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: Sun Oct 23 23:15:17 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1107466
======================================================================
Trigger: 01107466 Segment: 000
BAT Trigger Time: 674868050.624 [s; MET]
Trigger Stop: 674868050.88 [s; MET]
UTC: 2022-05-21T23:20:21.443840 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 275.196625064596 Dec: 10.3843128192865 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.92
Image Trigger?: NO
Rate S/N Ratio: 21.6333076527839 [ if not an image trigger ]
Image S/N Ratio: 9.92
Analysis Position: [ source = BAT ]
RA: 275.196625064596 Dec: 10.3843128192865 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 275.217901368988 Dec: 10.3722172639446 [deg; J2000]
{ 18h 20m 52.3s , +10d 22' 20.0" }
+/- 1.66376493457738 [arcmin] (estimated 90% radius based on SNR)
+/- 0.519184009420098 [arcmin] (formal 1-sigma fit error)
SNR: 14.6984897206395
Angular difference between the analysis and refined position is 1.450329 arcmin
Partial Coding Fraction: 0.4609375 [ including projection effects ]
Duration
T90: 13.5479999780655 +/- 2.69150143247832
Measured from: -0.059999942779541
to: 13.4880000352859 [s; relative to TRIGTIME]
T50: 9.03199994564056 +/- 3.11905428149317
Measured from: 0.388000011444092
to: 9.41999995708466 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.179999947547913
to: 0.820000052452087 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.227999925613403
to: 16.1680001020432 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.541003 0.558335 0.320867 0.039333
0.057617 0.045100 0.036269 0.030142 [error]
Peak 0.182096 0.216528 0.138646 0.027665
0.016895 0.015244 0.012438 0.007919 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 16.396 -0.228 16.168
T90 13.548 -0.060 13.488
T50 9.032 0.388 9.420
Peak 1.000 -0.180 0.820
====== 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 -1.965 -0.180 0.174 - - - 5.33e-03 -5.63e-04 5.54e-04 54.250 57
CPL -1.304 -0.737 0.884 48.844 -40.641 -48.844 1.19e-02 -6.95e-03 2.23e-02 51.960 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 -1.895 -0.142 0.138 - - - 3.29e-02 -2.92e-03 2.89e-03 74.830 57
CPL -1.193 -0.596 0.688 54.267 -11.309 42.340 7.75e-02 -3.94e-02 9.94e-02 70.710 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 1.73e-07 2.40e-07 2.46e-07 4.59e-07 8.05e-07 1.12e-06 erg/cm2
90%_error_low -2.54e-08 -2.24e-08 -3.52e-08 -1.23e-07 -8.14e-08 -1.59e-07 erg/cm2
90%_error_hi 2.65e-08 2.24e-08 3.54e-08 1.51e-07 8.23e-08 1.79e-07 erg/cm2
Peak flux PL 1.98e+00 1.58e+00 8.49e-01 6.66e-01 4.71e+00 5.08e+00 ph/cm2/s
90%_error_low -2.49e-01 -1.31e-01 -9.59e-02 -1.36e-01 -3.96e-01 -4.11e-01 ph/cm2/s
90%_error_hi 2.58e-01 1.31e-01 9.55e-02 1.55e-01 3.97e-01 4.11e-01 ph/cm2/s
Fluence CPL 1.57e-07 2.55e-07 2.47e-07 1.83e-07 7.62e-07 8.42e-07 erg/cm2
90%_error_low -3.17e-08 -2.81e-08 -3.87e-08 -1.11e-07 -9.17e-08 -1.48e-07 erg/cm2
90%_error_hi 3.21e-08 2.89e-08 3.86e-08 3.18e-07 9.44e-08 3.24e-07 erg/cm2
Peak flux CPL 1.78e+00 1.70e+00 8.86e-01 3.21e-01 4.58e+00 4.68e+00 ph/cm2/s
90%_error_low -3.01e-01 -1.64e-01 -1.08e-01 -1.49e-01 -4.12e-01 -4.51e-01 ph/cm2/s
90%_error_hi 3.06e-01 1.68e-01 1.10e-01 2.76e-01 4.12e-01 4.81e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 275.2179 10.3722 0.0132 29.5142 -78.4563 1.0659374 14.698 TRIG_01107466 Foreground time interval of the image: -0.228 9.477 (delta_t = 9.705 [sec]) Background time interval of the image: -239.624 -0.228 (delta_t = 239.396 [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 -0.228 sec. to 16.168 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.96545 ( -0.180002 0.174056 ) Norm@50keV : 5.32893E-03 ( -0.000562694 0.000554038 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 54.25 using 59 bins. Reduced chi-squared = 0.951754 # Null hypothesis probability of 5.79e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 16.4 sec: 0.786958 ( -0.076502 0.076849 ) ph/cm2/s Energy fluence (15-150 keV) : 8.0483e-07 ( -8.13545e-08 8.22726e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.228 sec. to 16.168 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.30387 ( -0.737171 0.88403 ) Epeak [keV] : 48.8438 ( -40.6411 -48.8439 ) Norm@50keV : 1.19117E-02 ( -0.00694649 0.0223406 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 51.96 using 59 bins. Reduced chi-squared = 0.927857 # Null hypothesis probability of 6.28e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 16.4 sec: 0.756333 ( -0.083871 0.083924 ) ph/cm2/s Energy fluence (15-150 keV) : 7.61893e-07 ( -9.17403e-08 9.44422e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from -0.180 sec. to 0.820 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.89505 ( -0.141641 0.137692 ) Norm@50keV : 3.28924E-02 ( -0.00291629 0.00288603 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 74.83 using 59 bins. Reduced chi-squared = 1.31281 # Null hypothesis probability of 5.67e-02 with 57 degrees of freedom Photon flux (15-150 keV) in 1 sec: 4.71081 ( -0.39586 0.39672 ) ph/cm2/s Energy fluence (15-150 keV) : 3.02441e-07 ( -2.64404e-08 2.66151e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.180 sec. to 0.820 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.19268 ( -0.595581 0.687781 ) Epeak [keV] : 54.2669 ( -11.3086 42.3401 ) Norm@50keV : 7.75055E-02 ( -0.0394213 0.0994487 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 70.71 using 59 bins. Reduced chi-squared = 1.26268 # Null hypothesis probability of 8.92e-02 with 56 degrees of freedom Photon flux (15-150 keV) in 1 sec: 4.58062 ( -0.41157 0.41189 ) ph/cm2/s Energy fluence (15-150 keV) : 2.89728e-07 ( -2.86081e-08 2.87724e-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 = 1.132856191526152E-01, IMY = 5.546484929646723E-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: -239.624000 -0.228000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9744 -15.6457 0.2 10.2 107.6 28.9560 52.1 0.4 Sco X-1 254.4646 35.3893 8.6 45.1 -125.0 2.7319 1.3 2.8 Her X-1 255.9480 -37.9930 3.9 28.3 49.8 2.1916 3.0 9.1 4U 1700-377 256.3481 -36.4601 4.3 26.9 48.8 1.9664 2.7 4.8 GX 349+2 262.8136 -24.8041 9.8 17.5 24.6 -0.6618 -1.2 11.2 GX 1+4 264.7781 -44.3142 9.1 35.9 40.1 1.2647 1.3 8.3 4U 1735-44 268.2648 -1.3465 16.9 16.9 -64.9 0.4252 0.7 8.9 SW J1753.5-0127 270.1980 -25.0416 6.6 22.1 10.0 0.9860 1.8 5.2 GX 5-1 270.4246 -25.7633 11.9 22.7 11.1 0.5385 1.0 6.7 GRS 1758-258 273.9841 -14.0201 59.4 20.5 -22.0 0.1036 0.2 1.6 GX 17+2 276.0045 -30.3769 4.1 29.4 11.7 1.6741 2.8 4.2 H1820-303 285.0060 -24.8890 3.5 33.6 -5.2 -2.2056 -3.3 2.5 HT1900.1-2455 288.9160 10.9045 6.0 40.8 -65.6 -3.1497 -1.9 7.4 GRS 1915+105 263.0314 -33.6932 14.5 25.5 35.2 -0.5485 -0.8 8.7 GX 354-0 294.4702 -32.2495 3.0 44.0 0.9 3.7571 3.9 ------ UNKNOWN 234.4029 29.5242 2.9 43.4 -150.6 3.6010 3.9 ------ UNKNOWN 252.4846 26.9976 3.3 36.7 -127.6 3.1427 3.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -0.228000 9.476590 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9732 -15.7004 1.3 10.2 107.3 0.4118 8.6 3.6 Sco X-1 254.4900 35.2363 3.8 45.0 -125.0 -0.5328 -3.0 6.6 Her X-1 255.7453 -37.8583 14.6 28.2 50.1 0.0502 0.8 11.5 4U 1700-377 256.4898 -36.5957 5.3 27.0 48.6 0.1308 2.2 10.7 GX 349+2 262.8442 -24.7062 10.2 17.4 24.4 -0.0552 -1.1 9.3 GX 1+4 264.7524 -44.6004 31.3 36.2 40.3 -0.0316 -0.4 9.0 4U 1735-44 268.3957 -1.2893 3.8 17.1 -64.9 -0.1539 -3.1 9.9 SW J1753.5-0127 270.3408 -24.9479 8.7 22.1 9.6 -0.0617 -1.3 8.5 GX 5-1 270.4026 -25.8816 10.3 22.7 11.3 -0.0533 -1.1 9.9 GRS 1758-258 274.0938 -14.0189 17.6 20.6 -22.1 -0.0304 -0.7 5.2 GX 17+2 275.7080 -30.4147 107.0 29.3 12.1 -0.0058 -0.1 11.6 H1820-303 284.9492 -24.7382 0.0 33.5 -5.4 -0.0628 -1.1 11.9 HT1900.1-2455 288.7148 10.8864 14.6 40.6 -65.7 -0.1040 -0.8 6.1 GRS 1915+105 262.8567 -33.9032 5.1 25.7 35.7 0.1269 2.3 7.8 GX 354-0 232.2564 16.3546 2.9 33.5 -165.1 0.2066 3.9 ------ UNKNOWN 275.2179 10.3722 0.8 29.5 -78.5 1.0660 14.7 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 79.476590 547.476610 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9765 -15.6565 0.9 39.6 90.2 51.2642 12.4 1.0 Sco X-1 254.4635 35.3721 116.0 31.3 -172.9 0.0831 0.1 1.8 Her X-1 263.2441 -24.7590 0.0 37.0 59.0 -1.9265 -0.8 12.8 GX 1+4 268.3523 -1.6592 0.0 13.8 70.7 1.3048 1.6 12.4 SW J1753.5-0127 270.4146 -25.1621 3.6 35.8 48.2 5.8689 3.2 8.7 GX 5-1 270.4359 -25.8158 3.7 36.5 48.0 5.7978 3.1 8.4 GRS 1758-258 274.0218 -14.0012 4.0 24.4 43.5 2.7924 2.9 2.3 GX 17+2 275.6713 -30.3481 0.0 40.7 40.2 -3.0405 -2.0 13.2 H1820-303 285.0963 -24.9482 27.4 36.6 25.6 0.5665 0.4 3.7 HT1900.1-2455 288.8211 10.7739 17.2 13.4 -52.2 0.5144 0.7 10.4 GRS 1915+105 299.6018 35.2058 0.6 33.3 -101.3 21.2486 17.9 0.6 Cyg X-1 233.3136 19.0801 3.0 41.3 148.0 7.8900 3.9 ------ UNKNOWN 227.8425 29.7952 3.1 48.1 161.8 10.6246 3.7 ------ UNKNOWN 222.3634 43.7568 2.9 56.4 177.1 12.4022 3.9 ------ UNKNOWN 269.9630 16.2616 3.3 7.8 -179.4 2.2408 3.5 ------ UNKNOWN 293.0742 -9.4470 2.4 26.6 -1.7 3.8528 4.8 ------ UNKNOWN 249.1982 48.8502 3.1 44.2 -163.6 4.5934 3.8 ------ UNKNOWN 265.2773 60.5118 2.8 50.7 -145.5 7.9310 4.1 ------ UNKNOWN