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 May 18 14:59:11 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger950330
======================================================================
Trigger: 00950330 Segment: 000
BAT Trigger Time: 601350084.672 [s; MET]
Trigger Stop: 601350085.184 [s; MET]
UTC: 2020-01-22T01:41:00.369360 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 209.981071360137 Dec: 27.5655722784293 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.46
Image Trigger?: NO
Rate S/N Ratio: 20.0997512422418 [ if not an image trigger ]
Image S/N Ratio: 11.46
Analysis Position: [ source = BAT ]
RA: 209.981071360137 Dec: 27.5655722784293 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 210.011650510127 Dec: 27.5474091429259 [deg; J2000]
{ 14h 00m 02.8s , +27d 32' 50.7" }
+/- 0.641947341924366 [arcmin] (estimated 90% radius based on SNR)
+/- 0.205608609553126 [arcmin] (formal 1-sigma fit error)
SNR: 57.2953306502242
Angular difference between the analysis and refined position is 1.957929 arcmin
Partial Coding Fraction: 0.78125 [ including projection effects ]
Duration
T90: 190.595999956131 +/- 4.51451347
Measured from: 1.88399994373322
to: 192.479999899864 [s; relative to TRIGTIME]
T50: 18.7999999523163 +/- 1.13329958254393
Measured from: 8.7279999256134
to: 27.5279998779297 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 10.1799999475479
to: 11.1799999475479 [s; relative to TRIGTIME]
Total Fluence
Measured from: -8.82000005245209
to: 229.075999975204 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 5.488153 6.752031 4.933901 1.181403
0.114260 0.119561 0.104084 0.086199 [error]
Peak 0.220643 0.385478 0.405462 0.119006
0.012488 0.015301 0.015030 0.010682 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 237.896 -8.820 229.076
T90 190.596 1.884 192.480
T50 18.800 8.728 27.528
Peak 1.000 10.180 11.180
====== 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 -1.608 -0.046 0.046 - - - 5.04e-03 -1.17e-04 1.17e-04 43.310 57
CPL -1.533 -0.101 0.184 345.794 -345.794 -345.794 5.44e-03 -4.97e-04 1.12e-03 42.810 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 -1.138 -0.071 0.072 - - - 7.82e-02 -3.23e-03 3.23e-03 44.730 57
CPL -0.772 -0.287 0.307 190.276 -61.599 427.094 1.15e-01 -2.91e-02 4.17e-02 39.940 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 1.69e-06 2.91e-06 3.82e-06 1.02e-05 1.12e-05 1.86e-05 erg/cm2
90%_error_low -8.11e-08 -7.98e-08 -1.12e-07 -6.80e-07 -2.70e-07 -7.35e-07 erg/cm2
90%_error_hi 8.29e-08 7.96e-08 1.12e-07 7.13e-07 2.71e-07 7.60e-07 erg/cm2
Peak flux PL 6.00e-04 9.12e-03 1.06e-01 9.21e+00 4.77e-01 9.24e+00 ph/cm2/s
90%_error_low N/A N/A N/A N/A N/A N/A ph/cm2/s
90%_error_hi N/A N/A N/A N/A N/A N/A ph/cm2/s
Fluence CPL 1.66e-06 2.92e-06 3.84e-06 9.21e-06 1.11e-05 1.76e-05 erg/cm2
90%_error_low -1.09e-07 -8.37e-08 -1.23e-07 -1.94e-06 -3.06e-07 -1.97e-06 erg/cm2
90%_error_hi 8.59e-08 8.40e-08 1.24e-07 1.72e-06 3.05e-07 1.24e-06 erg/cm2
Peak flux CPL 2.08e+00 2.91e+00 2.70e+00 2.86e+00 8.97e+00 1.05e+01 ph/cm2/s
90%_error_low -2.34e-01 -1.55e-01 -1.49e-01 -6.70e-01 -4.02e-01 -7.93e-01 ph/cm2/s
90%_error_hi 2.40e-01 1.56e-01 1.51e-01 9.32e-01 4.03e-01 9.97e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 210.0117 27.5474 0.0034 31.0486 -156.8966 5.5724251 57.295 TRIG_00950330 Foreground time interval of the image: -8.820 10.229 (delta_t = 19.049 [sec]) Background time interval of the image: -239.672 -8.820 (delta_t = 230.852 [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 -8.820 sec. to 229.076 sec. XSPEC12>exit XSPEC: quit Photon index: -1.6079 ( -0.0462334 0.046169 ) ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 1.60790 ( -0.046169 0.0462334 ) Norm@50keV : 5.03621E-03 ( -0.000117471 0.000117463 ) ------------------------------------------------------------ Photon flux (15-150 keV) in 237.9 sec: 0.648793 ( -0.017439 0.017513 ) ph/cm2/s Energy fluence (15-150 keV) : 1.11958e-05 ( -2.70461e-07 2.70806e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -8.820 sec. to 229.076 sec. XSPEC: quit Photon index: -1.53349 ( -0.101333 0.184252 ) ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 1.53349 ( -0.184252 0.101333 ) Epeak [keV] : 345.794 ( -345.801 -345.801 ) Norm@50keV : 5.44326E-03 ( -0.000496635 0.00112127 ) ------------------------------------------------------------ Photon flux (15-150 keV) in 237.9 sec: 0.644519 ( -0.02001 0.019447 ) ph/cm2/s Energy fluence (15-150 keV) : 1.11354e-05 ( -3.05961e-07 3.04598e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 10.180 sec. to 11.180 sec. XSPEC12>exit XSPEC: quit Photon index: -1.13804 ( -0.0712034 0.0715814 ) ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 1.13804 ( -0.0715814 0.0712034 ) Norm@50keV : 7.81800E-02 ( -0.00323421 0.00323324 ) ------------------------------------------------------------ Photon flux (15-150 keV) in 1 sec: 0.476923 ( ) ph/cm2/s Energy fluence (15-150 keV) : 8.0783e-07 ( -3.63761e-08 3.64568e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 10.180 sec. to 11.180 sec. XSPEC: quit Photon index: -0.772387 ( -0.287296 0.306874 ) ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 0.772387 ( -0.306874 0.287296 ) Epeak [keV] : 190.276 ( -61.5992 427.094 ) Norm@50keV : 0.114545 ( -0.0290724 0.0417011 ) ------------------------------------------------------------ Photon flux (15-150 keV) in 1 sec: 8.97285 ( -0.4025 0.40272 ) ph/cm2/s Energy fluence (15-150 keV) : 7.94877e-07 ( -3.83403e-08 3.82093e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 190.596 sec. Hardness ratio (energy fluence ratio) = 1.31235101835
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 4.605681e-06 S(50-150 keV) = 6.590145e-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 = -5.537327771790653E-01, IMY = 2.362261566597713E-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: -239.672000 -8.820000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 158.3950 -28.9222 3.5 44.2 30.4 1.9804 3.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -8.820000 10.228620 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 157.9719 -30.4025 2.6 45.4 29.1 1.1057 4.5 ------ UNKNOWN 210.0116 27.5474 0.2 31.0 -156.9 5.5723 57.3 ------ UNKNOWN 214.8421 41.2873 2.5 44.4 -165.5 0.6891 4.7 ------ UNKNOWN 231.7206 0.8079 1.8 41.1 -99.9 2.3308 6.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 61.428590 962.400600 1772.328000 1862.424800 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.3911 35.3357 3.6 38.4 -129.0 4.5909 3.2 3.3 Her X-1 190.7315 -15.2267 3.7 46.7 9.9 5.0916 3.2 ------ UNKNOWN 218.0990 52.4126 2.5 25.6 175.6 4.9276 4.6 ------ UNKNOWN 266.9944 35.4583 3.7 48.6 -130.3 12.4742 3.2 ------ UNKNOWN 267.9977 36.5887 2.4 49.3 -131.9 20.5655 4.8 ------ UNKNOWN