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 v2.46
Process Start Time: Mon Jul 15 18:56:15 EDT 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger906654
======================================================================
Trigger: 00906654 Segment: 000
BAT Trigger Time: 581353058.816 [s; MET]
Trigger Stop: 581353059.84 [s; MET]
UTC: 2019-06-04T14:57:15.797160 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 297.586711289614 Dec: -32.9325616929355 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.22
Image Trigger?: NO
Rate S/N Ratio: 15 [ if not an image trigger ]
Image S/N Ratio: 9.22
Analysis Position: [ source = BAT ]
RA: 297.586711289614 Dec: -32.9325616929355 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 297.545241048528 Dec: -32.9748115248214 [deg; J2000]
{ 19h 50m 10.9s , -32d 58' 29.3" }
+/- 1.00088055257068 [arcmin] (estimated 90% radius based on SNR)
+/- 0.336623732055962 [arcmin] (formal 1-sigma fit error)
SNR: 30.3789184002397
Angular difference between the analysis and refined position is 3.284120 arcmin
Partial Coding Fraction: 0.640625 [ including projection effects ]
Duration
T90: 220.175999879837 +/- 4.72111353731662
Measured from: -4.70799994468689
to: 215.46799993515 [s; relative to TRIGTIME]
T50: 132.55999994278 +/- 3.0890283074198
Measured from: 30.2200000286102
to: 162.77999997139 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 157.536000013351
to: 158.536000013351 [s; relative to TRIGTIME]
Total Fluence
Measured from: -39.7760000228882
to: 238.039999961853 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 9.772792 11.383954 7.493327 1.562720
0.173618 0.168877 0.146607 0.127883 [error]
Peak 0.262632 0.316787 0.234964 0.043702
0.013264 0.014488 0.013029 0.008826 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 277.816 -39.776 238.040
T90 220.176 -4.708 215.468
T50 132.560 30.220 162.780
Peak 1.000 157.536 158.536
====== 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 -1.750 -0.044 0.044 - - - 6.67e-03 -1.45e-04 1.45e-04 40.560 57
CPL -1.649 -0.128 0.178 186.252 -111.159 -186.252 7.42e-03 -8.59e-04 1.50e-03 39.560 56
=== 1-s peak 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 -1.606 -0.095 0.093 - - - 5.22e-02 -2.87e-03 2.85e-03 56.230 57
CPL -1.272 -0.342 0.370 111.075 -34.465 4377.185 7.65e-02 -2.37e-02 3.91e-02 53.440 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 2.99e-06 4.72e-06 5.62e-06 1.30e-05 1.71e-05 2.63e-05 erg/cm2
90%_error_low -1.32e-07 -1.17e-07 -1.60e-07 -8.40e-07 -3.80e-07 -9.21e-07 erg/cm2
90%_error_hi 1.35e-07 1.17e-07 1.60e-07 8.80e-07 3.81e-07 9.50e-07 erg/cm2
Peak flux PL 2.38e+00 2.25e+00 1.48e+00 1.51e+00 6.72e+00 7.61e+00 ph/cm2/s
90%_error_low -2.08e-01 -1.23e-01 -1.05e-01 -2.07e-01 -3.56e-01 -3.99e-01 ph/cm2/s
90%_error_hi 2.14e-01 1.22e-01 1.04e-01 2.26e-01 3.57e-01 4.00e-01 ph/cm2/s
Fluence CPL 2.92e-06 4.75e-06 5.65e-06 1.13e-05 1.70e-05 2.46e-05 erg/cm2
90%_error_low -1.77e-07 -1.24e-07 -1.70e-07 -2.33e-06 -4.52e-07 -2.40e-06 erg/cm2
90%_error_hi 1.74e-07 1.24e-07 1.71e-07 1.07e-06 4.42e-07 2.07e-06 erg/cm2
Peak flux CPL 2.23e+00 2.31e+00 1.52e+00 1.05e+00 6.61e+00 7.11e+00 ph/cm2/s
90%_error_low -2.54e-01 -1.39e-01 -1.15e-01 -3.24e-01 -3.73e-01 -5.18e-01 ph/cm2/s
90%_error_hi 2.59e-01 1.41e-01 1.17e-01 4.91e-01 3.74e-01 6.15e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 297.5452 -32.9748 0.0063 33.4275 176.1950 6.7585428 30.379 TRIG_00906654 Foreground time interval of the image: -39.776 18.685 (delta_t = 58.461 [sec]) Background time interval of the image: -239.816 -39.776 (delta_t = 200.040 [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 -39.776 sec. to 238.040 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.75008 ( -0.0443668 0.0442472 ) Norm@50keV : 6.66897E-03 ( -0.000145416 0.000145332 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 40.56 using 59 PHA bins. # Reduced chi-squared = 0.7115 for 57 degrees of freedom # Null hypothesis probability = 9.510564e-01 Photon flux (15-150 keV) in 277.8 sec: 0.901824 ( -0.022981 0.0231 ) ph/cm2/s Energy fluence (15-150 keV) : 1.70975e-05 ( -3.80328e-07 3.80542e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -39.776 sec. to 238.040 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.64927 ( -0.127864 0.177514 ) Epeak [keV] : 186.252 ( -111.158 -186.252 ) Norm@50keV : 7.42494E-03 ( -0.000859264 0.00150103 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 39.56 using 59 PHA bins. # Reduced chi-squared = 0.7065 for 56 degrees of freedom # Null hypothesis probability = 9.528741e-01 Photon flux (15-150 keV) in 277.8 sec: 0.892935 ( -0.027148 0.02734 ) ph/cm2/s Energy fluence (15-150 keV) : 1.69521e-05 ( -4.51736e-07 4.4246e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 157.536 sec. to 158.536 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.60565 ( -0.0945291 0.0930581 ) Norm@50keV : 5.21887E-02 ( -0.00286774 0.00285286 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 56.23 using 59 PHA bins. # Reduced chi-squared = 0.9865 for 57 degrees of freedom # Null hypothesis probability = 5.039996e-01 Photon flux (15-150 keV) in 1 sec: 6.71850 ( -0.35628 0.35662 ) ph/cm2/s Energy fluence (15-150 keV) : 4.87809e-07 ( -2.88541e-08 2.90356e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 157.536 sec. to 158.536 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.27212 ( -0.341828 0.370188 ) Epeak [keV] : 111.075 ( -34.4655 4377.18 ) Norm@50keV : 7.64873E-02 ( -0.0236904 0.0390779 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 53.44 using 59 PHA bins. # Reduced chi-squared = 0.9543 for 56 degrees of freedom # Null hypothesis probability = 5.722488e-01 Photon flux (15-150 keV) in 1 sec: 6.60575 ( -0.3734 0.37367 ) ph/cm2/s Energy fluence (15-150 keV) : 4.77035e-07 ( -3.10811e-08 3.1101e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 220.176 sec. Hardness ratio (energy fluence ratio) = 1.18918589295
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 7.715732e-06 S(50-150 keV) = 9.38182e-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 = -6.586133664231520E-01, IMY = -4.380263022776738E-02
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: -239.816000 -39.776000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9834 -15.6537 0.9 23.0 49.0 9.2558 13.0 0.8 Sco X-1 255.9866 -37.8440 7.3 1.9 -79.3 0.9145 1.6 0.0 4U 1700-377 256.4323 -36.4136 276.0 0.5 -53.5 -0.0233 -0.0 0.6 GX 349+2 263.0105 -24.8863 4.9 12.4 106.4 1.4603 2.3 8.4 GX 1+4 264.5738 -44.2923 24.8 10.1 -133.9 -0.2529 -0.5 11.9 4U 1735-44 268.3865 -1.4878 15.7 36.2 99.2 1.1467 0.7 2.4 SW J1753.5-0127 270.1291 -24.9450 8.0 16.0 128.7 0.9294 1.4 11.7 GX 5-1 270.1474 -25.5834 0.0 15.5 130.4 0.4168 0.7 12.7 GRS 1758-258 273.9948 -14.1825 5.8 26.8 118.8 1.8341 2.0 8.8 GX 17+2 276.0946 -30.2249 0.0 17.1 154.9 -0.7268 -1.2 12.2 H1820-303 285.0362 -24.9389 3.4 26.6 152.5 2.4073 3.4 1.1 HT1900.1-2455 263.1837 -33.7443 91.5 5.7 146.8 -0.0657 -0.1 11.1 GX 354-0 328.7591 -63.4285 3.0 50.3 -134.1 10.5235 3.8 ------ UNKNOWN 333.9037 -58.4593 2.7 53.4 -140.0 12.0873 4.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -39.776000 18.684600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.8108 -15.6751 11.4 23.1 48.6 0.2108 1.0 10.0 Sco X-1 256.2090 -37.7256 0.0 1.7 -83.3 -0.5656 -3.5 12.7 4U 1700-377 256.4307 -36.4302 6.0 0.5 -54.9 0.3033 1.9 0.5 GX 349+2 263.1540 -24.8774 6.1 12.5 106.9 0.3388 1.9 11.2 GX 1+4 264.9351 -44.5714 6.7 10.5 -134.1 -0.2684 -1.7 11.0 4U 1735-44 268.3023 -1.2919 5.8 36.4 99.0 -1.0711 -2.0 10.4 SW J1753.5-0127 270.1304 -24.9191 0.0 16.0 128.7 0.1475 0.8 12.7 GX 5-1 270.1385 -25.7566 5.0 15.4 130.8 -0.4255 -2.3 8.9 GRS 1758-258 274.0088 -13.9923 4.0 26.9 118.6 0.8468 2.9 2.7 GX 17+2 275.9503 -30.5121 4.5 16.9 155.6 0.4332 2.5 8.8 H1820-303 285.2039 -24.9584 6.1 26.7 152.7 0.4165 1.9 9.4 HT1900.1-2455 263.1572 -33.9285 21.8 5.6 148.4 -0.0833 -0.5 10.1 GX 354-0 291.2071 -22.1205 2.3 32.9 153.8 1.3771 5.1 ------ UNKNOWN 297.5453 -32.9748 0.4 33.4 176.2 6.7581 30.4 ------ UNKNOWN 196.0841 -21.2103 2.5 54.5 -12.3 2.1427 4.6 ------ UNKNOWN 306.1092 -67.7975 2.5 41.9 -126.0 1.6770 4.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 104.284600 962.254900 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 255.9020 -37.7729 4.7 34.1 67.2 11.8815 2.4 5.9 4U 1700-377 256.5806 -36.4252 4.2 33.7 69.7 13.1105 2.8 7.0 GX 349+2 263.0065 -24.7540 17.6 31.2 93.4 2.8522 0.7 0.5 GX 1+4 264.7644 -44.3801 16.8 27.8 53.4 2.2944 0.7 4.3 4U 1735-44 268.3900 -1.3246 19.6 41.9 130.3 5.1558 0.6 7.8 SW J1753.5-0127 270.2738 -25.0275 5.9 25.1 98.6 5.6686 1.9 3.2 GX 5-1 270.1860 -25.7617 3.5 24.9 96.9 9.9458 3.3 6.4 GRS 1758-258 274.0305 -14.1619 6.0 28.5 123.0 6.9805 1.9 7.7 GX 17+2 275.7160 -30.4677 0.0 18.8 89.0 -2.5008 -1.0 12.4 H1820-303 285.1656 -24.7888 4.0 13.6 121.0 -6.1374 -2.9 10.6 HT1900.1-2455 288.9028 10.8932 12.6 44.6 165.1 -5.2866 -0.9 6.9 GRS 1915+105 262.8699 -33.6745 8.6 28.9 76.2 5.1968 1.3 11.3 GX 354-0 297.5556 -32.9529 1.1 0.0 111.0 21.5365 10.0 ------ UNKNOWN 306.3657 22.1304 2.7 55.7 -172.9 43.9145 4.4 ------ UNKNOWN 337.6657 -9.2165 3.0 43.9 -116.3 35.9722 3.8 ------ UNKNOWN