GRB190701A: 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: Tue Jul 30 17:51:12 EDT 2019
             Host Name: bat3
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger912310
======================================================================

  Trigger: 00912310      Segment: 000

  BAT Trigger Time: 583667144   [s; MET]
      Trigger Stop: 583667208   [s; MET]
               UTC: 2019-07-01T09:45:20.833660    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 28.0627118270664   Dec: 58.9063378051181  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.19
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.19

  Analysis Position:   [ source = BAT ]
    RA: 28.0627118270664   Dec: 58.9063378051181  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 28.1312176098513   Dec: 58.8991373797762  [deg; J2000]  
        { 01h 52m 31.5s , +58d 53' 56.9" }
         +/- 2.38853371059077 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.37181431067582 [arcmin] (formal 1-sigma fit error)
    SNR: 8.76860892657775
 
  Angular difference between the analysis and refined position is 2.166476 arcmin
 
  Partial Coding Fraction: 0.5234375    [ including projection effects ]

  Duration
     T90: 52.432000041008 +/- 4.0175614563681
        Measured from: 35.9119999408722
                   to: 88.3439999818802     [s; relative to TRIGTIME]
     T50: 43.3120000362396 +/- 31.9806100860231
        Measured from: 39.4479999542236
                   to: 82.7599999904633     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 37.9160000085831     
                   to: 38.9160000085831     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 35.0160000324249     
                   to: 89.9919999837875     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.540434   0.586785   0.373185  -0.049720
           0.074872   0.076066   0.065561   0.057532 [error]
 Peak      0.038172   0.067429   0.026761   0.004603
           0.011351   0.011835   0.009959   0.008012 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   54.976   35.016   89.992
T90    52.432   35.912   88.344
T50    43.312   39.448   82.760
Peak    1.000   37.916   38.916
 
 
====== 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: 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      -1.904    -0.280      0.261       -           -               -         1.71e-03     -3.02e-04          2.92e-04      59.310   57
CPL     -1.793    -0.605      1.098       81.670     -81.655       -81.670      1.98e-03     -1.98e-03          6.13e-03      59.270   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      -1.753     -0.425     0.406       -           -               -         8.66e-03     -2.34e-03          2.27e-03      48.650   57
CPL     -1.093     -1.296     4.685       57.021      N/A           N/A         2.11e-02        N/A               N/A         48.280   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   1.76e-07  2.53e-07  2.70e-07  5.35e-07  8.64e-07  1.23e-06   erg/cm2
      90%_error_low -3.58e-08 -3.57e-08 -6.41e-08 -2.18e-07 -1.47e-07 -2.94e-07   erg/cm2
      90%_error_hi   3.70e-08  3.57e-08  6.51e-08  3.00e-07  1.50e-07  3.57e-07   erg/cm2
Peak flux       PL   4.55e-01  3.94e-01  2.34e-01  2.08e-01  1.17e+00  1.29e+00   ph/cm2/s
      90%_error_low -1.58e-01 -9.48e-02 -7.91e-02 -1.11e-01 -2.81e-01 -3.10e-01   ph/cm2/s
      90%_error_hi   1.68e-01  9.44e-02  7.99e-02  1.68e-01  2.81e-01  3.11e-01   ph/cm2/s
 
Fluence        CPL   1.74e-07  2.56e-07  2.70e-07  4.34e-07  8.55e-07  1.13e-06   erg/cm2
      90%_error_low -3.99e-08 -3.88e-08 -6.45e-08 -3.51e-07 -1.64e-07 -4.06e-07   erg/cm2
      90%_error_hi   3.92e-08  4.78e-08  6.66e-08  1.50e-07  1.42e-07  2.96e-07   erg/cm2
Peak flux      CPL   4.31e-01  4.31e-01  2.31e-01  8.11e-02  1.15e+00  1.17e+00   ph/cm2/s
      90%_error_low -1.82e-01 -1.24e-01     N/A   -8.11e-02 -2.99e-01 -3.24e-01   ph/cm2/s
      90%_error_hi   1.80e-01  1.81e-01     N/A    1.66e-01  2.90e-01  3.30e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
   28.1312    58.8991   0.0219    32.3469   -67.4961         1.0321845      8.769 TRIG_00912310                 
 
Foreground time interval of the image:
 35.016  73.101 (delta_t =  38.085 [sec])
Background time interval of the image:
-239.000  35.016 (delta_t = 274.016 [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   35.016 sec. to   89.992 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.90444     ( -0.279651   0.261448 )
Norm@50keV  : 1.70957E-03    ( -0.000302451   0.00029196 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.31 using 59 PHA bins.
# Reduced chi-squared =          1.041 for     57 degrees of freedom 
# Null hypothesis probability =   3.913477e-01
 
Photon flux (15-150 keV)    in 54.98 sec: 0.245821 ( -0.034867  0.034881 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.64319e-07 ( -1.46566e-07  1.50117e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   35.016 sec. to   89.992 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.7929     ( -0.605017   1.0983 )
Epeak [keV] : 81.6703      ( -81.6277 -81.6432 )
Norm@50keV  : 1.97523E-03    ( -0.00197545   0.00612922 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.27 using 59 PHA bins.
# Reduced chi-squared =          1.058 for     56 degrees of freedom 
# Null hypothesis probability =   3.572749e-01
 
Photon flux (15-150 keV)    in 54.98 sec: 0.244801 ( -0.035889  0.035612 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.55016e-07 ( -1.63942e-07  1.41547e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from   37.916 sec. to   38.916 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.75295     ( -0.425256   0.405511 )
Norm@50keV  : 8.66280E-03    ( -0.00234495   0.00227051 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.65 using 59 PHA bins.
# Reduced chi-squared =         0.8535 for     57 degrees of freedom 
# Null hypothesis probability =   7.766305e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.17269 ( -0.280722  0.28101 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.99337e-08 ( -2.16738e-08  2.2372e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   37.916 sec. to   38.916 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.09293     ( -1.30739   4.67375 )
Epeak [keV] : 57.0211      (   )
Norm@50keV  : 2.10883E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.28 using 59 PHA bins.
# Reduced chi-squared =         0.8621 for     56 degrees of freedom 
# Null hypothesis probability =   7.587077e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.14867 ( -0.299354  0.28955 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.3731e-08 ( -2.73628e-08  2.65642e-08 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 52.432 sec.
Hardness ratio (energy fluence ratio) = 1.06851395027

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

S(15-50 keV)  = 4.281968e-07
S(50-150 keV) = 4.361166e-07

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 = 2.424009774163753E-01, IMY = 5.850947854765933E-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 35.016000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.5825  35.1919    0.9  27.7  101.9  11.7838  12.5    0.7	Cyg X-1                       
307.9821  40.9286   11.1  19.4   94.5   0.6388   1.0    6.0	Cyg X-3                       
326.1741  38.3222 2700.0  18.7   50.0  -0.0002  -0.0    0.1	Cyg X-2                       
248.1752  43.5834    2.6  48.1  161.5  11.1575   4.4 ------	UNKNOWN                       
  5.9305  10.8162    2.7  55.8    1.9   8.1399   4.2 ------	UNKNOWN                       
247.9333  59.0653    2.7  38.5  179.5   3.3220   4.2 ------	UNKNOWN                       
345.8325  60.1212    2.3  11.3  -61.9   2.2796   5.0 ------	UNKNOWN                       
210.0462  73.2857    2.9  42.5 -149.7   3.2354   4.0 ------	UNKNOWN                       
165.8805  71.2896    2.4  50.9 -135.5  10.4662   4.8 ------	UNKNOWN                       

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

Time interval of the image:
35.016000 73.100590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.6259  35.1175    5.5  27.7  101.8  -0.3489  -2.1    5.3	Cyg X-1                       
308.1028  40.9758    4.8  19.3   94.3   0.2653   2.4    1.4	Cyg X-3                       
326.4250  38.3339   11.3  18.7   49.3   0.0975   1.0   11.9	Cyg X-2                       
334.3660  27.5516    2.1  30.2   36.2   0.7883   5.4 ------	UNKNOWN                       
  5.8489  12.6570    2.2  54.2    1.0   1.4857   5.2 ------	UNKNOWN                       
225.3813  55.0868    2.3  50.5 -174.0   1.2822   5.0 ------	UNKNOWN                       
 15.8606  30.2738    2.2  44.0  -21.9   0.7740   5.4 ------	UNKNOWN                       
 28.1311  58.8991    1.3  32.3  -67.5   1.0320   8.8 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
125.300600 963.015300
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
245.7722  70.2924    2.6  48.0  161.5  28.8592   4.5 ------	UNKNOWN                       
159.8405  74.3737    2.8  42.9 -165.2   9.0375   4.1 ------	UNKNOWN                       
 80.1538  35.2880    2.5  41.1  -80.9  19.3064   4.5 ------	UNKNOWN