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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
235.0014 12.8824 0.0086 41.6928 -175.8384 2.7893551 22.458 TRIG_00519380
Foreground time interval of the image:
-7.308 35.637 (delta_t = 42.945 [sec])
Background time interval of the image:
-239.464 -177.424 (delta_t = 62.040 [sec])
-119.464 -7.308 (delta_t = 112.156 [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 4.096000
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 4.096000
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 4.096000
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)
The mask-weighted light curves based on cleaned DPHs
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 -7.308 sec. to 38.452 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.85266 ( -0.128624 0.131618 )
Norm@50keV : 3.74612E-03 ( -0.000285902 0.000282385 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.83 using 59 PHA bins.
# Reduced chi-squared = 1.278 for 57 degrees of freedom
# Null hypothesis probability = 7.709865e-02
Photon flux (15-150 keV) in 45.76 sec: 0.527125 ( -0.0370451 0.0371543 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.57614e-06 ( -1.20128e-07 1.21088e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -7.308 sec. to 38.452 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.81283 ( -0.50045 0.633642 )
Epeak [keV] : 213.665 ( -218.61 -227.492 )
Norm@50keV : 3.93309E-03 ( -0.00187908 0.00321485 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.81 using 59 PHA bins.
# Reduced chi-squared = 1.300 for 56 degrees of freedom
# Null hypothesis probability = 6.501918e-02
Photon flux (15-150 keV) in 45.76 sec: 0.525703 ( -0.038989 0.038179 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.57029e-06 ( -1.35797e-07 1.26243e-07 ) ergs/cm2
Band function
Time interval is from -7.308 sec. to 38.452 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.54543 ( 1.3256 1.3256 )
beta : -1.91312 ( 1.89129 0.161412 )
Epeak [keV] : 53.8721 ( -38.2512 -38.2512 )
Norm@50keV : 5.76401E-03 ( -0.00222437 1294.48 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.57 using 59 PHA bins.
# Reduced chi-squared = 1.320 for 55 degrees of freedom
# Null hypothesis probability = 5.632075e-02
Photon flux (15-150 keV) in 45.76 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] : 11.5420 ( )
R^2/D10^2 : 0.138929 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 132.47 using 59 PHA bins.
# Reduced chi-squared = 2.3241 for 57 degrees of freedom
# Null hypothesis probability = 6.043963e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.784e-07 2.256e-08
25- 50 5.358e-07 4.530e-08
50-150 4.178e-07 6.795e-08
15-150 1.132e-06 9.404e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 97.3196 (-22.3264 34.7881)
Norm : 2.30814 (-0.231742 0.270301)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.65 using 59 PHA bins.
# Reduced chi-squared = 1.327 for 57 degrees of freedom
# Null hypothesis probability = 4.977156e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.760e-07 3.059e-08
25- 50 4.747e-07 3.720e-08
50-150 7.573e-07 2.533e-07
15-150 1.508e-06 2.750e-07
Double BB
R1^2/D10^2 : 0.765121 ( )
kT2 [keV] : 27.0841 (-6.6491 12.9162)
R2^2/D10^2 : 4.35955E-03 (-0.00311651 0.00820719)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.40 using 59 PHA bins.
#Fit statistic : Chi-Squared = 75.51 using 59 PHA bins.
#Fit statistic : Chi-Squared = 75.08 using 59 PHA bins.
# Reduced chi-squared = 1.480 for 55 degrees of freedom
# Reduced chi-squared = 1.373 for 55 degrees of freedom
# Reduced chi-squared = 1.365 for 55 degrees of freedom
# Null hypothesis probability = 1.187846e-02
# Null hypothesis probability = 3.467013e-02
# Null hypothesis probability = 3.724947e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.803e-07 1.566e-07
25- 50 4.189e-07 1.766e-07
50-150 6.930e-07 3.736e-07
15-150 1.392e-06 5.256e-07
Peak spectrum fit
Power-law model
Time interval is from 3.288 sec. to 4.288 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.83909 ( -0.366896 0.39146 )
Norm@50keV : 8.28486E-03 ( -0.00197214 0.00189532 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.04 using 59 PHA bins.
# Reduced chi-squared = 1.229 for 57 degrees of freedom
# Null hypothesis probability = 1.149513e-01
Photon flux (15-150 keV) in 1 sec: 1.15940 ( -0.237248 0.237723 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.61911e-08 ( -1.76845e-08 1.81825e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.288 sec. to 4.288 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.82866 ( -1.79037 1.46835 )
Epeak [keV] : 477.103 ( )
Norm@50keV : 8.40100E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.04 using 59 PHA bins.
# Reduced chi-squared = 1.251 for 56 degrees of freedom
# Null hypothesis probability = 9.820824e-02
Photon flux (15-150 keV) in 1 sec: 1.15912 ( -0.236846 0.2369 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.61303e-08 ( -2.08215e-08 1.80668e-08 ) ergs/cm2
Band function
Time interval is from 3.288 sec. to 4.288 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.75926 ( -4.75926 -4.75926 )
beta : -2.08329 ( -0.664244 0.484829 )
Epeak [keV] : 26.6564 ( -26.6564 7.69216 )
Norm@50keV : 539.690 ( -108.497 1.08229e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.44 using 59 PHA bins.
# Reduced chi-squared = 1.263 for 55 degrees of freedom
# Null hypothesis probability = 9.106542e-02
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] : 9.81635 (-2.16889 3.1332)
R^2/D10^2 : 0.578993 (-0.379311 0.940941)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.98 using 59 PHA bins.
# Reduced chi-squared = 1.333 for 57 degrees of freedom
# Null hypothesis probability = 4.720034e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.129e-08 5.060e-09
25- 50 2.733e-08 1.025e-08
50-150 1.352e-08 7.538e-09
15-150 5.214e-08 1.990e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 91.8168 (-46.5429 -91.8168)
Norm : 5.21182 (-1.34006 2.0914)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.40 using 59 PHA bins.
# Reduced chi-squared = 1.235 for 57 degrees of freedom
# Null hypothesis probability = 1.094040e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.361e-08 4.553e-09
25- 50 2.311e-08 9.041e-09
50-150 3.563e-08 2.646e-08
15-150 7.235e-08 3.344e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.41239 (-2.20995 2.60255)
R1^2/D10^2 : 1.43892 (-0.967294 1.60854)
kT2 [keV] : 42.3736 (-24.7702 -42.3734)
R2^2/D10^2 : 2.36316E-03 (-0.00222266 0.0413402)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.03 using 59 PHA bins.
# Reduced chi-squared = 1.237 for 55 degrees of freedom
# Null hypothesis probability = 1.114666e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.395e-08 8.190e-09
25- 50 2.414e-08 1.394e-08
50-150 4.144e-08 2.451e-08
15-150 7.953e-08 4.001e-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: 1.85244 ( -0.128898 0.131898 )
Norm@50keV : 3.88117E-03 ( -0.000295947 0.000292265 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.90 using 59 PHA bins.
# Reduced chi-squared = 1.314 for 57 degrees of freedom
# Null hypothesis probability = 5.606970e-02
Photon flux (15-150 keV) in 42.94 sec: 0.546081 ( -0.0383509 0.0384647 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.53234e-06 ( -1.16691e-07 1.17621e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.85573 ( )
Epeak [keV] : 9988.45 ( )
Norm@50keV : 3.86604E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.91 using 59 PHA bins.
# Reduced chi-squared = 1.338 for 56 degrees of freedom
# Null hypothesis probability = 4.651657e-02
Photon flux (15-150 keV) in 42.94 sec: 0.545947 ( -0.040403 0.038118 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.53222e-06 ( -6.7871e-08 1.16651e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.33628 ( 1.33628 1.33628 )
beta : -1.89485 ( 1.89485 0.165096 )
Epeak [keV] : 39.4072 ( -39.4072 -39.4072 )
Norm@50keV : 8.58892E-03 ( -0.00497745 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.65 using 59 PHA bins.
# Reduced chi-squared = 1.357 for 55 degrees of freedom
# Null hypothesis probability = 4.008260e-02
Photon flux (15-150 keV) in 42.94 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) = 4.52e-07
S(50-100 keV) = 5.01e-07
T90 vs. Hardness ratio plot
T90 = 38.7239999175072 sec.
Hardness ratio (energy fluence ratio) = 1.10841
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.26093
Count Ratio (50-100 keV) / (15-25 keV) = 0.749685
Mask shadow pattern
IMX = -8.883938367066269E-01, IMY = 6.464168030272782E-02
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
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:
-239.464000 -177.423600
-119.464000 -7.308000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.2736 -60.5507 12.9 50.1 -19.0 0.3526 0.9 4.5 Cen X-3
186.6687 -62.7966 3.9 47.3 -29.1 1.0874 2.9 1.6 GX 301-2
244.9715 -15.6364 0.3 37.3 -128.0 11.0429 36.4 0.5 Sco X-1
247.9035 22.4770 2.6 57.2 -173.9 4.0891 4.5 ------ UNKNOWN
220.0899 -21.0310 2.5 13.7 -113.7 0.7875 4.7 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-7.308000 35.636600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.4776 -60.6587 7.2 50.1 -19.2 0.2774 1.6 5.2 Cen X-3
186.3170 -62.7789 4.9 47.3 -28.9 -0.3893 -2.3 9.3 GX 301-2
244.9477 -15.5207 3.9 37.3 -128.2 0.3830 3.0 7.4 Sco X-1
177.3688 -7.3766 2.6 29.7 65.2 0.5514 4.5 ------ UNKNOWN
235.0014 12.8824 0.5 41.7 -175.8 2.7891 22.5 ------ UNKNOWN
237.5339 -43.4317 2.6 37.2 -79.9 0.8639 4.4 ------ UNKNOWN
214.2763 -67.3817 2.7 50.2 -45.1 1.5608 4.3 ------ UNKNOWN
241.6313 -46.2916 3.2 41.1 -78.7 1.1087 3.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
117.836600 962.610900
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9706 -15.6411 0.1 30.1 3.2 54.6340 79.4 0.5 Sco X-1
254.4888 35.2964 1.3 28.5 -122.7 8.0306 9.2 3.2 Her X-1
256.0595 -37.8349 8.4 54.4 2.2 3.3680 1.4 3.5 4U 1700-377
256.5530 -36.4098 6.4 53.3 0.9 3.4134 1.8 5.7 GX 349+2
262.9196 -24.8333 9.8 46.5 -13.3 1.3106 1.2 7.2 GX 1+4
268.2701 -1.4241 4.1 35.9 -46.5 2.8160 2.8 6.1 SW J1753.5-0127
270.1953 -25.1654 16.1 51.2 -19.4 -1.0429 -0.7 7.1 GX 5-1
270.3946 -25.7172 22.6 51.7 -19.1 -0.7659 -0.5 5.2 GRS 1758-258
274.0848 -13.8263 0.0 47.0 -34.2 2.3569 1.8 13.4 GX 17+2
275.9249 -30.3671 108.5 58.4 -19.0 0.3595 0.1 0.0 H1820-303
262.8275 -33.7534 6.2 53.6 -6.2 3.0922 1.9 9.4 GX 354-0
250.5470 -31.5728 2.1 46.8 4.4 6.1882 5.5 ------ UNKNOWN
255.4572 -27.6126 2.5 45.0 -3.3 5.0088 4.6 ------ UNKNOWN
250.5416 28.1659 2.6 21.1 -116.5 3.0454 4.4 ------ UNKNOWN
251.8492 42.2852 3.3 32.8 -134.2 3.3419 3.5 ------ UNKNOWN
Plot creation:
Sat May 30 19:37:18 EDT 2015