GRB190109A: 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: Sun Mar 17 22:56:43 EDT 2019
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger882747
======================================================================

  Trigger: 00882747      Segment: 000

  BAT Trigger Time: 568703584   [s; MET]
      Trigger Stop: 568703680   [s; MET]
               UTC: 2019-01-09T05:12:41.780680    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 33.2181437048103   Dec: 38.1099859036362  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    19.78
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    19.78

  Analysis Position:   [ source = BAT ]
    RA: 33.2181437048103   Dec: 38.1099859036362  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 33.2143907597294   Dec: 38.1112460329202  [deg; J2000]  
        { 02h 12m 51.5s , +38d 06' 40.5" }
         +/- 1.02805090206141 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.373776012119829 [arcmin] (formal 1-sigma fit error)
    SNR: 29.2384697514341
 
  Angular difference between the analysis and refined position is 0.192632 arcmin
 
  Partial Coding Fraction: 0.2851562    [ including projection effects ]

  Duration
     T90: 115.007999897003 +/- 33.8917526652539
        Measured from: 12.2560000419617
                   to: 127.263999938965     [s; relative to TRIGTIME]
     T50: 45.3880000114441 +/- 3.69487054579114
        Measured from: 31.4839999675751
                   to: 76.8719999790192     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 38.8279999494553     
                   to: 39.8279999494553     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 5.86800003051758     
                   to: 206.679999947548     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     3.162105   4.612923   2.367926   0.352234
           0.145105   0.151791   0.129867   0.109244 [error]
 Peak      0.074511   0.072266   0.076282   0.003877
           0.013786   0.015314   0.012665   0.009429 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  200.812    5.868  206.680
T90   115.008   12.256  127.264
T50    45.388   31.484   76.872
Peak    1.000   38.828   39.828
 
 
====== 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: CPL)
 
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      -1.864    -0.079      0.078       -           -               -         3.33e-03     -1.61e-04          1.60e-04      88.840   57
CPL     -0.329    -0.451      0.502       49.501      -3.452         4.370      2.19e-02     -9.27e-03          1.87e-02      46.110   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      -1.668     -0.317     0.299       -           -               -         1.42e-02     -2.86e-03          2.80e-03      65.630   57
CPL     -0.913     -1.290     1.572       72.650     -46.554       -72.650      3.44e-02     -3.44e-02          1.66e-01      64.500   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   1.20e-06  1.77e-06  1.95e-06  4.03e-06  6.16e-06  8.95e-06   erg/cm2
      90%_error_low -8.33e-08 -7.88e-08 -1.25e-07 -5.08e-07 -2.96e-07 -6.30e-07   erg/cm2
      90%_error_hi   8.48e-08  7.88e-08  1.26e-07  5.54e-07  2.98e-07  6.64e-07   erg/cm2
Peak flux       PL   6.85e-01  6.25e-01  3.93e-01  3.78e-01  1.86e+00  2.08e+00   ph/cm2/s
      90%_error_low -1.91e-01 -1.20e-01 -9.90e-02 -1.58e-01 -3.52e-01 -3.91e-01   ph/cm2/s
      90%_error_hi   2.04e-01  1.19e-01  9.73e-02  2.07e-01  3.52e-01  3.93e-01   ph/cm2/s
 
Fluence        CPL   9.64e-07  2.04e-06  1.93e-06  6.74e-07  5.45e-06  5.61e-06   erg/cm2
      90%_error_low -1.02e-07 -1.08e-07 -1.57e-07 -2.46e-07 -3.31e-07 -4.05e-07   erg/cm2
      90%_error_hi   1.04e-07  1.10e-07  1.53e-07  3.70e-07  3.39e-07  4.83e-07   erg/cm2
Peak flux      CPL   6.04e-01  6.77e-01  4.26e-01  1.88e-01  1.83e+00  1.89e+00   ph/cm2/s
      90%_error_low -2.39e-01 -1.45e-01 -1.14e-01 -1.88e-01 -3.60e-01 -3.97e-01   ph/cm2/s
      90%_error_hi   2.41e-01  1.54e-01  1.21e-01  2.62e-01  3.58e-01  4.75e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
   33.2144    38.1112   0.0065    32.6971    75.0753         9.7042926     29.238 TRIG_00882747                 
 
Foreground time interval of the image:
  5.868 105.701 (delta_t =  99.833 [sec])
Background time interval of the image:
-239.000   5.868 (delta_t = 244.868 [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    5.868 sec. to  206.680 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.86377     ( -0.0789212   0.0777441 )
Norm@50keV  : 3.33414E-03    ( -0.000160588   0.000159786 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          88.84 using 59 PHA bins.
# Reduced chi-squared =          1.559 for     57 degrees of freedom 
# Null hypothesis probability =   4.421823e-03
 
Photon flux (15-150 keV)    in 200.8 sec: 0.471319 ( -0.021483  0.021519 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.15607e-06 ( -2.96389e-07  2.97857e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from    5.868 sec. to  206.680 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.329152     ( -0.451168   0.501856 )
Epeak [keV] : 49.5010      ( -3.45164 4.3706 )
Norm@50keV  : 2.19279E-02    ( -0.0092747   0.0187229 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.11 using 59 PHA bins.
# Reduced chi-squared =         0.8234 for     56 degrees of freedom 
# Null hypothesis probability =   8.243563e-01
 
Photon flux (15-150 keV)    in 200.8 sec: 0.435178 ( -0.023269  0.023359 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.45272e-06 ( -3.30675e-07  3.38944e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from   38.828 sec. to   39.828 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.66823     ( -0.316979   0.299432 )
Norm@50keV  : 1.41677E-02    ( -0.00285587   0.00279874 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.63 using 59 PHA bins.
# Reduced chi-squared =          1.151 for     57 degrees of freedom 
# Null hypothesis probability =   2.026216e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.86130 ( -0.35172  0.35208 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.31553e-07 ( -2.75035e-08  2.77926e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   38.828 sec. to   39.828 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.912667     ( -1.29019   1.57242 )
Epeak [keV] : 72.6505      ( -46.5543 -72.6503 )
Norm@50keV  : 3.44005E-02    ( -0.0344017   0.165804 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.50 using 59 PHA bins.
# Reduced chi-squared =          1.152 for     56 degrees of freedom 
# Null hypothesis probability =   2.036946e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.82764 ( -0.36021  0.35795 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.43865e-08 ( -3.1676e-08  2.08075e-08 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 115.008 sec.
Hardness ratio (energy fluence ratio) = 0.94920534386

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

S(15-50 keV)  = 3.0010334e-06
S(50-150 keV) = 2.4516496e-06

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 = 1.653252734593688E-01, IMY = -6.202629123611765E-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:
-239.000000 5.868000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
308.0959  40.9137    3.2  49.6  -27.7   2.0539   3.6    2.4	Cyg X-3                       
326.3993  38.3017    0.0  35.3  -26.3   0.4438   1.4   10.8	Cyg X-2                       
 30.0973  15.8777    2.4  27.5  119.5   1.5027   4.8 ------	UNKNOWN                       
 13.4795  36.2126    2.5  19.1   55.8   1.1385   4.6 ------	UNKNOWN                       
 28.4048 -24.3842    2.7  51.7  173.5   3.1030   4.2 ------	UNKNOWN                       
327.0795  50.4806    2.7  40.6   -8.4   1.4210   4.2 ------	UNKNOWN                       

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

Time interval of the image:
5.868000 105.700600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
308.0456  40.8425    6.7  49.6  -27.8  -0.5601  -1.7    7.2	Cyg X-3                       
326.1583  38.1848    6.6  35.4  -26.6   0.3478   1.7    8.2	Cyg X-2                       
 33.2144  38.1113    0.4  32.7   75.1   9.7035  29.2 ------	UNKNOWN                       
345.2162  63.8784    2.1  45.0   15.1   1.6219   5.5 ------	UNKNOWN                       
 18.5578  18.1042    2.4  16.2  119.7   0.8024   4.8 ------	UNKNOWN                       
 15.6440 -26.9911    2.4  49.1 -171.5   1.6885   4.8 ------	UNKNOWN                       
  6.6721 -16.1770    2.1  36.7 -163.1   1.0400   5.4 ------	UNKNOWN                       
295.2937  50.0896    2.0  59.5  -17.8   5.2771   5.8 ------	UNKNOWN                       
307.8753  32.8062    3.1  49.1  -38.4   1.6334   3.8 ------	UNKNOWN                       
310.7987  21.7621    2.3  47.2  -53.4   3.3137   5.0 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
158.300590 963.082300
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
212.0899  86.0079    4.1  55.9   10.8   8.0669   2.8 ------	UNKNOWN                       
 40.9445  61.4402    0.4  23.8   19.9  19.1308  30.3 ------	UNKNOWN                       
357.9866  67.6430    2.8  35.4  -11.5   2.9164   4.1 ------	UNKNOWN                       
309.9905  72.4478    2.8  51.9  -11.6   5.5958   4.1 ------	UNKNOWN