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: Wed Jun 14 15:20:16 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1149250
======================================================================
Trigger: 01149250 Segment: 000
BAT Trigger Time: 695576032 [s; MET]
Trigger Stop: 695576096 [s; MET]
UTC: 2023-01-16T15:33:21.412960 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 223.46306794312 Dec: -16.8714844051089 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 13.88
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 13.88
Analysis Position: [ source = BAT ]
RA: 223.46306794312 Dec: -16.8714844051089 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 223.467132990072 Dec: -16.8828378347964 [deg; J2000]
{ 14h 53m 52.1s , -16d 52' 58.2" }
+/- 1.38765514586551 [arcmin] (estimated 90% radius based on SNR)
+/- 0.753159925701396 [arcmin] (formal 1-sigma fit error)
SNR: 19.0484227988708
Angular difference between the analysis and refined position is 0.720080 arcmin
Partial Coding Fraction: 0.65625 [ including projection effects ]
Duration
T90: 315.871999979019 +/- 53.4216859637062
Measured from: -20.2960000038147
to: 295.575999975204 [s; relative to TRIGTIME]
T50: 117.904000043869 +/- 57.7623406301486
Measured from: 21.1599999666214
to: 139.06400001049 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 247.707999944687
to: 248.707999944687 [s; relative to TRIGTIME]
Total Fluence
Measured from: -35.7999999523163
to: 346.679999947548 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.108276 3.876502 2.496329 0.609698
0.251275 0.249853 0.216416 0.188613 [error]
Peak 0.044973 0.040063 0.036230 0.006156
0.014069 0.014454 0.012072 0.010814 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 382.480 -35.800 346.680
T90 315.872 -20.296 295.576
T50 117.904 21.160 139.064
Peak 1.000 247.708 248.708
====== 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 -1.733 -0.138 0.135 - - - 1.74e-03 -1.39e-04 1.38e-04 54.380 57
CPL -1.559 -0.302 0.561 121.539 -61.400 -121.539 2.15e-03 -4.31e-04 2.01e-03 54.040 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 -2.049 -0.755 0.590 - - - 6.45e-03 -3.04e-03 2.84e-03 51.190 57
CPL -0.619 -1.535 4.323 45.721 -44.545 -45.721 3.74e-02 -3.74e-02 4.90e+00 50.200 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 1.06e-06 1.69e-06 2.03e-06 4.78e-06 6.15e-06 9.56e-06 erg/cm2
90%_error_low -1.27e-07 -1.26e-07 -2.19e-07 -1.00e-06 -5.08e-07 -1.21e-06 erg/cm2
90%_error_hi 1.32e-07 1.26e-07 2.19e-07 1.17e-06 5.13e-07 1.33e-06 erg/cm2
Peak flux PL 4.51e-01 3.29e-01 1.59e-01 1.09e-01 9.90e-01 1.05e+00 ph/cm2/s
90%_error_low -2.14e-01 -1.22e-01 -8.94e-02 -1.09e-01 -3.67e-01 -3.87e-01 ph/cm2/s
90%_error_hi 2.37e-01 1.22e-01 9.22e-02 1.52e-01 3.68e-01 3.89e-01 ph/cm2/s
Fluence CPL 1.03e-06 1.72e-06 2.05e-06 3.59e-06 6.06e-06 8.39e-06 erg/cm2
90%_error_low -1.51e-07 -1.49e-07 -2.26e-07 -1.95e-06 -5.75e-07 -2.05e-06 erg/cm2
90%_error_hi 1.34e-07 1.58e-07 2.29e-07 2.72e-06 5.71e-07 1.63e-06 erg/cm2
Peak flux CPL 3.69e-01 3.86e-01 1.78e-01 3.43e-02 9.60e-01 9.70e-01 ph/cm2/s
90%_error_low -3.69e-01 -1.54e-01 -1.10e-01 -3.43e-02 -3.71e-01 -3.82e-01 ph/cm2/s
90%_error_hi 2.75e-01 1.65e-01 1.20e-01 1.30e-01 3.73e-01 3.87e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 223.4671 -16.8828 0.0101 30.4645 32.0511 4.9544864 19.048 TRIG_01149250 Foreground time interval of the image: -35.800 69.901 (delta_t = 105.701 [sec]) Background time interval of the image: -239.000 -35.800 (delta_t = 203.200 [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 -35.800 sec. to 346.680 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.73281 ( -0.137867 0.13529 ) Norm@50keV : 1.74126E-03 ( -0.000138895 0.000137522 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 54.38 using 59 bins. Reduced chi-squared = 0.954035 # Null hypothesis probability of 5.74e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 382.5 sec: 0.233984 ( -0.0177 0.017747 ) ph/cm2/s Energy fluence (15-150 keV) : 6.15305e-06 ( -5.08339e-07 5.13353e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -35.800 sec. to 346.680 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.55859 ( -0.302475 0.561358 ) Epeak [keV] : 121.539 ( -61.4001 -121.539 ) Norm@50keV : 2.14679E-03 ( -0.000431431 0.0020087 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 54.04 using 59 bins. Reduced chi-squared = 0.965 # Null hypothesis probability of 5.49e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 382.5 sec: 0.231865 ( -0.018755 0.018719 ) ph/cm2/s Energy fluence (15-150 keV) : 6.06152e-06 ( -5.75444e-07 5.70897e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 247.708 sec. to 248.708 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.04943 ( -0.755407 0.589952 ) Norm@50keV : 6.44882E-03 ( -0.00303616 0.00284285 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 51.19 using 59 bins. Reduced chi-squared = 0.89807 # Null hypothesis probability of 6.92e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 1 sec: 0.990039 ( -0.367097 0.367611 ) ph/cm2/s Energy fluence (15-150 keV) : 5.96733e-08 ( -2.47705e-08 2.5859e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 247.708 sec. to 248.708 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.618922 ( -1.52789 4.32936 ) Epeak [keV] : 45.7213 ( -44.5775 -45.7537 ) Norm@50keV : 3.74113E-02 ( -0.0371404 4.90489 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 50.20 using 59 bins. Reduced chi-squared = 0.896429 # Null hypothesis probability of 6.93e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 1 sec: 0.959504 ( -0.37115 0.372636 ) ph/cm2/s Energy fluence (15-150 keV) : 5.77511e-08 ( -2.34633e-08 2.56113e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 315.872 sec. Hardness ratio (energy fluence ratio) = 1.20351059072
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 2.746634e-06 S(50-150 keV) = 3.406469e-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 = 4.985528199833181E-01, IMY = -3.121490077274349E-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: -239.000000 -35.800000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9690 -15.6341 0.5 18.6 -10.7 9.4730 24.4 0.7 Sco X-1 254.4635 35.3357 43.3 33.2 174.4 0.1387 0.3 0.5 Her X-1 255.8888 -37.7078 8.4 41.4 -27.5 -0.9710 -1.4 9.4 4U 1700-377 256.3642 -36.4664 3.4 40.3 -28.5 2.2399 3.4 4.3 GX 349+2 262.8304 -24.7922 8.8 31.6 -45.0 -0.7899 -1.3 10.1 GX 1+4 264.9708 -44.3563 5.0 49.9 -33.6 -3.0117 -2.3 11.3 4U 1735-44 268.4711 -1.6311 0.0 21.9 -95.3 0.9141 1.9 12.4 SW J1753.5-0127 270.3224 -25.1605 5.0 36.0 -54.4 1.6850 2.3 5.3 GX 5-1 270.1874 -25.8318 2.9 36.4 -53.5 2.9438 4.0 8.2 GRS 1758-258 274.1186 -14.1905 0.0 31.8 -73.8 1.0804 1.5 11.3 GX 17+2 276.0333 -30.2435 3.6 43.2 -54.6 3.5738 3.2 9.3 H1820-303 288.9266 11.0023 5.6 42.4 -120.0 2.5619 2.1 8.3 GRS 1915+105 262.8617 -33.9302 9.0 39.7 -37.6 0.8811 1.3 8.5 GX 354-0 214.9436 -28.9702 2.6 44.2 24.9 2.4108 4.4 ------ UNKNOWN 233.4811 18.9766 2.8 20.9 124.9 2.0033 4.2 ------ UNKNOWN 250.6310 50.8910 3.2 48.1 166.3 6.0532 3.6 ------ UNKNOWN 250.4667 -53.7199 2.6 56.6 -19.3 6.7801 4.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -35.800000 69.900600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 245.1194 -15.6866 7.0 18.6 -11.2 0.3341 1.6 8.5 Sco X-1 254.5951 35.3379 4.8 33.3 174.6 0.6451 2.4 6.7 Her X-1 256.1428 -37.7168 6.4 41.4 -27.8 -0.6758 -1.8 10.6 4U 1700-377 256.3746 -36.3528 8.5 40.2 -28.6 -0.4629 -1.4 5.1 GX 349+2 263.0394 -24.6685 2.9 31.6 -45.4 1.3786 4.0 4.9 GX 1+4 264.7678 -44.3774 4.0 49.8 -33.4 2.5094 2.9 4.5 4U 1735-44 268.1849 -1.5411 0.0 21.6 -95.4 0.3637 1.2 12.2 SW J1753.5-0127 270.2610 -25.0630 75.6 35.9 -54.4 0.0649 0.2 1.6 GX 5-1 270.3019 -25.7440 34.2 36.4 -53.7 0.1480 0.3 0.1 GRS 1758-258 273.9488 -14.1512 21.0 31.7 -73.7 0.2342 0.6 7.6 GX 17+2 275.8491 -30.4910 34.9 43.2 -54.2 0.2318 0.3 8.4 H1820-303 288.9603 10.9917 12.3 42.4 -120.0 -0.7650 -0.9 9.9 GRS 1915+105 263.1418 -33.8649 20.2 39.7 -38.0 -0.2400 -0.6 7.8 GX 354-0 213.6667 24.5510 2.6 38.8 110.3 2.8230 4.4 ------ UNKNOWN 223.4671 -16.8828 0.6 30.5 32.1 4.9528 19.0 ------ UNKNOWN 239.9032 18.1397 2.0 16.8 139.3 1.2689 5.8 ------ UNKNOWN 229.5978 -34.8757 2.3 41.1 5.1 1.6338 5.0 ------ UNKNOWN 267.9315 -30.2934 2.3 38.7 -46.4 2.2047 5.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 147.100600 729.500600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.5473 35.4052 33.2 34.3 -145.4 0.4307 0.3 5.8 Her X-1 171.3962 8.6553 2.1 46.4 53.8 12.2631 5.5 ------ UNKNOWN 171.4353 5.4476 3.8 47.8 49.8 8.0689 3.0 ------ UNKNOWN 171.4109 5.8565 3.2 47.6 50.3 9.7100 3.8 ------ UNKNOWN 243.0515 68.6887 3.1 48.2 166.3 14.9854 3.8 ------ UNKNOWN 213.6688 13.9939 3.0 9.8 -3.3 3.2664 3.9 ------ UNKNOWN 244.7622 -9.4346 2.2 42.0 -68.2 14.2359 5.4 ------ UNKNOWN