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 18:07:34 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger424716
======================================================================
Trigger: 00424716 Segment: 000
BAT Trigger Time: 298244312 [s; MET]
Trigger Stop: 298244376 [s; MET]
UTC: 2010-06-14T21:38:26.107200 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 263.519270851498 Dec: 49.2267444131814 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 14.39
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 14.39
Analysis Position: [ source = BAT ]
RA: 263.519270851498 Dec: 49.2267444131814 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 263.535109180817 Dec: 49.2338201171002 [deg; J2000]
{ 17h 34m 08.4s , +49d 14' 01.8" }
+/- 1.64024711265527 [arcmin] (estimated 90% radius based on SNR)
+/- 0.635124557985357 [arcmin] (formal 1-sigma fit error)
SNR: 15.000478750357
Angular difference between the analysis and refined position is 0.751889 arcmin
Partial Coding Fraction: 0.5625 [ including projection effects ]
Duration
T90: 225 +/- 55.7314991723711
Measured from: 0
to: 225 [s; relative to TRIGTIME]
T50: 79 +/- 20.6155281280883
Measured from: 30
to: 109 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 31
to: 32 [s; relative to TRIGTIME]
Total Fluence
Measured from: -9
to: 282 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.718229 1.788417 1.069450 0.225609
0.110207 0.115825 0.108748 0.112789 [error]
Peak 0.024501 0.012734 0.041362 0.007015
0.007785 0.008546 0.007886 0.008106 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 291.000 -9.000 282.000
T90 225.000 0.000 225.000
T50 79.000 30.000 109.000
Peak 1.000 31.000 32.000
====== 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 -1.864 -0.149 0.145 - - - 9.90e-04 -9.01e-05 8.86e-05 71.960 57
CPL -1.746 -0.516 0.572 92.180 -88.956 -92.180 1.15e-03 -6.02e-04 1.24e-03 71.810 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 -1.118 -0.560 0.568 - - - 5.84e-03 -1.68e-03 1.68e-03 73.130 57
CPL -0.884 0.884 4.279 309.060 N/A N/A 7.20e-03 N/A N/A 73.100 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 5.18e-07 7.63e-07 8.38e-07 1.73e-06 2.65e-06 3.85e-06 erg/cm2
90%_error_low -5.77e-08 -5.59e-08 -1.06e-07 -4.09e-07 -2.38e-07 -5.21e-07 erg/cm2
90%_error_hi 5.91e-08 5.59e-08 1.08e-07 4.92e-07 2.43e-07 5.88e-07 erg/cm2
Peak flux PL 1.67e-01 2.11e-01 1.94e-01 3.13e-01 6.79e-01 8.86e-01 ph/cm2/s
90%_error_low -8.80e-02 -7.65e-02 -6.67e-02 -1.84e-01 -2.00e-01 -2.70e-01 ph/cm2/s
90%_error_hi 1.10e-01 7.27e-02 6.34e-02 2.99e-01 2.02e-01 2.95e-01 ph/cm2/s
Fluence CPL 5.12e-07 7.73e-07 8.35e-07 1.37e-06 2.61e-06 3.49e-06 erg/cm2
90%_error_low -6.45e-08 -6.46e-08 -1.12e-07 -8.48e-07 -2.91e-07 -9.20e-07 erg/cm2
90%_error_hi 6.46e-08 7.23e-08 1.10e-07 4.58e-07 2.74e-07 5.46e-07 erg/cm2
Peak flux CPL 1.56e-01 2.11e-01 2.00e-01 2.69e-01 6.71e-01 8.36e-01 ph/cm2/s
90%_error_low -1.56e-01 -1.28e-01 -7.09e-02 -2.69e-01 -2.49e-01 -4.01e-01 ph/cm2/s
90%_error_hi 1.18e-01 7.67e-02 9.78e-02 2.10e-01 2.07e-01 3.19e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 263.5351 49.2338 0.0128 28.3004 42.3244 2.5324549 15.000 TRIG_00424716 Foreground time interval of the image: -9.000 72.301 (delta_t = 81.301 [sec]) Background time interval of the image: -239.000 -9.000 (delta_t = 230.000 [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 -9.000 sec. to 282.000 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.86435 ( -0.149114 0.144799 ) Norm@50keV : 9.89712E-04 ( -9.01459e-05 8.86015e-05 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 71.96 using 59 PHA bins. # Reduced chi-squared = 1.262 for 57 degrees of freedom # Null hypothesis probability = 8.759340e-02 Photon flux (15-150 keV) in 291 sec: 0.139941 ( -0.010302 0.010307 ) ph/cm2/s Energy fluence (15-150 keV) : 2.64821e-06 ( -2.38014e-07 2.42819e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -9.000 sec. to 282.000 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.7459 ( -0.515985 0.57242 ) Epeak [keV] : 92.1802 ( -88.9829 -92.2075 ) Norm@50keV : 1.15430E-03 ( -0.000601687 0.00124441 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 71.81 using 59 PHA bins. # Reduced chi-squared = 1.282 for 56 degrees of freedom # Null hypothesis probability = 7.573731e-02 Photon flux (15-150 keV) in 291 sec: 0.139025 ( -0.011025 0.010897 ) ph/cm2/s Energy fluence (15-150 keV) : 2.60785e-06 ( -2.91294e-07 2.74274e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 31.000 sec. to 32.000 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.11829 ( -0.560254 0.567681 ) Norm@50keV : 5.84340E-03 ( -0.00168111 0.00167805 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 73.13 using 59 PHA bins. # Reduced chi-squared = 1.283 for 57 degrees of freedom # Null hypothesis probability = 7.366768e-02 Photon flux (15-150 keV) in 1 sec: 0.679047 ( -0.200264 0.201552 ) ph/cm2/s Energy fluence (15-150 keV) : 6.07491e-08 ( -1.95318e-08 1.98574e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 31.000 sec. to 32.000 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.92909 ( 2.94272 6.33754 ) Epeak [keV] : 267.145 ( ) Norm@50keV : 6.67127E-04 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 72.61 using 59 PHA bins. # Reduced chi-squared = 1.297 for 56 degrees of freedom # Null hypothesis probability = 6.705974e-02 Photon flux (15-150 keV) in 1 sec: 0.671162 ( -0.248909 0.206738 ) ph/cm2/s Energy fluence (15-150 keV) : 6.05606e-08 ( -1.9475e-08 1.99068e-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 = 3.981021646531636E-01, IMY = -3.625552295218453E-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: -239.000000 -9.000000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.4968 35.3806 4.7 32.9 71.4 1.0539 2.5 3.0 Her X-1 246.3630 30.8667 2.5 32.9 86.4 2.1211 4.6 ------ UNKNOWN 274.0708 39.9083 2.0 40.0 46.8 3.3149 5.8 ------ UNKNOWN 315.6059 52.0503 2.2 52.3 7.0 3.9531 5.3 ------ UNKNOWN 268.5111 70.9616 2.3 25.5 -6.9 1.1525 5.0 ------ UNKNOWN 313.0562 71.6150 2.3 39.0 -13.3 1.4925 5.1 ------ UNKNOWN 164.7364 66.3311 3.2 25.7 -90.3 1.0211 3.6 ------ UNKNOWN 130.4567 62.4227 2.7 40.8 -88.2 5.3469 4.3 ------ UNKNOWN 147.8037 41.9396 3.1 45.3 -121.4 3.5559 3.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -9.000000 72.300580 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.3922 35.4038 6.4 32.9 71.5 -0.4392 -1.8 4.9 Her X-1 263.5351 49.2338 0.8 28.3 42.3 2.5324 15.0 ------ UNKNOWN 173.8153 25.8205 2.0 43.7 -159.9 1.1663 5.7 ------ UNKNOWN 173.4008 45.9701 2.0 28.8 -136.5 0.8076 5.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 121.900600 963.060000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.4554 35.3244 2.2 15.4 118.8 3.5792 5.3 1.1 Her X-1 288.7836 10.9684 2.8 43.6 52.4 10.8291 4.0 1.6 GRS 1915+105 299.5857 35.2016 0.3 29.8 14.3 31.1705 40.9 0.2 Cyg X-1 308.1586 40.9584 1.8 32.1 -2.5 4.9740 6.5 2.2 Cyg X-3 326.1073 38.2519 12.3 45.2 -10.8 -1.0164 -0.9 5.2 Cyg X-2 309.0111 14.1497 2.0 51.0 27.0 16.8965 5.9 ------ UNKNOWN 200.6114 24.6861 3.7 54.1 176.9 8.2131 3.1 ------ UNKNOWN 327.2632 25.9912 2.7 53.7 0.9 9.1386 4.3 ------ UNKNOWN 273.2819 57.4656 3.3 10.1 -58.8 2.1221 3.5 ------ UNKNOWN 190.1009 29.9756 2.7 57.3 -170.7 14.6695 4.3 ------ UNKNOWN 249.4954 74.6081 3.8 26.1 -98.6 2.6640 3.0 ------ UNKNOWN