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 14:51:24 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger359378
======================================================================
Trigger: 00359378 Segment: 000
BAT Trigger Time: 271350032 [s; MET]
Trigger Stop: 271350096 [s; MET]
UTC: 2009-08-07T15:00:27.022480 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 273.744300314753 Dec: 10.2809416544568 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 13.18
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 13.18
Analysis Position: [ source = BAT ]
RA: 273.744300314753 Dec: 10.2809416544568 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 273.740596127134 Dec: 10.2795620125647 [deg; J2000]
{ 18h 14m 57.7s , +10d 16' 46.4" }
+/- 1.81978519744879 [arcmin] (estimated 90% radius based on SNR)
+/- 0.663278073070067 [arcmin] (formal 1-sigma fit error)
SNR: 12.9318617832287
Angular difference between the analysis and refined position is 0.233826 arcmin
Partial Coding Fraction: 0.640625 [ including projection effects ]
Duration
T90: 146.351999938488 +/- 13.1963055176372
Measured from: -0.444000005722046
to: 145.907999932766 [s; relative to TRIGTIME]
T50: 80.5719999670982 +/- 19.1943076258741
Measured from: 35.8240000009537
to: 116.395999968052 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 41.9480000138283
to: 42.9480000138283 [s; relative to TRIGTIME]
Total Fluence
Measured from: -9.45200002193451
to: 151.487999975681 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.727121 1.793824 0.716037 0.159656
0.102895 0.096105 0.086746 0.090612 [error]
Peak 0.028111 0.029329 0.022718 0.012020
0.008838 0.008155 0.007648 0.007787 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 160.940 -9.452 151.488
T90 146.352 -0.444 145.908
T50 80.572 35.824 116.396
Peak 1.000 41.948 42.948
====== 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 -2.220 -0.145 0.140 - - - 1.44e-03 -1.37e-04 1.35e-04 76.970 57
CPL -1.478 -0.539 0.739 26.965 -24.943 8.776 4.03e-03 -2.16e-03 7.32e-03 72.460 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 -1.830 -0.663 0.603 - - - 5.16e-03 -1.93e-03 1.77e-03 47.990 57
CPL -1.861 -0.837 1.170 9999.360 N/A N/A 5.05e-03 N/A N/A 48.000 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 5.84e-07 6.95e-07 5.96e-07 8.72e-07 2.18e-06 2.75e-06 erg/cm2
90%_error_low -5.70e-08 -4.86e-08 -7.75e-08 -2.05e-07 -1.75e-07 -3.00e-07 erg/cm2
90%_error_hi 5.82e-08 4.85e-08 7.99e-08 2.47e-07 1.79e-07 3.31e-07 erg/cm2
Peak flux PL 2.92e-01 2.42e-01 1.36e-01 1.13e-01 7.19e-01 7.82e-01 ph/cm2/s
90%_error_low -1.30e-01 -7.00e-02 -6.44e-02 -7.86e-02 -2.08e-01 -2.28e-01 ph/cm2/s
90%_error_hi 1.43e-01 6.98e-02 6.63e-02 1.55e-01 2.09e-01 2.31e-01 ph/cm2/s
Fluence CPL 5.53e-07 7.46e-07 5.41e-07 2.33e-07 2.00e-06 2.07e-06 erg/cm2
90%_error_low -6.39e-08 -6.39e-08 -1.06e-07 -1.51e-07 -2.09e-07 -2.67e-07 erg/cm2
90%_error_hi 6.41e-08 6.55e-08 9.84e-08 4.12e-07 2.25e-07 4.79e-07 erg/cm2
Peak flux CPL 2.68e-01 1.99e-01 1.01e-01 8.72e-02 6.04e-01 6.57e-01 ph/cm2/s
90%_error_low N/A -1.19e-01 -5.97e-02 -4.84e-02 N/A -3.90e-01 ph/cm2/s
90%_error_hi N/A 1.05e-01 5.26e-02 4.07e-02 N/A 3.17e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 273.7406 10.2796 0.0149 31.8565 18.6253 2.2916948 12.932 TRIG_00359378 Foreground time interval of the image: -9.452 73.501 (delta_t = 82.953 [sec]) Background time interval of the image: -239.000 -9.452 (delta_t = 229.548 [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 -9.452 sec. to 151.488 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.22046 ( -0.145502 0.140353 ) Norm@50keV : 1.43908E-03 ( -0.00013652 0.00013494 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 76.97 using 59 PHA bins. # Reduced chi-squared = 1.350 for 57 degrees of freedom # Null hypothesis probability = 4.017857e-02 Photon flux (15-150 keV) in 160.9 sec: 0.240861 ( -0.016701 0.016717 ) ph/cm2/s Energy fluence (15-150 keV) : 2.18396e-06 ( -1.75441e-07 1.78726e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -9.452 sec. to 151.488 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.47753 ( -0.539366 0.738502 ) Epeak [keV] : 26.9649 ( -24.9436 8.77593 ) Norm@50keV : 4.02604E-03 ( -0.00215977 0.00732385 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 72.46 using 59 PHA bins. # Reduced chi-squared = 1.294 for 56 degrees of freedom # Null hypothesis probability = 6.857729e-02 Photon flux (15-150 keV) in 160.9 sec: 0.232085 ( -0.017995 0.018045 ) ph/cm2/s Energy fluence (15-150 keV) : 1.99764e-06 ( -2.09479e-07 2.25447e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 41.948 sec. to 42.948 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.83044 ( -0.662951 0.603265 ) Norm@50keV : 5.15587E-03 ( -0.00193015 0.00176566 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 47.99 using 59 PHA bins. # Reduced chi-squared = 0.8419 for 57 degrees of freedom # Null hypothesis probability = 7.966765e-01 Photon flux (15-150 keV) in 1 sec: 0.719066 ( -0.208281 0.208742 ) ph/cm2/s Energy fluence (15-150 keV) : 4.74308e-08 ( -1.65108e-08 1.7696e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 41.948 sec. to 42.948 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.58324 ( -0.114305 1.89249 ) Epeak [keV] : 196.700 ( ) Norm@50keV : 2.11850E-03 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 47.30 using 59 PHA bins. # Reduced chi-squared = 0.8446 for 56 degrees of freedom # Null hypothesis probability = 7.897061e-01 Photon flux (15-150 keV) in 1 sec: 0.603780 ( ) ph/cm2/s Energy fluence (15-150 keV) : 0 ( 0 0 ) 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 = 5.888474441801412E-01, IMY = -1.984581321168578E-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 -9.452000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9788 -15.6320 0.2 24.1 -69.5 16.1379 48.2 0.5 Sco X-1 255.9616 -37.8415 0.9 20.3 -136.4 3.5255 12.6 1.2 4U 1700-377 256.2347 -36.2851 0.0 19.0 -133.9 0.0021 0.0 12.7 GX 349+2 263.0900 -24.5843 6.4 6.9 -108.6 0.4720 1.8 10.6 GX 1+4 264.9264 -44.5842 7.9 23.6 -160.6 0.4409 1.5 11.2 4U 1735-44 268.3818 -1.4441 2.1 19.9 7.3 1.4172 5.6 1.0 SW J1753.5-0127 270.3120 -25.0154 4.5 3.7 -178.2 0.6716 2.6 4.1 GX 5-1 270.3058 -25.6706 17.5 4.4 -176.7 0.1751 0.7 4.4 GRS 1758-258 274.0407 -14.1191 4.1 8.3 41.8 0.6895 2.8 5.4 GX 17+2 275.8482 -30.2713 4.2 10.5 160.3 0.6935 2.7 7.0 H1820-303 284.9964 -24.7785 9.7 14.5 117.7 -0.3665 -1.2 8.8 HT1900.1-2455 288.7024 10.9605 64.2 37.3 42.9 0.0992 0.2 5.7 GRS 1915+105 262.8087 -33.8274 5.0 13.9 -144.7 0.6088 2.3 9.0 GX 354-0 319.0591 -41.7480 3.2 46.0 139.1 4.0070 3.6 ------ UNKNOWN 267.8301 29.3873 2.5 50.7 8.9 3.8157 4.7 ------ UNKNOWN 255.0755 -41.6871 1.9 23.8 -141.2 1.6555 6.0 ------ UNKNOWN 219.3857 -69.8322 3.4 56.9 -150.6 5.1784 3.4 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -9.452000 73.500590 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.8263 -15.6864 4.6 24.2 -69.8 -0.4150 -2.5 9.3 Sco X-1 256.1661 -37.8046 4.0 20.2 -136.7 0.4186 2.9 8.8 4U 1700-377 256.6366 -36.5608 0.0 19.0 -135.2 0.1338 0.9 12.7 GX 349+2 263.0367 -24.8417 11.4 7.0 -110.3 -0.1341 -1.0 6.0 GX 1+4 264.5646 -44.5301 7.2 23.6 -159.9 -0.2258 -1.6 9.0 4U 1735-44 268.2694 -1.5664 113.9 19.8 6.9 -0.0133 -0.1 9.0 SW J1753.5-0127 270.3896 -24.9470 6.7 3.7 -179.5 -0.2308 -1.7 9.8 GX 5-1 270.4737 -25.7518 10.4 4.5 -178.5 0.1491 1.1 9.3 GRS 1758-258 274.1003 -14.1556 17.3 8.3 42.3 0.0865 0.7 9.0 GX 17+2 275.8677 -30.4921 8.2 10.7 160.9 -0.1794 -1.4 8.1 H1820-303 285.0118 -24.7740 4.0 14.5 117.7 0.3971 2.9 8.9 HT1900.1-2455 288.8991 10.9752 4.4 37.4 43.2 0.7062 2.6 6.2 GRS 1915+105 262.8051 -33.8079 3.9 13.9 -144.6 -0.3840 -3.0 9.3 GX 354-0 273.7406 10.2796 0.9 31.9 18.6 2.2968 13.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 141.700600 963.056700 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9759 -15.6391 0.2 38.5 -162.6 50.5121 49.0 0.2 Sco X-1 254.5541 35.1728 0.0 30.4 -62.8 -2.0877 -1.6 11.2 Her X-1 255.9784 -37.8603 1.8 50.9 167.4 16.0810 6.3 1.0 4U 1700-377 256.4493 -36.2574 0.0 49.3 167.7 3.6671 1.7 10.0 GX 349+2 262.9751 -24.7683 3.3 36.6 165.9 4.0602 3.5 2.3 GX 1+4 268.4063 -1.5062 2.6 12.9 173.9 3.5822 4.5 4.0 SW J1753.5-0127 270.2828 -25.0647 103.7 35.5 154.7 0.1440 0.1 0.9 GX 5-1 270.3018 -25.7433 11.7 36.2 154.6 1.3872 1.0 0.0 GRS 1758-258 273.9966 -14.0301 29.1 24.3 148.7 0.3235 0.4 0.7 GX 17+2 276.0861 -30.3936 5.6 40.7 146.2 4.2770 2.1 8.5 H1820-303 285.0325 -24.9117 291.5 36.9 132.1 0.0624 0.0 0.6 HT1900.1-2455 288.8275 11.0099 2.0 14.8 55.1 4.1300 5.9 4.2 GRS 1915+105 299.6042 35.1915 0.4 34.3 8.6 30.8167 32.4 0.9 Cyg X-1 308.0660 40.9818 2.7 43.1 7.8 5.3790 4.3 2.7 Cyg X-3 263.0626 -33.9342 8.2 45.4 161.8 2.8038 1.4 7.0 GX 354-0 314.1584 24.9741 2.4 41.0 32.8 6.9121 4.9 ------ UNKNOWN 298.3734 35.3348 2.7 33.6 7.2 3.7380 4.3 ------ UNKNOWN 263.4135 18.9568 2.4 13.2 -78.6 3.5766 4.8 ------ UNKNOWN 227.1498 -4.1733 4.2 48.6 -135.7 9.9836 2.8 ------ UNKNOWN