GRB201229A: 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 v2.48
    Process Start Time: Sat Jul 30 00:37:05 EDT 2022
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1015088
======================================================================

  Trigger: 01015088      Segment: 000

  BAT Trigger Time: 630932397.184   [s; MET]
      Trigger Stop: 630932401.28   [s; MET]
               UTC: 2020-12-29T10:59:30.947160    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 210.707706522396   Dec: 48.1973283679248  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.78
     Image Trigger?:     NO
     Rate S/N Ratio:     12.6885775404495  [ if not an image trigger ]
     Image S/N Ratio:    8.78

  Analysis Position:   [ source = BAT ]
    RA: 210.707706522396   Dec: 48.1973283679248  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 210.692022884813   Dec: 48.2091696160309  [deg; J2000]  
        { 14h 02m 46.1s , +48d 12' 33.0" }
         +/- 2.61351471855472 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.26163925377268 [arcmin] (formal 1-sigma fit error)
    SNR: 7.71050346658863
 
  Angular difference between the analysis and refined position is 0.947696 arcmin
 
  Partial Coding Fraction: 0.2617188    [ including projection effects ]

  Duration
     T90: 53.2479999065399 +/- 4.61344127077464
        Measured from: -42.960000038147
                   to: 10.2879998683929     [s; relative to TRIGTIME]
     T50: 40.5119998455048 +/- 35.5541745186382
        Measured from: -36.8799999952316
                   to: 3.63199985027313     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.411999940872192     
                   to: 1.41199994087219     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -44.432000041008     
                   to: 13.6159999370575     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.368714   0.777766   0.521816   0.183706
           0.106331   0.111057   0.100104   0.093639 [error]
 Peak      0.037525   0.079524   0.078475   0.026171
           0.015444   0.015872   0.014934   0.012853 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   58.048  -44.432   13.616
T90    53.248  -42.960   10.288
T50    40.512  -36.880    3.632
Peak    1.000    0.412    1.412
 
 
====== 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      -1.398    -0.287      0.290       -           -               -         2.24e-03     -3.96e-04          3.95e-04      56.150   57
CPL     -0.140    -1.300      1.895       73.902     -20.607       -73.902      9.61e-03     -9.61e-03          7.13e-02      53.470   56
 
 
=== 1-s peak 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      -1.291     -0.373     0.384       -           -               -         1.42e-02     -3.19e-03          3.18e-03      68.180   57
CPL     -0.636     -0.913     2.303      116.556    -116.556      -116.556      2.85e-02     -1.71e-02          2.55e-01      67.760   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   1.51e-07  2.96e-07  4.49e-07  1.48e-06  1.26e-06  2.38e-06   erg/cm2
      90%_error_low -4.39e-08 -5.67e-08 -9.65e-08 -5.74e-07 -2.39e-07 -6.65e-07   erg/cm2
      90%_error_hi   4.76e-08  5.59e-08  9.57e-08  7.80e-07  2.42e-07  8.31e-07   erg/cm2
Peak flux       PL   4.79e-01  5.47e-01  4.47e-01  6.11e-01  1.70e+00  2.08e+00   ph/cm2/s
      90%_error_low -1.91e-01 -1.49e-01 -1.12e-01 -2.66e-01 -4.02e-01 -4.67e-01   ph/cm2/s
      90%_error_hi   2.20e-01  1.45e-01  1.09e-01  3.61e-01  4.05e-01  4.70e-01   ph/cm2/s
 
Fluence        CPL   1.22e-07  3.34e-07  4.81e-07  3.44e-07  1.15e-06  1.28e-06   erg/cm2
      90%_error_low -5.26e-08 -7.12e-08 -1.15e-07 -2.65e-07 -2.59e-07 -3.69e-07   erg/cm2
      90%_error_hi   5.62e-08  7.59e-08  1.15e-07  1.24e-06  2.68e-07  1.22e-06   erg/cm2
Peak flux      CPL   4.10e-01  5.71e-01  4.84e-01  3.45e-01  1.65e+00  1.81e+00   ph/cm2/s
      90%_error_low -2.40e-01 -1.63e-01 -1.35e-01 -3.45e-01 -4.10e-01 -5.29e-01   ph/cm2/s
      90%_error_hi   2.71e-01  1.70e-01  1.52e-01  3.61e-01  4.19e-01  5.40e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  210.6920    48.2092   0.0250    41.3006   -47.6301         1.8500243      7.711 TRIG_01015088                 
 
Foreground time interval of the image:
-44.432  13.616 (delta_t =  58.048 [sec])
Background time interval of the image:
-239.184 -44.432 (delta_t = 194.752 [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  -44.432 sec. to   13.616 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.39779     ( -0.287202   0.289722 )
Norm@50keV  : 2.24462E-03    ( -0.000395816   0.00039519 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   56.15     using 59 bins.
 Reduced chi-squared = 0.985088
# Null hypothesis probability of 5.07e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 58.05 sec: 0.273221 ( -0.049403  0.049618 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.25977e-06 ( -2.39133e-07  2.41925e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from  -44.432 sec. to   13.616 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.140129     ( -1.30002   1.89508 )
Epeak [keV] : 73.9019      ( -20.6072 -73.9018 )
Norm@50keV  : 9.61273E-03    ( -0.00961279   0.0712921 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.47     using 59 bins.
 Reduced chi-squared = 0.954821
# Null hypothesis probability of 5.71e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 58.05 sec: 0.260139 ( -0.051644  0.051674 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.15431e-06 ( -2.5937e-07  2.68258e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from    0.412 sec. to    1.412 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.29081     ( -0.373185   0.384326 )
Norm@50keV  : 1.42338E-02    ( -0.0031852   0.00318007 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   68.18     using 59 bins.
 Reduced chi-squared = 1.19614
# Null hypothesis probability of 1.48e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.69531 ( -0.40186  0.40539 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.40991e-07 ( -3.29621e-08  3.30935e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from    0.412 sec. to    1.412 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.635939     ( -0.912899   2.3029 )
Epeak [keV] : 116.556      ( -116.546 -116.546 )
Norm@50keV  : 2.84916E-02    ( -0.0170574   0.255268 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   67.76     using 59 bins.
 Reduced chi-squared = 1.21
# Null hypothesis probability of 1.35e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.65476 ( -0.4099  0.41883 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.37749e-07 ( -2.05403e-08  3.44339e-08 ) 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 = 5.920610100434884E-01, IMY = 6.490742208579083E-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:
-239.184000 -44.432000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
159.8449  22.2857    3.0  51.3   19.3   3.0455   3.9 ------	UNKNOWN                       
192.6608  25.3320    4.0  56.5  -17.7   3.4236   2.9 ------	UNKNOWN                       

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

Time interval of the image:
-44.432000 13.616000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
160.5954  19.4793    2.3  54.2   19.1   2.5707   5.0 ------	UNKNOWN                       
210.6920  48.2092    1.5  41.3  -47.6   1.8491   7.7 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
95.516600 962.894500
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4358  35.2926    2.1  34.6 -115.5   7.3135   5.4    3.2	Her X-1                       
132.3667  69.3607    2.6  41.8  117.9  13.5011   4.4 ------	UNKNOWN                       
157.7173  41.2733    3.1  37.5   68.7   6.3926   3.8 ------	UNKNOWN                       
 36.0669  82.7957    2.6  49.0  148.1  15.0519   4.5 ------	UNKNOWN                       
168.9617  58.8728    3.9  26.4   98.5   3.0770   3.0 ------	UNKNOWN                       
182.8603  -3.0509    3.1  56.7    2.9  11.7661   3.7 ------	UNKNOWN                       
323.7940  62.9450    2.9  57.0  179.0  17.0544   4.0 ------	UNKNOWN                       
213.1260  30.2339    2.4  18.1  -37.8   3.8033   4.9 ------	UNKNOWN                       
219.9443  -2.1461    3.2  51.0  -42.9  11.6879   3.7 ------	UNKNOWN                       
277.4819  36.4337    3.5  49.2 -133.1  12.0660   3.3 ------	UNKNOWN