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 v2.48
Process Start Time: Sat Jul 30 00:26:23 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1017711
======================================================================
Trigger: 01017711 Segment: 000
BAT Trigger Time: 632717676.152 [s; MET]
Trigger Stop: 632717676.184 [s; MET]
UTC: 2021-01-19T02:54:09.797180 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 282.804265797649 Dec: -61.8007488114657 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.02
Image Trigger?: NO
Rate S/N Ratio: 49.3659801887899 [ if not an image trigger ]
Image S/N Ratio: 12.02
Analysis Position: [ source = BAT ]
RA: 282.804265797649 Dec: -61.8007488114657 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 282.822328933751 Dec: -61.7665733995358 [deg; J2000]
{ 18h 51m 17.4s , -61d 45' 59.7" }
+/- 1.50176461218237 [arcmin] (estimated 90% radius based on SNR)
+/- 0.48372823800027 [arcmin] (formal 1-sigma fit error)
SNR: 17.0149234487392
Angular difference between the analysis and refined position is 2.113581 arcmin
Partial Coding Fraction: 0.9296875 [ including projection effects ]
Duration
T90: 0.0640000104904175 +/- 0.020396072630595
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
T50: 0.0279999971389771 +/- 0.00800001621246338
Measured from: 0.00800001621246338
to: 0.0360000133514404 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.45799994468689
to: 0.54200005531311 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0800000429153442 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.021271 0.042316 0.046166 0.012320
0.003576 0.004342 0.004291 0.002927 [error]
Peak 0.017522 0.046319 0.040518 0.010518
0.008715 0.008343 0.007470 0.005823 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 0.080 0.000 0.080
T90 0.064 0.000 0.064
T50 0.028 0.008 0.036
Peak 1.000 -0.458 0.542
====== 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 -1.264 -0.169 0.169 - - - 8.75e-02 -9.88e-03 9.88e-03 94.430 57
CPL 0.062 -0.815 1.011 83.491 -16.543 48.904 3.80e-01 -2.22e-01 7.25e-01 85.890 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 -1.203 -0.344 0.355 - - - 7.82e-03 -1.60e-03 1.59e-03 53.770 57
CPL -0.273 -1.179 2.028 101.588 -39.712 -101.588 2.11e-02 -2.11e-02 1.50e-01 52.560 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 7.17e-09 1.52e-08 2.53e-08 9.60e-08 6.98e-08 1.44e-07 erg/cm2
90%_error_low -1.30e-09 -1.86e-09 -3.39e-09 -2.39e-08 -8.62e-09 -2.70e-08 erg/cm2
90%_error_hi 1.36e-09 1.84e-09 3.36e-09 2.81e-08 8.66e-09 3.04e-08 erg/cm2
Peak flux PL 2.42e-01 2.91e-01 2.53e-01 3.76e-01 9.18e-01 1.16e+00 ph/cm2/s
90%_error_low -8.91e-02 -7.20e-02 -5.80e-02 -1.53e-01 -1.95e-01 -2.42e-01 ph/cm2/s
90%_error_hi 1.02e-01 7.04e-02 5.71e-02 2.08e-01 1.96e-01 2.48e-01 ph/cm2/s
Fluence CPL 5.57e-09 1.74e-08 2.91e-08 2.49e-08 6.71e-08 7.70e-08 erg/cm2
90%_error_low -1.60e-09 -2.36e-09 -4.30e-09 -1.29e-08 -9.13e-09 -1.53e-08 erg/cm2
90%_error_hi 1.65e-09 2.44e-09 4.43e-09 2.79e-08 9.12e-09 2.73e-08 erg/cm2
Peak flux CPL 1.94e-01 3.08e-01 2.77e-01 1.67e-01 8.81e-01 9.46e-01 ph/cm2/s
90%_error_low -1.05e-01 -8.11e-02 -6.93e-02 -1.67e-01 -2.03e-01 -2.48e-01 ph/cm2/s
90%_error_hi 1.23e-01 8.39e-02 7.29e-02 2.78e-01 2.04e-01 3.60e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 282.8223 -61.7666 0.0113 24.1001 -22.0078 0.1350164 17.015 TRIG_01017711 Foreground time interval of the image: 0.000 0.080 (delta_t = 0.080 [sec]) Background time interval of the image: -239.152 0.000 (delta_t = 239.152 [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 0.000 sec. to 0.080 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.26431 ( -0.169404 0.168782 ) Norm@50keV : 8.74924E-02 ( -0.00988405 0.00987933 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 94.43 using 59 bins. Reduced chi-squared = 1.65667 # Null hypothesis probability of 1.34e-03 with 57 degrees of freedom Photon flux (15-150 keV) in 0.08 sec: 0.491529 ( ) ph/cm2/s Energy fluence (15-150 keV) : 6.97959e-08 ( -8.61728e-09 8.65536e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.080 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 0.0623206 ( -0.814938 1.0106 ) Epeak [keV] : 83.4907 ( -16.5429 48.9046 ) Norm@50keV : 0.380250 ( -0.222277 0.725262 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 85.89 using 59 bins. Reduced chi-squared = 1.53375 # Null hypothesis probability of 6.26e-03 with 56 degrees of freedom Photon flux (15-150 keV) in 0.08 sec: 10.1512 ( -1.20979 1.2042 ) ph/cm2/s Energy fluence (15-150 keV) : 6.71166e-08 ( -9.12704e-09 9.12288e-09 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from -0.458 sec. to 0.542 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.20342 ( -0.343599 0.355231 ) Norm@50keV : 7.82079E-03 ( -0.00159538 0.00159378 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 53.77 using 59 bins. Reduced chi-squared = 0.943333 # Null hypothesis probability of 5.97e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 1 sec: 0.918453 ( -0.194684 0.196117 ) ph/cm2/s Energy fluence (15-150 keV) : 7.92775e-08 ( -1.72663e-08 1.74456e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.458 sec. to 0.542 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.272751 ( -1.17923 2.02798 ) Epeak [keV] : 101.588 ( -39.7121 -101.588 ) Norm@50keV : 2.10990E-02 ( -0.021099 0.150115 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 52.56 using 59 bins. Reduced chi-squared = 0.938571 # Null hypothesis probability of 6.06e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 1 sec: 0.881439 ( -0.202689 0.204261 ) ph/cm2/s Energy fluence (15-150 keV) : 7.52454e-08 ( -1.89439e-08 1.87681e-08 ) 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 = 4.147294229445333E-01, IMY = 1.676269428328477E-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: -239.152000 0.000000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 186.7797 -62.7752 5.1 40.1 54.2 -1.6621 -2.3 3.4 GX 301-2 244.9723 -15.6537 0.6 30.2 179.7 7.6100 18.7 0.9 Sco X-1 256.0039 -37.8623 2.8 7.9 -144.7 1.1670 4.1 1.4 4U 1700-377 256.4138 -36.2726 4.6 9.5 -145.9 0.7342 2.5 9.1 GX 349+2 262.8171 -24.6987 8.6 22.2 -140.3 0.4486 1.3 10.8 GX 1+4 264.5768 -44.5185 6.7 8.7 -76.6 0.5923 1.7 8.2 4U 1735-44 268.1665 -1.3550 0.0 46.0 -143.9 -0.2970 -0.4 13.4 SW J1753.5-0127 270.2191 -25.0379 3.2 24.8 -124.6 1.3762 3.6 4.3 GX 5-1 270.3409 -25.6631 4.6 24.3 -123.6 0.9425 2.5 5.2 GRS 1758-258 273.9742 -13.9404 4.7 36.3 -128.9 1.4175 2.5 6.0 GX 17+2 275.8812 -30.4020 17.4 23.6 -106.9 0.2649 0.7 3.1 H1820-303 285.0536 -24.7631 4.9 33.3 -102.9 -1.3457 -2.4 9.5 HT1900.1-2455 262.7693 -33.7759 7.0 14.0 -127.7 -0.4877 -1.7 11.5 GX 354-0 201.4367 -65.9499 2.1 34.0 48.4 2.9963 5.5 ------ UNKNOWN 279.0162 -3.3377 1.9 48.0 -129.0 8.1121 6.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: 0.000000 0.080000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 186.6567 -62.7760 936.7 40.2 54.2 -0.0002 -0.0 0.3 GX 301-2 244.8967 -15.8068 9.8 30.1 179.5 -0.0104 -1.2 11.1 Sco X-1 256.0164 -37.9847 26.6 7.8 -144.3 -0.0031 -0.4 8.6 4U 1700-377 256.2259 -36.3791 9.6 9.3 -146.6 0.0085 1.2 10.5 GX 349+2 262.7973 -24.6548 0.0 22.3 -140.3 0.0077 1.0 12.8 GX 1+4 264.6229 -44.3252 9.4 8.7 -77.8 0.0093 1.2 9.1 4U 1735-44 268.2861 -1.4938 4.2 45.9 -143.7 0.0452 2.7 5.5 SW J1753.5-0127 270.3383 -25.2112 15.7 24.7 -124.2 -0.0067 -0.7 8.5 GX 5-1 270.1186 -25.6663 4.2 24.2 -124.0 0.0255 2.9 11.0 GRS 1758-258 273.9316 -13.9765 4.6 36.2 -128.9 -0.0305 -2.5 5.6 GX 17+2 276.1592 -30.4187 0.0 23.8 -106.5 -0.0187 -2.1 12.5 H1820-303 285.1902 -24.9443 6.0 33.3 -102.5 0.0282 1.9 8.5 HT1900.1-2455 263.0928 -33.6494 8.9 14.2 -127.0 0.0097 1.3 12.3 GX 354-0 43.8006 -78.1638 2.4 55.4 7.1 0.1652 4.8 ------ UNKNOWN 282.8224 -61.7666 0.7 24.1 -22.0 0.1350 17.0 ------ UNKNOWN 259.3638 -22.6049 3.2 23.4 -149.6 0.0268 3.6 ------ UNKNOWN 284.2661 -22.9966 2.0 34.1 -106.0 0.0822 5.7 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 464.048600 925.448590 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.5735 35.4634 4.0 15.5 -7.7 1.2685 2.9 9.2 Her X-1 288.7439 10.7662 7.3 38.7 -91.4 -2.7242 -1.6 11.2 GRS 1915+105 299.5719 35.1312 3.9 24.9 -135.6 1.6120 3.0 4.3 Cyg X-1 308.0932 40.9455 1.5 28.0 -154.4 4.0823 7.4 0.9 Cyg X-3 326.2697 38.2922 8.1 41.7 -161.1 1.1730 1.4 4.9 Cyg X-2 290.4387 64.9662 2.5 22.1 142.7 2.3371 4.6 ------ UNKNOWN 252.0286 2.5694 2.5 46.0 -35.7 4.4162 4.7 ------ UNKNOWN 330.6812 20.7009 3.6 55.2 -145.0 8.6550 3.2 ------ UNKNOWN