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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
299.8453 52.6179 0.0175 39.1413 157.1786 0.8059237 10.947 TRIG_00430957
Foreground time interval of the image:
-1.352 17.108 (delta_t = 18.460 [sec])
Background time interval of the image:
-239.320 -1.352 (delta_t = 237.968 [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 8.192000
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 8.192000
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 8.192000
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 -1.352 sec. to 17.108 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.75566 ( -0.227195 0.238053 )
Norm@50keV : 2.97551E-03 ( -0.000432597 0.000423918 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.39 using 59 PHA bins.
# Reduced chi-squared = 1.147 for 57 degrees of freedom
# Null hypothesis probability = 2.083670e-01
Photon flux (15-150 keV) in 18.46 sec: 0.403181 ( -0.0530318 0.0531035 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.06679e-07 ( -7.51564e-08 7.6305e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.352 sec. to 17.108 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.17178 ( -1.07525 0.931142 )
Epeak [keV] : 68.2514 ( -39.0763 -68.2514 )
Norm@50keV : 6.00305E-03 ( -0.00600307 0.0151835 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.17 using 59 PHA bins.
# Reduced chi-squared = 1.146 for 56 degrees of freedom
# Null hypothesis probability = 2.120036e-01
Photon flux (15-150 keV) in 18.46 sec: 0.393337 ( -0.055388 0.055121 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.87224e-07 ( -7.9786e-08 8.19052e-08 ) ergs/cm2
Band function
Time interval is from -1.352 sec. to 17.108 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.17177 ( -0.546673 1.31313 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 68.2305 ( -22.7428 -68.2305 )
Norm@50keV : 6.00289E-03 ( -0.00329438 0.015185 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.17 using 59 PHA bins.
# Reduced chi-squared = 1.167 for 55 degrees of freedom
# Null hypothesis probability = 1.860418e-01
Photon flux (15-150 keV) in 18.46 sec: 0.393402 ( 6.6066 -0.05546 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.85149e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.3965 (-2.02506 2.33718)
R^2/D10^2 : 6.56192E-02 (-0.0290745 0.0534682)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.21 using 59 PHA bins.
# Reduced chi-squared = 1.337 for 57 degrees of freedom
# Null hypothesis probability = 4.550446e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.607e-08 1.260e-08
25- 50 1.638e-07 3.159e-08
50-150 1.891e-07 5.179e-08
15-150 3.989e-07 6.950e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 120.983 (-46.8418 -117.98)
Norm : 1.69729 (-0.247042 0.357295)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.30 using 59 PHA bins.
# Reduced chi-squared = 1.128 for 57 degrees of freedom
# Null hypothesis probability = 2.363031e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.158e-08 1.499e-08
25- 50 1.462e-07 3.216e-08
50-150 2.619e-07 1.634e-07
15-150 4.896e-07 1.922e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.47527 (-2.43323 2.78444)
R1^2/D10^2 : 2.23205 (-1.88947 184.402)
kT2 [keV] : 17.8568 (-3.84516 6.52569)
R2^2/D10^2 : 1.97671E-02 (-0.0141834 0.0322275)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.92 using 59 PHA bins.
# Reduced chi-squared = 1.144 for 55 degrees of freedom
# Null hypothesis probability = 2.164230e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.629e-08 4.572e-08
25- 50 1.383e-07 6.013e-08
50-150 2.487e-07 1.204e-07
15-150 4.733e-07 1.960e-07
Peak spectrum fit
Power-law model
Time interval is from 1.972 sec. to 2.972 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64664 ( -0.536728 0.578973 )
Norm@50keV : 5.38221E-03 ( -0.00185399 0.00178454 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.94 using 59 PHA bins.
# Reduced chi-squared = 0.9990 for 57 degrees of freedom
# Null hypothesis probability = 4.772673e-01
Photon flux (15-150 keV) in 1 sec: 0.702009 ( -0.222465 0.223094 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.00736e-08 ( -1.75521e-08 1.81638e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.972 sec. to 2.972 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.638310 ( -7.45591 1.58505 )
Epeak [keV] : 61.9807 ( -61.7724 -61.7724 )
Norm@50keV : 1.88218E-02 ( -0.0191322 164.474 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.54 using 59 PHA bins.
# Reduced chi-squared = 1.010 for 56 degrees of freedom
# Null hypothesis probability = 4.545530e-01
Photon flux (15-150 keV) in 1 sec: 0.675401 ( -0.260206 0.23496 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.59299e-08 ( -1.97968e-08 2.09423e-08 ) ergs/cm2
Band function
Time interval is from 1.972 sec. to 2.972 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -3.34246E-02 ( 0.984441 0.984441 )
beta : -2.48697 ( 2.035 2.27323 )
Epeak [keV] : 53.1387 ( -52.9339 217.602 )
Norm@50keV : 4.11134E-02 ( -0.0460119 990704 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.24 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 55 degrees of freedom
# Null hypothesis probability = 4.280916e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.62148e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.4490 (-3.37345 5.31776)
R^2/D10^2 : 0.156695 (-0.156694 0.340815)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.04 using 59 PHA bins.
# Reduced chi-squared = 1.001 for 57 degrees of freedom
# Null hypothesis probability = 4.735597e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.148e-09 3.262e-09
25- 50 1.690e-08 1.059e-08
50-150 1.613e-08 1.147e-08
15-150 3.818e-08 2.481e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 158.142 ( )
Norm : 2.89365 (-0.932232 1.59653)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.69 using 59 PHA bins.
# Reduced chi-squared = 0.9945 for 57 degrees of freedom
# Null hypothesis probability = 4.866990e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.200e-09 4.515e-09
25- 50 1.369e-08 8.225e-09
50-150 2.907e-08 1.777e-08
15-150 4.996e-08 3.012e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.41727 (-1.40976 14.5593)
R1^2/D10^2 : 6118.08 (-6749.77 -6749.77)
kT2 [keV] : 13.2151 (-3.73205 -13.2073)
R2^2/D10^2 : 0.121486 (-0.122013 0.157963)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.89 using 59 PHA bins.
# Reduced chi-squared = 1.016 for 55 degrees of freedom
# Null hypothesis probability = 4.411727e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.151e-09 2.959e-09
25- 50 1.577e-08 9.595e-09
50-150 1.757e-08 1.263e-08
15-150 3.950e-08 2.445e-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: 1.75566 ( -0.227195 0.238053 )
Norm@50keV : 2.97551E-03 ( -0.000432597 0.000423918 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.39 using 59 PHA bins.
# Reduced chi-squared = 1.147 for 57 degrees of freedom
# Null hypothesis probability = 2.083670e-01
Photon flux (15-150 keV) in 18.46 sec: 0.403181 ( -0.0530318 0.0531035 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.06679e-07 ( -7.51564e-08 7.6305e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.17178 ( -1.07525 0.931142 )
Epeak [keV] : 68.2514 ( -39.0763 -68.2514 )
Norm@50keV : 6.00305E-03 ( -0.00600307 0.0151835 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.17 using 59 PHA bins.
# Reduced chi-squared = 1.146 for 56 degrees of freedom
# Null hypothesis probability = 2.120036e-01
Photon flux (15-150 keV) in 18.46 sec: 0.393337 ( -0.055388 0.055121 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.87224e-07 ( -7.9786e-08 8.19052e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.17177 ( -0.546673 1.31313 )
beta : -10.0000 ( 10 0 )
Epeak [keV] : 68.2305 ( -22.7428 -68.2305 )
Norm@50keV : 6.00289E-03 ( -0.00329438 0.015185 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.17 using 59 PHA bins.
# Reduced chi-squared = 1.167 for 55 degrees of freedom
# Null hypothesis probability = 1.860418e-01
Photon flux (15-150 keV) in 18.46 sec: 0.393402 ( 6.6066 -0.05546 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.85149e-07 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.40e-07
S(50-100 keV) = 1.66e-07
T90 vs. Hardness ratio plot
T90 = 16.7359999418259 sec.
Hardness ratio (energy fluence ratio) = 1.18571
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.22204
Count Ratio (50-100 keV) / (15-25 keV) = 0.914082
Mask shadow pattern
IMX = -7.501646146142072E-01, IMY = -3.156705144955707E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
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:
-239.320000 -1.352000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.5836 35.1243 3.2 47.4 134.6 2.8771 3.6 4.6 Cyg X-1
308.1067 40.9422 2.0 38.7 136.5 2.3339 5.8 0.6 Cyg X-3
326.1852 38.3466 5.0 27.8 119.7 0.5701 2.3 1.6 Cyg X-2
309.9982 39.1626 2.1 38.3 132.9 2.2709 5.6 ------ UNKNOWN
35.8944 4.7886 2.9 51.6 -8.6 1.6163 4.0 ------ UNKNOWN
241.7174 75.4717 2.4 51.0 -160.3 2.0232 4.9 ------ UNKNOWN
59.7947 29.7415 4.5 47.0 -53.1 2.2284 2.6 ------ UNKNOWN
72.9681 59.8265 3.2 41.2 -98.1 3.3280 3.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-1.352000 17.108000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.4336 35.2095 3.9 47.5 134.8 -0.6162 -2.9 7.7 Cyg X-1
308.2649 40.8064 9.1 38.6 136.2 -0.1172 -1.3 11.2 Cyg X-3
326.0069 38.3022 8.8 28.0 119.8 -0.0780 -1.3 7.8 Cyg X-2
299.8453 52.6178 1.0 39.1 157.2 0.8059 10.9 ------ UNKNOWN
44.3607 1.0611 2.6 59.0 -15.2 1.0119 4.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
110.380600 918.180620
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.5679 35.4634 8.8 36.0 -174.4 -0.6460 -1.3 9.0 Her X-1
299.6006 35.2018 0.5 17.4 106.4 9.3784 21.4 0.5 Cyg X-1
308.0989 40.9552 0.6 12.9 76.8 7.3066 18.8 0.5 Cyg X-3
326.2452 38.1803 9.6 23.3 43.5 0.5354 1.2 9.2 Cyg X-2
260.7195 50.7251 3.0 24.1 -153.1 1.6860 3.8 ------ UNKNOWN
27.1016 48.5249 2.2 52.1 -17.3 5.4324 5.2 ------ UNKNOWN
55.8109 72.9186 4.0 47.0 -53.2 7.4189 2.9 ------ UNKNOWN
Plot creation:
Sun May 31 00:15:42 EDT 2015