GRB210610A: 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: Fri Jul 29 23:06:24 EDT 2022
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1054627
======================================================================

  Trigger: 01054627      Segment: 000

  BAT Trigger Time: 645030250.56   [s; MET]
      Trigger Stop: 645030251.584   [s; MET]
               UTC: 2021-06-10T15:03:43.387320    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 204.285446740885   Dec: 14.4803131180607  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.79
     Image Trigger?:     NO
     Rate S/N Ratio:     18.8148877222268  [ if not an image trigger ]
     Image S/N Ratio:    7.79

  Analysis Position:   [ source = BAT ]
    RA: 204.285446740885   Dec: 14.4803131180607  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 204.284016860347   Dec: 14.4756955581358  [deg; J2000]  
        { 13h 37m 08.2s , +14d 28' 32.5" }
         +/- 1.70591992025749 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.647891043698896 [arcmin] (formal 1-sigma fit error)
    SNR: 14.1823726816602
 
  Angular difference between the analysis and refined position is 0.289239 arcmin
 
  Partial Coding Fraction: 0.265625    [ including projection effects ]

  Duration
     T90: 13.6160000562668 +/- 3.15130957354563
        Measured from: -4.69599997997284
                   to: 8.92000007629395     [s; relative to TRIGTIME]
     T50: 4.25599992275238 +/- 1.25628024155385
        Measured from: -1.76799988746643
                   to: 2.48800003528595     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.291999936103821     
                   to: 0.708000063896179     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -5.97599995136261     
                   to: 11.3519999980927     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.432041   0.490455   0.475982   0.151034
           0.052513   0.055938   0.048528   0.040521 [error]
 Peak      0.083854   0.103429   0.094521   0.018671
           0.014870   0.016417   0.013957   0.010971 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   17.328   -5.976   11.352
T90    13.616   -4.696    8.920
T50     4.256   -1.768    2.488
Peak    1.000   -0.292    0.708
 
 
====== 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      -1.413    -0.186      0.187       -           -               -         6.23e-03     -6.45e-04          6.43e-04      66.110   57
CPL     -1.408    -0.189      0.185     9999.090    -9999.090      -9999.090      6.25e-03     -6.25e-03          3.31e-03      66.130   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      -1.507     -0.259     0.255       -           -               -         2.01e-02     -3.18e-03          3.16e-03      47.960   57
CPL     -1.196     -0.553     1.117      131.899    -131.899      -131.899      2.90e-02     -2.90e-02          7.30e-02      47.650   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   1.27e-07  2.46e-07  3.70e-07  1.20e-06  1.04e-06  1.95e-06   erg/cm2
      90%_error_low -2.37e-08 -2.82e-08 -4.85e-08 -3.15e-07 -1.18e-07 -3.52e-07   erg/cm2
      90%_error_hi   2.49e-08  2.77e-08  4.78e-08  3.84e-07  1.18e-07  4.08e-07   erg/cm2
Peak flux       PL   8.35e-01  8.37e-01  5.89e-01  6.57e-01  2.52e+00  2.92e+00   ph/cm2/s
      90%_error_low -2.09e-01 -1.39e-01 -1.14e-01 -2.25e-01 -3.96e-01 -4.53e-01   ph/cm2/s
      90%_error_hi   2.22e-01  1.37e-01  1.12e-01  2.83e-01  3.96e-01  4.55e-01   ph/cm2/s
 
Fluence        CPL   1.27e-07  2.43e-07  3.70e-07  1.31e-06  1.05e-06  1.94e-06   erg/cm2
      90%_error_low    N/A    -3.50e-08    N/A    -6.73e-07 -1.63e-07 -5.52e-07   erg/cm2
      90%_error_hi     N/A     4.11e-08    N/A     2.37e-07  1.53e-07  3.89e-07   erg/cm2
Peak flux      CPL   7.91e-01  8.65e-01  6.09e-01  4.67e-01  2.50e+00  2.73e+00   ph/cm2/s
      90%_error_low -2.48e-01 -1.58e-01 -1.26e-01 -4.67e-01 -4.03e-01 -5.28e-01   ph/cm2/s
      90%_error_hi   2.52e-01  1.68e-01  1.34e-01  2.66e-01  4.02e-01  6.00e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  204.2840    14.4757   0.0136    35.7802    49.3752         1.5435991     14.182 TRIG_01054627                 
 
Foreground time interval of the image:
 -5.976  11.352 (delta_t =  17.328 [sec])
Background time interval of the image:
-239.560  -5.976 (delta_t = 233.584 [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   -5.976 sec. to   11.352 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.41325     ( -0.185768   0.186704 )
Norm@50keV  : 6.23186E-03    ( -0.000645462   0.00064323 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   66.11     using 59 bins.
 Reduced chi-squared = 1.15982
# Null hypothesis probability of 1.91e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 17.33 sec: 0.761253 ( -0.081518  0.081815 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.0409e-06 ( -1.17799e-07  1.18435e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -5.976 sec. to   11.352 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.40773     ( -0.189003   0.185664 )
Epeak [keV] : 9999.09      ( -9999.36 -9999.36 )
Norm@50keV  : 6.25468E-03    ( -0.00625435   0.00330818 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   66.13     using 59 bins.
 Reduced chi-squared = 1.18089
# Null hypothesis probability of 1.67e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 17.33 sec: 0.766006 ( -0.116122  0.106623 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04623e-06 ( -1.62688e-07  1.52655e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from   -0.292 sec. to    0.708 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.50681     ( -0.258534   0.25477 )
Norm@50keV  : 2.01453E-02    ( -0.00317887   0.00315567 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.96     using 59 bins.
 Reduced chi-squared = 0.841404
# Null hypothesis probability of 7.98e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 2.51962 ( -0.39594  0.3965 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.90924e-07 ( -3.24128e-08  3.26596e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -0.292 sec. to    0.708 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.1956     ( -0.552802   1.11673 )
Epeak [keV] : 131.899      ( -131.899 -131.899 )
Norm@50keV  : 2.89601E-02    ( -0.0289601   0.0730205 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.65     using 59 bins.
 Reduced chi-squared = 0.850893
# Null hypothesis probability of 7.79e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 2.49858 ( -0.40289  0.4018 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.88005e-07 ( -3.39733e-08  3.38402e-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 = 4.692482888128566E-01, IMY = -5.470022311397643E-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:
-239.560000 -5.976000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4859 -40.5616    4.8  52.3 -162.7   1.5077   2.4    2.0	Vela X-1                      
165.2079  37.3644    4.7  37.0  -23.9   0.7658   2.5 ------	UNKNOWN                       
162.5793  32.1826    2.8  32.4  -29.6   1.1541   4.2 ------	UNKNOWN                       
140.6376  43.5508    2.9  50.6  -44.6   4.0582   4.0 ------	UNKNOWN                       
123.1315 -25.1463    2.5  52.9 -139.3   5.4244   4.6 ------	UNKNOWN                       

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

Time interval of the image:
-5.976000 11.352000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5831 -40.5569   34.9  52.3 -162.7  -0.0420  -0.3    2.5	Vela X-1                      
204.2840  14.4757    0.8  35.8   49.4   1.5432  14.2 ------	UNKNOWN                       
166.9932 -46.2050    2.3  47.1  167.2   0.6484   5.0 ------	UNKNOWN                       
182.6464  35.0359    2.4  36.0    0.1   0.3179   4.8 ------	UNKNOWN                       
161.3248 -29.0210    2.3  31.1  179.8   0.2847   4.9 ------	UNKNOWN                       
133.2568  21.2531    2.2  42.0  -74.6   0.9500   5.4 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
73.740590 890.840600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4399  35.3219   51.1  49.4   21.6  -0.4750  -0.2    1.5	Her X-1                       
254.8792  30.0931    2.9  48.9   28.5   9.3534   4.0 ------	UNKNOWN                       
179.3968 -26.1972    3.2  47.3  176.8   5.6758   3.6 ------	UNKNOWN                       
197.2968  31.8101    2.9  18.4  -53.1   2.6305   4.0 ------	UNKNOWN                       
156.2117   5.9855    2.3  48.0 -129.1  13.9383   5.0 ------	UNKNOWN                       
157.6578  12.1746    2.7  45.3 -121.1  10.9511   4.3 ------	UNKNOWN