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: Sat Jul 11 00:00:48 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger644259
======================================================================
Trigger: 00644259 Segment: 000
BAT Trigger Time: 456187772.992 [s; MET]
Trigger Stop: 456187789.376 [s; MET]
UTC: 2015-06-16T22:49:19.264160 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 314.704655959612 Dec: -53.3935296118629 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.26
Image Trigger?: NO
Rate S/N Ratio: 16.9115345252878 [ if not an image trigger ]
Image S/N Ratio: 12.26
Analysis Position: [ source = BAT ]
RA: 314.704655959612 Dec: -53.3935296118629 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 314.712148232386 Dec: -53.4023536225514 [deg; J2000]
{ 20h 58m 50.9s , -53d 24' 08.5" }
+/- 1.16954694878419 [arcmin] (estimated 90% radius based on SNR)
+/- 0.435875366271755 [arcmin] (formal 1-sigma fit error)
SNR: 24.3192565317787
Angular difference between the analysis and refined position is 0.593424 arcmin
Partial Coding Fraction: 0.2890625 [ including projection effects ]
Duration
T90: 608.407999992371 +/- 104.219640720468
Measured from: -30.472000002861
to: 577.93599998951 [s; relative to TRIGTIME]
T50: 108.547999978065 +/- 12.5894971790742
Measured from: 65.8600000143051
to: 174.407999992371 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 93.5839999914169
to: 94.5839999914169 [s; relative to TRIGTIME]
Total Fluence
Measured from: -48.1399999856949
to: 705.776000022888 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 8.654023 11.538063 8.432227 1.844344
0.298362 0.287188 0.241535 0.200517 [error]
Peak 0.100634 0.100453 0.107287 0.031644
0.013932 0.013766 0.012114 0.009574 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 753.916 -48.140 705.776
T90 608.408 -30.472 577.936
T50 108.548 65.860 174.408
Peak 1.000 93.584 94.584
====== 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 -1.661 -0.057 0.057 - - - 2.80e-03 -8.50e-05 8.50e-05 44.530 57
CPL -1.428 -0.224 0.236 131.726 -40.695 868.273 3.60e-03 -7.54e-04 1.01e-03 41.370 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 -1.588 -0.222 0.218 - - - 2.19e-02 -2.83e-03 2.81e-03 60.150 57
CPL -1.354 -0.445 0.913 146.958 -146.958 -146.958 2.84e-02 N/A N/A 59.900 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 3.14e-06 5.22e-06 6.61e-06 1.67e-05 1.96e-05 3.17e-05 erg/cm2
90%_error_low -1.83e-07 -1.79e-07 -2.52e-07 -1.39e-06 -6.14e-07 -1.55e-06 erg/cm2
90%_error_hi 1.88e-07 1.79e-07 2.52e-07 1.48e-06 6.15e-07 1.61e-06 erg/cm2
Peak flux PL 9.81e-01 9.38e-01 6.24e-01 6.46e-01 2.81e+00 3.19e+00 ph/cm2/s
90%_error_low -2.08e-01 -1.28e-01 -1.01e-01 -1.91e-01 -3.67e-01 -4.01e-01 ph/cm2/s
90%_error_hi 2.23e-01 1.27e-01 9.88e-02 2.31e-01 3.68e-01 4.01e-01 ph/cm2/s
Fluence CPL 2.97e-06 5.30e-06 6.73e-06 1.22e-05 1.93e-05 2.73e-05 erg/cm2
90%_error_low -2.35e-07 -1.96e-07 -2.78e-07 -3.03e-06 -6.83e-07 -3.10e-06 erg/cm2
90%_error_hi 2.40e-07 1.97e-07 2.81e-07 4.26e-06 6.81e-07 4.27e-06 erg/cm2
Peak flux CPL 9.34e-01 9.56e-01 6.41e-01 5.09e-01 2.78e+00 3.04e+00 ph/cm2/s
90%_error_low -2.62e-01 -1.40e-01 -1.01e-01 -2.79e-01 -3.81e-01 -5.08e-01 ph/cm2/s
90%_error_hi 2.41e-01 1.45e-01 1.19e-01 1.97e-01 3.80e-01 5.19e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 314.7121 -53.4024 0.0079 40.1680 -123.2269 24.9704569 24.319 TRIG_00644259 Foreground time interval of the image: -48.140 492.809 (delta_t = 540.949 [sec]) Background time interval of the image: -239.992 -48.140 (delta_t = 191.852 [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 -48.140 sec. to 705.776 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.66075 ( -0.0570713 0.0569761 ) Norm@50keV : 2.80031E-03 ( -8.50317e-05 8.50102e-05 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 44.53 using 59 PHA bins. # Reduced chi-squared = 0.7813 for 57 degrees of freedom # Null hypothesis probability = 8.853150e-01 Photon flux (15-150 keV) in 753.9 sec: 0.366972 ( -0.012573 0.012624 ) ph/cm2/s Energy fluence (15-150 keV) : 1.96166e-05 ( -6.13997e-07 6.15135e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -48.140 sec. to 705.776 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.42786 ( -0.223617 0.235622 ) Epeak [keV] : 131.726 ( -40.6963 868.272 ) Norm@50keV : 3.60029E-03 ( -0.000754083 0.00101209 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 41.37 using 59 PHA bins. # Reduced chi-squared = 0.7388 for 56 degrees of freedom # Null hypothesis probability = 9.279019e-01 Photon flux (15-150 keV) in 753.9 sec: 0.360475 ( -0.013898 0.013966 ) ph/cm2/s Energy fluence (15-150 keV) : 1.93078e-05 ( -6.83369e-07 6.80831e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 93.584 sec. to 94.584 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.58792 ( -0.221935 0.217534 ) Norm@50keV : 2.19124E-02 ( -0.00282874 0.00280999 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 60.15 using 59 PHA bins. # Reduced chi-squared = 1.055 for 57 degrees of freedom # Null hypothesis probability = 3.623411e-01 Photon flux (15-150 keV) in 1 sec: 2.80550 ( -0.36683 0.36837 ) ph/cm2/s Energy fluence (15-150 keV) : 2.05263e-07 ( -2.80931e-08 2.82709e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 93.584 sec. to 94.584 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.35384 ( -0.444519 0.91339 ) Epeak [keV] : 146.958 ( -146.964 -146.964 ) Norm@50keV : 2.84429E-02 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 59.90 using 59 PHA bins. # Reduced chi-squared = 1.070 for 56 degrees of freedom # Null hypothesis probability = 3.361131e-01 Photon flux (15-150 keV) in 1 sec: 2.77637 ( -0.38147 0.38 ) ph/cm2/s Energy fluence (15-150 keV) : 2.03161e-07 ( -2.91447e-08 2.91234e-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 = -4.625346132641776E-01, IMY = 7.061034131319260E-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: -239.992000 -48.140000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9892 -15.6351 0.4 25.6 45.8 7.1498 27.1 0.6 Sco X-1 256.0070 -37.7787 2.7 10.2 -25.4 0.8279 4.3 4.0 4U 1700-377 256.5355 -36.4489 5.2 9.2 -19.4 0.4302 2.2 5.1 GX 349+2 262.8692 -24.9004 17.1 8.0 76.4 -0.1236 -0.7 12.0 GX 1+4 264.8734 -44.4618 12.3 12.3 -74.3 -0.1795 -0.9 5.6 4U 1735-44 268.3480 -1.4560 88.5 30.9 104.1 -0.0539 -0.1 1.2 SW J1753.5-0127 270.2776 -25.0278 3.0 8.0 126.3 0.7390 3.8 3.1 GX 5-1 270.3491 -25.7625 8.7 7.3 129.1 0.2464 1.3 2.8 GRS 1758-258 274.0059 -14.0781 4.3 19.5 122.9 0.5855 2.7 2.5 GX 17+2 275.9779 -30.3400 6.8 8.4 179.6 0.3091 1.7 3.2 H1820-303 284.9329 -25.1037 0.0 17.7 171.2 0.2203 1.2 12.3 HT1900.1-2455 263.0828 -33.6716 4.4 3.1 -17.0 0.4857 2.6 10.8 GX 354-0 266.6228 -32.2957 1.5 0.2 -158.3 1.3561 7.6 ------ UNKNOWN 333.3019 -21.8767 3.9 59.5 -161.6 5.3957 3.0 ------ UNKNOWN 197.6286 -59.0879 2.7 52.0 -42.2 4.4555 4.3 ------ UNKNOWN 327.8658 -49.9785 2.9 48.0 -129.1 3.3672 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -48.140000 492.808600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.8351 -15.5077 0.0 25.8 45.8 1.5056 2.2 11.5 Sco X-1 255.9467 -37.8610 2.0 10.2 -25.6 3.0215 5.8 2.1 4U 1700-377 256.3516 -36.5770 8.3 9.4 -19.8 0.7319 1.4 10.1 GX 349+2 263.1634 -24.6803 3.3 8.1 78.8 1.7774 3.5 9.3 GX 1+4 264.8304 -44.4040 4.6 12.2 -74.2 1.2812 2.5 4.7 4U 1735-44 268.3557 -1.5320 15.9 30.8 104.1 -0.7263 -0.7 4.8 SW J1753.5-0127 270.3807 -25.1702 9.7 7.9 127.3 -0.5972 -1.2 7.6 GX 5-1 270.2862 -25.7682 9.5 7.3 128.7 0.6475 1.3 1.7 GRS 1758-258 273.8908 -14.1771 5.1 19.3 122.7 1.3297 2.2 10.8 GX 17+2 275.9232 -30.5213 28.9 8.3 -179.3 -0.1927 -0.4 9.3 H1820-303 285.0159 -24.7757 4.4 17.9 170.4 1.2903 2.6 8.8 HT1900.1-2455 263.1406 -33.6644 0.0 3.1 -17.3 -0.7951 -1.6 12.7 GX 354-0 294.9005 7.8434 2.6 48.4 139.5 11.2468 4.3 ------ UNKNOWN 314.7121 -53.4024 0.5 40.2 -123.2 24.9712 24.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 559.808600 962.143200 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 264.7908 -44.5643 9.1 33.2 66.0 0.9979 1.3 7.2 4U 1735-44 275.8686 -30.4894 34.2 36.1 94.8 -0.3474 -0.3 7.9 H1820-303 285.0348 -24.9233 16.0 36.1 111.6 0.6033 0.7 0.2 HT1900.1-2455 308.9706 -3.5032 3.0 50.1 153.8 4.2217 3.9 ------ UNKNOWN 288.0068 -41.4511 3.8 21.4 94.2 1.1431 3.1 ------ UNKNOWN 314.7427 -53.3532 1.6 0.1 -158.0 1.9056 7.2 ------ UNKNOWN 325.9090 -78.1058 3.3 25.0 -24.2 0.8780 3.5 ------ UNKNOWN 347.6895 -1.3851 3.9 58.7 -159.2 5.9282 3.0 ------ UNKNOWN 21.4701 -48.4924 3.5 40.8 -87.5 4.4423 3.4 ------ UNKNOWN