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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
214.3545 -50.5415 0.0037 35.9946 155.8359 2.9405263 52.694 TRIG_00146372
Foreground time interval of the image:
-0.016 8.581 (delta_t = 8.597 [sec])
Background time interval of the image:
-299.920 -0.016 (delta_t = 299.904 [sec])
Lightcurves
Notes:
- 1) The mask-weighted light curves are using the flight position.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
- 4) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
- 5) Time of each bin is in the middle of the bin.
1 s binning
From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval
64 ms binning
Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec
16 ms binning
From T100_start-5 s to T100_start+5 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
8 ms binning
From T100_start-3 s to T100_start+3 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
2 ms binning
From T100_start-1 s to T100_start+1 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Quad-rate summed light curves (from T0-300s to T0+1000s)
Spectral Evolution
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 -0.016 sec. to 209.152 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28632 ( -0.0514322 0.0511753 )
Norm@50keV : 3.05804E-03 ( -8.20517e-05 8.19197e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.62 using 59 PHA bins.
# Reduced chi-squared = 1.064 for 57 degrees of freedom
# Null hypothesis probability = 3.465409e-01
Photon flux (15-150 keV) in 209.2 sec: 0.363929 ( -0.0108483 0.0109038 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.34317e-06 ( -1.74336e-07 1.74579e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.016 sec. to 209.152 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28447 ( -0.0965807 0.0497874 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 3.06861E-03 ( -8.15609e-05 0.000356444 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.70 using 59 PHA bins.
# Reduced chi-squared = 1.084 for 56 degrees of freedom
# Null hypothesis probability = 3.102748e-01
Photon flux (15-150 keV) in 209.2 sec: 0.364170 ( -0.011257 0.010479 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.34447e-06 ( -1.74431e-07 1.70979e-07 ) ergs/cm2
Band function
Time interval is from -0.016 sec. to 209.152 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.02127 ( 0.940972 0.940972 )
beta : -1.29772 ( -0.0723074 0.062864 )
Epeak [keV] : 122.306 ( -104.896 338.597 )
Norm@50keV : 4.48552E-03 ( -0.00148133 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.44 using 59 PHA bins.
# Reduced chi-squared = 1.099 for 55 degrees of freedom
# Null hypothesis probability = 2.859092e-01
Photon flux (15-150 keV) in 209.2 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 20.0541 ( )
R^2/D10^2 : 1.55319E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 390.28 using 59 PHA bins.
# Reduced chi-squared = 6.8470 for 57 degrees of freedom
# Null hypothesis probability = 3.497756e-51
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.516e-07 1.496e-08
25- 50 1.256e-06 5.335e-08
50-150 3.745e-06 1.590e-07
15-150 5.252e-06 1.506e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 1.55683 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 165.68 using 59 PHA bins.
# Reduced chi-squared = 2.9067 for 57 degrees of freedom
# Null hypothesis probability = 1.539698e-12
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.110e-07 2.364e-08
25- 50 1.560e-06 4.634e-08
50-150 3.421e-06 1.036e-07
15-150 5.793e-06 1.695e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.57072 (-0.765952 0.821037)
R1^2/D10^2 : 0.178005 (-0.0455795 0.0654005)
kT2 [keV] : 37.7491 (-4.15368 5.78933)
R2^2/D10^2 : 1.68039E-03 (-0.00058165 0.000747492)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.61 using 59 PHA bins.
# Reduced chi-squared = 1.084 for 55 degrees of freedom
# Null hypothesis probability = 3.116740e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.855e-07 5.408e-08
25- 50 1.470e-06 8.232e-08
50-150 4.343e-06 3.264e-07
15-150 6.398e-06 4.268e-07
Peak spectrum fit
Power-law model
Time interval is from 2.704 sec. to 3.704 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.06755 ( -0.0867257 0.0860947 )
Norm@50keV : 5.40202E-02 ( -0.00254025 0.00253676 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.35 using 59 PHA bins.
# Reduced chi-squared = 1.006 for 57 degrees of freedom
# Null hypothesis probability = 4.620130e-01
Photon flux (15-150 keV) in 1 sec: 6.24775 ( -0.301922 0.302505 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.70782e-07 ( -2.95852e-08 2.96639e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.704 sec. to 3.704 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.06239 ( -0.0889316 0.086521 )
Epeak [keV] : 9998.43 ( -9998.79 -9998.79 )
Norm@50keV : 5.43218E-02 ( -0.00253336 0.0141655 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.38 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 56 degrees of freedom
# Null hypothesis probability = 4.236539e-01
Photon flux (15-150 keV) in 1 sec: 6.24567 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.70395e-07 ( -2.9134e-08 2.996e-08 ) ergs/cm2
Band function
Time interval is from 2.704 sec. to 3.704 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.798518 ( 0.792254 0.792254 )
beta : -1.06841 ( 1.06917 0.0881059 )
Epeak [keV] : 88.6905 ( -95.0586 630.411 )
Norm@50keV : 9.07321E-02 ( -0.0406152 2.33627e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.34 using 59 PHA bins.
# Reduced chi-squared = 1.043 for 55 degrees of freedom
# Null hypothesis probability = 3.883128e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 21.7035 ( )
R^2/D10^2 : 0.225370 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 161.47 using 59 PHA bins.
# Reduced chi-squared = 2.8328 for 57 degrees of freedom
# Null hypothesis probability = 6.311317e-12
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.977e-08 1.880e-09
25- 50 1.037e-07 7.165e-09
50-150 3.647e-07 2.865e-08
15-150 4.882e-07 2.870e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 25.6461 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 147.15 using 59 PHA bins.
# Reduced chi-squared = 2.5815 for 57 degrees of freedom
# Null hypothesis probability = 6.635575e-10
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.386e-08 3.535e-09
25- 50 1.228e-07 6.550e-09
50-150 2.694e-07 1.455e-08
15-150 4.561e-07 2.435e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.50076 (-1.38406 1.57349)
R1^2/D10^2 : 2.73156 (-1.10111 2.12317)
kT2 [keV] : 39.9735 (-6.79386 11.9603)
R2^2/D10^2 : 2.98502E-02 (-0.0154122 0.0226114)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.63 using 59 PHA bins.
# Reduced chi-squared = 1.030 for 55 degrees of freedom
# Null hypothesis probability = 4.139276e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.336e-08 9.700e-09
25- 50 1.141e-07 1.766e-08
50-150 4.241e-07 9.480e-08
15-150 5.816e-07 9.285e-08
Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)
Power-law model
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.08865 ( -0.0581635 0.0577502 )
Norm@50keV : 2.31063E-02 ( -0.000726088 0.000723911 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.05 using 59 PHA bins.
# Reduced chi-squared = 0.7552 for 57 degrees of freedom
# Null hypothesis probability = 9.143215e-01
Photon flux (15-150 keV) in 8.597 sec: 2.67730 ( -0.0882466 0.0885205 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.08448e-06 ( -6.78281e-08 6.79907e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.08254 ( -0.0580529 0.0587591 )
Epeak [keV] : 9997.97 ( -9998.41 -9998.41 )
Norm@50keV : 2.32294E-02 ( -0.00071604 0.00335974 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.11 using 59 PHA bins.
# Reduced chi-squared = 0.7698 for 56 degrees of freedom
# Null hypothesis probability = 8.965510e-01
Photon flux (15-150 keV) in 8.597 sec: 2.67619 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.08354e-06 ( -6.6515e-08 6.86728e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98662 ( -4.98662 -4.98662 )
beta : -1.10881 ( -0.0607503 0.0606591 )
Epeak [keV] : 24.7983 ( -24.7983 3.45829 )
Norm@50keV : 1705.27 ( -51.9968 3.73444e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.97 using 59 PHA bins.
# Reduced chi-squared = 0.7450 for 55 degrees of freedom
# Null hypothesis probability = 9.202120e-01
Photon flux (15-150 keV) in 8.597 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.40e-06
S(50-100 keV) = 2.30e-06
T90 vs. Hardness ratio plot
T90 = 85.0160000026226 sec.
Hardness ratio (energy fluence ratio) = 1.64286
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.52585
Count Ratio (50-100 keV) / (15-25 keV) = 1.35927
Mask shadow pattern
IMX = -6.627495764728174E-01, IMY = -2.973519885657219E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
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:
-299.920000 -0.016000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.2261 -60.5446 13.7 54.5 -177.4 -0.7016 -0.8 5.4 Cen X-3
186.7838 -62.7880 3.7 51.1 173.4 2.5839 3.1 3.6 GX 301-2
244.9764 -15.6373 0.2 32.7 75.6 27.3846 52.6 0.3 Sco X-1
238.8863 23.9701 2.9 47.2 14.9 2.4224 4.0 ------ UNKNOWN
205.1305 -5.3755 2.7 11.0 -53.4 1.0024 4.4 ------ UNKNOWN
152.5326 -52.1909 3.6 59.4 -163.2 5.6142 3.2 ------ UNKNOWN
164.3336 -16.8603 3.5 44.9 -120.0 3.1292 3.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.016000 8.580600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.3626 -60.6768 15.3 54.6 -177.5 0.1005 0.8 3.5 Cen X-3
186.8299 -62.8179 8.6 51.1 173.3 -0.1568 -1.3 5.5 GX 301-2
245.0464 -15.7809 3.2 32.8 75.9 -0.2780 -3.6 9.3 Sco X-1
214.3545 -50.5415 0.2 36.0 155.8 2.9404 52.7 ------ UNKNOWN
198.4700 36.9154 2.6 52.9 -33.2 0.5641 4.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
63.380600 302.109100
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.7065 -60.6222 0.0 26.0 -137.9 0.0043 0.0 11.5 Cen X-3
186.6939 -62.7571 1.0 19.2 -148.3 2.0644 11.0 1.3 GX 301-2
244.9709 -15.6389 0.4 42.7 38.1 13.1940 28.0 0.5 Sco X-1
256.1504 -37.8466 5.5 32.1 74.8 0.7557 2.1 7.8 4U 1700-377
256.5542 -36.5258 11.2 33.1 73.2 0.4200 1.0 8.4 GX 349+2
264.6458 -44.3689 2.7 33.9 91.2 1.8028 4.3 6.4 4U 1735-44
263.1703 -33.8008 8.7 39.0 75.5 0.9942 1.3 9.3 GX 354-0
221.9664 -41.0798 2.6 10.8 24.0 0.8001 4.5 ------ UNKNOWN
214.3701 -50.5303 1.5 0.0 92.6 1.3201 7.9 ------ UNKNOWN
212.8773 -13.8815 2.0 36.7 -10.6 1.2968 5.9 ------ UNKNOWN
149.6636 -43.0591 2.3 43.4 -114.6 4.3236 5.0 ------ UNKNOWN
Plot creation:
Sun May 31 16:30:08 EDT 2015