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 23:33:45 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1099310
======================================================================
Trigger: 01099310 Segment: 000
BAT Trigger Time: 669921411.904 [s; MET]
Trigger Stop: 669921412.928 [s; MET]
UTC: 2022-03-25T17:16:23.058720 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 269.485349385526 Dec: -7.03074025444452 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.22
Image Trigger?: NO
Rate S/N Ratio: 15.8429795177549 [ if not an image trigger ]
Image S/N Ratio: 10.22
Analysis Position: [ source = BAT ]
RA: 269.485349385526 Dec: -7.03074025444452 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 269.469615017896 Dec: -7.0551317384227 [deg; J2000]
{ 17h 57m 52.7s , -07d 03' 18.5" }
+/- 1.46601907636884 [arcmin] (estimated 90% radius based on SNR)
+/- 0.734964046309979 [arcmin] (formal 1-sigma fit error)
SNR: 17.6106774789526
Angular difference between the analysis and refined position is 1.737715 arcmin
Partial Coding Fraction: 0.5234375 [ including projection effects ]
Duration
T90: 3.50399994850159 +/- 0.557641434486111
Measured from: -0.752000093460083
to: 2.7519998550415 [s; relative to TRIGTIME]
T50: 1.37999987602234 +/- 0.404969178192553
Measured from: 0.279999971389771
to: 1.65999984741211 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.531999945640564
to: 1.53199994564056 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.972000002861023
to: 3.01599991321564 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.206988 0.263250 0.091337 0.029800
0.019292 0.019099 0.015638 0.012862 [error]
Peak 0.057730 0.111384 0.035044 0.012827
0.010089 0.010426 0.008792 0.006574 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 3.988 -0.972 3.016
T90 3.504 -0.752 2.752
T50 1.380 0.280 1.660
Peak 1.000 0.532 1.532
====== 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 -2.059 -0.175 0.167 - - - 8.85e-03 -1.03e-03 1.01e-03 69.740 57
CPL -0.701 -0.951 1.283 39.290 -9.312 8.674 5.41e-02 -5.41e-02 2.55e-01 63.170 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 -1.849 -0.232 0.221 - - - 1.42e-02 -2.16e-03 2.12e-03 78.740 57
CPL 0.477 -1.869 3.429 43.505 -6.436 19.780 3.12e-01 -3.12e-01 3.20e+01 73.580 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 7.64e-08 1.00e-07 9.61e-08 1.64e-07 3.27e-07 4.37e-07 erg/cm2
90%_error_low -1.02e-08 -9.50e-09 -1.49e-08 -4.52e-08 -3.52e-08 -6.36e-08 erg/cm2
90%_error_hi 1.05e-08 9.51e-09 1.51e-08 5.51e-08 3.56e-08 7.04e-08 erg/cm2
Peak flux PL 8.16e-01 6.69e-01 3.71e-01 3.03e-01 1.99e+00 2.16e+00 ph/cm2/s
90%_error_low -1.59e-01 -9.01e-02 -7.15e-02 -9.94e-02 -2.70e-01 -2.90e-01 ph/cm2/s
90%_error_hi 1.66e-01 9.00e-02 7.16e-02 1.24e-01 2.70e-01 2.90e-01 ph/cm2/s
Fluence CPL 6.77e-08 1.16e-07 8.85e-08 2.54e-08 2.92e-07 2.98e-07 erg/cm2
90%_error_low -1.23e-08 -1.44e-08 -2.15e-08 -1.90e-08 -3.87e-08 -4.33e-08 erg/cm2
90%_error_hi 1.22e-08 1.52e-08 1.92e-08 5.90e-08 4.17e-08 6.87e-08 erg/cm2
Peak flux CPL 6.41e-01 8.41e-01 3.34e-01 2.66e-02 1.84e+00 1.85e+00 ph/cm2/s
90%_error_low -2.33e-01 -1.64e-01 -1.33e-01 -2.66e-02 -3.11e-01 -3.15e-01 ph/cm2/s
90%_error_hi 2.20e-01 1.76e-01 1.09e-01 1.48e-01 3.05e-01 3.17e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 269.4696 -7.0551 0.0109 38.4231 -25.4348 0.5910721 17.611 TRIG_01099310 Foreground time interval of the image: -0.972 3.016 (delta_t = 3.988 [sec]) Background time interval of the image: -239.904 -0.972 (delta_t = 238.932 [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 -0.972 sec. to 3.016 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.05882 ( -0.175524 0.167354 ) Norm@50keV : 8.85397E-03 ( -0.00103028 0.00101239 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 69.74 using 59 bins. Reduced chi-squared = 1.22351 # Null hypothesis probability of 1.20e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 3.988 sec: 1.36543 ( -0.13143 0.13155 ) ph/cm2/s Energy fluence (15-150 keV) : 3.26945e-07 ( -3.51522e-08 3.55772e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.972 sec. to 3.016 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.700801 ( -0.951991 1.2825 ) Epeak [keV] : 39.2903 ( -9.31124 8.67474 ) Norm@50keV : 5.41372E-02 ( -0.0542169 0.254605 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 63.17 using 59 bins. Reduced chi-squared = 1.12804 # Null hypothesis probability of 2.38e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 3.988 sec: 1.30149 ( -0.13976 0.13917 ) ph/cm2/s Energy fluence (15-150 keV) : 2.92284e-07 ( -3.86982e-08 4.16535e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 0.532 sec. to 1.532 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.84901 ( -0.232339 0.221014 ) Norm@50keV : 1.41730E-02 ( -0.00215606 0.00211571 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 78.74 using 59 bins. Reduced chi-squared = 1.3814 # Null hypothesis probability of 2.98e-02 with 57 degrees of freedom Photon flux (15-150 keV) in 1 sec: 1.99147 ( -0.26961 0.26991 ) ph/cm2/s Energy fluence (15-150 keV) : 1.30341e-07 ( -1.96531e-08 1.99213e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.532 sec. to 1.532 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 0.477153 ( -1.88774 3.41005 ) Epeak [keV] : 43.5052 ( -6.34818 19.8681 ) Norm@50keV : 0.312166 ( -0.33181 32.0057 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 73.58 using 59 bins. Reduced chi-squared = 1.31393 # Null hypothesis probability of 5.76e-02 with 56 degrees of freedom Photon flux (15-150 keV) in 1 sec: 1.84143 ( -0.31086 0.30455 ) ph/cm2/s Energy fluence (15-150 keV) : 1.07406e-07 ( -2.156e-08 2.69014e-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 = 7.163621731427516E-01, IMY = 3.406869026124374E-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: -239.904000 -0.972000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9543 -15.6469 0.6 37.9 16.4 8.6682 19.3 1.5 Sco X-1 254.5921 35.5146 0.0 16.2 -129.8 0.2091 0.7 12.2 Her X-1 263.1260 -24.7694 4.0 50.5 -4.8 1.6145 2.9 6.5 GX 1+4 268.2625 -1.6373 0.0 33.6 -30.0 0.5379 1.6 12.8 SW J1753.5-0127 270.3673 -24.9810 6.2 53.7 -12.1 1.2980 1.9 7.4 GX 5-1 270.3225 -25.6952 6.1 54.3 -11.6 1.3587 1.9 3.1 GRS 1758-258 274.0851 -13.9854 4.9 46.7 -24.1 1.2991 2.3 5.5 GX 17+2 186.6016 66.1629 2.5 56.8 173.8 6.2865 4.7 ------ UNKNOWN 251.2314 59.6020 2.7 37.7 -156.2 1.7744 4.3 ------ UNKNOWN 271.7056 -12.3798 3.5 43.9 -22.9 1.6273 3.3 ------ UNKNOWN 275.1228 -5.6985 2.2 41.3 -33.3 2.4173 5.3 ------ UNKNOWN 272.4614 22.6329 2.6 26.2 -78.6 1.7243 4.5 ------ UNKNOWN 271.5312 51.0681 2.3 35.9 -132.5 2.1166 4.9 ------ UNKNOWN 289.1928 33.6605 4.0 41.2 -98.4 3.7579 3.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -0.972000 3.016000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 245.0700 -15.6916 17.2 37.9 16.2 -0.0239 -0.7 6.1 Sco X-1 254.2855 35.4631 18.8 16.0 -130.4 0.0143 0.6 11.1 Her X-1 263.0317 -24.7650 9.2 50.5 -4.7 0.0661 1.2 1.7 GX 1+4 268.2229 -1.3761 5.1 33.4 -30.3 -0.0646 -2.2 9.8 SW J1753.5-0127 270.1872 -25.1110 4.5 53.7 -11.8 -0.1686 -2.6 5.6 GX 5-1 270.2834 -25.7653 4.2 54.3 -11.5 -0.2001 -2.8 1.7 GRS 1758-258 273.9381 -13.9996 5.3 46.6 -23.9 -0.1059 -2.2 4.5 GX 17+2 238.0251 -27.4805 2.5 50.0 24.8 0.3753 4.6 ------ UNKNOWN 248.7964 -10.5766 2.4 33.1 9.3 0.1432 4.8 ------ UNKNOWN 269.4696 -7.0551 0.7 38.4 -25.4 0.5909 17.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 92.996630 962.128400 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9848 -15.6514 0.5 25.5 69.7 33.8706 24.3 0.7 Sco X-1 254.5922 35.2123 0.0 44.5 164.1 6.9152 2.5 10.2 Her X-1 256.1500 -37.7951 6.4 33.1 21.1 2.7184 1.8 8.3 4U 1700-377 256.5122 -36.4178 3.9 31.7 21.7 4.3089 3.0 3.7 GX 349+2 262.8538 -24.8915 0.0 19.0 20.4 1.6493 1.6 12.2 GX 1+4 264.7489 -44.4490 36.2 37.6 7.1 0.4912 0.3 0.3 4U 1735-44 268.2840 -1.6048 7.4 5.6 169.1 1.5892 1.6 10.4 SW J1753.5-0127 270.3962 -25.0902 3.3 18.1 -1.1 3.4583 3.5 6.1 GX 5-1 270.4652 -25.8883 0.0 18.9 -1.2 0.5153 0.5 12.4 GRS 1758-258 273.9717 -14.0692 4.7 8.3 -30.1 2.4213 2.5 2.8 GX 17+2 275.7753 -30.4905 37.8 24.2 -11.8 0.3373 0.3 10.7 H1820-303 284.8835 -24.9881 5.1 23.2 -36.0 -2.4012 -2.3 9.2 HT1900.1-2455 288.8096 10.9801 5.3 26.3 -131.4 2.8725 2.2 2.2 GRS 1915+105 299.5758 35.1899 0.9 50.9 -146.5 40.0145 13.3 1.0 Cyg X-1 263.1507 -33.8510 2.8 27.5 13.0 4.3536 4.1 8.1 GX 354-0 252.5791 -13.0605 3.7 17.7 70.3 3.6145 3.1 ------ UNKNOWN 259.6617 49.1904 3.2 56.9 173.9 14.8197 3.7 ------ UNKNOWN 301.2600 -58.5733 2.8 57.0 -17.5 13.6949 4.0 ------ UNKNOWN 312.0692 -21.7689 2.7 43.6 -64.1 22.0018 4.3 ------ UNKNOWN