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: Fri Jul 29 23:56:49 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1035922
======================================================================
Trigger: 01035922 Segment: 000
BAT Trigger Time: 636663811.072 [s; MET]
Trigger Stop: 636663812.096 [s; MET]
UTC: 2021-03-05T19:03:04.456060 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 319.813864066684 Dec: 34.5566320474194 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 14.41
Image Trigger?: NO
Rate S/N Ratio: 31.2089730686545 [ if not an image trigger ]
Image S/N Ratio: 14.41
Analysis Position: [ source = BAT ]
RA: 319.813864066684 Dec: 34.5566320474194 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 319.808912766838 Dec: 34.5474601345238 [deg; J2000]
{ 21h 19m 14.1s , +34d 32' 50.9" }
+/- 0.720726026706376 [arcmin] (estimated 90% radius based on SNR)
+/- 0.214695586493493 [arcmin] (formal 1-sigma fit error)
SNR: 48.5628091327148
Angular difference between the analysis and refined position is 0.602257 arcmin
Partial Coding Fraction: 0.7421875 [ including projection effects ]
Duration
T90: 67.5239999294281 +/- 4.21072200095712
Measured from: -14.0880000591278
to: 53.4359998703003 [s; relative to TRIGTIME]
T50: 26.0239999294281 +/- 1.3456299985659
Measured from: -0.440000057220459
to: 25.5839998722076 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.259999990463257
to: 1.25999999046326 [s; relative to TRIGTIME]
Total Fluence
Measured from: -21.6480000019073
to: 69.8639999628067 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.742541 4.273590 3.299034 0.728094
0.075910 0.080343 0.070764 0.056850 [error]
Peak 0.074547 0.149961 0.145696 0.044887
0.009320 0.010890 0.010392 0.007311 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 91.512 -21.648 69.864
T90 67.524 -14.088 53.436
T50 26.024 -0.440 25.584
Peak 1.000 0.260 1.260
====== 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 -1.473 -0.044 0.044 - - - 8.28e-03 -2.01e-04 2.01e-04 74.040 57
CPL -0.913 -0.188 0.197 105.273 -14.159 25.943 1.50e-02 -2.67e-03 3.40e-03 46.030 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 -1.102 -0.124 0.125 - - - 2.89e-02 -2.16e-03 2.16e-03 48.700 57
CPL -0.742 -0.414 0.546 192.357 -84.872 -192.357 4.27e-02 -1.51e-02 3.31e-02 47.130 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 9.43e-07 1.76e-06 2.54e-06 7.76e-06 7.22e-06 1.30e-05 erg/cm2
90%_error_low -4.47e-08 -4.95e-08 -7.46e-08 -5.03e-07 -1.84e-07 -5.46e-07 erg/cm2
90%_error_hi 4.54e-08 4.93e-08 7.44e-08 5.26e-07 1.85e-07 5.64e-07 erg/cm2
Peak flux PL 8.14e-01 1.04e+00 9.67e-01 1.58e+00 3.35e+00 4.40e+00 ph/cm2/s
90%_error_low -1.15e-01 -9.34e-02 -8.08e-02 -2.60e-01 -2.57e-01 -3.51e-01 ph/cm2/s
90%_error_hi 1.20e-01 9.24e-02 8.02e-02 2.90e-01 2.57e-01 3.56e-01 ph/cm2/s
Fluence CPL 8.27e-07 1.82e-06 2.65e-06 3.90e-06 6.96e-06 9.20e-06 erg/cm2
90%_error_low -5.62e-08 -5.51e-08 -8.51e-08 -7.23e-07 -2.05e-07 -7.43e-07 erg/cm2
90%_error_hi 5.72e-08 5.54e-08 8.56e-08 9.26e-07 2.04e-07 9.33e-07 erg/cm2
Peak flux CPL 7.52e-01 1.07e+00 1.01e+00 1.09e+00 3.32e+00 3.92e+00 ph/cm2/s
90%_error_low -1.39e-01 -1.04e-01 -9.96e-02 -4.20e-01 -2.61e-01 -4.94e-01 ph/cm2/s
90%_error_hi 1.44e-01 1.06e-01 1.01e-01 5.93e-01 2.61e-01 6.82e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 319.8089 34.5475 0.0040 25.0656 -128.0022 6.3443742 48.563 TRIG_01035922 Foreground time interval of the image: -21.648 12.829 (delta_t = 34.477 [sec]) Background time interval of the image: -239.072 -21.648 (delta_t = 217.424 [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 -21.648 sec. to 69.864 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.47306 ( -0.0442169 0.0442559 ) Norm@50keV : 8.27817E-03 ( -0.000200673 0.000200672 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 74.04 using 59 bins. Reduced chi-squared = 1.29895 # Null hypothesis probability of 6.41e-02 with 57 degrees of freedom Photon flux (15-150 keV) in 91.51 sec: 1.02616 ( -0.027324 0.02739 ) ph/cm2/s Energy fluence (15-150 keV) : 7.22002e-06 ( -1.84138e-07 1.84528e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -21.648 sec. to 69.864 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.912555 ( -0.188372 0.196832 ) Epeak [keV] : 105.273 ( -14.1585 25.9435 ) Norm@50keV : 1.50374E-02 ( -0.00266651 0.00340184 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 46.03 using 59 bins. Reduced chi-squared = 0.821964 # Null hypothesis probability of 8.27e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 91.51 sec: 0.987958 ( -0.029675 0.029772 ) ph/cm2/s Energy fluence (15-150 keV) : 6.95759e-06 ( -2.0456e-07 2.04317e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 0.260 sec. to 1.260 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.10202 ( -0.12377 0.125491 ) Norm@50keV : 2.89143E-02 ( -0.00216399 0.00216222 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 48.70 using 59 bins. Reduced chi-squared = 0.854386 # Null hypothesis probability of 7.75e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 1 sec: 3.35453 ( -0.25714 0.25738 ) ph/cm2/s Energy fluence (15-150 keV) : 3.02141e-07 ( -2.46557e-08 2.47779e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.260 sec. to 1.260 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.741878 ( -0.413886 0.545989 ) Epeak [keV] : 192.357 ( -84.8734 -192.358 ) Norm@50keV : 4.27385E-02 ( -0.015096 0.0330887 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 47.13 using 59 bins. Reduced chi-squared = 0.841607 # Null hypothesis probability of 7.95e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 1 sec: 3.32156 ( -0.26134 0.26134 ) ph/cm2/s Energy fluence (15-150 keV) : 2.97208e-07 ( -2.62076e-08 2.59166e-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 = -2.879613186281215E-01, IMY = 3.685438577558459E-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: -239.072000 -21.648000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.4625 35.4708 10.6 31.9 96.2 -0.4631 -1.1 7.7 Her X-1 268.3547 -1.4599 6.5 37.0 24.0 0.7642 1.8 0.9 SW J1753.5-0127 270.3993 -24.9709 26.9 56.9 6.3 0.8075 0.4 9.0 GX 5-1 274.0242 -14.0221 6.9 45.5 7.5 0.7639 1.7 1.4 GX 17+2 285.0432 -24.9195 17.3 53.5 -9.3 0.4622 0.7 0.4 HT1900.1-2455 288.7489 10.9623 12.5 17.5 -8.1 -0.2368 -0.9 3.1 GRS 1915+105 299.6504 35.1979 2.0 9.9 -152.6 1.4300 5.7 3.0 Cyg X-1 308.0548 40.9586 2.1 18.7 -153.4 1.3621 5.4 2.5 Cyg X-3 326.1915 38.4748 5.5 30.7 -134.8 0.7660 2.1 9.2 Cyg X-2 263.8811 5.0005 3.0 34.9 36.9 1.6935 3.9 ------ UNKNOWN 285.1580 -23.9631 3.0 52.6 -9.3 2.4093 3.9 ------ UNKNOWN 3.6211 67.4848 2.5 57.3 -170.6 5.1924 4.6 ------ UNKNOWN 330.2608 49.3133 3.0 36.3 -152.5 1.3233 3.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -21.648000 12.828590 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.6322 35.4807 60.3 31.7 96.2 0.0415 0.2 11.9 Her X-1 268.4541 -1.3947 5.4 36.9 23.9 -0.3865 -2.1 6.2 SW J1753.5-0127 270.3694 -25.1168 144.2 57.1 6.3 0.0501 0.1 5.2 GX 5-1 273.9014 -14.0018 6.0 45.5 7.6 -0.4210 -1.9 6.4 GX 17+2 284.8840 -25.0171 4.3 53.7 -9.1 -0.8250 -2.7 10.1 HT1900.1-2455 288.8535 10.9805 11.1 17.4 -8.4 0.1081 1.0 3.9 GRS 1915+105 299.5702 35.0477 4.1 9.8 -152.1 0.2989 2.8 9.3 Cyg X-1 307.9915 40.8318 10.9 18.6 -153.2 0.1145 1.1 9.0 Cyg X-3 325.9390 38.2927 0.0 30.5 -134.6 -0.1159 -0.8 11.1 Cyg X-2 246.7400 63.4135 3.4 45.2 137.4 1.6227 3.4 ------ UNKNOWN 319.8089 34.5475 0.2 25.1 -128.0 6.3438 48.6 ------ UNKNOWN 352.1631 40.0258 3.0 50.8 -136.5 1.9210 3.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 65.428600 962.982600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 288.7042 10.8817 23.2 36.9 5.2 -0.5325 -0.5 6.7 GRS 1915+105 299.5781 35.1948 2.0 16.5 45.6 5.1238 5.7 0.7 Cyg X-1 308.2107 40.9406 1.6 11.1 75.9 5.8217 7.3 4.6 Cyg X-3 326.2370 38.2947 4.6 6.4 -179.8 1.7998 2.5 3.5 Cyg X-2 310.7873 57.3185 4.0 23.5 115.4 3.3310 2.9 ------ UNKNOWN 338.0413 16.1963 2.8 24.6 -98.6 4.5305 4.0 ------ UNKNOWN 32.2298 31.1611 5.7 59.6 -161.3 19.7812 2.0 ------ UNKNOWN