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 14:37:13 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger977310
======================================================================
Trigger: 00977310 Segment: 000
BAT Trigger Time: 613629602.24 [s; MET]
Trigger Stop: 613629604.288 [s; MET]
UTC: 2020-06-12T04:39:37.140020 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 302.681184324407 Dec: -45.3569592690613 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.04
Image Trigger?: NO
Rate S/N Ratio: 10.0995049383621 [ if not an image trigger ]
Image S/N Ratio: 8.04
Analysis Position: [ source = BAT ]
RA: 302.681184324407 Dec: -45.3569592690613 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 302.704308896624 Dec: -45.3484016389431 [deg; J2000]
{ 20h 10m 49.0s , -45d 20' 54.2" }
+/- 1.26302697009246 [arcmin] (estimated 90% radius based on SNR)
+/- 0.419621573438143 [arcmin] (formal 1-sigma fit error)
SNR: 21.7892961828355
Angular difference between the analysis and refined position is 1.101967 arcmin
Partial Coding Fraction: 0.96875 [ including projection effects ]
Duration
T90: 425.923999905586 +/- 7.26613241710644
Measured from: -1.2039999961853
to: 424.719999909401 [s; relative to TRIGTIME]
T50: 362.324000000954 +/- 20.3069293365221
Measured from: 28.2639999389648
to: 390.587999939919 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 432.432000041008
to: 433.432000041008 [s; relative to TRIGTIME]
Total Fluence
Measured from: -11.9160000085831
to: 433.432000041008 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.326088 3.093774 2.730671 0.667872
0.137391 0.140713 0.127178 0.123017 [error]
Peak 0.012598 0.064282 0.041598 0.030899
0.014024 0.015774 0.014400 0.014362 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 445.348 -11.916 433.432
T90 425.924 -1.204 424.720
T50 362.324 28.264 390.588
Peak 1.000 432.432 433.432
====== 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 -1.386 -0.091 0.090 - - - 1.29e-03 -6.34e-05 6.33e-05 52.680 57
CPL -1.051 -0.330 0.383 148.171 -52.737 -148.171 1.87e-03 -5.93e-04 9.52e-04 50.050 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 -1.216 -0.583 0.613 - - - 8.38e-03 -2.98e-03 2.98e-03 46.200 57
CPL 0.131 -7.360 5.112 82.741 N/A N/A 3.77e-02 N/A N/A 45.320 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 6.57e-07 1.30e-06 1.98e-06 6.63e-06 5.55e-06 1.06e-05 erg/cm2
90%_error_low -5.93e-08 -6.94e-08 -1.25e-07 -8.94e-07 -3.05e-07 -9.84e-07 erg/cm2
90%_error_hi 6.11e-08 6.91e-08 1.25e-07 9.90e-07 3.07e-07 1.06e-06 erg/cm2
Peak flux PL 2.63e-01 3.13e-01 2.70e-01 3.96e-01 9.86e-01 1.24e+00 ph/cm2/s
90%_error_low -1.51e-01 -1.31e-01 -1.09e-01 -2.46e-01 -3.60e-01 -4.41e-01 ph/cm2/s
90%_error_hi 1.86e-01 1.28e-01 1.07e-01 4.11e-01 3.63e-01 4.68e-01 ph/cm2/s
Fluence CPL 6.13e-07 1.33e-06 2.03e-06 4.09e-06 5.40e-06 8.06e-06 erg/cm2
90%_error_low -7.42e-08 -7.86e-08 -1.36e-07 -1.53e-06 -3.44e-07 -1.56e-06 erg/cm2
90%_error_hi 7.55e-08 7.98e-08 1.38e-07 2.49e-06 3.44e-07 2.56e-06 erg/cm2
Peak flux CPL 2.00e-01 3.49e-01 3.05e-01 1.27e-01 9.43e-01 9.79e-01 ph/cm2/s
90%_error_low -2.00e-01 -1.56e-01 N/A -1.27e-01 -3.63e-01 -3.97e-01 ph/cm2/s
90%_error_hi 2.15e-01 1.75e-01 N/A 3.94e-01 3.72e-01 5.43e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 302.7043 -45.3484 0.0088 15.5949 33.1390 1.8240761 21.789 TRIG_00977310 Foreground time interval of the image: -11.916 23.861 (delta_t = 35.777 [sec]) Background time interval of the image: -234.939 -11.916 (delta_t = 223.023 [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
Multiple GTIs in the spectrum tstart tstop -11.916000 200.328000 201.760000 433.432000 XSPEC12>exit XSPEC: quit Photon index: -1.38569 ( -0.0905225 0.0904758 ) ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 1.38569 ( -0.0904758 0.0905225 ) Norm@50keV : 1.29071E-03 ( -6.34442e-05 6.33405e-05 ) ------------------------------------------------------------ Photon flux (15-150 keV) in 443.9 sec: 0.156685 ( -0.007882 0.007894 ) ph/cm2/s Energy fluence (15-150 keV) : 5.55337e-06 ( -3.04746e-07 3.066e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum tstart tstop -11.916000 200.328000 201.760000 433.432000 XSPEC: quit Photon index: -1.05098 ( -0.330061 0.383139 ) ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 1.05098 ( -0.383139 0.330061 ) Epeak [keV] : 148.171 ( -52.7373 -148.171 ) Norm@50keV : 1.86957E-03 ( -0.000593355 0.00095221 ) ------------------------------------------------------------ Photon flux (15-150 keV) in 443.9 sec: 0.153479 ( -0.008563 0.008547 ) ph/cm2/s Energy fluence (15-150 keV) : 5.40164e-06 ( -3.445e-07 3.44485e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 432.432 sec. to 433.432 sec. XSPEC12>exit XSPEC: quit Photon index: -1.21595 ( -0.582462 0.613349 ) ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 1.21595 ( -0.613349 0.582462 ) Norm@50keV : 8.38064E-03 ( -0.00297593 0.00297969 ) ------------------------------------------------------------ Photon flux (15-150 keV) in 1 sec: 0.986008 ( -0.36006 0.363382 ) ph/cm2/s Energy fluence (15-150 keV) : 8.46525e-08 ( -3.20919e-08 3.27832e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 432.432 sec. to 433.432 sec. XSPEC: quit Photon index: 0.131218 ( -7.36045 5.11153 ) ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.131218 ( -5.11153 7.36045 ) Epeak [keV] : 82.7414 ( ) Norm@50keV : 3.76766E-02 ( ) ------------------------------------------------------------ Photon flux (15-150 keV) in 1 sec: 0.943266 ( -0.363306 0.371504 ) ph/cm2/s Energy fluence (15-150 keV) : 7.82438e-08 ( -3.50133e-08 3.53514e-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 = 2.337107950976979E-01, IMY = -1.525807502577834E-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: -234.939410 -11.916000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 264.5296 -44.4666 4.5 37.8 70.0 1.9923 2.5 9.2 4U 1735-44 270.2293 -24.9710 7.1 35.3 103.7 1.0128 1.6 7.1 GX 5-1 270.4327 -25.8641 4.5 34.9 102.3 -1.5424 -2.6 10.1 GRS 1758-258 274.0279 -14.0057 40.4 36.9 123.1 0.2012 0.3 2.2 GX 17+2 275.8213 -30.4624 7.1 29.2 96.0 0.7055 1.6 7.8 H1820-303 284.8728 -24.9423 25.2 22.8 112.9 0.1659 0.5 9.0 HT1900.1-2455 288.6924 10.8958 10.1 46.4 164.9 0.8710 1.1 6.9 GRS 1915+105 263.0062 -33.7600 3.8 39.4 87.1 3.4886 3.0 4.6 GX 354-0 256.7581 -74.0997 2.7 50.7 30.6 4.8549 4.2 ------ UNKNOWN 352.5999 -82.6056 2.4 53.9 8.0 4.1884 4.8 ------ UNKNOWN 32.4585 -72.6478 2.4 58.6 -6.1 7.3592 4.8 ------ UNKNOWN 334.9011 -48.2769 3.4 25.9 -26.1 1.0208 3.4 ------ UNKNOWN 12.9987 -63.5998 2.8 50.9 -16.6 2.4542 4.1 ------ UNKNOWN 339.6037 -21.6047 2.6 28.1 -87.6 1.8384 4.4 ------ UNKNOWN 6.8600 -36.1815 3.4 47.2 -53.2 4.4558 3.4 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -11.916000 23.860600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 264.7550 -44.5756 6.0 37.7 69.8 -0.4178 -1.9 7.6 4U 1735-44 270.4409 -25.1408 7.6 35.1 103.5 -0.2847 -1.5 9.3 GX 5-1 270.4135 -25.8719 4.1 34.9 102.3 0.5261 2.9 9.8 GRS 1758-258 273.9949 -14.1584 7.4 36.8 122.9 0.3054 1.6 7.4 GX 17+2 275.7438 -30.4485 11.0 29.2 96.0 -0.1445 -1.0 10.6 H1820-303 284.9413 -24.7989 9.0 22.8 113.3 0.1329 1.3 8.9 HT1900.1-2455 288.7137 10.8024 6.0 46.3 164.9 -0.3974 -1.9 9.9 GRS 1915+105 263.0284 -33.9611 4.7 39.3 86.8 -0.8049 -2.4 7.8 GX 354-0 302.7043 -45.3484 0.5 15.6 33.1 1.8241 21.8 ------ UNKNOWN 347.3586 -22.7962 1.9 34.3 -80.0 1.0861 6.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 75.460600 200.328000 201.760000 376.260600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 256.1157 -37.7680 13.5 35.1 66.8 0.5412 0.8 7.6 4U 1700-377 256.3908 -36.3921 8.4 35.6 69.0 0.9475 1.4 2.8 GX 349+2 262.7991 -24.7307 0.0 38.0 90.3 0.9960 0.8 11.5 GX 1+4 264.7418 -44.2383 0.0 26.7 59.8 0.7658 1.7 12.7 4U 1735-44 270.1329 -25.1345 11.3 33.0 97.8 0.6183 1.0 8.9 GX 5-1 270.2730 -25.7226 2.9 32.5 97.2 2.3458 4.0 2.0 GRS 1758-258 274.0597 -14.2022 0.0 39.4 114.1 -1.6330 -1.6 10.4 GX 17+2 275.9183 -30.3335 176.0 25.7 97.6 0.0294 0.1 2.0 H1820-303 285.0346 -25.0764 6.2 24.8 120.2 -0.8109 -1.9 9.4 HT1900.1-2455 262.8213 -33.8451 4.8 32.4 77.8 1.4238 2.4 8.4 GX 354-0 198.5501 -68.3262 2.3 53.3 7.6 4.6341 5.1 ------ UNKNOWN 231.0129 -70.1071 3.0 41.9 10.0 1.8009 3.8 ------ UNKNOWN 302.7263 -45.3407 1.0 0.1 -134.3 3.6836 12.0 ------ UNKNOWN 347.3675 -74.3233 2.9 34.9 -38.3 1.7623 3.9 ------ UNKNOWN 340.1052 -4.8362 3.1 52.0 -148.6 4.3260 3.7 ------ UNKNOWN 358.2000 -52.5495 2.9 36.2 -76.9 3.1855 4.0 ------ UNKNOWN 352.7056 -32.8906 3.9 40.1 -109.1 3.3991 2.9 ------ UNKNOWN 345.5041 -8.1948 3.3 52.3 -140.6 5.5062 3.5 ------ UNKNOWN