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: Mon Oct 24 00:26:35 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1075565
======================================================================
Trigger: 01075565 Segment: 000
BAT Trigger Time: 654662840 [s; MET]
Trigger Stop: 654662904 [s; MET]
UTC: 2021-09-30T02:46:52.183340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 197.435314036749 Dec: 48.6229469478518 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.5
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.5
Analysis Position: [ source = BAT ]
RA: 197.435314036749 Dec: 48.6229469478518 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 197.414607591782 Dec: 48.6297429062774 [deg; J2000]
{ 13h 09m 39.5s , +48d 37' 47.1" }
+/- 1.56526689105116 [arcmin] (estimated 90% radius based on SNR)
+/- 0.659913758544728 [arcmin] (formal 1-sigma fit error)
SNR: 16.037436610934
Angular difference between the analysis and refined position is 0.916841 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 11.8119999170303 +/- 1.94082558518738
Measured from: 6.52799999713898
to: 18.3399999141693 [s; relative to TRIGTIME]
T50: 5.53999996185303 +/- 1.23482786623791
Measured from: 8.73199999332428
to: 14.2719999551773 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 8.39999997615814
to: 9.39999997615814 [s; relative to TRIGTIME]
Total Fluence
Measured from: 5.83599996566772
to: 19.2359999418259 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.204113 0.271806 0.161394 0.033417
0.023288 0.024056 0.020767 0.017774 [error]
Peak 0.036767 0.024888 0.022519 0.010085
0.006672 0.006903 0.006052 0.004993 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 13.400 5.836 19.236
T90 11.812 6.528 18.340
T50 5.540 8.732 14.272
Peak 1.000 8.400 9.400
====== 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 -1.578 -0.191 0.187 - - - 3.22e-03 -3.55e-04 3.51e-04 51.430 57
CPL -1.536 -1.088 0.778 482.509 -482.509 -482.509 3.39e-03 -2.23e-03 5.15e-03 51.430 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 -1.758 -0.518 0.447 - - - 5.27e-03 -1.54e-03 1.39e-03 47.640 57
CPL -1.750 -0.527 0.443 9999.340 -9999.330 -9999.340 5.29e-03 -3.16e-03 1.53e-03 47.640 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 5.93e-08 1.04e-07 1.39e-07 3.82e-07 4.05e-07 6.85e-07 erg/cm2
90%_error_low -9.93e-09 -1.09e-08 -2.06e-08 -1.08e-07 -4.84e-08 -1.27e-07 erg/cm2
90%_error_hi 1.03e-08 1.09e-08 2.06e-08 1.34e-07 4.90e-08 1.48e-07 erg/cm2
Peak flux PL 2.78e-01 2.40e-01 1.42e-01 1.26e-01 7.15e-01 7.86e-01 ph/cm2/s
90%_error_low -9.66e-02 -5.36e-02 -5.44e-02 -7.57e-02 -1.59e-01 -1.81e-01 ph/cm2/s
90%_error_hi 1.05e-01 5.35e-02 5.26e-02 1.19e-01 1.59e-01 1.84e-01 ph/cm2/s
Fluence CPL 5.90e-08 1.04e-07 1.39e-07 3.57e-07 4.03e-07 6.59e-07 erg/cm2
90%_error_low -1.16e-08 -1.13e-08 -2.08e-08 -2.45e-07 -5.55e-08 -2.52e-07 erg/cm2
90%_error_hi 9.12e-09 1.40e-08 2.14e-08 5.38e-08 5.00e-08 2.94e-07 erg/cm2
Peak flux CPL 2.60e-01 1.63e-01 6.96e-02 4.81e-02 5.14e-01 5.43e-01 ph/cm2/s
90%_error_low -1.12e-01 -1.63e-01 -6.96e-02 -4.81e-02 -3.40e-01 -2.38e-01 ph/cm2/s
90%_error_hi 1.24e-01 7.55e-02 5.34e-02 5.67e-02 2.11e-01 2.68e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 197.4146 48.6297 0.0121 19.0169 -159.4010 0.7158844 16.037 TRIG_01075565 Foreground time interval of the image: 5.836 19.236 (delta_t = 13.400 [sec]) Background time interval of the image: -239.000 5.836 (delta_t = 244.836 [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 5.836 sec. to 19.236 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.57847 ( -0.190551 0.186826 ) Norm@50keV : 3.22158E-03 ( -0.000355107 0.00035057 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 51.43 using 59 bins. Reduced chi-squared = 0.902281 # Null hypothesis probability of 6.83e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 13.4 sec: 0.411287 ( -0.042606 0.042661 ) ph/cm2/s Energy fluence (15-150 keV) : 4.04878e-07 ( -4.8374e-08 4.90474e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 5.836 sec. to 19.236 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.53584 ( -1.08564 0.779672 ) Epeak [keV] : 482.509 ( -559.235 -559.235 ) Norm@50keV : 3.39190E-03 ( -0.00221677 0.00516008 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 51.43 using 59 bins. Reduced chi-squared = 0.918393 # Null hypothesis probability of 6.48e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 13.4 sec: 0.410541 ( -0.044644 0.043261 ) ph/cm2/s Energy fluence (15-150 keV) : 4.0339e-07 ( -5.54973e-08 5.00139e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 8.400 sec. to 9.400 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.75819 ( -0.517679 0.447097 ) Norm@50keV : 5.26864E-03 ( -0.00154216 0.00139155 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 47.64 using 59 bins. Reduced chi-squared = 0.835789 # Null hypothesis probability of 8.07e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 1 sec: 0.714606 ( -0.159157 0.159169 ) ph/cm2/s Energy fluence (15-150 keV) : 4.85993e-08 ( -1.38032e-08 1.4195e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 8.400 sec. to 9.400 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.03879 ( -0.527073 0.443369 ) Epeak [keV] : 16.0173 ( -9999.35 -9999.36 ) Norm@50keV : 3.58997E-03 ( -0.00146771 0.00322356 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 46.85 using 59 bins. Reduced chi-squared = 0.836607 # Null hypothesis probability of 8.03e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 1 sec: 0.514099 ( -0.33951 0.211065 ) ph/cm2/s Energy fluence (15-150 keV) : 3.48281e-08 ( -1.48631e-08 1.56009e-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 = -3.226216663489579E-01, IMY = 1.212593203626557E-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 5.836000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.0361 30.0979 3.0 58.7 -159.2 5.7947 3.8 ------ UNKNOWN 155.0536 1.4856 2.6 48.3 -39.4 2.8003 4.4 ------ UNKNOWN 174.0198 8.7464 2.5 39.9 -66.1 2.9121 4.7 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: 5.836000 19.236000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 197.4146 48.6298 0.7 19.0 -159.4 0.7160 16.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 123.700600 963.032100 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.5332 35.4622 9.6 43.3 162.2 1.8282 1.2 8.1 Her X-1 122.0348 52.6786 4.5 45.7 21.5 3.9434 2.6 ------ UNKNOWN 123.4650 29.3626 3.7 58.2 -3.8 13.6756 3.1 ------ UNKNOWN 127.5946 25.3796 3.7 58.2 -10.2 11.2050 3.1 ------ UNKNOWN 152.9388 16.4386 3.7 48.3 -39.4 5.0099 3.1 ------ UNKNOWN 219.4698 2.6441 2.7 49.7 -133.0 13.3056 4.2 ------ UNKNOWN