GRB090129

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: Sun Jan 19 18:57:10 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger341504
======================================================================

  Trigger: 00341504      Segment: 000

  BAT Trigger Time: 254956039.744   [s; MET]
      Trigger Stop: 254956040   [s; MET]
               UTC: 2009-01-29T21:07:15.287600    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 269.091866815445   Dec: -32.8258331356111  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.36
     Image Trigger?:     NO
     Rate S/N Ratio:     24.1246761636296  [ if not an image trigger ]
     Image S/N Ratio:    11.36

  Analysis Position:   [ source = BAT ]
    RA: 269.091866815445   Dec: -32.8258331356111  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 269.105558815306   Dec: -32.7923594392183  [deg; J2000]  
        { 17h 56m 25.3s , -32d 47' 32.5" }
         +/- 0.679220234842424 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.252632377131203 [arcmin] (formal 1-sigma fit error)
    SNR: 52.857085747433
 
  Angular difference between the analysis and refined position is 2.123796 arcmin
 
  Partial Coding Fraction: 0.890625    [ including projection effects ]

  Duration
     T90: 17.6240000128746 +/- 2.62417682817886
        Measured from: 0.395999997854233
                   to: 18.0200000107288     [s; relative to TRIGTIME]
     T50: 7.03999999165535 +/- 0.440218143582139
        Measured from: 2.10000002384186
                   to: 9.14000001549721     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.00400000810623     
                   to: 2.00400000810623     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.211999982595444     
                   to: 26.7199999988079     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.334372   1.554283   0.905741   0.140244
           0.036348   0.034906   0.029977   0.025901 [error]
 Peak      0.116618   0.186738   0.130909   0.034123
           0.007875   0.008361   0.007485   0.005921 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   26.932   -0.212   26.720
T90    17.624    0.396   18.020
T50     7.040    2.100    9.140
Peak    1.000    1.004    2.004
 
 
====== 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      -1.824    -0.063      0.062       -           -               -         8.91e-03     -2.86e-04          2.85e-04      46.180   57
CPL     -1.598    -0.239      0.255       88.020     -23.340       -88.020      1.15e-02     -2.69e-03          3.80e-03      43.600   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      -1.434     -0.097     0.096       -           -               -         3.06e-02     -1.67e-03          1.66e-03      52.110   57
CPL     -1.088     -0.373     0.406      134.236     -47.242      -134.236      4.54e-02     -1.52e-02          2.59e-02      49.580   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   4.16e-07  6.27e-07  7.09e-07  1.52e-06  2.21e-06  3.27e-06   erg/cm2
      90%_error_low -2.36e-08 -2.03e-08 -3.14e-08 -1.45e-07 -7.18e-08 -1.67e-07   erg/cm2
      90%_error_hi   2.42e-08  2.03e-08  3.14e-08  1.55e-07  7.20e-08  1.75e-07   erg/cm2
Peak flux       PL   1.18e+00  1.24e+00  9.16e-01  1.09e+00  3.76e+00  4.43e+00   ph/cm2/s
      90%_error_low -1.13e-01 -7.25e-02 -6.25e-02 -1.49e-01 -2.05e-01 -2.42e-01   ph/cm2/s
      90%_error_hi   1.17e-01  7.22e-02  6.22e-02  1.64e-01  2.05e-01  2.43e-01   ph/cm2/s
 
Fluence        CPL    N/A      N/A      N/A      N/A      N/A      N/A      erg/cm2
      90%_error_low -2.36e-08 -2.03e-08 -3.14e-08 -1.45e-07 -7.18e-08 -1.67e-07   erg/cm2
      90%_error_hi   2.42e-08  2.03e-08  3.14e-08  1.55e-07  7.20e-08  1.75e-07   erg/cm2
Peak flux      CPL   1.10e+00  1.27e+00  9.41e-01  7.37e-01  3.69e+00  4.06e+00   ph/cm2/s
      90%_error_low -1.38e-01 -8.23e-02 -6.89e-02 -2.48e-01 -2.18e-01 -3.43e-01   ph/cm2/s
      90%_error_hi   1.41e-01  8.37e-02  6.99e-02  3.72e-01  2.17e-01  4.47e-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
  269.1056   -32.7924   0.0036    18.1521  -129.2073         4.0466769     52.857 TRIG_00341504                 
 
Foreground time interval of the image:
 -0.212  26.720 (delta_t =  26.932 [sec])
Background time interval of the image:
-119.744 -119.607 (delta_t =   0.137 [sec])
-118.744  -0.212 (delta_t = 118.532 [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   -0.212 sec. to   26.720 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.82394     ( -0.0625572   0.0621259 )
Norm@50keV  : 8.91379E-03    ( -0.000286178   0.000285331 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.18 using 59 PHA bins.
# Reduced chi-squared =         0.8102 for     57 degrees of freedom 
# Null hypothesis probability =   8.466841e-01
 
Photon flux (15-150 keV)    in 26.93 sec: 1.23995 ( -0.04174  0.04192 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.20865e-06 ( -7.18355e-08  7.20426e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.212 sec. to   26.720 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.59751     ( -0.238986   0.254569 )
Epeak [keV] : 88.0198      ( -23.3398 -88.0198 )
Norm@50keV  : 1.15444E-02    ( -0.00268708   0.00379569 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.60 using 59 PHA bins.
# Reduced chi-squared =         0.7785 for     56 degrees of freedom 
# Null hypothesis probability =   8.863868e-01
 
Photon flux (15-150 keV)    in 26.93 sec: 1.21635 ( -0.04813  0.04835 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    1.004 sec. to    2.004 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.43377     ( -0.0965682   0.0961552 )
Norm@50keV  : 3.06030E-02    ( -0.00166569   0.00165991 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.11 using 59 PHA bins.
# Reduced chi-squared =         0.9141 for     57 degrees of freedom 
# Null hypothesis probability =   6.588123e-01
 
Photon flux (15-150 keV)    in 1 sec: 3.75653 ( -0.20513  0.20537 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.93778e-07 ( -1.7752e-08  1.78741e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    1.004 sec. to    2.004 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.08832     ( -0.372574   0.405773 )
Epeak [keV] : 134.236      ( -47.2423 -134.236 )
Norm@50keV  : 4.53999E-02    ( -0.0151728   0.0259342 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.58 using 59 PHA bins.
# Reduced chi-squared =         0.8854 for     56 degrees of freedom 
# Null hypothesis probability =   7.149164e-01
 
Photon flux (15-150 keV)    in 1 sec: 3.68834 ( -0.21756  0.21747 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.85568e-07 ( -1.99791e-08  1.99171e-08 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 17.624 sec.
Hardness ratio (energy fluence ratio) = 1.12982195255

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

S(15-50 keV)  = 1.0432189e-06
S(50-150 keV) = 1.1654383e-06

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 = -2.072476352934535E-01,

Spacecraft aspect plot

Bright

Pre-burst

 Time interval of the image: -119.744000 -119.607500 -118.744000 -0.212000

# RAcent #  [deg] 170.2999 -60.4928 186.6830 -62.7873 244.9804 -15.6531 255.9448 -37.7774 256.3333 -36.4242 263.0862 -24.8582 264.5382 -44.4907 268.3689  -1.4510 270.2159 -25.0203 270.1975 -25.6083 274.0267 -14.0014 275.7363 -30.2543 284.9503 -24.9886 262.9862 -33.8936 229.4030 -23.9080 230.8698 -35.1111 261.2344 -20.0026 344.4351 -64.8158 317.0630 -47.5845

Pre-slew

 Time interval of the image: -0.212000 26.720000

# RAcent #  [deg] 170.3242 -60.6215 186.7842 -62.8908 245.1319 -15.5332 255.7992 -37.8957 256.6245 -36.5704 262.8455 -24.6048 264.8624 -44.4009 268.3373  -1.5384 270.4012 -25.0043 270.2614 -25.8511 273.8759 -14.0748 275.7145 -30.2578 284.8415 -24.8409 263.0378 -33.7250 181.6698 -53.7408 198.1638 -60.9298 237.1746   4.1878 231.6985 -35.1879 269.1056 -32.7924 266.3284   7.4401 282.6851  -7.8614

Post-slew

 Time interval of the image: 75.956600 302.346000

# RAcent #  [deg] 170.4973 -60.4540 186.6912 -62.7799 244.9880 -15.6415 256.0507 -37.9360 256.4168 -36.5070 262.9011 -24.8948 264.6739 -44.3408 270.3000 -25.0573 270.3161 -25.6173 274.1335 -14.1348 275.9247 -30.3670 1862.8 262.9535 -33.8115 155.7793 -66.8841

IMY = 2.540448039391481E-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] ['] 84.2 48.1 39.1 -0.0843 -0.1 7.8 Cen X-3 1.3 40.0 38.4 2.7879 9.2 1.3 GX 301-2 0.5 30.2 164.7 4.0013 23.1 0.8 Sco X-1 5.7 8.0 -158.8 0.2575 2.0 4.5 4U 1700-377 3.6 9.4 -159.9 0.4076 3.2 4.9 GX 349+2 5.8 22.3 -154.4 0.2822 2.0 8.0 GX 1+4 6.7 8.9 -92.2 0.2253 1.7 9.1 4U 1735-44 10.3 46.1 -158.8 0.2853 1.1 0.1 SW J1753.5-0127 3.2 25.0 -139.7 0.5283 3.6 5.1 GX 5-1 4.7 24.5 -139.0 0.3690 2.4 9.9 GRS 1758-258 3.1 36.4 -143.9 0.7295 3.8 2.4 GX 17+2 3.5 23.9 -122.5 0.5160 3.3 11.9 H1820-303 4.0 33.3 -118.0 0.6215 2.9 6.2 HT1900.1-2455 2.4 14.1 -141.4 0.6212 4.9 3.5 GX 354-0 1.9 28.1 130.0 1.1331 6.0 ------ UNKNOWN 2.4 19.0 113.1 0.7452 4.9 ------ UNKNOWN 2.8 26.4 -161.9 0.5920 4.2 ------ UNKNOWN 3.1 51.0 -35.0 1.8020 3.8 ------ UNKNOWN 3.6 43.6 -64.4 2.1387 3.2 ------ UNKNOWN background subtracted image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 35.0 48.0 38.9 0.1051 0.3 0.3 Cen X-3 9.0 39.9 38.3 -0.2144 -1.3 8.0 GX 301-2 5.2 30.3 165.0 -0.2018 -2.2 10.9 Sco X-1 5.1 7.9 -159.3 -0.1633 -2.3 9.4 4U 1700-377 0.0 9.4 -158.2 -0.0365 -0.5 12.7 GX 349+2 6.6 22.4 -155.1 0.1274 1.8 12.3 GX 1+4 19.7 9.2 -92.5 0.0424 0.6 5.9 4U 1735-44 3.7 46.0 -158.8 0.4636 3.1 5.5 SW J1753.5-0127 4.8 25.1 -139.4 0.2035 2.4 7.8 GX 5-1 7.7 24.3 -138.5 0.1251 1.5 6.9 GRS 1758-258 4.1 36.3 -144.1 0.2898 2.8 7.9 GX 17+2 0.0 23.9 -122.6 -0.1072 -1.3 12.7 H1820-303 75.1 33.4 -118.3 -0.0190 -0.2 11.6 HT1900.1-2455 4.8 14.3 -141.6 0.1795 2.4 7.0 GX 354-0 2.5 44.5 50.7 1.6667 4.7 ------ UNKNOWN 2.3 34.7 41.8 0.6466 5.1 ------ UNKNOWN 3.3 51.2 159.1 1.1135 3.5 ------ UNKNOWN 2.3 18.4 114.3 0.4123 5.0 ------ UNKNOWN 0.2 18.2 -129.2 4.0464 52.9 ------ UNKNOWN 2.8 54.2 -164.2 0.8755 4.1 ------ UNKNOWN 2.0 45.8 -137.0 1.0320 5.9 ------ UNKNOWN image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 20.0 35.1 44.7 0.2138 0.6 11.5 Cen X-3 0.8 27.1 43.8 3.2441 13.7 1.1 GX 301-2 0.6 39.1 -176.5 5.7821 19.6 0.5 Sco X-1 2.7 20.6 -142.8 0.8362 4.2 6.3 4U 1700-377 4.5 22.0 -144.1 0.5086 2.5 5.1 GX 349+2 0.0 34.8 -145.1 0.2124 0.8 10.7 GX 1+4 8.9 20.0 -116.4 0.2762 1.3 7.2 4U 1735-44 3.2 37.9 -135.0 1.2415 3.6 1.6 GX 5-1 3.9 37.4 -134.5 1.0017 2.9 7.6 GRS 1758-258 5.3 49.2 -138.1 1.7808 2.2 9.5 GX 17+2 36.3 -123.2 0.0020 0.0 0.0 H1820-303 2.8 27.1 -136.5 1.0190 4.1 2.3 GX 354-0 2.5 38.8 30.8 1.6781 4.7 ------ 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