batgrbproduct analysis for trigger=844192

batgrbproduct Analysis for Trigger=844192

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): Mon Aug  6 18:52:00 EDT 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger844192
======================================================================

  Trigger: 00844192      Segment: 000

  BAT Trigger Time: 551541001.536   [s; MET]
      Trigger Stop: 551541009.728   [s; MET]
               UTC: 2018-06-24T13:49:40.378860    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 318.071401165986   Dec: -2.33235276584909  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.04
     Image Trigger?:     NO
     Rate S/N Ratio:     11.0453610171873  [ if not an image trigger ]
     Image S/N Ratio:    11.04

  Flight Position:   [ source = BAT ]
    RA: 318.071401165986   Dec: -2.33235276584909  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 318.095463458227   Dec: -2.35550144814663  [deg; J2000]  
        { 21h 12m 22.9s , -02d 21' 19.8" }
         +/- 1.30918314427063 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.450581763197892 [arcmin] (formal 1-sigma fit error)
    SNR: 20.7002191878854
 
  Angular difference between Flight and Ground position is 2.002497 arcmin
 
  Partial Coding Fraction: 0.4765625    [ including projection effects ]

  Duration
     T90: 466.651999950409 +/- 35.756255947022
        Measured from: -43.3320000171661
                   to: 423.319999933243     [s; relative to TRIGTIME]
     T50: 325.675999879837 +/- 9.27761803203222
        Measured from: 7.45200002193451
                   to: 333.127999901772     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 6.01600003242493     
                   to: 7.01600003242493     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -61.5479999780655     
                   to: 487.603999972343     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     3.442984   3.948373   2.118930   0.661762
           0.149105   0.154384   0.134741   0.118060 [error]
 Peak      0.054649   0.064581   0.035721   0.010750
           0.008783   0.009308   0.007857   0.006301 [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 1.09e-06 1.60e-06 1.74e-06 3.54e-06 5.49e-06 7.96e-06   erg/cm2
              Error 8.83e-08 7.78e-08 1.35e-07 5.80e-07 3.05e-07 6.96e-07   erg/cm2
Peak flux Power-law 5.74e-01 4.64e-01 2.53e-01 2.03e-01 1.38e+00 1.49e+00   ph/cm2/s
              Error 1.38e-01 7.52e-02 6.65e-02 1.03e-01 2.25e-01 2.47e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.10e-06 1.59e-06 1.54e-06 3.66e-06 5.18e-06 7.85e-06   erg/cm2
              Error 9.42e-08 8.49e-08 1.20e-07 8.83e-07 3.87e-07 5.56e-07   erg/cm2
Peak flux Cutoff-PL 5.75e-01 4.63e-01 2.53e-01 2.08e-01 1.38e+00 1.50e+00   ph/cm2/s
              Error 1.40e-01 7.87e-02 6.75e-02 -------- 2.26e-01 2.70e-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    1.877    0.097    -      -           1.09e-03 6.04e-05   45.770 57
CPL   1.878    0.097    9999.4   -0.0      1.09e-03 2.75e-04   45.770 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.873    0.306    -      -           9.74e-03 1.94e-03   44.890 57
CPL   1.875    0.308    9999.3    0.0      9.73e-03 0.00e+00   44.890 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: 463.168000 sec.
T50 in the 50-300 keV band: 304.384000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  549.152  -61.548  487.604
T90   466.652  -43.332  423.320
T50   325.676    7.452  333.128
Peak    1.000    6.016    7.016

Click here for the BAT GCN circular template

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
  318.0955    -2.3555   0.0093    28.6195   124.2195         4.4661499     20.700 TRIG_00844192                 
 
Foreground time interval of the image:
-61.548  49.765 (delta_t = 111.313 [sec])
Background time interval of the image:
-330.635 -315.316 (delta_t =  15.319 [sec])
-239.536 -61.548 (delta_t = 177.988 [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  -61.548 sec. to  487.604 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.87700     ( -0.0961939   0.09772 )
Norm@50keV  : 1.09229E-03    ( -6.07281e-05   6.01373e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.77 using 59 PHA bins.
# Reduced chi-squared =         0.8029 for     57 degrees of freedom 
# Null hypothesis probability =   8.569737e-01
 
Photon flux (15-150 keV)    in 549.2 sec: 0.155256 ( -0.007785  0.007805 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.51556e-06 ( -3.04087e-07  3.06685e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -61.548 sec. to  487.604 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.87809     ( -0.0978196   0.0970581 )
Epeak [keV] : 9999.36      ( -9999.35 -9999.36 )
Norm@50keV  : 1.09197E-03    ( -6.06906e-05   0.000490102 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.77 using 59 PHA bins.
# Reduced chi-squared =         0.8173 for     56 degrees of freedom 
# Null hypothesis probability =   8.336338e-01
 
Photon flux (15-150 keV)    in 549.2 sec: 0.155515 ( -0.008541  0.007849 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.17846e-06 ( -4.27177e-07  3.46648e-07 ) ergs/cm2

Band function

Time interval is from  -61.548 sec. to  487.604 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]    : 10.9001  (  )
R^2/D10^2   : 4.98168E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         153.61 using 59 PHA bins.
# Reduced chi-squared =         2.6949 for     57 degrees of freedom 
# Null hypothesis probability =   8.346003e-11
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.779e-07   6.371e-08
25- 50  1.894e-06   9.941e-08
50-150  1.263e-06   1.686e-07
15-150  3.835e-06   2.243e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 89.7912       (-15.7205      21.6632)
Norm        : 0.690744       (-0.0535463     0.0604849)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.14 using 59 PHA bins.
# Reduced chi-squared =         0.9323 for     57 degrees of freedom 
# Null hypothesis probability =   6.206767e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.898e-07   8.485e-08
25- 50  1.673e-06   8.595e-08
50-150  2.544e-06   7.387e-07
15-150  5.207e-06   7.348e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.13780        (-0.883435      0.900219)
R1^2/D10^2  : 0.198968        (-0.0671094      0.118291)
kT2 [keV]   : 31.5772        (-7.60961      15.1724)
R2^2/D10^2  : 7.44963E-04    (-0.000504978   0.00116866)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.38 using 59 PHA bins.
# Reduced chi-squared =         0.8433 for     55 degrees of freedom 
# Null hypothesis probability =   7.894446e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.741e-07   1.285e-07
25- 50  1.686e-06   1.977e-07
50-150  2.912e-06   9.627e-07
15-150  5.573e-06   1.332e-06

Peak spectrum fit

Power-law model

Time interval is from    6.016 sec. to    7.016 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.87278     ( -0.292862   0.319117 )
Norm@50keV  : 9.74355E-03    ( -0.00197756   0.00189443 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.89 using 59 PHA bins.
# Reduced chi-squared =         0.7876 for     57 degrees of freedom 
# Null hypothesis probability =   8.774252e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.38250 ( -0.22457  0.22461 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.9588e-08 ( -1.75552e-08  1.79669e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    6.016 sec. to    7.016 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.87513     ( -0.29643   0.318816 )
Epeak [keV] : 9999.33      (   )
Norm@50keV  : 9.73387E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.89 using 59 PHA bins.
# Reduced chi-squared =         0.8017 for     56 degrees of freedom 
# Null hypothesis probability =   8.563413e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.38332 ( -0.22771  0.2243 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.97594e-08 ( -1.95314e-08  1.50451e-08 ) ergs/cm2

Band function

Time interval is from    6.016 sec. to    7.016 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]    : 10.3805  (-2.08362  2.65175)
R^2/D10^2   : 0.555694  (-0.31775   0.727891)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.94 using 59 PHA bins.
# Reduced chi-squared =         0.9990 for     57 degrees of freedom 
# Null hypothesis probability =   4.771468e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.234e-08   3.835e-09
25- 50  3.231e-08   8.310e-09
50-150  1.877e-08   7.873e-09
15-150  6.341e-08   1.786e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 89.1164       (-39.0415      110.224)
Norm        : 6.27992       (-1.34879     1.84435)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.68 using 59 PHA bins.
# Reduced chi-squared =         0.8013 for     57 degrees of freedom 
# Null hypothesis probability =   8.592101e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.638e-08   3.940e-09
25- 50  2.765e-08   6.225e-09
50-150  4.184e-08   2.645e-08
15-150  8.587e-08   3.501e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.63392        (-2.2908      3.04224)
R1^2/D10^2  : 4.11491        (-3.15365      30.5386)
kT2 [keV]   : 22.9539        (-9.25063      43.6549)
R2^2/D10^2  : 2.20034E-02    (-0.0206792   0.135533)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.50 using 59 PHA bins.
# Reduced chi-squared =         0.8272 for     55 degrees of freedom 
# Null hypothesis probability =   8.158721e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.787e-08   1.069e-08
25- 50  2.506e-08   1.305e-08
50-150  4.582e-08   2.619e-08
15-150  8.874e-08   4.623e-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: 1.73075     ( -0.124689   0.12678 )
Norm@50keV  : 2.50373E-03    ( -0.000174532   0.000172431 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.49 using 59 PHA bins.
# Reduced chi-squared =          1.202 for     57 degrees of freedom 
# Null hypothesis probability =   1.416966e-01
 
Photon flux (15-150 keV)    in 111.3 sec: 0.336176 ( -0.0218655  0.0219275 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.57437e-06 ( -1.87226e-07  1.88823e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.74086     (     )
Epeak [keV] : 9999.34      (   )
Norm@50keV  : 2.48964E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.55 using 59 PHA bins.
# Reduced chi-squared =          1.224 for     56 degrees of freedom 
# Null hypothesis probability =   1.211815e-01
 
Photon flux (15-150 keV)    in 111.3 sec: 0.336033 ( -0.02188  0.021899 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.57034e-06 ( -1.80718e-07  1.92972e-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)  = 1.60e-06
S(50-100 keV) = 1.74e-06

T90 vs. Hardness ratio plot

T90                                   = 466.651999950409 sec.
Hardness ratio (energy fluence ratio) = 1.0875

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.14679
Count Ratio (50-100 keV) / (15-25 keV) = 0.615434

Mask shadow pattern

IMX = -3.068594089460298E-01, IMY = -4.511997142804530E-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:
-330.635400 -315.316000
-239.536000 -61.548000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.1202  38.4327    3.2  47.5 -172.1  -1.3659  -3.7    7.1	Cyg X-2                       
341.4981 -46.9783    2.1  42.1   35.0   1.9051   5.5 ------	UNKNOWN                       
320.3752  47.8340    2.4  57.7 -170.8   5.2113   4.9 ------	UNKNOWN                       
 35.2136 -37.9701    2.3  55.0  -16.4   2.7588   5.1 ------	UNKNOWN

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

Time interval of the image:
-61.548000 49.764620
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.2396  38.3639    8.7  47.4 -172.0   0.3967   1.3    4.1	Cyg X-2                       
318.0955  -2.3555    0.6  28.6  124.2   4.4663  20.7 ------	UNKNOWN                       
352.4649   7.8361    2.3  14.2 -126.0   0.7094   5.1 ------	UNKNOWN                       
 34.7022 -26.5013    1.9  50.5  -29.7   2.2985   6.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
98.964600 656.364590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
285.0332 -24.8705   14.7  39.0   81.8  -1.3918  -0.8    3.0	HT1900.1-2455                 
288.8012  10.9171    2.0  32.0  145.0   4.0525   5.9    1.7	GRS 1915+105                  
299.5930  35.2152    1.8  41.4 -173.1   4.6990   6.4    0.8	Cyg X-1                       
308.0629  40.9696    2.7  44.3 -160.9   3.6564   4.2    2.4	Cyg X-3                       
326.2184  38.3489    6.1  41.4 -140.4  -1.5994  -1.9    2.7	Cyg X-2                       
275.0811   7.1951    2.0  44.0  132.9  10.8427   5.8 ------	UNKNOWN                       
285.4550   0.6479    2.2  32.8  124.8   3.9372   5.3 ------	UNKNOWN                       
318.0850  -2.3520    0.9   0.0   59.7   5.5505  12.9 ------	UNKNOWN                       
  2.0139 -39.1319    3.9  54.3  -11.5   4.0324   3.0 ------	UNKNOWN                       
  0.0619 -37.2831    4.8  52.0  -12.5   2.7427   2.4 ------	UNKNOWN                       
358.5598 -28.1833    2.4  46.4  -22.1   3.9917   4.8 ------	UNKNOWN                       
338.9659  41.8049    2.4  48.0 -129.1  11.7840   4.8 ------	UNKNOWN                       
336.3897  44.6758    2.9  49.8 -133.0   9.5286   3.9 ------	UNKNOWN

Plot creation:
Mon Aug  6 22:41:00 EDT 2018