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: Mon Jan 13 18:21:03 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger507342
======================================================================
Trigger: 00507342 Segment: 000
BAT Trigger Time: 342500273.6 [s; MET]
Trigger Stop: 342500277.696 [s; MET]
UTC: 2011-11-09T02:57:46.046320 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 118.196067983082 Dec: -41.5986755526321 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.62
Image Trigger?: NO
Rate S/N Ratio: 13.856406460551 [ if not an image trigger ]
Image S/N Ratio: 8.62
Analysis Position: [ source = BAT ]
RA: 118.196067983082 Dec: -41.5986755526321 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 118.247685673307 Dec: -41.588936780625 [deg; J2000]
{ 07h 52m 59.4s , -41d 35' 20.2" }
+/- 1.92908741729053 [arcmin] (estimated 90% radius based on SNR)
+/- 0.820417587419659 [arcmin] (formal 1-sigma fit error)
SNR: 11.8979680043782
Angular difference between the analysis and refined position is 2.388768 arcmin
Partial Coding Fraction: 0.9140625 [ including projection effects ]
Duration
T90: 13 +/- 3.16227766016838
Measured from: -5.60000002384186
to: 7.39999997615814 [s; relative to TRIGTIME]
T50: 6 +/- 2.82842712474619
Measured from: -3.60000002384186
to: 2.39999997615814 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.39999997615814
to: 2.39999997615814 [s; relative to TRIGTIME]
Total Fluence
Measured from: -5.60000002384186
to: 8.39999997615814 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.155543 0.197678 0.090641 0.009748
0.021964 0.022106 0.019480 0.017833 [error]
Peak 0.027079 0.025092 0.013938 0.003615
0.006095 0.006118 0.005397 0.004866 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 14.000 -5.600 8.400
T90 13.000 -5.600 7.400
T50 6.000 -3.600 2.400
Peak 1.000 1.400 2.400
====== 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 -1.856 -0.263 0.249 - - - 1.89e-03 -3.30e-04 3.22e-04 57.210 57
CPL -1.057 -1.057 1.451 47.390 -47.174 -47.390 5.63e-03 -5.63e-03 3.64e-02 55.710 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 -1.845 -0.511 0.456 - - - 3.95e-03 -1.30e-03 1.23e-03 68.080 57
CPL -1.640 -0.622 2.160 72.646 N/A N/A 5.22e-03 N/A N/A 68.030 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 4.73e-08 7.00e-08 7.73e-08 1.61e-07 2.43e-07 3.55e-07 erg/cm2
90%_error_low -9.09e-09 -9.76e-09 -1.79e-08 -6.34e-08 -4.15e-08 -8.54e-08 erg/cm2
90%_error_hi 9.32e-09 9.74e-09 1.85e-08 8.71e-08 4.29e-08 1.04e-07 erg/cm2
Peak flux PL 2.27e-01 1.86e-01 1.04e-01 8.51e-02 5.55e-01 6.02e-01 ph/cm2/s
90%_error_low -7.89e-02 -4.71e-02 -4.27e-02 -5.22e-02 -1.40e-01 -1.57e-01 ph/cm2/s
90%_error_hi 8.29e-02 4.70e-02 4.43e-02 8.76e-02 1.40e-01 1.60e-01 ph/cm2/s
Fluence CPL 4.48e-08 7.71e-08 7.26e-08 4.06e-08 2.21e-07 2.35e-07 erg/cm2
90%_error_low -1.02e-08 -8.70e-09 -2.40e-08 -3.44e-08 -4.58e-08 -5.92e-08 erg/cm2
90%_error_hi 1.01e-08 1.44e-08 2.13e-08 1.44e-07 5.25e-08 1.46e-07 erg/cm2
Peak flux CPL 2.23e-01 1.91e-01 1.03e-01 6.12e-02 5.51e-01 5.80e-01 ph/cm2/s
90%_error_low -8.61e-02 N/A -4.39e-02 -6.12e-02 -1.40e-01 -1.65e-01 ph/cm2/s
90%_error_hi 4.39e-02 N/A 4.61e-02 3.76e-02 1.42e-01 1.75e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 118.2477 -41.5889 0.0162 16.9931 34.9004 0.5006448 11.898 TRIG_00507342 Foreground time interval of the image: -5.600 8.400 (delta_t = 14.000 [sec]) Background time interval of the image: -239.600 -5.600 (delta_t = 234.000 [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 -5.600 sec. to 8.400 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.8563 ( -0.263331 0.248692 ) Norm@50keV : 1.89106E-03 ( -0.000330024 0.000321523 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 57.21 using 59 PHA bins. # Reduced chi-squared = 1.004 for 57 degrees of freedom # Null hypothesis probability = 4.671410e-01 Photon flux (15-150 keV) in 14 sec: 0.266507 ( -0.036889 0.036889 ) ph/cm2/s Energy fluence (15-150 keV) : 2.43454e-07 ( -4.15351e-08 4.29423e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -5.600 sec. to 8.400 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.05742 ( -1.05722 1.45052 ) Epeak [keV] : 47.3897 ( -47.1732 -47.3891 ) Norm@50keV : 5.62933E-03 ( -0.00562973 0.0363801 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 55.71 using 59 PHA bins. # Reduced chi-squared = 0.9949 for 56 degrees of freedom # Null hypothesis probability = 4.856560e-01 Photon flux (15-150 keV) in 14 sec: 0.258625 ( -0.038137 0.038359 ) ph/cm2/s Energy fluence (15-150 keV) : 2.20556e-07 ( -4.58419e-08 5.25228e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 1.400 sec. to 2.400 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.84504 ( -0.510966 0.455955 ) Norm@50keV : 3.95497E-03 ( -0.00130033 0.00122933 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 68.08 using 59 PHA bins. # Reduced chi-squared = 1.194 for 57 degrees of freedom # Null hypothesis probability = 1.494907e-01 Photon flux (15-150 keV) in 1 sec: 0.554826 ( -0.139679 0.139685 ) ph/cm2/s Energy fluence (15-150 keV) : 3.63739e-08 ( -1.1352e-08 1.20478e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.400 sec. to 2.400 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.64002 ( -0.621954 2.1604 ) Epeak [keV] : 72.6463 ( ) Norm@50keV : 5.22281E-03 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 68.03 using 59 PHA bins. # Reduced chi-squared = 1.215 for 56 degrees of freedom # Null hypothesis probability = 1.300496e-01 Photon flux (15-150 keV) in 1 sec: 0.551144 ( -0.140324 0.141586 ) ph/cm2/s Energy fluence (15-150 keV) : 3.54585e-08 ( -1.26109e-08 1.12956e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 13.0 sec. Hardness ratio (energy fluence ratio) = 1.10479076494
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 1.1724844e-07 S(50-150 keV) = 1.2620783e-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 = 2.506366746392414E-01, IMY = -1.748493670789323E-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: -239.600000 -5.600000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.5126 -40.5483 1.2 8.2 -13.5 2.0397 10.0 0.8 Vela X-1 170.2622 -60.5856 2.0 35.9 -45.2 1.7150 5.6 2.7 Cen X-3 186.6556 -62.7183 5.3 43.7 -48.0 1.1526 2.2 3.1 GX 301-2 114.3120 -32.2557 2.4 18.5 67.3 1.1019 4.8 ------ UNKNOWN 96.2382 -66.7674 2.6 41.6 5.2 1.4109 4.5 ------ UNKNOWN 92.5749 -78.8272 2.9 49.9 -7.2 1.8138 4.0 ------ UNKNOWN 150.6959 -50.3127 3.1 20.9 -43.9 0.7442 3.8 ------ UNKNOWN 169.5947 16.9877 3.4 58.8 -159.3 4.7582 3.4 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -5.600000 8.400000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.2819 -40.6525 21.9 8.3 -12.3 0.0212 0.5 12.7 Vela X-1 170.2358 -60.4923 27.9 35.8 -45.3 -0.0242 -0.4 8.2 Cen X-3 186.5070 -62.7333 7.3 43.7 -47.9 0.1573 1.6 4.7 GX 301-2 72.2043 -55.5630 2.4 49.4 24.8 0.7781 4.7 ------ UNKNOWN 118.2477 -41.5889 1.0 17.0 34.9 0.5006 11.9 ------ UNKNOWN 156.3569 17.9217 1.9 53.9 -173.3 0.7014 6.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 243.300610 546.300630 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9823 -15.6296 0.2 29.0 -72.6 31.9594 64.0 0.7 Sco X-1 254.3040 35.4095 4.3 55.1 0.0 4.3188 2.7 8.5 Her X-1 256.2074 -37.9358 5.8 27.5 -125.6 0.9156 2.0 11.8 4U 1700-377 256.5154 -36.3905 3.8 26.2 -123.6 1.3660 3.1 4.3 GX 349+2 262.8176 -24.6435 15.4 14.4 -107.8 0.2718 0.7 12.1 GX 1+4 264.7714 -44.4631 6.9 29.7 -144.2 0.6836 1.7 1.5 4U 1735-44 268.3120 -1.4613 5.3 16.1 -4.8 0.7013 2.2 3.4 SW J1753.5-0127 270.2850 -25.1467 6.1 10.2 -133.3 0.7689 1.9 4.0 GX 5-1 270.2008 -25.9303 8.4 10.9 -134.9 0.5671 1.4 12.5 GRS 1758-258 274.0519 -14.0346 1.9 2.3 -7.7 2.1894 6.0 2.7 GX 17+2 275.7846 -30.3041 4.8 14.3 -161.4 0.7597 2.4 8.2 H1820-303 284.9244 -25.0555 7.6 12.8 156.9 0.4729 1.5 10.1 HT1900.1-2455 288.8077 10.9608 1.5 30.2 48.1 3.9739 7.5 1.1 GRS 1915+105 262.9547 -33.8995 2.3 21.0 -129.8 1.9083 4.9 4.2 GX 354-0 302.3189 -5.1262 2.8 28.8 91.4 2.4452 4.2 ------ UNKNOWN 269.8776 33.3409 2.6 49.7 14.9 4.2569 4.5 ------ UNKNOWN 276.5964 -9.3641 3.3 6.8 32.6 1.0798 3.6 ------ UNKNOWN 293.9929 -50.9288 2.7 38.0 -178.5 2.1082 4.4 ------ UNKNOWN 253.6981 -45.8593 2.4 34.8 -132.7 2.3883 4.7 ------ UNKNOWN 241.1350 -9.8269 3.0 33.7 -62.9 2.1559 3.8 ------ UNKNOWN 251.9772 -71.3095 2.3 57.0 -150.6 9.9105 4.9 ------ UNKNOWN