GRB050202

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: Wed Jan 22 23:06:34 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger104298
======================================================================

  Trigger: 00104298      Segment: 000

  BAT Trigger Time: 129008114.176   [s; MET]
      Trigger Stop: 129008114.304   [s; MET]
               UTC: 2005-02-02T03:35:14.800740    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 290.560534826378   Dec: -38.7202927722526  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8
     Image Trigger?:     NO
     Rate S/N Ratio:     17.606816861659  [ if not an image trigger ]
     Image S/N Ratio:    8

  Analysis Position:   [ source = BAT ]
    RA: 290.560534826378   Dec: -38.7202927722526  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 290.585434586058   Dec: -38.7303858786776  [deg; J2000]  
        { 19h 22m 20.5s , -38d 43' 49.4" }
         +/- 2.22749690614904 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.11671018228696 [arcmin] (formal 1-sigma fit error)
    SNR: 9.68805944614796
 
  Angular difference between the analysis and refined position is 1.313474 arcmin
 
  Partial Coding Fraction: 0.578125    [ including projection effects ]

  Duration
     T90: 0.112000018358231 +/- 0.0312410085941713
        Measured from: 0.0119999945163727
                   to: 0.124000012874603     [s; relative to TRIGTIME]
     T50: 0.0520000010728836 +/- 0.0200000077486047
        Measured from: 0.0400000065565109
                   to: 0.0920000076293945     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.429999992251396     
                   to: 0.570000007748604     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.00400000810623169     
                   to: 0.131999999284744     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.010408   0.018744   0.018943   0.002846
           0.003239   0.003124   0.002709   0.002045 [error]
 Peak      0.022982   0.027644   0.016371   0.005273
           0.008134   0.006872   0.005580   0.004475 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    0.128    0.004    0.132
T90     0.112    0.012    0.124
T50     0.052    0.040    0.092
Peak    1.000   -0.430    0.570
 
 
====== 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      -1.376    -0.290      0.294       -           -               -         2.51e-02     -4.36e-03          4.36e-03      41.960   57
CPL     -0.319    -1.180      1.915       84.258     -23.347       -84.258      8.04e-02     -8.04e-02          5.41e-01      40.300   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      -1.459     -0.543     0.572       -           -               -         4.67e-03     -1.28e-03          1.27e-03      59.290   57
CPL     -1.477     -0.527     0.596     9999.360    -9999.360      -9999.360      4.65e-03     -1.25e-03          2.29e-02      59.300   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   3.65e-09  7.24e-09  1.11e-08  3.76e-08  3.12e-08  5.96e-08   erg/cm2
      90%_error_low -1.10e-09 -1.43e-09 -2.31e-09 -1.44e-08 -5.77e-09 -1.64e-08   erg/cm2
      90%_error_hi   1.21e-09  1.40e-09  2.28e-09  1.93e-08  5.81e-09  2.03e-08   erg/cm2
Peak flux       PL   1.85e-01  1.90e-01  1.39e-01  1.62e-01  5.77e-01  6.75e-01   ph/cm2/s
      90%_error_low -9.39e-02 -6.42e-02 -4.73e-02 -9.31e-02 -1.69e-01 -1.84e-01   ph/cm2/s
      90%_error_hi   1.11e-01  6.01e-02  4.54e-02  1.58e-01  1.71e-01  1.84e-01   ph/cm2/s
 
Fluence        CPL   2.94e-09  7.91e-09  1.21e-08  1.16e-08  2.95e-08  3.46e-08   erg/cm2
      90%_error_low -1.35e-09 -1.71e-09 -2.72e-09 -8.66e-09 -6.29e-09 -1.07e-08   erg/cm2
      90%_error_hi   1.50e-09  1.82e-09  2.83e-09  3.17e-08  6.29e-09  1.75e-08   erg/cm2
Peak flux      CPL   1.85e-01  1.91e-01  1.37e-01  1.61e-01  5.80e-01  6.84e-01   ph/cm2/s
      90%_error_low     N/A   -6.50e-02 -4.62e-02     N/A   -1.74e-01 -1.94e-01   ph/cm2/s
      90%_error_hi      N/A    6.05e-02  4.75e-02     N/A    1.69e-01  1.73e-01   ph/cm2/s
 
======================================================================

Special notes of this burst

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  290.5854   -38.7304   0.0198    25.6970   -75.4924         0.0558499      9.688 TRIG_00104298                 
 
Foreground time interval of the image:
  0.004   0.132 (delta_t =   0.128 [sec])
Background time interval of the image:
-299.176   0.004 (delta_t = 299.180 [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

Bokeh Plot

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    0.004 sec. to    0.132 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.37638     ( -0.290449   0.294023 )
Norm@50keV  : 2.50761E-02    ( -0.00436356   0.00436279 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.96 using 59 PHA bins.
# Reduced chi-squared =         0.7362 for     57 degrees of freedom 
# Null hypothesis probability =   9.320917e-01
 
Photon flux (15-150 keV)    in 0.128 sec: 3.03786 ( -0.5556  0.55913 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.11724e-08 ( -5.76672e-09  5.80535e-09 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.004 sec. to    0.132 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.318996     ( -1.18016   1.91479 )
Epeak [keV] : 84.2583      ( -23.3435 -84.2551 )
Norm@50keV  : 8.03877E-02    ( -0.080397   0.541368 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.30 using 59 PHA bins.
# Reduced chi-squared =         0.7196 for     56 degrees of freedom 
# Null hypothesis probability =   9.436140e-01
 
Photon flux (15-150 keV)    in 0.128 sec: 2.90802 ( -0.58438  0.58588 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.94687e-08 ( -6.291e-09  6.29153e-09 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from   -0.430 sec. to    0.570 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.45937     ( -0.543132   0.572321 )
Norm@50keV  : 4.66719E-03    ( -0.00127513   0.00127167 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.29 using 59 PHA bins.
# Reduced chi-squared =          1.040 for     57 degrees of freedom 
# Null hypothesis probability =   3.920028e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.576527 ( -0.168874  0.170913 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.45913e-08 ( -1.30442e-08  1.32609e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.430 sec. to    0.570 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.47655     ( -0.52847   0.594153 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 4.64527E-03    ( -0.00127802   0.0228607 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.30 using 59 PHA bins.
# Reduced chi-squared =          1.059 for     56 degrees of freedom 
# Null hypothesis probability =   3.561282e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.580059 ( -0.174074  0.169262 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.49707e-08 ( -1.64001e-08  1.59409e-08 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 0.112 sec.
Hardness ratio (energy fluence ratio) = 1.54081350444

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

S(15-50 keV)  = 1.088567e-08
S(50-150 keV) = 2.0286686e-08

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 = 1.205452569865317E-01,

Spacecraft aspect plot

Bright

Pre-burst

 Time interval of the image: -299.176000 0.004000

# RAcent #  [deg] 186.8925 -62.8407 244.9804 -15.6467 255.9502 -37.8312 256.4260 -36.4179 263.0578 -24.7435 264.6839 -44.3529 268.5192  -1.5606 270.3545 -25.1414 270.3518 -25.7248 273.9708 -14.0495 276.1103 -30.3749 284.8339 -24.8454 262.8904 -33.9178 238.7673 -43.7312 243.0431 -26.5425 296.1554 -54.7085 331.2291 -51.2298

Pre-slew

 Time interval of the image: 0.004000 0.132000

# RAcent #  [deg] 186.3713 -62.7255 244.8387 -15.6167 255.7789 -37.7100 256.2605 -36.5143 262.8809 -24.9143 264.9417 -44.3986 268.3671  -1.5014 270.2838 -25.0789 270.3176 -25.7226 2529.6 274.0800 -13.8788 275.7891 -30.4875 285.0954 -24.7913 263.1574 -33.7697 212.9994 -23.7572 254.5335 -78.7237 290.5836 -38.7265

Post-slew

 Time interval of the image: -299.176000 242.846100

# RAcent #  [deg] 186.8566 -62.8151 244.9800 -15.6456 255.9596 -37.8329 256.4210 -36.4211 263.1124 -24.8816 264.9085 -44.2823 268.5129  -1.5100 270.3197 -25.0771 270.3369 -25.7583 273.9808 -14.0444 276.0483 -30.3903 284.8243 -24.8465 262.8863 -33.8993 235.8955   5.2523 299.8587 -62.4744

IMY = 4.658595688132238E-01 source in the pre-burst/pre-slew/post-slew images

image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 8.1 46.3 43.0 1.4861 1.4 7.7 GX 301-2 0.2 26.6 159.6 21.3837 74.8 0.4 Sco X-1 2.0 2.4 162.9 1.4530 5.8 1.9 4U 1700-377 1.5 3.7 177.1 1.9314 7.4 0.6 GX 349+2 4.6 16.1 -153.8 0.6872 2.5 2.7 GX 1+4 7.6 7.0 -43.2 0.3580 1.5 6.4 4U 1735-44 6.0 39.9 -155.6 -0.7659 -1.9 11.1 SW J1753.5-0127 4.4 18.5 -133.0 0.8093 2.6 5.3 GX 5-1 3.3 18.1 -132.0 1.1341 3.8 2.9 GRS 1758-258 1.8 29.9 -139.2 2.1338 6.4 2.2 GX 17+2 7.6 18.2 -109.7 0.3979 1.5 9.6 H1820-303 19.7 27.7 -108.3 0.2084 0.6 11.9 HT1900.1-2455 4.8 7.6 -135.1 0.6077 2.4 7.0 GX 354-0 3.2 14.2 75.5 0.9021 3.7 ------ UNKNOWN 3.0 17.9 141.3 0.8541 3.8 ------ UNKNOWN 3.1 29.6 -40.7 1.0868 3.8 ------ UNKNOWN 3.4 50.7 -44.5 4.9938 3.4 ------ UNKNOWN background subtracted image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 3.7 46.6 43.2 0.0473 3.2 8.3 GX 301-2 12.0 26.7 159.3 0.0044 1.0 8.3 Sco X-1 0.0 2.6 161.2 0.0027 0.7 12.7 4U 1700-377 25.0 3.6 174.8 0.0018 0.5 10.1 GX 349+2 0.0 15.9 -154.2 0.0025 0.6 12.3 GX 1+4 4.8 7.2 -43.8 0.0095 2.4 9.1 4U 1735-44 5.7 39.9 -155.8 0.0122 2.0 2.9 SW J1753.5-0127 26.5 18.6 -133.3 -0.0018 -0.4 0.0 GX 5-1 18.0 -132.0 0.0000 0.0 1.5 GRS 1758-258 4.8 30.1 -139.1 -0.0125 -2.4 10.4 GX 17+2 8.2 17.9 -109.9 0.0063 1.4 10.1 H1820-303 3.6 27.9 -108.1 -0.0184 -3.2 8.4 HT1900.1-2455 6.6 7.9 -134.3 0.0068 1.7 9.3 GX 354-0 2.0 40.4 106.7 0.0817 5.7 ------ UNKNOWN 2.4 38.7 7.4 0.0275 4.8 ------ UNKNOWN 1.2 25.7 -75.5 0.0558 9.7 ------ UNKNOWN image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 5.8 46.4 43.1 3.6804 2.0 6.1 GX 301-2 0.1 26.6 159.6 45.0411 88.9 0.3 Sco X-1 1.4 2.4 163.1 3.8403 8.4 1.4 4U 1700-377 1.9 3.7 177.0 2.8524 6.1 0.7 GX 349+2 7.0 16.0 -153.5 0.7916 1.6 9.9 GX 1+4 10.0 7.1 -44.4 0.4564 1.2 12.3 4U 1735-44 5.2 39.9 -155.6 -1.5757 -2.2 9.3 SW J1753.5-0127 5.9 18.6 -133.2 1.0846 2.0 1.9 GX 5-1 3.5 18.0 -131.9 1.7802 3.3 2.1 GRS 1758-258 1.8 29.9 -139.2 3.8192 6.5 1.5 GX 17+2 6.6 18.1 -109.8 0.7944 1.8 6.5 H1820-303 33.9 27.7 -108.3 0.2096 0.3 12.4 HT1900.1-2455 4.1 7.7 -135.2 1.2650 2.8 6.4 GX 354-0 2.7 49.4 158.1 5.9288 4.2 ------ UNKNOWN 3.1 33.8 -27.7 2.0088 3.8 ------ UNKNOWN

Analysis Summary

Notes:

Image

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

Light Curves

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:

Time averaged spectrum fit using the average DRM

Power-law model

Cutoff power-law model

1-s peak spectrum fit

Power-law model

Cutoff power-law model

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

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

Mask shadow pattern

Spacecraft aspect plot

Bright

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