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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
227.2212 42.3998 0.0137 20.2239 -44.0843 0.6854120 13.988 TRIG_00599287
Foreground time interval of the image:
-3.980 15.845 (delta_t = 19.825 [sec])
Background time interval of the image:
-347.555 -328.358 (delta_t = 19.197 [sec])
-239.656 -3.980 (delta_t = 235.676 [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 1.024000
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 1.024000
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 1.024000
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 -3.980 sec. to 60.040 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.89241 ( -0.11978 0.123189 )
Norm@50keV : 1.98641E-03 ( -0.000154752 0.000152903 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.54 using 59 PHA bins.
# Reduced chi-squared = 1.080 for 57 degrees of freedom
# Null hypothesis probability = 3.168509e-01
Photon flux (15-150 keV) in 64.02 sec: 0.284157 ( -0.0183559 0.0183638 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.1691e-06 ( -8.94276e-08 9.07266e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -3.980 sec. to 60.040 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.976958 ( -0.610629 0.533886 )
Epeak [keV] : 47.9220 ( -7.11486 12.6666 )
Norm@50keV : 6.47742E-03 ( -0.00318066 0.00772819 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.19 using 59 PHA bins.
# Reduced chi-squared = 0.9320 for 56 degrees of freedom
# Null hypothesis probability = 6.196861e-01
Photon flux (15-150 keV) in 64.02 sec: 0.271743 ( -0.019491 0.019529 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.06423e-06 ( -9.94999e-08 1.04602e-07 ) ergs/cm2
Band function
Time interval is from -3.980 sec. to 60.040 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.976863 ( -0.432914 0.747717 )
beta : -10.0000 ( 10 5.32907e-15 )
Epeak [keV] : 47.9120 ( -7.11352 8.99698 )
Norm@50keV : 6.47789E-03 ( -0.00318407 0.00773459 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.19 using 59 PHA bins.
# Reduced chi-squared = 0.9490 for 55 degrees of freedom
# Null hypothesis probability = 5.824891e-01
Photon flux (15-150 keV) in 64.02 sec: 0.273016 ( 6.72698 -0.020919 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.06811e-06 ( -1.06766e-06 -1.04769e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.9455 (-0.801216 0.871019)
R^2/D10^2 : 9.41798E-02 (-0.0236303 0.0313241)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.20 using 59 PHA bins.
# Reduced chi-squared = 1.460 for 57 degrees of freedom
# Null hypothesis probability = 1.337571e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.508e-07 1.636e-08
25- 50 4.236e-07 3.156e-08
50-150 2.856e-07 4.878e-08
15-150 8.600e-07 6.626e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 78.6121 (-15.3856 22.0686)
Norm : 1.33940 (-0.129563 0.147629)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.20 using 59 PHA bins.
# Reduced chi-squared = 0.9333 for 57 degrees of freedom
# Null hypothesis probability = 6.185692e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.222e-07 2.074e-08
25- 50 3.643e-07 2.378e-08
50-150 5.082e-07 9.065e-08
15-150 1.095e-06 1.098e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.98807 (-1.37626 1.77849)
R1^2/D10^2 : 0.983234 (-0.633894 2.75526)
kT2 [keV] : 15.4948 (-2.37484 4.23837)
R2^2/D10^2 : 2.03322E-02 (-0.0133923 0.0212794)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.25 using 59 PHA bins.
# Reduced chi-squared = 0.9500 for 55 degrees of freedom
# Null hypothesis probability = 5.804147e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.167e-07 8.873e-08
25- 50 3.646e-07 8.819e-08
50-150 4.450e-07 1.512e-07
15-150 1.026e-06 2.590e-07
Peak spectrum fit
Power-law model
Time interval is from 41.944 sec. to 42.944 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.59072 ( -0.226079 0.233043 )
Norm@50keV : 7.54577E-03 ( -0.00117998 0.00116423 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.20 using 59 PHA bins.
# Reduced chi-squared = 0.9860 for 57 degrees of freedom
# Null hypothesis probability = 5.048981e-01
Photon flux (15-150 keV) in 1 sec: 0.966898 ( -0.136389 0.136403 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.06504e-08 ( -1.17732e-08 1.20952e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 41.944 sec. to 42.944 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.252740 ( -1.61397 1.1874 )
Epeak [keV] : 52.6869 ( -9.53154 22.8074 )
Norm@50keV : 8.20011E-02 ( -0.0819988 0.57938 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.12 using 59 PHA bins.
# Reduced chi-squared = 0.8593 for 56 degrees of freedom
# Null hypothesis probability = 7.639405e-01
Photon flux (15-150 keV) in 1 sec: 0.914259 ( -0.137972 0.138931 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.98439e-08 ( -1.13373e-08 1.29442e-08 ) ergs/cm2
Band function
Time interval is from 41.944 sec. to 42.944 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.208763 ( -1.13772 1.23446 )
beta : -9.37167 ( 9.37167 19.3716 )
Epeak [keV] : 53.1874 ( -9.40167 21.0486 )
Norm@50keV : 7.69571E-02 ( -0.0769763 90.7934 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.12 using 59 PHA bins.
# Reduced chi-squared = 0.8750 for 55 degrees of freedom
# Null hypothesis probability = 7.326620e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.9811e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.4113 (-1.70183 2.02497)
R^2/D10^2 : 0.225223 (-0.0952117 0.157978)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.98 using 59 PHA bins.
# Reduced chi-squared = 0.8768 for 57 degrees of freedom
# Null hypothesis probability = 7.335407e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.353e-09 1.831e-09
25- 50 2.406e-08 4.585e-09
50-150 2.278e-08 7.785e-09
15-150 5.419e-08 1.030e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 142.635 (-61.8353 -140.769)
Norm : 4.06652 (-0.610554 0.760762)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.94 using 59 PHA bins.
# Reduced chi-squared = 0.9288 for 57 degrees of freedom
# Null hypothesis probability = 6.280270e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.049e-08 5.870e-09
25- 50 1.929e-08 1.044e-08
50-150 3.728e-08 2.304e-08
15-150 6.706e-08 3.925e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.38620 (-7.38844 -7.38844)
R1^2/D10^2 : 0.607971 (-0.60759 -0.60759)
kT2 [keV] : 16.5582 (-16.5629 -16.5629)
R2^2/D10^2 : 5.73635E-02 (-0.0572811 0.238329)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.98 using 59 PHA bins.
# Reduced chi-squared = 0.8723 for 55 degrees of freedom
# Null hypothesis probability = 7.376986e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.840e-09 5.395e-09
25- 50 2.248e-08 1.205e-08
50-150 2.881e-08 1.674e-08
15-150 6.014e-08 3.255e-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: 1.92459 ( -0.211207 0.223659 )
Norm@50keV : 2.02697E-03 ( -0.000297033 0.000289458 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.68 using 59 PHA bins.
# Reduced chi-squared = 0.9417 for 57 degrees of freedom
# Null hypothesis probability = 6.004899e-01
Photon flux (15-150 keV) in 19.82 sec: 0.293975 ( -0.0329709 0.0329716 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.69478e-07 ( -5.16509e-08 5.31378e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.54498 ( -0.975572 0.63564 )
Epeak [keV] : 49.5418 ( )
Norm@50keV : 3.37397E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.06 using 59 PHA bins.
# Reduced chi-squared = 0.9475 for 56 degrees of freedom
# Null hypothesis probability = 5.868206e-01
Photon flux (15-150 keV) in 19.82 sec: 0.289455 ( -0.033241 0.034275 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.53212e-07 ( -5.96087e-08 6.27699e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.54529 ( 1.1811 1.1811 )
beta : -3.41632 ( 2.86753 12.8648 )
Epeak [keV] : 49.5383 ( -49.5369 -49.5369 )
Norm@50keV : 3.37201E-03 ( -0.00154178 0.00495014 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.06 using 59 PHA bins.
# Reduced chi-squared = 0.9647 for 55 degrees of freedom
# Null hypothesis probability = 5.490569e-01
Photon flux (15-150 keV) in 19.82 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) = 3.40e-07
S(50-100 keV) = 3.67e-07
T90 vs. Hardness ratio plot
T90 = 60.5239999294281 sec.
Hardness ratio (energy fluence ratio) = 1.07941
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.15891
Count Ratio (50-100 keV) / (15-25 keV) = 0.599557
Mask shadow pattern
IMX = 2.646293617018872E-01, IMY = 2.563029369990332E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000
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:
-347.555400 -328.357900
-239.656000 -3.980000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3948 35.2239 1020.3 35.7 -8.2 -0.0030 -0.0 7.7 Her X-1
231.1928 -10.9385 2.5 39.5 81.6 4.4701 4.6 ------ UNKNOWN
254.4651 3.2678 2.7 44.2 40.9 2.7306 4.2 ------ UNKNOWN
158.4590 2.6858 4.2 58.3 -175.3 3.5521 2.7 ------ UNKNOWN
169.3986 13.2584 2.8 44.0 -169.1 1.3999 4.2 ------ UNKNOWN
154.3536 9.4331 2.6 59.1 -166.2 6.0358 4.5 ------ UNKNOWN
236.9796 67.7238 3.6 44.8 -60.3 2.7937 3.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-3.980000 15.844600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.2741 35.3349 14.2 35.6 -8.4 -0.0494 -0.8 9.0 Her X-1
227.2211 42.3999 0.8 20.2 -44.1 0.6854 14.0 ------ UNKNOWN
273.4739 39.6407 2.0 50.9 -14.0 0.6817 5.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
57.244600 962.395800
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3852 35.2431 7.9 22.2 18.3 -0.7762 -1.5 6.9 Her X-1
299.5846 35.1971 0.7 55.1 -9.8 28.3686 17.6 0.4 Cyg X-1
308.1136 41.1622 31.3 57.8 -20.1 0.9926 0.4 12.6 Cyg X-3
277.9196 19.1774 3.0 48.4 21.0 5.9025 3.9 ------ UNKNOWN
230.7646 32.5387 2.8 10.2 81.7 2.0016 4.1 ------ UNKNOWN
241.7830 34.8364 3.0 13.6 37.5 1.7633 3.9 ------ UNKNOWN
215.1020 53.3666 2.0 13.6 -113.8 2.9333 5.7 ------ UNKNOWN
305.9701 69.7094 3.9 46.9 -53.8 8.0414 3.0 ------ UNKNOWN
Plot creation:
Sat May 30 13:29:12 EDT 2015