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 23:38:31 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1042113
======================================================================
Trigger: 01042113 Segment: 000
BAT Trigger Time: 639708823.296 [s; MET]
Trigger Stop: 639708823.36 [s; MET]
UTC: 2021-04-10T00:53:16.478000 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 269.752937386226 Dec: 45.3707068254686 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.24
Image Trigger?: NO
Rate S/N Ratio: 58.9915248150105 [ if not an image trigger ]
Image S/N Ratio: 7.24
Analysis Position: [ source = BAT ]
RA: 269.752937386226 Dec: 45.3707068254686 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 269.740994496425 Dec: 45.358874981224 [deg; J2000]
{ 17h 58m 57.8s , +45d 21' 31.9" }
+/- 0.739746787136268 [arcmin] (estimated 90% radius based on SNR)
+/- 0.278852168624886 [arcmin] (formal 1-sigma fit error)
SNR: 46.7888682640872
Angular difference between the analysis and refined position is 0.870312 arcmin
Partial Coding Fraction: 0.5546875 [ including projection effects ]
Duration
T90: 52.8759999275208 +/- 4.14596475750822
Measured from: 0.684000015258789
to: 53.5599999427795 [s; relative to TRIGTIME]
T50: 21.0199998617172 +/- 1.57035024751302
Measured from: 4.08000004291534
to: 25.0999999046326 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.73599994182587
to: 2.73599994182587 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.00399994850158691
to: 66.0640000104904 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.588350 2.433746 2.608836 1.084433
0.062638 0.066119 0.062206 0.054314 [error]
Peak 0.063677 0.121140 0.245373 0.118505
0.010664 0.012466 0.014378 0.013476 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 66.068 -0.004 66.064
T90 52.876 0.684 53.560
T50 21.020 4.080 25.100
Peak 1.000 1.736 2.736
====== 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 -1.022 -0.056 0.057 - - - 7.79e-03 -2.30e-04 2.29e-04 64.080 57
CPL -1.021 -0.051 0.063 9999.360 -9999.360 -9999.360 7.84e-03 -2.37e-04 2.12e-04 64.440 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 -0.471 -0.153 0.159 - - - 3.35e-02 -3.06e-03 2.99e-03 50.850 57
CPL -0.462 -0.153 0.162 9999.360 -9999.360 -9999.360 3.38e-02 -2.87e-03 1.69e-02 50.880 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 4.21e-07 1.04e-06 2.04e-06 9.99e-06 5.52e-06 1.35e-05 erg/cm2
90%_error_low -2.81e-08 -4.02e-08 -6.24e-08 -7.48e-07 -1.64e-07 -7.66e-07 erg/cm2
90%_error_hi 2.88e-08 4.00e-08 6.22e-08 7.94e-07 1.64e-07 8.06e-07 erg/cm2
Peak flux PL 7.25e-04 8.34e-03 8.86e-02 6.60e+00 3.80e-01 6.70e+00 ph/cm2/s
90%_error_low -3.61e-04 -3.83e-03 -3.76e-02 -2.17e+00 -1.49e-01 -2.21e+00 ph/cm2/s
90%_error_hi 7.46e-04 7.15e-03 5.90e-02 2.93e+00 2.36e-01 3.00e+00 ph/cm2/s
Fluence CPL 4.20e-07 1.04e-06 2.01e-06 1.00e-05 5.55e-06 1.26e-05 erg/cm2
90%_error_low -2.81e-08 N/A -3.07e-08 N/A -1.92e-07 N/A erg/cm2
90%_error_hi 2.89e-08 N/A 9.40e-08 N/A 1.35e-07 N/A erg/cm2
Peak flux CPL 5.18e-01 9.72e-01 1.40e+00 4.25e+00 3.99e+00 7.21e+00 ph/cm2/s
90%_error_low N/A N/A N/A N/A N/A -1.62e+00 ph/cm2/s
90%_error_hi N/A N/A N/A N/A N/A 7.51e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 269.7410 45.3589 0.0041 31.7336 156.0012 3.6141380 46.789 TRIG_01042113 Foreground time interval of the image: -0.004 8.605 (delta_t = 8.609 [sec]) Background time interval of the image: -160.195 -0.004 (delta_t = 160.191 [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 -0.004 sec. to 66.064 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.02156 ( -0.0560931 0.0566251 ) Norm@50keV : 7.78814E-03 ( -0.000229702 0.000228897 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 64.08 using 59 bins. Reduced chi-squared = 1.12421 # Null hypothesis probability of 2.42e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 66.07 sec: 0.897754 ( -0.027529 0.027667 ) ph/cm2/s Energy fluence (15-150 keV) : 5.52286e-06 ( -1.63734e-07 1.63888e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.004 sec. to 66.064 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.01581 ( -0.0518268 0.0623647 ) Epeak [keV] : 1.00000E+04 ( -10000 -10000 ) Norm@50keV : 7.83296E-03 ( -0.000230181 0.000218434 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 64.42 using 59 bins. Reduced chi-squared = 1.15036 # Null hypothesis probability of 2.06e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 66.07 sec: 0.897421 ( -0.027565 0.02763 ) ph/cm2/s Energy fluence (15-150 keV) : 5.5495e-06 ( -1.92347e-07 1.35023e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 1.736 sec. to 2.736 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.471297 ( -0.152676 0.159473 ) Norm@50keV : 3.34853E-02 ( -0.00306073 0.00299067 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 50.85 using 59 bins. Reduced chi-squared = 0.892105 # Null hypothesis probability of 7.04e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 1 sec: 0.380174 ( -0.148779 0.235892 ) ph/cm2/s Energy fluence (15-150 keV) : 4.56562e-07 ( -3.7508e-08 3.76349e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.736 sec. to 2.736 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.461528 ( -0.153514 0.161847 ) Epeak [keV] : 9999.36 ( -9999.36 -9999.36 ) Norm@50keV : 3.37885E-02 ( -0.0028698 0.0169081 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 50.88 using 59 bins. Reduced chi-squared = 0.908571 # Null hypothesis probability of 6.69e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 1 sec: 3.99308 ( ) ph/cm2/s Energy fluence (15-150 keV) : 4.56825e-07 ( -4.13834e-08 4.08319e-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 = -5.649636120925426E-01, IMY = -2.515239810748552E-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: -160.195410 -0.004000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.5673 35.2405 4.7 36.5 129.9 0.9504 2.4 8.1 Her X-1 268.5243 -1.4829 49.8 31.3 56.9 0.0694 0.2 9.5 SW J1753.5-0127 270.4677 -25.2244 7.3 49.5 32.6 1.1196 1.6 13.2 GX 5-1 270.3737 -25.7279 2.9 50.0 32.4 2.9378 3.9 4.0 GRS 1758-258 274.0259 -14.0806 6.0 38.1 35.8 0.6750 1.9 2.9 GX 17+2 276.0566 -30.3836 19.5 52.3 24.1 -0.5268 -0.6 6.9 H1820-303 285.1664 -24.9484 4.6 45.0 15.5 0.9386 2.5 7.3 HT1900.1-2455 288.6277 11.0753 0.0 9.1 28.6 -0.0376 -0.2 12.7 GRS 1915+105 299.5732 35.1894 1.1 17.0 -152.1 1.8927 10.6 1.1 Cyg X-1 308.2101 41.0925 7.1 25.5 -144.4 0.3264 1.6 9.5 Cyg X-3 326.3023 38.3810 6.0 35.0 -123.3 0.5606 1.9 7.1 Cyg X-2 252.6820 9.4562 1.8 39.4 87.5 4.1862 6.3 ------ UNKNOWN 332.2637 -3.9520 2.7 45.9 -57.0 3.8127 4.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -0.004000 8.604600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.4894 35.5135 7.0 36.7 130.3 0.2153 1.6 10.4 Her X-1 268.3731 -1.4535 220.8 31.4 57.2 -0.0053 -0.1 0.3 SW J1753.5-0127 270.1533 -25.0870 12.9 49.5 33.0 -0.1958 -0.9 7.1 GX 5-1 270.1699 -25.7024 6.6 50.0 32.6 -0.4180 -1.7 7.6 GRS 1758-258 273.8361 -13.9150 8.0 38.0 36.2 0.1618 1.4 12.3 GX 17+2 275.7753 -30.2998 11.6 52.3 24.4 0.2739 1.0 8.7 H1820-303 285.1187 -24.9359 4.9 45.0 15.5 -0.2506 -2.4 4.6 HT1900.1-2455 288.8972 10.9454 6.0 9.2 26.8 0.1046 1.9 5.8 GRS 1915+105 299.5531 35.2625 5.3 17.0 -152.3 -0.1125 -2.2 4.1 Cyg X-1 307.9273 40.8305 5.5 25.2 -144.5 -0.1192 -2.1 11.1 Cyg X-3 326.1784 38.3224 22.5 34.9 -123.3 0.0439 0.5 0.3 Cyg X-2 242.3483 63.9234 3.0 55.4 162.5 1.2723 3.9 ------ UNKNOWN 269.7413 45.3593 0.2 31.7 156.0 3.6201 46.9 ------ UNKNOWN 264.6463 71.1700 2.5 54.1 176.0 0.8954 4.7 ------ UNKNOWN 304.3629 -23.8250 2.7 45.0 -9.4 0.3939 4.3 ------ UNKNOWN 315.3496 -21.3358 3.1 46.8 -23.7 0.4003 3.6 ------ UNKNOWN 331.0162 -11.1977 2.4 49.1 -48.0 1.1830 4.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 60.204600 718.080700 720.704000 962.835700 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.4854 35.3788 2.9 15.3 74.1 3.1870 3.9 2.6 Her X-1 268.3192 -1.5823 22.3 47.0 21.5 0.9028 0.5 8.3 SW J1753.5-0127 288.9090 11.0436 16.0 38.0 -12.0 0.6316 0.7 8.8 GRS 1915+105 299.5971 35.2162 1.3 24.7 -56.8 8.2261 9.1 0.9 Cyg X-1 308.1641 40.9529 8.1 28.1 -75.3 1.3841 1.4 2.4 Cyg X-3 258.8706 49.3118 3.8 8.4 141.6 1.8466 3.0 ------ UNKNOWN 356.7314 67.2051 2.8 47.9 -129.1 11.6297 4.1 ------ UNKNOWN