0.149312)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.61 using 59 PHA bins.
# Reduced chi-squared =          1.186 for     57 degrees of freedom 
# Null hypothesis probability =   1.588133e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.239e-08   2.419e-09
25- 50  4.981e-08   7.220e-09
50-150  7.867e-08   1.555e-08
15-150  1.409e-07   1.840e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-47.5033      -200)
Norm        : 9.44959       (-0.950565     0.950565)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.89 using 59 PHA bins.
# Reduced chi-squared =         0.9103 for     57 degrees of freedom 
# Null hypothesis probability =   6.666741e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.364e-08   1.293e-08
25- 50  4.548e-08   2.474e-08
50-150  9.974e-08   5.428e-08
15-150  1.689e-07   7.436e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.64656        (-2.62541      3.28388)
R1^2/D10^2  : 1.64418        (-1.04512      4.80207)
kT2 [keV]   : 27.6063        (-8.15399      36.4425)
R2^2/D10^2  : 2.58167E-02    (-0.0237013   0.068286)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.23 using 59 PHA bins.
# Reduced chi-squared =         0.8951 for     55 degrees of freedom 
# Null hypothesis probability =   6.937109e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.001e-08   1.049e-08
25- 50  4.635e-08   2.243e-08
50-150  1.127e-07   5.858e-08
15-150  1.790e-07   8.367e-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: 1.53207     ( -0.0508378   0.0508828 )
Norm@50keV  : 1.04177E-02    ( -0.000272457   0.000272392 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.10 using 59 PHA bins.
# Reduced chi-squared =         0.9315 for     57 degrees of freedom 
# Null hypothesis probability =   6.222932e-01
 
Photon flux (15-150 keV)    in 66.37 sec: 1.31208 ( -0.0375078  0.0376189 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.52628e-06 ( -1.81996e-07  1.82369e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.34933     ( -0.209134   0.19686 )
Epeak [keV] : 188.902      ( -73.1104 -188.91 )
Norm@50keV  : 1.26992E-02    ( -0.00232335   0.0031412 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.67 using 59 PHA bins.
# Reduced chi-squared =         0.9048 for     56 degrees of freedom 
# Null hypothesis probability =   6.761210e-01
 
Photon flux (15-150 keV)    in 66.37 sec: 1.29352 ( -0.04216  0.04231 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.43198e-06 ( -2.11196e-07  2.10194e-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)  = 2.01e-06
S(50-100 keV) = 2.70e-06

T90 vs. Hardness ratio plot

T90                                   = 80.2960000038147 sec.
Hardness ratio (energy fluence ratio) = 1.34328

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.41697
Count Ratio (50-100 keV) / (15-25 keV) = 0.987078

Mask shadow pattern

IMX = 4.256915177736341E-01, IMY = 1.924508996885837E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

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:
-60.464000 -37.532000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
186.3238 -62.8269    8.7  56.3  176.6  -0.5642  -1.5    9.7	GX 301-2                      
245.0051 -15.6525    3.0  31.5   86.0   0.4302   3.9    1.7	Sco X-1                       
162.5914 -42.6604    2.5  54.8 -153.7   1.0009   4.6 ------	UNKNOWN

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

Time interval of the image:
-37.532000 28.836600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
186.7035 -62.8782    8.3  56.2  176.4   2.5221   1.4    6.6	GX 301-2                      
244.9212 -15.6520    3.5  31.4   86.0   1.7452   3.4    3.4	Sco X-1                       
210.3581  14.9009    0.3  25.0  -24.3  10.2427  41.1 ------	UNKNOWN                       
204.0304  44.0663    2.6  54.7  -25.9   3.4525   4.5 ------	UNKNOWN                       
164.7383 -22.4915    3.4  48.0 -129.1   3.3197   3.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
78.436600 415.736600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.2914  35.2842   61.7  44.2   50.7  -0.2957  -0.2    8.9	Her X-1                       
247.6020  51.3978    3.1  47.1   27.5   3.9870   3.7 ------	UNKNOWN                       
218.4324   8.0068    3.8  10.5  126.5   1.1308   3.1 ------	UNKNOWN                       
178.8836  11.4220    3.5  30.8  -96.2   1.8990   3.3 ------	UNKNOWN                       
171.7530 -14.2136    2.3  48.0 -129.1   9.3512   5.1 ------	UNKNOWN                       
168.9399   8.1133    6.5  41.1  -98.3   3.1200   1.8 ------	UNKNOWN

Plot creation:
Fri Oct 26 12:32:12 EDT 2018