GRB200306C: 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 v2.47
    Process Start Time: Mon May 18 14:26:59 EDT 2020
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger960102
======================================================================

  Trigger: 00960102      Segment: 000

  BAT Trigger Time: 605227863.616   [s; MET]
      Trigger Stop: 605227867.712   [s; MET]
               UTC: 2020-03-06T22:50:39.061800    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 198.58161324179   Dec: 11.2550650612691  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.35
     Image Trigger?:     NO
     Rate S/N Ratio:     14.1067359796659  [ if not an image trigger ]
     Image S/N Ratio:    7.35

  Analysis Position:   [ source = BAT ]
    RA: 198.58161324179   Dec: 11.2550650612691  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 198.577720442576   Dec: 11.2631612679907  [deg; J2000]  
        { 13h 14m 18.7s , +11d 15' 47.4" }
         +/- 1.27543677510759 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.396705734205899 [arcmin] (formal 1-sigma fit error)
    SNR: 21.4870623616894
 
  Angular difference between the analysis and refined position is 0.537075 arcmin
 
  Partial Coding Fraction: 0.4296875    [ including projection effects ]

  Duration
     T90: 53.1520000696182 +/- 13.7253143456788
        Measured from: -8.8160001039505
                   to: 44.3359999656677     [s; relative to TRIGTIME]
     T50: 19.055999994278 +/- 3.82256871307867
        Measured from: -0.976000070571899
                   to: 18.0799999237061     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 3.57199990749359     
                   to: 4.57199990749359     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -12.0640000104904     
                   to: 48.0159999132156     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.569615   1.120629   1.276245   0.601628
           0.073634   0.077388   0.070090   0.060902 [error]
 Peak      0.035700   0.046552   0.058793   0.015848
           0.010308   0.011157   0.009774   0.008292 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   60.080  -12.064   48.016
T90    53.152   -8.816   44.336
T50    19.056   -0.976   18.080
Peak    1.000    3.572    4.572
 
 
====== 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      -0.827    -0.118      0.122       -           -               -         4.03e-03     -2.79e-04          2.75e-04      71.160   57
CPL     -0.819    -0.119      0.122     9997.610    -9997.610      -9997.610      4.06e-03     -2.60e-04          1.39e-03      71.190   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      -1.059     -0.367     0.395       -           -               -         1.04e-02     -2.18e-03          2.16e-03      47.840   57
CPL     -0.828      0.828     1.563      294.753    -294.753      -294.753      1.32e-02     -4.58e-03          4.14e-02      47.850   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   1.65e-07  4.61e-07  1.04e-06  6.25e-06  2.80e-06  7.91e-06   erg/cm2
      90%_error_low -2.46e-08 -4.19e-08 -6.61e-08 -9.26e-07 -1.80e-07 -9.45e-07   erg/cm2
      90%_error_hi   2.62e-08  4.14e-08  6.60e-08  1.05e-06  1.80e-07  1.06e-06   erg/cm2
Peak flux       PL   2.81e-01  3.68e-01  3.54e-01  6.04e-01  1.20e+00  1.61e+00   ph/cm2/s
      90%_error_low -1.15e-01 -1.01e-01 -7.84e-02 -2.49e-01 -2.59e-01 -3.41e-01   ph/cm2/s
      90%_error_hi   1.35e-01  9.71e-02  7.70e-02  3.53e-01  2.61e-01  3.57e-01   ph/cm2/s
 
Fluence        CPL   1.65e-07  4.60e-07  1.03e-06  6.44e-06  2.81e-06  7.86e-06   erg/cm2
      90%_error_low    N/A    -4.57e-08 -6.03e-08 -2.28e-06    N/A    -2.01e-06   erg/cm2
      90%_error_hi     N/A     4.58e-08  9.16e-08  2.69e-07    N/A     4.90e-07   erg/cm2
Peak flux      CPL   2.74e-01  3.70e-01  3.58e-01  5.45e-01  1.20e+00  1.55e+00   ph/cm2/s
      90%_error_low -1.49e-01 -1.01e-01 -8.16e-02 -5.45e-01 -2.72e-01 -5.21e-01   ph/cm2/s
      90%_error_hi   1.19e-01  1.04e-01  9.76e-02  2.48e-01  2.65e-01  4.05e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  198.5777    11.2632   0.0089    30.6281    58.5061         3.2381128     21.487 TRIG_00960102                 
 
Foreground time interval of the image:
-12.064  37.085 (delta_t =  49.149 [sec])
Background time interval of the image:
-239.616 -12.064 (delta_t = 227.552 [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  -12.064 sec. to   48.016 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Photon index: -0.82675     ( -0.117849   0.122078 )
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.826750     ( -0.122078   0.117849 )
Norm@50keV  : 4.03460E-03    ( -0.000278558   0.000274831 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 60.08 sec: 0.463334 ( -0.031131  0.031304 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.80156e-06 ( -1.79698e-07  1.80112e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from  -12.064 sec. to   48.016 sec.
 XSPEC: quit
 
 
Photon index: -0.818719     ( -0.119355   0.122534 )
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.818719     ( -0.122534   0.119355 )
Epeak [keV] : 9997.61      ( -9998.22 -9998.22 )
Norm@50keV  : 4.06179E-03    ( -0.000259903   0.00138884 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 60.08 sec: 0.465571 ( -0.033514  0.028859 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.81061e-06 ( 0  0 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from    3.572 sec. to    4.572 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Photon index: -1.0592     ( -0.367468   0.394958 )
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.05920     ( -0.394958   0.367468 )
Norm@50keV  : 1.04158E-02    ( -0.00218155   0.00215608 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 1.20384 ( -0.258833  0.26105 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.10372e-07 ( -2.3919e-08  2.41149e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from    3.572 sec. to    4.572 sec.
 XSPEC: quit
 
 
Photon index: -0.927399     ( 0.840769   1.57583 )
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.927399     ( -1.57583   -0.840769 )
Epeak [keV] : 459.953      ( -322.703 -322.703 )
Norm@50keV  : 1.18782E-02    ( -0.00313934   0.0428783 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 1.19787 ( -0.271907  0.26493 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.03105e-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 = 3.092967542200852E-01, IMY = -5.048471485744995E-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:
-239.616000 -12.064000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.6082  35.5092   19.9  35.9  -58.8   0.2633   0.6   12.4	Her X-1                       
170.3157  20.0585    2.3  38.7  108.0   3.2172   5.0 ------	UNKNOWN                       
175.6816  37.4810    3.4  25.9  132.4   1.0206   3.3 ------	UNKNOWN                       
124.6323  70.0044    2.4  50.5 -167.9   3.2094   4.8 ------	UNKNOWN                       
285.5220  80.3518    3.0  48.0 -129.1   3.7916   3.9 ------	UNKNOWN                       

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

Time interval of the image:
-12.064000 37.084600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.6327  35.3473   19.5  36.0  -58.6   0.0910   0.6    8.6	Her X-1                       
212.6712 -10.2159    2.6  50.8   33.5   2.1161   4.4 ------	UNKNOWN                       
198.5777  11.2632    0.5  30.6   58.5   3.2381  21.5 ------	UNKNOWN                       
252.9095  15.7759    2.2  45.3  -31.8   0.9122   5.1 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
100.484590 962.499400
975.384000 1065.454000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
172.7442 -28.5471    3.5  47.0   40.5   7.1916   3.3 ------	UNKNOWN                       
159.6836  43.6352    2.8  46.6  150.2  11.8977   4.2 ------	UNKNOWN                       
240.7641  42.2066    2.6  48.0 -129.1  13.5417   4.5 ------	UNKNOWN