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 Aug 7 22:40:34 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger649916
======================================================================
Trigger: 00649916 Segment: 000
BAT Trigger Time: 459251888 [s; MET]
Trigger Stop: 459251952 [s; MET]
UTC: 2015-07-22T09:57:53.112440 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 218.271508942397 Dec: -35.1965701114099 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.92
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.92
Analysis Position: [ source = BAT ]
RA: 218.271508942397 Dec: -35.1965701114099 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 218.272 Dec: -35.1966 [deg; J2000]
{ 14h 33m 05.3s , -35d -11' -47.8" }
+/- 2.34165183892 [arcmin] (estimated 90% radius based on SNR)
SNR: 9.02165393084
Angular difference between the analysis and refined position is 0.024144 arcmin
Partial Coding Fraction: 0.9453125 [ including projection effects ]
Duration
T90: 67.3120000362396 +/- 11.7648860619575
Measured from: -24.0720000267029
to: 43.2400000095367 [s; relative to TRIGTIME]
T50: 40.0000000596046 +/- 18.3425398190956
Measured from: -5.76800000667572
to: 34.2320000529289 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 15.1000000238419
to: 16.1000000238419 [s; relative to TRIGTIME]
Total Fluence
Measured from: -26.4559999704361
to: 45.6240000128746 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.396468 0.374142 0.265958 0.025434
0.050833 0.048023 0.039924 0.032779 [error]
Peak 0.012884 0.023820 0.008152 0.004477
0.006027 0.005706 0.004832 0.003992 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 72.080 -26.456 45.624
T90 67.312 -24.072 43.240
T50 40.000 -5.768 34.232
Peak 1.000 15.100 16.100
====== 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 -1.843 -0.271 0.257 - - - 8.97e-04 -1.40e-04 1.35e-04 51.020 57
CPL -1.838 -1.128 0.346 9999.360 N/A N/A 8.99e-04 N/A N/A 51.030 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 -1.724 -0.649 0.596 - - - 3.16e-03 -1.17e-03 1.10e-03 37.340 57
CPL -1.582 -0.443 4.781 131.171 N/A N/A 3.78e-03 N/A N/A 37.380 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 1.14e-07 1.70e-07 1.90e-07 4.00e-07 5.95e-07 8.74e-07 erg/cm2
90%_error_low -2.34e-08 -2.21e-08 -4.09e-08 -1.54e-07 -9.14e-08 -1.97e-07 erg/cm2
90%_error_hi 2.44e-08 2.21e-08 4.10e-08 2.09e-07 9.32e-08 2.40e-07 erg/cm2
Peak flux PL 1.61e-01 1.42e-01 8.60e-02 7.87e-02 4.23e-01 4.68e-01 ph/cm2/s
90%_error_low -7.75e-02 -4.64e-02 -4.00e-02 -5.40e-02 -1.36e-01 -1.50e-01 ph/cm2/s
90%_error_hi 8.70e-02 4.58e-02 3.99e-02 9.95e-02 1.36e-01 1.51e-01 ph/cm2/s
Fluence CPL 1.10e-07 1.21e-07 1.57e-07 4.47e-07 5.17e-07 8.66e-07 erg/cm2
90%_error_low -2.74e-08 -5.22e-08 -3.69e-08 -1.97e-07 -1.22e-07 -2.54e-07 erg/cm2
90%_error_hi 2.62e-08 4.85e-08 2.90e-08 5.25e-08 1.01e-07 2.34e-07 erg/cm2
Peak flux CPL 1.62e-01 1.41e-01 8.58e-02 8.16e-02 4.24e-01 4.73e-01 ph/cm2/s
90%_error_low -8.69e-02 -4.45e-02 -3.99e-02 N/A -1.41e-01 -1.55e-01 ph/cm2/s
90%_error_hi 8.74e-02 5.64e-02 4.20e-02 N/A 1.36e-01 1.44e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-50.0 keV image (Event data)
#RAcent DECcent POSerr Theta Phi Peak_Cts SNR Name 218.272 -35.197 0.000 23.359 -24.610 0.707 9.022 TRIG_00649916 Image time interval: 0.000 to 64.000 [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 -26.456 sec. to 45.624 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.84257 ( -0.270512 0.256592 ) Norm@50keV : 8.97293E-04 ( -0.000140304 0.000135094 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 51.02 using 59 PHA bins. # Reduced chi-squared = 0.8952 for 57 degrees of freedom # Null hypothesis probability = 6.975636e-01 Photon flux (15-150 keV) in 72.08 sec: 0.125752 ( -0.016545 0.016581 ) ph/cm2/s Energy fluence (15-150 keV) : 5.9486e-07 ( -9.14465e-08 9.3198e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -26.456 sec. to 45.624 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.69603 ( -0.284395 1.18983 ) Epeak [keV] : 227.217 ( ) Norm@50keV : 3.59370E-04 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 49.91 using 59 PHA bins. # Reduced chi-squared = 0.8913 for 56 degrees of freedom # Null hypothesis probability = 7.032290e-01 Photon flux (15-150 keV) in 72.08 sec: 0.103248 ( -0.0254344 0.027201 ) ph/cm2/s Energy fluence (15-150 keV) : 5.16648e-07 ( -1.2225e-07 1.00735e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 15.100 sec. to 16.100 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.72414 ( -0.648794 0.595866 ) Norm@50keV : 3.15640E-03 ( -0.00117207 0.00109912 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 37.34 using 59 PHA bins. # Reduced chi-squared = 0.6551 for 57 degrees of freedom # Null hypothesis probability = 9.795641e-01 Photon flux (15-150 keV) in 1 sec: 0.422821 ( -0.135811 0.136187 ) ph/cm2/s Energy fluence (15-150 keV) : 2.9177e-08 ( -1.06417e-08 1.11374e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 15.100 sec. to 16.100 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.01821 ( -0.00625844 5.21746 ) Epeak [keV] : 7.52429 ( ) Norm@50keV : 2.08881E-03 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 37.11 using 59 PHA bins. # Reduced chi-squared = 0.6627 for 56 degrees of freedom # Null hypothesis probability = 9.757113e-01 Photon flux (15-150 keV) in 1 sec: 0.424380 ( -0.141413 0.136427 ) ph/cm2/s Energy fluence (15-150 keV) : 2.94164e-08 ( -1.1474e-08 8.51772e-09 ) 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 = 0.39265244746, IMY = 0.179854004739
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 -26.456000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.5127 -60.5442 295.1 35.1 -109.4 0.0160 0.0 7.5 Cen X-3 186.6342 -62.7591 1.4 27.1 -110.2 2.3307 8.1 0.9 GX 301-2 244.9806 -15.6294 0.4 39.1 29.8 11.3274 29.2 0.7 Sco X-1 256.0021 -37.8089 0.8 20.7 63.3 3.3728 13.8 2.2 4U 1700-377 256.4534 -36.5425 3.5 22.0 62.4 0.8080 3.3 7.2 GX 349+2 263.1179 -24.7117 26.9 35.1 61.3 0.1867 0.4 6.3 GX 1+4 264.7926 -44.4522 4.6 20.0 90.4 0.6043 2.5 2.1 4U 1735-44 270.2369 -25.1584 5.8 37.8 71.3 1.1933 2.0 5.4 GX 5-1 270.4448 -25.8008 5.6 37.3 72.1 1.1666 2.1 8.4 GRS 1758-258 276.1112 -30.3691 6.0 36.4 83.3 -1.1577 -1.9 9.6 H1820-303 263.0793 -33.6914 9.1 27.2 69.9 0.3936 1.3 9.7 GX 354-0 218.2620 -35.1846 1.6 23.4 -24.6 1.4096 7.1 ------ UNKNOWN 209.5019 -64.7291 1.1 17.5 -119.3 2.1766 10.4 ------ UNKNOWN 48.7157 -67.9348 4.3 57.6 -165.4 2.9216 2.7 ------ UNKNOWN 185.4595 -52.9824 2.8 30.3 -90.8 1.2771 4.1 ------ UNKNOWN 191.1555 -18.1040 3.7 50.6 -44.6 3.5421 3.1 ------ UNKNOWN 138.0303 -64.0770 2.7 46.6 -125.1 3.8537 4.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -26.456000 45.624000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.3974 -60.8153 4.1 35.0 -109.9 0.5295 2.8 11.8 Cen X-3 186.3575 -62.7260 5.8 27.3 -110.1 -0.2664 -2.0 8.6 GX 301-2 244.9265 -15.8052 0.0 38.9 29.7 0.5386 2.8 10.4 Sco X-1 255.7545 -37.8085 2.7 20.6 62.8 -0.4980 -4.2 11.2 4U 1700-377 256.4776 -36.5671 5.2 21.9 62.4 -0.2755 -2.2 8.9 GX 349+2 263.1990 -24.7946 12.6 35.0 61.5 -0.1923 -0.9 10.8 GX 1+4 264.7788 -44.4108 4.3 20.1 90.3 -0.3154 -2.7 2.8 4U 1735-44 270.3855 -24.9627 19.2 38.0 71.3 0.1892 0.6 8.9 GX 5-1 270.2836 -25.9078 4.8 37.2 72.0 0.6880 2.4 9.9 GRS 1758-258 276.0290 -30.2576 16.8 36.4 83.1 0.1993 0.7 8.5 H1820-303 263.0878 -33.7002 6.3 27.2 69.9 -0.2763 -1.8 9.5 GX 354-0 5.4896 -73.9370 2.3 47.1 -178.8 1.0630 5.1 ------ UNKNOWN 218.2858 -35.2005 1.7 23.3 -24.6 0.6886 6.7 ------ UNKNOWN 104.5515 -72.4106 2.3 49.2 -144.5 1.3293 5.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 278.100600 963.018000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9837 -15.6590 0.3 38.2 -139.6 31.6925 41.1 1.2 Sco X-1 255.9744 -37.8542 1.9 42.0 -177.2 4.8595 6.2 0.8 4U 1700-377 256.4659 -36.4367 3.9 40.7 -176.3 2.3058 2.9 1.7 GX 349+2 263.0478 -24.9437 8.1 28.3 -170.4 0.7542 1.4 12.1 GX 1+4 264.7634 -44.5153 9.1 44.1 169.4 1.1843 1.3 4.0 4U 1735-44 268.4834 -1.3490 6.0 13.2 -111.0 0.9100 1.9 9.3 SW J1753.5-0127 270.2581 -25.0372 1.7 24.6 177.4 3.2321 6.7 2.9 GX 5-1 270.2646 -25.7144 2.7 25.2 176.7 2.0690 4.2 2.7 GRS 1758-258 274.1051 -14.0052 2.9 13.3 -174.4 1.9330 3.9 6.1 GX 17+2 275.9147 -30.3489 2.7 27.9 162.6 2.6145 4.3 1.2 H1820-303 285.1694 -24.9970 8.6 22.3 143.5 0.7227 1.4 8.6 HT1900.1-2455 288.8879 11.0685 17.9 15.8 -0.7 0.3069 0.6 9.1 GRS 1915+105 299.5888 35.2107 0.8 41.8 -5.6 13.1022 14.9 0.6 Cyg X-1 308.1021 40.9219 3.2 50.1 -1.8 4.0748 3.6 1.9 Cyg X-3 263.1101 -33.8115 6.7 35.3 179.2 1.0781 1.7 6.2 GX 354-0 316.6649 -5.4169 3.9 35.1 67.3 3.1202 3.0 ------ UNKNOWN 265.6857 -53.4438 3.1 52.1 164.0 7.8806 3.7 ------ UNKNOWN 300.8842 25.3496 3.1 34.0 4.4 2.2758 3.7 ------ UNKNOWN 238.8594 -35.5422 2.5 51.1 -162.7 5.5968 4.6 ------ UNKNOWN 296.2120 53.9903 2.8 58.3 -17.8 11.6763 4.2 ------ UNKNOWN 247.6905 9.5734 2.7 36.0 -97.1 4.9114 4.2 ------ UNKNOWN UNKNOWN UNKNOWN UNKNOWN