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 v2.47
Process Start Time: Mon Jun 29 14:49:44 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger974942
======================================================================
Trigger: 00974942 Segment: 000
BAT Trigger Time: 612406620.8 [s; MET]
Trigger Stop: 612406632.96 [s; MET]
UTC: 2020-05-29T00:56:35.779500 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 238.751484339386 Dec: -11.0573217127229 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 16.33
Image Trigger?: NO
Rate S/N Ratio: 19.2613602842582 [ if not an image trigger ]
Image S/N Ratio: 16.33
Analysis Position: [ source = BAT ]
RA: 238.751484339386 Dec: -11.0573217127229 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 238.751991759704 Dec: -11.0799161937531 [deg; J2000]
{ 15h 55m 00.5s , -11d 04' 47.7" }
+/- 1.12117824661886 [arcmin] (estimated 90% radius based on SNR)
+/- 0.422392703980751 [arcmin] (formal 1-sigma fit error)
SNR: 25.8317944285249
Angular difference between the analysis and refined position is 1.355998 arcmin
Partial Coding Fraction: 0.5 [ including projection effects ]
Duration
T90: 79.9159998893738 +/- 7.19582355717513
Measured from: 1.09600007534027
to: 81.0119999647141 [s; relative to TRIGTIME]
T50: 36.5799999237061 +/- 5.16854633688639
Measured from: 9.12400007247925
to: 45.7039999961853 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.49600005149841
to: 2.49600005149841 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.687999963760376
to: 93.4280000925064 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.856158 2.056342 1.290997 0.242431
0.100746 0.089365 0.074186 0.061842 [error]
Peak 0.069692 0.078686 0.054535 0.015281
0.011379 0.010275 0.008820 0.006968 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 94.116 -0.688 93.428
T90 79.916 1.096 81.012
T50 36.580 9.124 45.704
Peak 1.000 1.496 2.496
====== 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 -1.887 -0.100 0.099 - - - 3.60e-03 -2.03e-04 2.01e-04 71.630 57
CPL -1.585 -0.357 0.413 65.289 -17.319 -65.289 5.16e-03 -1.68e-03 3.20e-03 69.770 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 -1.818 -0.275 0.259 - - - 1.35e-02 -2.13e-03 2.07e-03 34.180 57
CPL -1.821 -0.319 0.798 9999.310 N/A N/A 1.34e-02 N/A N/A 34.180 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 6.23e-07 9.05e-07 9.78e-07 1.97e-06 3.11e-06 4.48e-06 erg/cm2
90%_error_low -5.36e-08 -4.73e-08 -7.55e-08 -3.05e-07 -1.74e-07 -3.73e-07 erg/cm2
90%_error_hi 5.51e-08 4.72e-08 7.56e-08 3.42e-07 1.75e-07 3.99e-07 erg/cm2
Peak flux PL 7.53e-01 6.28e-01 3.56e-01 2.99e-01 1.87e+00 2.04e+00 ph/cm2/s
90%_error_low -1.67e-01 -8.92e-02 -7.42e-02 -1.09e-01 -2.66e-01 -2.83e-01 ph/cm2/s
90%_error_hi 1.78e-01 8.87e-02 7.30e-02 1.40e-01 2.67e-01 2.83e-01 ph/cm2/s
Fluence CPL 5.93e-07 9.30e-07 9.85e-07 1.24e-06 3.03e-06 3.75e-06 erg/cm2
90%_error_low -6.48e-08 -5.65e-08 -7.88e-08 -5.19e-07 -2.02e-07 -5.66e-07 erg/cm2
90%_error_hi 6.59e-08 5.74e-08 7.94e-08 8.37e-07 2.02e-07 8.91e-07 erg/cm2
Peak flux CPL 7.56e-01 5.62e-01 2.89e-01 2.50e-01 1.71e+00 1.86e+00 ph/cm2/s
90%_error_low N/A -1.28e-01 -7.29e-02 -1.07e-01 -3.88e-01 N/A ph/cm2/s
90%_error_hi N/A 1.37e-01 5.78e-02 4.54e-02 4.04e-01 N/A ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 238.7520 -11.0799 0.0074 28.9873 61.4414 4.3214260 25.832 TRIG_00974942 Foreground time interval of the image: -0.688 55.701 (delta_t = 56.389 [sec]) Background time interval of the image: -110.299 -0.688 (delta_t = 109.611 [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 -0.688 sec. to 93.428 sec. XSPEC12>exit XSPEC: quit Photon index: -1.88715 ( -0.100206 0.0986717 ) ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 1.88715 ( -0.0986717 0.100206 ) Norm@50keV : 3.59853E-03 ( -0.000202713 0.000201179 ) ------------------------------------------------------------ Photon flux (15-150 keV) in 94.12 sec: 0.513665 ( -0.027882 0.027972 ) ph/cm2/s Energy fluence (15-150 keV) : 3.11409e-06 ( -1.73722e-07 1.74818e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.688 sec. to 93.428 sec. XSPEC: quit Photon index: -1.58485 ( -0.356785 0.412856 ) ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 1.58485 ( -0.412856 0.356785 ) Epeak [keV] : 65.2889 ( -17.3191 -65.2889 ) Norm@50keV : 5.16374E-03 ( -0.00167698 0.00320489 ) ------------------------------------------------------------ Photon flux (15-150 keV) in 94.12 sec: 0.503489 ( -0.030511 0.030588 ) ph/cm2/s Energy fluence (15-150 keV) : 3.03049e-06 ( -2.01622e-07 2.02189e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 1.496 sec. to 2.496 sec. XSPEC12>exit XSPEC: quit Photon index: -1.81829 ( -0.274608 0.25872 ) ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 1.81829 ( -0.25872 0.274608 ) Norm@50keV : 1.34578E-02 ( -0.00213472 0.00207061 ) ------------------------------------------------------------ Photon flux (15-150 keV) in 1 sec: 1.86788 ( -0.26555 0.26672 ) ph/cm2/s Energy fluence (15-150 keV) : 1.2384e-07 ( -1.95698e-08 1.98214e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.496 sec. to 2.496 sec. XSPEC: quit Photon index: -2.09405 ( -0.0459302 1.07111 ) ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 2.09405 ( -1.07111 0.0459302 ) Epeak [keV] : 39.7432 ( ) Norm@50keV : 9.87667E-03 ( ) ------------------------------------------------------------ Photon flux (15-150 keV) in 1 sec: 1.71153 ( -0.38787 0.40356 ) ph/cm2/s Energy fluence (15-150 keV) : 1.2436e-07 ( -2.16577e-08 2.05672e-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 = 2.648529634663633E-01, IMY = -4.866102318631486E-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: -110.299400 -0.688000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9767 -15.6343 0.3 21.6 65.7 7.4339 38.2 0.4 Sco X-1 255.9547 -38.0084 20.5 7.1 -39.3 0.1013 0.6 10.0 4U 1700-377 256.4285 -36.5817 6.5 5.7 -34.6 0.3006 1.8 9.5 GX 349+2 263.0896 -24.8776 26.6 7.5 128.3 0.0736 0.4 9.1 GX 1+4 264.7664 -44.3509 5.4 12.8 -83.7 0.3907 2.2 6.0 4U 1735-44 268.3696 -1.4490 127.1 31.4 125.3 0.0253 0.1 0.2 SW J1753.5-0127 270.4031 -25.1921 7.5 11.0 164.4 0.2466 1.6 9.4 GX 5-1 270.3063 -25.7543 2.9 10.6 166.5 0.6844 4.3 0.7 GRS 1758-258 273.8378 -13.9519 7.6 21.8 147.2 0.2760 1.5 11.0 GX 17+2 275.9233 -30.3722 91.1 13.3 -162.9 -0.0218 -0.1 0.3 H1820-303 285.0348 -24.9180 90.3 22.6 -171.9 -0.0225 -0.1 0.2 HT1900.1-2455 288.7891 10.9239 22.0 50.7 147.0 0.4285 0.5 1.4 GRS 1915+105 262.8627 -33.7574 4.1 2.6 -117.6 0.4445 2.8 7.8 GX 354-0 230.3407 -17.6144 2.2 30.8 40.7 1.1595 5.4 ------ UNKNOWN 248.2253 -74.9584 3.1 43.4 -65.3 3.0746 3.7 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -0.688000 55.700610 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9128 -15.5957 2.1 21.7 65.6 -0.8636 -5.6 4.7 Sco X-1 255.9841 -38.0011 8.6 7.1 -39.4 -0.1498 -1.3 9.4 4U 1700-377 256.3243 -36.2947 6.2 5.5 -32.1 0.2028 1.8 9.4 GX 349+2 263.1567 -24.6792 9.7 7.7 128.3 0.1385 1.2 9.0 GX 1+4 264.9989 -44.5063 3.5 13.0 -84.3 -0.4162 -3.3 11.5 4U 1735-44 268.5286 -1.5501 5.7 31.4 125.6 0.3861 2.0 11.3 SW J1753.5-0127 270.5038 -25.1504 0.0 11.1 164.6 -0.1613 -1.5 12.7 GX 5-1 270.2206 -25.9392 0.0 10.4 167.0 -0.3135 -2.9 12.6 GRS 1758-258 274.0176 -14.1842 5.4 21.7 147.9 0.2758 2.1 8.9 GX 17+2 275.8265 -30.2466 6.0 13.2 -163.5 0.2229 1.9 8.8 H1820-303 284.9264 -25.0455 8.1 22.5 -171.7 0.1775 1.4 9.6 HT1900.1-2455 288.8110 10.9695 6.8 50.8 147.0 -1.1621 -1.7 1.6 GRS 1915+105 262.9457 -33.8553 3.8 2.8 -117.0 -0.3360 -3.0 2.5 GX 354-0 238.7520 -11.0799 0.4 29.0 61.4 4.3211 25.8 ------ UNKNOWN 288.8260 3.6689 1.7 44.7 152.4 1.9563 6.8 ------ UNKNOWN 311.3018 -12.8661 2.3 50.2 -170.2 1.3890 4.9 ------ UNKNOWN 294.0941 -45.5359 2.1 29.2 -122.5 0.8320 5.4 ------ UNKNOWN 262.7658 -74.2951 2.3 42.3 -70.8 2.1783 5.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 193.500640 359.400600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9833 -15.6403 0.2 7.5 72.1 10.1213 50.7 0.2 Sco X-1 254.4627 35.3498 1522.2 48.7 -39.1 -0.0047 -0.0 0.5 Her X-1 255.9140 -37.9728 18.3 31.0 97.2 -0.2228 -0.6 8.4 4U 1700-377 256.6420 -36.4286 10.3 30.0 94.5 0.3957 1.1 10.0 GX 349+2 263.1162 -24.7608 4.7 26.8 67.9 -0.7368 -2.5 5.9 GX 1+4 264.7140 -44.5619 6.2 40.2 95.1 1.6028 1.9 6.8 4U 1735-44 268.5003 -1.4569 8.1 31.0 17.9 -0.3731 -1.4 7.9 SW J1753.5-0127 270.4404 -25.0445 6.2 33.0 63.3 0.7757 1.9 8.7 GX 5-1 270.2431 -25.6947 8.7 33.1 64.5 0.5653 1.3 4.3 GRS 1758-258 274.0536 -13.8655 9.3 34.5 42.3 -0.4488 -1.2 10.6 GX 17+2 275.7776 -30.2927 4.2 39.3 68.8 -1.9136 -2.8 8.8 H1820-303 288.8230 10.9039 8.2 54.3 11.7 1.1867 1.4 2.9 GRS 1915+105 263.0715 -33.7199 22.9 31.7 83.4 -0.1966 -0.5 8.0 GX 354-0 279.1838 -28.2253 2.8 41.4 64.3 3.0768 4.0 ------ UNKNOWN 280.9971 -18.3649 2.6 41.3 49.2 2.3186 4.5 ------ UNKNOWN 281.4431 14.2368 2.3 49.2 3.9 2.2085 5.1 ------ UNKNOWN 191.1914 -20.9229 3.5 46.7 -164.5 1.6320 3.3 ------ UNKNOWN 193.3505 4.8585 2.4 48.0 -129.1 5.9674 4.9 ------ UNKNOWN