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 17:49:15 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger426114
======================================================================
Trigger: 00426114 Segment: 000
BAT Trigger Time: 299405806.764 [s; MET]
Trigger Stop: 299405806.796 [s; MET]
UTC: 2010-06-28T08:16:40.830060 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 225.967631752 Dec: -31.6607579182113 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.88
Image Trigger?: NO
Rate S/N Ratio: 31.7647603485372 [ if not an image trigger ]
Image S/N Ratio: 9.88
Analysis Position: [ source = BAT ]
RA: 225.967631752 Dec: -31.6607579182113 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 225.94305437884 Dec: -31.6529542185084 [deg; J2000]
{ 15h 03m 46.3s , -31d 39' 10.6" }
+/- 2.06791844843284 [arcmin] (estimated 90% radius based on SNR)
+/- 0.885030799813363 [arcmin] (formal 1-sigma fit error)
SNR: 10.7734889116672
Angular difference between the analysis and refined position is 1.339710 arcmin
Partial Coding Fraction: 0.703125 [ including projection effects ]
Duration
T90: 0.0359999537467957 +/- 0.00894429003608426
Measured from: -0.00400000810623169
to: 0.031999945640564 [s; relative to TRIGTIME]
T50: 0.0199999213218689 +/- 0.00565686571343518
Measured from: 0.00400000810623169
to: 0.0239999294281006 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.48199999332428
to: 0.51800000667572 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.00400000810623169
to: 0.0360000133514404 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.006607 0.012837 0.023574 0.003267
0.001782 0.002253 0.002784 0.001871 [error]
Peak -0.004136 0.017805 0.037246 0.009731
0.006523 0.006678 0.006375 0.005576 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 0.040 -0.004 0.036
T90 0.036 -0.004 0.032
T50 0.020 0.004 0.024
Peak 1.000 -0.482 0.518
====== 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 -1.252 -0.256 0.240 - - - 5.28e-02 -1.05e-02 1.04e-02 80.980 57
CPL 2.655 -1.815 3.708 74.331 -8.935 12.103 2.25e+00 -2.25e+00 3.15e+01 60.430 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 -0.533 -0.458 0.543 - - - 4.05e-03 -1.41e-03 1.36e-03 73.630 57
CPL 9.603 -5.170 -9.603 84.670 -10.035 9.620 3.58e+00 -3.58e+00 4.49e+00 63.270 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 2.14e-09 4.58e-09 7.69e-09 2.95e-08 2.11e-08 4.39e-08 erg/cm2
90%_error_low -5.75e-10 -9.23e-10 -1.78e-09 -1.12e-08 -4.57e-09 -1.32e-08 erg/cm2
90%_error_hi 6.11e-10 9.19e-10 1.76e-09 1.38e-08 4.60e-09 1.53e-08 erg/cm2
Peak flux PL 6.62e-02 1.20e-01 1.66e-01 4.78e-01 4.77e-01 8.31e-01 ph/cm2/s
90%_error_low -3.84e-02 -5.15e-02 -4.72e-02 -2.21e-01 -1.44e-01 -2.60e-01 ph/cm2/s
90%_error_hi 5.40e-02 5.46e-02 4.72e-02 3.30e-01 1.48e-01 3.05e-01 ph/cm2/s
Fluence CPL 1.39e-09 1.88e-09 1.96e-09 4.68e-09 6.47e-09 9.89e-09 erg/cm2
90%_error_low N/A -1.04e-09 -1.29e-09 N/A N/A -6.32e-09 erg/cm2
90%_error_hi N/A 4.86e-10 1.05e-09 N/A N/A 4.43e-09 erg/cm2
Peak flux CPL 5.84e-04 3.68e-02 2.86e-01 5.08e-02 3.73e-01 3.67e-01 ph/cm2/s
90%_error_low -3.49e-04 -1.32e-02 -7.83e-02 -2.40e-02 -8.60e-02 -7.98e-02 ph/cm2/s
90%_error_hi 9.01e-03 6.43e-02 6.37e-02 7.45e-02 1.05e-01 1.19e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 225.9431 -31.6530 0.0178 25.6639 25.8237 0.0488699 10.773 TRIG_00426114 Foreground time interval of the image: -0.004 0.036 (delta_t = 0.040 [sec]) Background time interval of the image: -239.764 -0.004 (delta_t = 239.760 [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
- 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 0.036 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.25177 ( -0.254431 0.241358 ) Norm@50keV : 5.28441E-02 ( -0.0104773 0.0104489 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 80.98 using 59 PHA bins. # Reduced chi-squared = 1.421 for 57 degrees of freedom # Null hypothesis probability = 2.011205e-02 Photon flux (15-150 keV) in 0.04 sec: 6.25207 ( -1.22453 1.22483 ) ph/cm2/s Energy fluence (15-150 keV) : 2.11407e-08 ( -4.56624e-09 4.5952e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.004 sec. to 0.036 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 2.65461 ( -1.84252 3.67958 ) Epeak [keV] : 74.3311 ( -8.85621 12.1822 ) Norm@50keV : 2.24508 ( -2.31513 31.4328 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 60.43 using 59 PHA bins. # Reduced chi-squared = 1.079 for 56 degrees of freedom # Null hypothesis probability = 3.188937e-01 Photon flux (15-150 keV) in 0.04 sec: 6.59139 ( -1.24979 1.24642 ) ph/cm2/s Energy fluence (15-150 keV) : 6.47292e-09 ( 0 0 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from -0.482 sec. to 0.518 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.532705 ( -0.463379 0.537868 ) Norm@50keV : 4.04842E-03 ( -0.00140515 0.00136367 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 73.63 using 59 PHA bins. # Reduced chi-squared = 1.292 for 57 degrees of freedom # Null hypothesis probability = 6.829240e-02 Photon flux (15-150 keV) in 1 sec: 0.476618 ( -0.144011 0.148278 ) ph/cm2/s Energy fluence (15-150 keV) : 5.35279e-08 ( -1.54239e-08 1.55183e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.482 sec. to 0.518 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 9.99782 ( -5.56649 -9.99932 ) Epeak [keV] : 83.4911 ( -8.87571 10.7795 ) Norm@50keV : 5.56217 ( -5.53748 2.52581 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 62.81 using 59 PHA bins. # Reduced chi-squared = 1.122 for 56 degrees of freedom # Null hypothesis probability = 2.477025e-01 Photon flux (15-150 keV) in 1 sec: 0.373114 ( -0.085995 0.105048 ) ph/cm2/s Energy fluence (15-150 keV) : 4.50402e-08 ( -1.0843e-08 1.4761e-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 = 4.325087441392111E-01, IMY = -2.093035884143307E-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: -239.764000 -0.004000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.2248 -60.6147 10.5 30.1 -88.0 0.3400 1.1 2.7 Cen X-3 186.6512 -62.7925 0.9 22.0 -88.8 3.1550 13.0 1.3 GX 301-2 244.9988 -15.6487 1.0 43.0 55.3 10.0926 11.6 1.2 Sco X-1 255.9904 -37.8481 1587.5 25.7 86.6 -0.0019 -0.0 0.3 4U 1700-377 256.5661 -36.3554 4.2 27.2 85.7 0.8854 2.8 7.5 GX 349+2 264.4815 -44.5133 0.0 24.7 108.2 -0.3310 -1.2 11.8 4U 1735-44 263.0407 -33.8830 4.1 32.2 92.0 1.3195 2.8 3.9 GX 354-0 255.1679 -41.6858 2.4 22.2 90.8 1.1690 4.8 ------ UNKNOWN 321.6682 -52.4732 2.6 48.9 160.2 2.7087 4.4 ------ UNKNOWN 214.6594 -5.1008 2.3 53.5 14.8 5.0463 5.0 ------ UNKNOWN 21.1255 -61.1071 5.0 59.6 -161.7 4.7257 2.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -0.004000 0.036000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.2525 -60.4763 5.7 30.1 -87.7 -0.0101 -2.0 9.0 Cen X-3 186.6398 -62.8018 179.1 22.0 -88.8 -0.0003 -0.1 1.9 GX 301-2 245.0915 -15.6007 4.9 43.1 55.4 0.0375 2.4 6.9 Sco X-1 256.1745 -37.8711 8.8 25.8 86.9 -0.0072 -1.3 9.0 4U 1700-377 256.6075 -36.4558 156.8 27.2 85.9 -0.0004 -0.1 8.5 GX 349+2 264.6708 -44.2479 0.0 25.0 108.0 -0.0103 -2.0 12.5 4U 1735-44 263.1409 -33.8716 7.6 32.2 92.1 0.0115 1.5 7.9 GX 354-0 230.2607 -22.3712 2.4 34.8 34.3 0.0281 4.8 ------ UNKNOWN 262.7686 -50.9865 2.9 19.9 120.1 0.0166 3.9 ------ UNKNOWN 225.9430 -31.6530 1.1 25.7 25.8 0.0489 10.8 ------ UNKNOWN 337.2373 -75.5502 2.1 39.3 -168.0 0.0261 5.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 69.136590 962.307100 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.2972 -60.7012 22.9 46.2 -148.4 0.7440 0.5 4.7 Cen X-3 186.7029 -62.7887 1.1 39.8 -155.6 13.5826 10.5 1.7 GX 301-2 244.9808 -15.6347 0.3 23.6 49.1 39.9046 46.2 0.3 Sco X-1 256.1865 -37.9397 8.5 25.5 110.2 -1.3015 -1.4 11.1 4U 1700-377 256.5079 -36.2634 3.9 25.6 106.3 2.9647 2.9 10.2 GX 349+2 262.9174 -24.6372 12.6 33.1 84.7 1.3803 0.9 8.2 GX 1+4 264.5122 -44.3834 4.6 32.5 121.7 -3.1165 -2.5 10.7 4U 1735-44 270.3336 -24.9407 7.7 39.3 89.2 -4.4485 -1.5 8.7 GX 5-1 270.3480 -25.7440 5.2 39.1 90.4 6.5817 2.2 2.5 GRS 1758-258 262.9862 -33.8541 13.3 31.0 101.7 1.2639 0.9 1.2 GX 354-0 255.1986 -41.6444 2.2 25.3 119.0 4.6131 5.3 ------ UNKNOWN 234.6120 -33.4814 2.8 7.5 104.0 2.4054 4.1 ------ UNKNOWN 230.0841 -57.1585 3.0 25.7 172.4 2.5864 3.9 ------ UNKNOWN 228.0680 -41.5123 3.3 10.0 168.5 2.3773 3.5 ------ UNKNOWN 227.5817 17.5351 3.2 49.2 -0.5 5.9886 3.6 ------ UNKNOWN 217.7185 -66.2953 4.4 35.0 -176.7 2.2359 2.6 ------ UNKNOWN 199.7616 -58.4302 4.5 32.1 -156.7 1.9149 2.6 ------ UNKNOWN 201.3043 -43.0201 2.6 22.6 -129.8 3.4885 4.5 ------ UNKNOWN 137.4750 -76.0493 4.3 59.0 -166.2 14.4077 2.7 ------ UNKNOWN 166.6938 -49.4100 3.7 47.1 -132.7 8.2677 3.1 ------ UNKNOWN 191.5019 2.1278 4.3 47.0 -53.2 10.3804 2.7 ------ UNKNOWN