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: Sat Jun 20 16:57:00 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger349592
======================================================================
Trigger: 00349592 Segment: 000
BAT Trigger Time: 261841416 [s; MET]
Trigger Stop: 261841480 [s; MET]
UTC: 2009-04-19T13:43:31.327920 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 196.975889867574 Dec: -75.6086233726775 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.88
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.88
Analysis Position: [ source = BAT ]
RA: 196.975889867574 Dec: -75.6086233726775 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 197.015143686887 Dec: -75.6197557290072 [deg; J2000]
{ 13h 08m 03.6s , -75d 37' 11.1" }
+/- 2.04266702127999 [arcmin] (estimated 90% radius based on SNR)
+/- 0.916877251101733 [arcmin] (formal 1-sigma fit error)
SNR: 10.9642513721642
Angular difference between the analysis and refined position is 0.888006 arcmin
Partial Coding Fraction: 0.96875 [ including projection effects ]
Duration
T90: 454.244000017643 +/- 56.4595861755141
Measured from: 18.6559999883175
to: 472.90000000596 [s; relative to TRIGTIME]
T50: 288.852000027895 +/- 66.2010143961493
Measured from: 61.5399999916553
to: 350.39200001955 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 319.263999998569
to: 320.263999998569 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.97600001096725
to: 525.448000013828 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.217349 1.426861 1.289854 0.331782
0.124148 0.122563 0.106855 0.098533 [error]
Peak 0.006607 0.011972 0.018669 0.012720
0.005403 0.005314 0.004880 0.004286 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 527.424 -1.976 525.448
T90 454.244 18.656 472.900
T50 288.852 61.540 350.392
Peak 1.000 319.264 320.264
====== 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 -1.352 -0.157 0.158 - - - 5.19e-04 -4.38e-05 4.37e-05 57.160 57
CPL -1.344 -0.162 0.243 9998.770 -9998.770 -9998.770 5.21e-04 -3.76e-04 -2.73e-04 57.180 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 -0.211 -0.968 1.438 - - - 2.25e-03 -2.25e-03 1.29e-03 64.740 57
CPL -0.323 -0.859 1.477 9999.360 -9999.360 -9999.360 2.39e-03 -2.39e-03 -2.39e-03 64.800 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 3.04e-07 6.12e-07 9.59e-07 3.32e-06 2.67e-06 5.20e-06 erg/cm2
90%_error_low -4.73e-08 -5.68e-08 -1.05e-07 -7.47e-07 -2.53e-07 -8.25e-07 erg/cm2
90%_error_hi 4.94e-08 5.61e-08 1.04e-07 8.96e-07 2.56e-07 9.50e-07 erg/cm2
Peak flux PL 2.72e-02 5.99e-02 1.04e-01 4.18e-01 2.84e-01 6.07e-01 ph/cm2/s
90%_error_low -2.72e-02 -5.99e-02 -1.04e-01 -2.86e-01 -2.84e-01 -2.60e-01 ph/cm2/s
90%_error_hi 6.33e-02 5.83e-02 3.70e-02 1.30e+00 1.85e-01 8.77e-01 ph/cm2/s
Fluence CPL 3.04e-07 6.08e-07 9.54e-07 3.52e-06 2.69e-06 5.24e-06 erg/cm2
90%_error_low N/A N/A -1.20e-07 -1.71e-06 N/A -1.64e-06 erg/cm2
90%_error_hi N/A N/A 1.29e-07 2.13e-07 N/A 3.69e-07 erg/cm2
Peak flux CPL 3.38e-02 1.83e-02 6.18e-03 3.53e-03 6.06e-02 6.22e-02 ph/cm2/s
90%_error_low -3.38e-02 -1.83e-02 -6.18e-03 -3.53e-03 -6.06e-02 -6.22e-02 ph/cm2/s
90%_error_hi 8.68e-02 3.60e-02 1.79e-02 8.23e-03 1.63e-01 1.95e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 197.0151 -75.6198 0.0175 11.3666 -111.6752 1.1913723 10.964 TRIG_00349592 Foreground time interval of the image: -1.976 74.301 (delta_t = 76.277 [sec]) Background time interval of the image: -135.299 -1.976 (delta_t = 133.323 [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 -1.976 sec. to 525.448 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.35159 ( -0.157066 0.158213 ) Norm@50keV : 5.18990E-04 ( -4.38091e-05 4.3665e-05 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 57.16 using 59 PHA bins. # Reduced chi-squared = 1.003 for 57 degrees of freedom # Null hypothesis probability = 4.690213e-01 Photon flux (15-150 keV) in 527.4 sec: 6.25446E-02 ( -0.0053766 0.0053957 ) ph/cm2/s Energy fluence (15-150 keV) : 2.6727e-06 ( -2.53397e-07 2.56103e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.976 sec. to 525.448 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.10347 ( -0.159304 0.245567 ) Epeak [keV] : 38.4852 ( -9999.36 -9999.36 ) Norm@50keV : 1.97419E-04 ( -5.21956e-05 5.12911e-05 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 56.59 using 59 PHA bins. # Reduced chi-squared = 1.011 for 56 degrees of freedom # Null hypothesis probability = 4.528066e-01 Photon flux (15-150 keV) in 527.4 sec: 6.31870E-02 ( -0.0060357 0.0047382 ) ph/cm2/s Energy fluence (15-150 keV) : 2.68745e-06 ( 0 0 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 319.264 sec. to 320.264 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.210968 ( -0.970375 1.43584 ) Norm@50keV : 2.25074E-03 ( -0.00224614 0.00129648 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 64.74 using 59 PHA bins. # Reduced chi-squared = 1.136 for 57 degrees of freedom # Null hypothesis probability = 2.248049e-01 Photon flux (15-150 keV) in 1 sec: 0.283874 6.10337E-02 5.57610E-02 ( ) ph/cm2/s Energy fluence (15-150 keV) : 3.5394e-08 ( -1.20438e-08 1.19593e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 319.264 sec. to 320.264 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.218025 ( -0.865979 1.46946 ) Epeak [keV] : 1.00000E+04 ( -10000 -10000 ) Norm@50keV : 2.29589E-03 ( -0.00229454 -0.00229454 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 64.76 using 59 PHA bins. # Reduced chi-squared = 1.156 for 56 degrees of freedom # Null hypothesis probability = 1.975908e-01 Photon flux (15-150 keV) in 1 sec: 6.06188E-02 ( -0.0606188 0.163248 ) ph/cm2/s Energy fluence (15-150 keV) : 3.5333e-08 ( -1.20108e-08 1.18418e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 454.244 sec. Hardness ratio (energy fluence ratio) = 1.56747256625
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 9.162766e-07 S(50-150 keV) = 1.7564155e-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 = -7.424900975963036E-02, IMY = 1.868148118414339E-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: -135.299400 -1.976000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.5156 -40.5664 2.8 38.5 1.1 0.8197 4.1 0.9 Vela X-1 170.3632 -60.4684 5.4 9.3 6.5 0.2493 2.2 9.4 Cen X-3 186.6433 -62.7618 0.5 2.0 51.7 3.0738 23.4 0.6 GX 301-2 256.0380 -37.9474 15.1 46.7 168.1 0.2319 0.8 6.7 4U 1700-377 256.5319 -36.4857 8.5 48.2 167.4 -0.4971 -1.4 6.0 GX 349+2 264.7148 -44.4453 7.7 45.1 -179.3 0.3714 1.5 1.2 4U 1735-44 263.0890 -33.7108 7.1 53.3 171.5 0.9094 1.6 8.9 GX 354-0 127.1247 -29.6107 3.0 51.4 0.8 1.5063 3.8 ------ UNKNOWN 285.4125 -51.3738 3.6 47.6 -158.2 0.8224 3.3 ------ UNKNOWN 77.6172 -60.4481 3.3 44.8 -60.3 2.4395 3.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -1.976000 74.300610 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.6214 -40.4919 4.8 38.5 1.3 -0.3933 -2.4 5.7 Vela X-1 170.0055 -60.5905 4.6 9.4 5.3 0.2864 2.5 9.3 Cen X-3 186.6197 -62.7644 0.9 2.0 51.4 1.3910 12.7 1.1 GX 301-2 255.9110 -37.7569 6.6 46.8 167.8 -0.4408 -1.8 6.3 4U 1700-377 256.4800 -36.4301 4.3 48.2 167.4 0.7784 2.7 2.2 GX 349+2 264.9505 -44.3714 6.0 45.2 -179.2 0.4021 1.9 10.1 4U 1735-44 263.0333 -33.9276 45.2 53.1 171.6 0.1088 0.3 6.0 GX 354-0 226.6743 -26.2534 2.2 45.3 129.8 2.6308 5.2 ------ UNKNOWN 244.4675 -26.7175 1.8 51.6 149.4 3.7815 6.3 ------ UNKNOWN 197.0151 -75.6197 1.1 11.4 -111.7 1.1911 10.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 108.300580 963.050400 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.5561 -40.5272 1.8 43.9 4.6 5.5532 6.3 2.1 Vela X-1 170.3357 -60.6114 2.6 17.6 32.1 2.3019 4.3 0.9 Cen X-3 186.6636 -62.7672 0.3 13.3 57.9 24.2306 43.1 0.3 GX 301-2 256.1079 -37.9234 8.9 45.9 149.3 2.3222 1.3 7.5 4U 1700-377 256.5763 -36.4821 3.6 47.4 149.2 6.3300 3.2 7.7 GX 349+2 264.7534 -44.2775 0.0 42.0 161.1 1.6231 1.3 10.4 4U 1735-44 262.8596 -33.9097 8.7 51.3 154.7 3.1355 1.3 7.9 GX 354-0 197.0960 -75.6075 1.9 0.0 -167.0 3.4490 6.1 ------ UNKNOWN 306.2786 -36.4538 3.3 59.4 -163.2 19.6788 3.5 ------ UNKNOWN 77.9893 -51.4277 4.5 47.0 -53.1 7.7596 2.6 ------ UNKNOWN