GRB180113A: Summary Image Light curves Spectra Distribution Others

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: Fri Feb  2 15:59:35 EST 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger804999
======================================================================

  Trigger: 00804999      Segment: 000

  BAT Trigger Time: 537504446.976   [s; MET]
      Trigger Stop: 537504448   [s; MET]
               UTC: 2018-01-13T02:47:06.667980    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 19.2146943402261   Dec: 68.6820023929715  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    20.3
     Image Trigger?:     NO
     Rate S/N Ratio:     87.5499857224432  [ if not an image trigger ]
     Image S/N Ratio:    20.3

  Analysis Position:   [ source = BAT ]
    RA: 19.2146943402261   Dec: 68.6820023929715  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 19.2114246430205   Dec: 68.6825733151452  [deg; J2000]  
        { 01h 16m 50.7s , +68d 40' 57.3" }
         +/- 0.870217966826981 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.302637396025223 [arcmin] (formal 1-sigma fit error)
    SNR: 37.0991559545173
 
  Angular difference between the analysis and refined position is 0.079120 arcmin
 
  Partial Coding Fraction: 0.7578125    [ including projection effects ]

  Duration
     T90: 64 +/- 16
        Measured from: -12.9759999513626
                   to: 51.0240000486374     [s; relative to TRIGTIME]
     T50: 16 +/- 16
        Measured from: -12.9759999513626
                   to: 3.02400004863739     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 10.5240000486374     
                   to: 11.5240000486374     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -12.9759999513626     
                   to: 67.0240000486374     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.331644   2.263768   2.361160   0.762951
           0.061247   0.064738   0.057859   0.049838 [error]
 Peak      0.053595   0.101363   0.126676   0.038238
           0.007417   0.008451   0.008235   0.006290 [error]

     [ fluence units of on-axis counts / fully illuminated detector ] 

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   80.000  -12.976   67.024
T90    64.000  -12.976   51.024
T50    16.000  -12.976    3.024
Peak    1.000   10.524   11.524
 
 
====== Spectral Analysis Summary =====================================
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^{Ph_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 both the PL model and CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedo
 
=== Time-averaged spectral analysis ===
(Best model with acceptable fit: N/A)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -1.085    -0.057      0.057       -           -               -         5.76e-03     -1.78e-04          1.77e-04      78.020   57
CPL     -0.962    -0.167      0.229      513.518    -513.518      -513.518      6.47e-03     -8.08e-04          1.53e-03      77.110   56
 
 
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: PL)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -0.967     -0.131     0.134       -           -               -         2.17e-02     -1.72e-03          1.71e-03      69.010   57
CPL     -0.322     -0.546     0.635      151.417     -47.743       426.425      4.18e-02     -1.74e-02          3.51e-02      64.850   56
 
 
=== 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         PL   3.99e-07  9.47e-07  1.79e-06  8.17e-06  4.84e-06  1.13e-05   erg/cm2
      90%_error_low -2.68e-08 -3.74e-08 -5.81e-08 -6.28e-07 -1.51e-07 -6.48e-07   erg/cm2
      90%_error_hi   2.75e-08  3.73e-08  5.80e-08  6.66e-07  1.52e-07  6.81e-07   erg/cm2
Peak flux       PL   5.38e-01  7.45e-01  7.62e-01  1.42e+00  2.50e+00  3.47e+00   ph/cm2/s
      90%_error_low -8.37e-02 -7.37e-02 -6.37e-02 -2.38e-01 -2.00e-01 -2.95e-01   ph/cm2/s
      90%_error_hi   8.85e-02  7.30e-02  6.33e-02  2.67e-01  2.00e-01  3.02e-01   ph/cm2/s
 
Fluence        CPL   3.85e-07  9.51e-07  1.81e-06  7.02e-06  4.81e-06  1.02e-05   erg/cm2
      90%_error_low -3.61e-08 -3.83e-08 -7.08e-08 -1.64e-06 -1.60e-07 -1.63e-06   erg/cm2
      90%_error_hi   3.15e-08  3.84e-08  7.16e-08  1.30e-06  1.58e-07  1.57e-06   erg/cm2
Peak flux      CPL   4.52e-01  7.69e-01  8.23e-01  8.00e-01  2.44e+00  2.84e+00   ph/cm2/s
      90%_error_low -1.06e-01 -8.09e-02 -8.18e-02 -2.90e-01 -2.07e-01 -3.63e-01   ph/cm2/s
      90%_error_hi   1.11e-01  8.16e-02  8.35e-02  5.03e-01  2.06e-01  5.25e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
   19.2114    68.6826   0.0052    27.0530    27.7544         6.9614397     37.099 TRIG_00804999                 
 
Foreground time interval of the image:
-12.976  67.024 (delta_t =  80.000 [sec])
Background time interval of the image:
-60.976 -12.976 (delta_t =  48.000 [sec])

Light Curves

Note: The mask-weighted lightcurves have units of either count/det or counts/sec/det, where a det is 0.4 x 0.4 = 0.16 sq cm.

Full-time range; 1 s binning

Other quick-look light curves:

• 64 ms binning (zoomed)
• 16 ms binning (zoomed)
• 8 ms binning (zoomed)
• 2 ms binning (zoomed)
• SN=5 or 10 s binning (full-time range)
• Raw light curve

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  -12.976 sec. to   67.024 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.08454     ( -0.056715   0.0571882 )
Norm@50keV  : 5.75800E-03    ( -0.000177835   0.000177159 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          78.02 using 59 PHA bins.
# Reduced chi-squared =          1.369 for     57 degrees of freedom 
# Null hypothesis probability =   3.371065e-02
 
Photon flux (15-150 keV)    in 80 sec: 0.666924 ( -0.021696  0.021785 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.84061e-06 ( -1.51286e-07  1.51569e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from  -12.976 sec. to   67.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.962076     ( -0.167291   0.228688 )
Epeak [keV] : 513.518      ( -513.5 -513.5 )
Norm@50keV  : 6.47494E-03    ( -0.000807621   0.00153146 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          77.11 using 59 PHA bins.
# Reduced chi-squared =          1.377 for     56 degrees of freedom 
# Null hypothesis probability =   3.220868e-02
 
Photon flux (15-150 keV)    in 80 sec: 0.661675 ( -0.02346  0.023432 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.81349e-06 ( -1.59664e-07  1.5827e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from   10.524 sec. to   11.524 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.967101     ( -0.1308   0.13364 )
Norm@50keV  : 2.17329E-02    ( -0.00171949   0.00171471 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.01 using 59 PHA bins.
# Reduced chi-squared =          1.211 for     57 degrees of freedom 
# Null hypothesis probability =   1.323136e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.49834 ( -0.19999  0.20031 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.37832e-07 ( -1.99657e-08  2.00672e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   10.524 sec. to   11.524 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.322073     ( -0.546327   0.634951 )
Epeak [keV] : 151.417      ( -47.7434 426.425 )
Norm@50keV  : 4.17632E-02    ( -0.0174213   0.0350839 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.85 using 59 PHA bins.
# Reduced chi-squared =          1.158 for     56 degrees of freedom 
# Null hypothesis probability =   1.953087e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.44186 ( -0.20671  0.20622 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.52029e-08 ( 0  0 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

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

S(15-50 keV) vs. S(50-150 keV) plot

S(15-50 keV)  = N/A
S(50-150 keV) = N/A

The dash-dotted line and the dashed line traces the fluences calculated from the Band function with Epeak = 15 and 150 keV, respectively. Both lines assume a canonical values of alpha = -1 and beta = -2.5.

Mask shadow pattern

IMX = 4.519368666442643E-01, IMY = -2.378199687258590E-01

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:
-60.976000 -12.976000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
308.0075  41.0664    3.7  46.3  -47.3   0.8913   3.1    8.3	Cyg X-3                       
326.0034  38.3600    6.7  34.4  -59.1  -0.2309  -1.7    8.2	Cyg X-2                       
 40.9508  61.4253    0.8  26.3   53.7   1.6729  15.3 ------	UNKNOWN                       
  4.8091  56.3465    2.1  15.0    7.4   0.3978   5.5 ------	UNKNOWN                       
 11.5360  11.4434    2.3  30.5 -159.0   0.4647   5.1 ------	UNKNOWN                       
306.1703  57.8819    2.5  42.9  -23.7   0.5891   4.6 ------	UNKNOWN                       

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

Time interval of the image:
-12.976000 67.024000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
308.0013  41.1234   23.0  46.3  -47.2  -0.2595  -0.5   11.4	Cyg X-3                       
326.0041  38.2495   11.5  34.4  -59.3   0.3002   1.0    9.0	Cyg X-2                       
 19.2114  68.6826    0.3  27.1   27.8   6.9616  37.1 ------	UNKNOWN                       
 28.3881  -3.6935    2.3  48.2  178.3   1.8724   4.9 ------	UNKNOWN                       
343.4971   5.6066    2.8  43.9 -116.6   2.8590   4.1 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
-60.976000 242.093700
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
308.0615  41.0194    4.7  46.3  -47.4   3.4345   2.4    4.6	Cyg X-3                       
326.3554  38.3835  864.8  34.1  -59.2  -0.0065  -0.0    9.4	Cyg X-2                       
 40.9406  61.4369    0.4  26.3   53.6  11.6110  32.7 ------	UNKNOWN                       
 19.1547  68.6725    0.5  27.0   27.7   6.9475  24.4 ------	UNKNOWN                       
 28.2555 -11.6387    2.6  55.8 -178.8   5.7456   4.4 ------	UNKNOWN                       
 11.5520 -13.8872    3.6  55.8 -158.8   5.6931   3.2 ------	UNKNOWN                       
335.9801  32.7871    3.1  29.3  -75.1   1.5724   3.7 ------	UNKNOWN                       
345.7259   2.8058    3.3  45.4 -121.3   4.7670   3.5 ------	UNKNOWN