GRB100212A: 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: Fri Jan 17 19:59:31 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger412081
======================================================================

  Trigger: 00412081      Segment: 000

  BAT Trigger Time: 287676447.552   [s; MET]
      Trigger Stop: 287676448.064   [s; MET]
               UTC: 2010-02-12T14:07:22.028320    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 356.46191166072   Dec: 49.4973281295149  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    14.49
     Image Trigger?:     NO
     Rate S/N Ratio:     28.4077454226836  [ if not an image trigger ]
     Image S/N Ratio:    14.49

  Analysis Position:   [ source = BAT ]
    RA: 356.46191166072   Dec: 49.4973281295149  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 356.468407357116   Dec: 49.4879627632955  [deg; J2000]  
        { 23h 45m 52.4s , +49d 29' 16.7" }
         +/- 1.80016509565804 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.673007133645447 [arcmin] (formal 1-sigma fit error)
    SNR: 13.1336812058078
 
  Angular difference between the analysis and refined position is 0.616315 arcmin
 
  Partial Coding Fraction: 0.8671875    [ including projection effects ]

  Duration
     T90: 163.763999938965 +/- 13.3436019227038
        Measured from: -38.2919999957085
                   to: 125.471999943256     [s; relative to TRIGTIME]
     T50: 82.1039999723434 +/- 25.1611751903544
        Measured from: -0.199999988079071
                   to: 81.9039999842644     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.339999973773956     
                   to: 0.660000026226044     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -44.1159999966621     
                   to: 134.051999986172     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.010014   0.967388   0.348640   0.100529
           0.069203   0.073232   0.070118   0.074914 [error]
 Peak      0.070471   0.097282   0.086107   0.009130
           0.006360   0.007013   0.006822   0.006281 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  178.168  -44.116  134.052
T90   163.764  -38.292  125.472
T50    82.104   -0.200   81.904
Peak    1.000   -0.340    0.660
 
 
====== 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      -2.240    -0.199      0.187       -           -               -         6.78e-04     -9.42e-05          9.33e-05      58.280   57
CPL     -2.224    -0.468      0.172     9999.360      N/A           N/A         6.89e-04        N/A               N/A         58.330   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      -1.284     -0.141     0.140       -           -               -         1.81e-02     -1.41e-03          1.41e-03      77.380   57
CPL     -1.114     -0.293     0.548      273.377    -273.377      -273.377      2.19e-02     -5.03e-03          1.77e-02      77.040   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   3.11e-07  3.65e-07  3.09e-07  4.43e-07  1.14e-06  1.43e-06   erg/cm2
      90%_error_low -3.62e-08 -3.54e-08 -5.78e-08 -1.42e-07 -1.31e-07 -2.20e-07   erg/cm2
      90%_error_hi   3.67e-08  3.50e-08  6.09e-08  1.84e-07  1.36e-07  2.54e-07   erg/cm2
Peak flux       PL   6.06e-01  6.93e-01  5.69e-01  7.83e-01  2.15e+00  2.65e+00   ph/cm2/s
      90%_error_low -8.38e-02 -5.89e-02 -5.59e-02 -1.52e-01 -1.66e-01 -2.19e-01   ph/cm2/s
      90%_error_hi   8.77e-02  5.83e-02  5.54e-02  1.74e-01  1.66e-01  2.24e-01   ph/cm2/s
 
Fluence        CPL   2.98e-07  3.98e-07  2.62e-07  8.42e-08  1.02e-06  1.04e-06   erg/cm2
      90%_error_low -3.95e-08 -4.70e-08 -8.34e-08 -6.74e-08 -1.44e-07 -1.63e-07   erg/cm2
      90%_error_hi   3.94e-08  4.81e-08  7.95e-08  2.81e-07  1.71e-07  3.47e-07   erg/cm2
Peak flux      CPL   5.85e-01  7.02e-01  5.78e-01  6.39e-01  2.13e+00  2.50e+00   ph/cm2/s
      90%_error_low -1.03e-01 -6.43e-02 -6.07e-02 -2.81e-01 -1.75e-01 -3.43e-01   ph/cm2/s
      90%_error_hi   1.02e-01  6.60e-02  6.28e-02  2.04e-01  1.74e-01  3.44e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  356.4684    49.4880   0.0146    15.5643  -102.3370         1.2339771     13.134 TRIG_00412081                 
 
Foreground time interval of the image:
-44.116  10.149 (delta_t =  54.265 [sec])
Background time interval of the image:
-314.851 -44.116 (delta_t = 270.735 [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  -44.116 sec. to  134.052 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.24049     ( -0.198631   0.186806 )
Norm@50keV  : 6.78370E-04    ( -9.42176e-05   9.32692e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.28 using 59 PHA bins.
# Reduced chi-squared =          1.022 for     57 degrees of freedom 
# Null hypothesis probability =   4.279677e-01
 
Photon flux (15-150 keV)    in 178.2 sec: 0.114764 ( -0.010173  0.010173 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.14371e-06 ( -1.30695e-07  1.3569e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from  -44.116 sec. to  134.052 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.22401     ( -0.467269   0.172404 )
Epeak [keV] : 9999.36      (   )
Norm@50keV  : 6.88675E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.31 using 59 PHA bins.
# Reduced chi-squared =          1.041 for     56 degrees of freedom 
# Null hypothesis probability =   3.904601e-01
 
Photon flux (15-150 keV)    in 178.2 sec: 0.110516 ( -0.0106661  0.01082 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.02037e-06 ( -1.4404e-07  1.70948e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from   -0.340 sec. to    0.660 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.28417     ( -0.140579   0.139866 )
Norm@50keV  : 1.80901E-02    ( -0.00140991   0.00140607 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          77.38 using 59 PHA bins.
# Reduced chi-squared =          1.358 for     57 degrees of freedom 
# Null hypothesis probability =   3.752043e-02
 
Photon flux (15-150 keV)    in 1 sec: 2.15205 ( -0.16624  0.16637 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.79486e-07 ( -1.62071e-08  1.6394e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -0.340 sec. to    0.660 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.11426     ( -0.292874   0.548147 )
Epeak [keV] : 273.377      ( -273.358 -273.358 )
Norm@50keV  : 2.18717E-02    ( -0.00502682   0.0176836 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          77.04 using 59 PHA bins.
# Reduced chi-squared =          1.376 for     56 degrees of freedom 
# Null hypothesis probability =   3.258107e-02
 
Photon flux (15-150 keV)    in 1 sec: 2.13387 ( -0.17456  0.17405 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.77129e-07 ( -1.77761e-08  1.76132e-08 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 163.764 sec.
Hardness ratio (energy fluence ratio) = 0.846506154593

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

S(15-50 keV)  = 6.762016e-07
S(50-150 keV) = 4.675273e-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 = -5.951191007813444E-02, IMY = 2.721016923148862E-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:
-314.851400 -44.116000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.6120  35.1855    0.7  48.7  -39.8  13.9939  17.8    1.4	Cyg X-1                       
308.1725  40.9607    2.6  40.2  -43.2   1.8318   4.5    2.9	Cyg X-3                       
326.1173  38.2998    7.4  35.0  -64.8   0.6612   1.6    2.9	Cyg X-2                       
341.4732  65.4911    3.1  10.6  -18.3   0.7610   3.7 ------	UNKNOWN                       
 28.4554  32.1514    2.3  34.8 -160.8   1.2442   5.0 ------	UNKNOWN                       
 38.0285  18.3084    2.9  50.6 -167.0   2.2049   3.9 ------	UNKNOWN                       
358.6502  41.7394    2.5  22.8 -111.9   1.1537   4.6 ------	UNKNOWN                       
 11.9618  31.2684    2.2  33.1 -135.7   1.5499   5.3 ------	UNKNOWN                       

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

Time interval of the image:
-44.116000 10.148600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.5788  35.2976    6.3  48.7  -39.7   0.4804   1.8    5.8	Cyg X-1                       
308.1729  40.8431    7.2  40.3  -43.4   0.2475   1.6    7.2	Cyg X-3                       
326.0925  38.1837    5.6  35.1  -64.8  -0.3227  -2.1    9.1	Cyg X-2                       
220.6416  64.7796    2.0  48.7   34.6   2.2931   5.7 ------	UNKNOWN                       
356.4684  49.4880    0.9  15.6 -102.3   1.2340  13.1 ------	UNKNOWN                       
 31.5200  18.2252    2.1  49.0 -159.2   1.0203   5.6 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
47.148600 842.504400
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.5893  35.2025    0.2  43.2  -28.8  41.9152  47.6    0.1	Cyg X-1                       
308.1356  40.9828    1.3  34.4  -27.2   5.8397   9.0    2.1	Cyg X-3                       
326.1286  38.4773    4.6  24.2  -47.2   1.4803   2.5    9.6	Cyg X-2                       
 57.0597  34.4430    3.1  46.1  143.6   5.9197   3.7 ------	UNKNOWN                       
 33.0249  27.6551    3.1  35.4  172.8   2.8736   3.8 ------	UNKNOWN                       
276.3664  49.0602    3.1  49.6    0.4   4.4372   3.8 ------	UNKNOWN                       
 35.7106  14.9459    2.6  47.0 -178.4   4.2874   4.4 ------	UNKNOWN                       
348.7430  23.9179    3.2  26.3 -105.6   2.1896   3.6 ------	UNKNOWN                       
341.9980  26.3055    3.2  25.8  -90.7   2.4330   3.5 ------	UNKNOWN