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 Oct 13 20:14:26 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger613775
======================================================================
Trigger: 00613775 Segment: 000
BAT Trigger Time: 433487723.968 [s; MET]
Trigger Stop: 433487732.16 [s; MET]
UTC: 2014-09-27T05:15:11.388280 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 291.844604487003 Dec: -65.3875048699422 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.16
Image Trigger?: NO
Rate S/N Ratio: 9.1104335791443 [ if not an image trigger ]
Image S/N Ratio: 7.16
Analysis Position: [ source = BAT ]
RA: 291.844604487003 Dec: -65.3875048699422 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 291.801712791228 Dec: -65.3995353587662 [deg; J2000]
{ 19h 27m 12.4s , -65d 23' 58.3" }
+/- 2.16906695627081 [arcmin] (estimated 90% radius based on SNR)
+/- 1.180336366314 [arcmin] (formal 1-sigma fit error)
SNR: 10.0630224023881
Angular difference between the analysis and refined position is 1.292009 arcmin
Partial Coding Fraction: 0.546875 [ including projection effects ]
Duration
T90: 6.25599998235703 +/- 1.42603365502763
Measured from: 2.17599999904633
to: 8.43199998140335 [s; relative to TRIGTIME]
T50: 3.82799994945526 +/- 1.43990277345572
Measured from: 3.61599999666214
to: 7.4439999461174 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 7.69599997997284
to: 8.69599997997284 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.428000032901764
to: 8.69599997997284 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.137630 0.194180 0.102082 0.012838
0.028746 0.026136 0.020920 0.016805 [error]
Peak 0.046588 0.037168 0.013841 0.009542
0.010083 0.009557 0.007475 0.005869 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 8.268 0.428 8.696
T90 6.256 2.176 8.432
T50 3.828 3.616 7.444
Peak 1.000 7.696 8.696
====== 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 -1.818 -0.302 0.294 - - - 3.53e-03 -6.32e-04 6.18e-04 56.640 57
CPL -1.822 -0.325 0.838 9999.270 N/A N/A 3.52e-03 N/A N/A 56.640 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 -2.268 -0.523 0.462 - - - 5.30e-03 -1.91e-03 1.88e-03 68.890 57
CPL 0.596 -2.640 -0.596 28.608 N/A N/A 4.65e-01 N/A N/A 66.180 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 5.02e-08 7.61e-08 8.63e-08 1.87e-07 2.68e-07 3.99e-07 erg/cm2
90%_error_low -1.28e-08 -1.25e-08 -2.05e-08 -7.77e-08 -4.80e-08 -1.00e-07 erg/cm2
90%_error_hi 1.34e-08 1.25e-08 2.05e-08 1.09e-07 4.86e-08 1.23e-07 erg/cm2
Peak flux PL 4.58e-01 2.94e-01 1.22e-01 6.91e-02 9.09e-01 9.43e-01 ph/cm2/s
90%_error_low -1.56e-01 -8.05e-02 -5.35e-02 -4.34e-02 -2.44e-01 -2.52e-01 ph/cm2/s
90%_error_hi 1.63e-01 7.99e-02 5.88e-02 7.55e-02 2.44e-01 2.53e-01 ph/cm2/s
Fluence CPL N/A N/A N/A N/A N/A N/A erg/cm2
90%_error_low -1.28e-08 -1.25e-08 -2.05e-08 -7.77e-08 -4.80e-08 -1.00e-07 erg/cm2
90%_error_hi 1.34e-08 1.25e-08 2.05e-08 1.09e-07 4.86e-08 1.23e-07 erg/cm2
Peak flux CPL 4.43e-01 3.78e-01 4.70e-02 3.18e-04 8.68e-01 8.69e-01 ph/cm2/s
90%_error_low -1.69e-01 -1.13e-01 -4.70e-02 -3.18e-04 -2.36e-01 -2.36e-01 ph/cm2/s
90%_error_hi 2.10e-01 1.18e-01 1.03e-01 5.13e-02 2.39e-01 2.39e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 291.8017 -65.3995 0.0190 36.6060 169.2671 0.4611118 10.063 TRIG_00613775 Foreground time interval of the image: 0.428 8.696 (delta_t = 8.268 [sec]) Background time interval of the image: -239.968 0.428 (delta_t = 240.396 [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 0.428 sec. to 8.696 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.81761 ( -0.302022 0.294043 ) Norm@50keV : 3.52682E-03 ( -0.000632374 0.000617518 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 56.64 using 59 PHA bins. # Reduced chi-squared = 0.9937 for 57 degrees of freedom # Null hypothesis probability = 4.885215e-01 Photon flux (15-150 keV) in 8.268 sec: 0.489373 ( -0.081898 0.082231 ) ph/cm2/s Energy fluence (15-150 keV) : 2.68337e-07 ( -4.79529e-08 4.86492e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.428 sec. to 8.696 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.82151 ( -0.32543 0.837569 ) Epeak [keV] : 9999.27 ( ) Norm@50keV : 3.51976E-03 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 56.64 using 59 PHA bins. # Reduced chi-squared = 1.011 for 56 degrees of freedom # Null hypothesis probability = 4.508849e-01 Photon flux (15-150 keV) in 8.268 sec: 0.490657 ( -0.085397 0.0833 ) ph/cm2/s Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 7.696 sec. to 8.696 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.26778 ( -0.52304 0.461914 ) Norm@50keV : 5.29515E-03 ( -0.00191462 0.00187971 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 68.89 using 59 PHA bins. # Reduced chi-squared = 1.209 for 57 degrees of freedom # Null hypothesis probability = 1.344005e-01 Photon flux (15-150 keV) in 1 sec: 0.909161 ( -0.24369 0.243829 ) ph/cm2/s Energy fluence (15-150 keV) : 5.03292e-08 ( -1.52476e-08 1.60161e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 7.696 sec. to 8.696 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 0.595766 ( -2.68184 -0.637635 ) Epeak [keV] : 28.6081 ( ) Norm@50keV : 0.465293 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 66.18 using 59 PHA bins. # Reduced chi-squared = 1.182 for 56 degrees of freedom # Null hypothesis probability = 1.658101e-01 Photon flux (15-150 keV) in 1 sec: 0.868171 ( -0.235878 0.238869 ) ph/cm2/s Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 6.256 sec. Hardness ratio (energy fluence ratio) = 1.13477612743
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 1.2625969e-07 S(50-150 keV) = 1.4207964e-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 = -7.298330504303442E-01, IMY = -1.383374533288296E-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: -239.968000 0.428000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9886 -15.6296 0.3 25.6 -48.2 11.2352 41.8 0.8 Sco X-1 255.9900 -37.8484 0.5 10.3 -119.7 5.6040 25.0 0.3 4U 1700-377 256.3797 -36.4412 1.5 9.4 -113.2 1.6842 7.6 2.9 GX 349+2 263.1750 -24.7642 6.5 8.0 -15.9 0.4126 1.8 9.1 GX 1+4 264.7029 -44.4832 3.4 12.4 -167.3 0.8021 3.4 2.6 4U 1735-44 268.4217 -1.5225 4.5 30.7 10.3 0.6926 2.6 5.3 SW J1753.5-0127 270.4454 -25.0485 7.0 7.9 33.4 0.4038 1.7 9.0 GX 5-1 270.4517 -25.6356 6.0 7.4 35.3 0.5312 2.2 10.3 GRS 1758-258 273.9412 -14.0737 2.5 19.3 28.8 1.1057 4.5 4.4 GX 17+2 275.8878 -30.3605 3.1 8.2 86.3 0.8113 3.8 2.0 H1820-303 285.0115 -25.0454 8.3 17.7 77.6 0.4080 1.4 7.6 HT1900.1-2455 288.8601 10.9132 3.2 48.1 36.7 3.7674 3.6 4.1 GRS 1915+105 262.9227 -33.8069 2.2 3.4 -112.8 1.1870 5.3 3.7 GX 354-0 323.0870 -46.8759 3.3 45.0 132.8 3.5665 3.5 ------ UNKNOWN 287.0729 -7.6587 2.4 31.1 49.0 1.9031 4.8 ------ UNKNOWN 266.5565 -32.2221 1.6 0.1 158.8 1.8419 7.4 ------ UNKNOWN 218.4658 -29.9756 3.5 40.9 -93.5 3.6897 3.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: 0.428000 8.696000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9499 -15.7825 7.8 25.5 -48.6 0.0545 1.5 8.7 Sco X-1 255.8409 -37.9567 5.3 10.5 -119.9 0.0656 2.2 9.7 4U 1700-377 256.6241 -36.5174 3.2 9.3 -114.1 0.1072 3.6 10.7 GX 349+2 262.8594 -24.9079 0.0 7.9 -18.2 0.0133 0.4 12.7 GX 1+4 264.5452 -44.5136 3.4 12.4 -166.8 -0.1072 -3.4 9.3 4U 1735-44 268.4772 -1.3114 6.4 30.9 10.4 0.0711 1.8 10.7 SW J1753.5-0127 270.2637 -24.9307 10.5 7.9 31.9 0.0345 1.1 9.0 GX 5-1 270.1981 -25.9077 3.7 7.0 34.7 -0.0984 -3.1 11.4 GRS 1758-258 274.0395 -14.0634 197.7 19.4 29.1 -0.0020 -0.1 2.5 GX 17+2 275.7867 -30.3815 8.7 8.1 86.3 -0.0431 -1.3 7.2 H1820-303 285.0039 -24.9861 4.1 17.7 77.4 -0.1064 -2.8 4.3 HT1900.1-2455 288.7461 10.8103 28.0 47.9 36.6 -0.0585 -0.4 8.7 GRS 1915+105 262.8237 -33.9959 0.0 3.6 -114.9 -0.0741 -2.3 12.7 GX 354-0 291.8019 -65.3994 1.1 36.6 169.3 0.4612 10.1 ------ UNKNOWN 287.1856 -63.9899 2.3 34.3 170.7 0.2186 5.1 ------ UNKNOWN 288.2671 -84.2429 2.5 52.5 -176.1 0.4137 4.7 ------ UNKNOWN 250.6190 -15.2445 2.4 22.3 -37.6 0.1582 4.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 106.532600 907.032600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.3076 -60.6240 25.6 46.8 -127.5 0.9449 0.5 0.2 Cen X-3 186.6624 -62.7027 6.2 40.7 -119.8 2.7069 1.9 4.1 GX 301-2 256.0467 -37.8483 1.9 34.5 -37.3 3.7856 6.2 2.9 4U 1700-377 256.5804 -36.4940 3.6 35.5 -35.6 1.9595 3.2 8.2 GX 349+2 263.1685 -24.6059 5.6 44.7 -20.9 1.7115 2.1 12.1 GX 1+4 264.6876 -44.5405 3.5 25.6 -31.4 1.5362 3.3 5.9 4U 1735-44 270.1590 -25.0928 3.9 42.6 -12.2 2.0715 3.0 6.9 GX 5-1 270.3238 -25.7260 3.3 41.9 -12.2 2.3030 3.6 1.5 GRS 1758-258 274.0190 -14.0382 4.0 52.7 -4.5 3.8626 2.9 0.8 GX 17+2 275.9545 -30.3795 3.1 36.3 -6.1 2.5329 3.7 1.7 H1820-303 285.0677 -25.0118 2.4 40.6 8.0 3.4140 4.9 5.7 HT1900.1-2455 263.0238 -33.8247 1.8 36.0 -25.6 3.9697 6.5 1.8 GX 354-0 352.2002 -41.9700 3.6 40.4 102.5 8.7184 3.2 ------ UNKNOWN 50.7755 -56.7895 3.5 49.4 158.3 6.0305 3.3 ------ UNKNOWN 82.4010 -65.7986 3.6 47.1 -178.5 3.3546 3.2 ------ UNKNOWN 94.4015 -68.0319 2.8 46.0 -171.5 4.0806 4.0 ------ UNKNOWN 266.5738 -32.2264 1.5 36.5 -19.9 4.5187 7.6 ------ UNKNOWN 261.2762 -11.2843 2.5 58.0 -18.6 9.9115 4.6 ------ UNKNOWN