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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
304.6659 51.2218 0.0043 36.8545 -4.4807 6.3428218 44.583 TRIG_00603810
Foreground time interval of the image:
-46.080 15.693 (delta_t = 61.773 [sec])
Background time interval of the image:
-239.408 -46.080 (delta_t = 193.328 [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 -46.080 sec. to 85.592 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64498 ( -0.058949 0.0591576 )
Norm@50keV : 4.54023E-03 ( -0.000145562 0.000145452 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.11 using 59 PHA bins.
# Reduced chi-squared = 0.9318 for 57 degrees of freedom
# Null hypothesis probability = 6.216123e-01
Photon flux (15-150 keV) in 131.7 sec: 0.591865 ( -0.0205464 0.02061 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.56396e-06 ( -1.86321e-07 1.86697e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -46.080 sec. to 85.592 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28409 ( -0.25531 0.241253 )
Epeak [keV] : 103.830 ( -22.9728 97.2523 )
Norm@50keV : 6.76013E-03 ( -0.00154374 0.00214021 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.44 using 59 PHA bins.
# Reduced chi-squared = 0.8293 for 56 degrees of freedom
# Null hypothesis probability = 8.149764e-01
Photon flux (15-150 keV) in 131.7 sec: 0.577007 ( -0.011292 0.022663 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.4243e-06 ( -2.10259e-07 2.09192e-07 ) ergs/cm2
Band function
Time interval is from -46.080 sec. to 85.592 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.06372 ( -0.416458 0.757189 )
beta : -1.84768 ( 1.84768 0.15609 )
Epeak [keV] : 74.2152 ( -30.3536 87.392 )
Norm@50keV : 9.08357E-03 ( -0.00360961 0.0200459 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.52 using 59 PHA bins.
# Reduced chi-squared = 0.8276 for 55 degrees of freedom
# Null hypothesis probability = 8.152053e-01
Photon flux (15-150 keV) in 131.7 sec: 0.573524 ( 6.42648 -0.023227 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.41844e-06 ( -5.41752e-06 -2.06993e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.8653 ( )
R^2/D10^2 : 6.50977E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 232.80 using 59 PHA bins.
# Reduced chi-squared = 4.0842 for 57 degrees of freedom
# Null hypothesis probability = 4.155033e-23
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.972e-07 2.772e-08
25- 50 1.565e-06 6.717e-08
50-150 2.344e-06 1.534e-07
15-150 4.307e-06 1.501e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 164.587 (-24.5701 32.7388)
Norm : 2.39995 (-0.0929502 0.0996664)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.35 using 59 PHA bins.
# Reduced chi-squared = 0.8132 for 57 degrees of freedom
# Null hypothesis probability = 8.421728e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.048e-07 4.906e-08
25- 50 1.511e-06 9.943e-08
50-150 3.096e-06 8.113e-07
15-150 5.412e-06 8.409e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.51694 (-1.01897 1.06879)
R1^2/D10^2 : 0.481912 (-0.166001 0.306413)
kT2 [keV] : 25.7825 (-3.23687 4.77135)
R2^2/D10^2 : 6.80475E-03 (-0.00321125 0.00472654)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.90 using 59 PHA bins.
# Reduced chi-squared = 1.016 for 55 degrees of freedom
# Null hypothesis probability = 4.408209e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.185e-07 8.225e-08
25- 50 1.552e-06 1.218e-07
50-150 3.082e-06 3.279e-07
15-150 5.353e-06 4.162e-07
Peak spectrum fit
Power-law model
Time interval is from 15.476 sec. to 16.476 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.42653 ( -0.129823 0.129543 )
Norm@50keV : 2.52837E-02 ( -0.00204036 0.00203877 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.78 using 59 PHA bins.
# Reduced chi-squared = 1.119 for 57 degrees of freedom
# Null hypothesis probability = 2.502787e-01
Photon flux (15-150 keV) in 1 sec: 3.09814 ( -0.257596 0.25805 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.43021e-07 ( -2.10832e-08 2.11749e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 15.476 sec. to 16.476 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.433435 ( -0.699192 0.600478 )
Epeak [keV] : 80.5771 ( -15.0822 45.9554 )
Norm@50keV : 7.88589E-02 ( -0.0385475 0.0920968 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.15 using 59 PHA bins.
# Reduced chi-squared = 0.9848 for 56 degrees of freedom
# Null hypothesis probability = 5.070151e-01
Photon flux (15-150 keV) in 1 sec: 2.99497 ( -0.26659 0.26616 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.29863e-07 ( -2.2694e-08 2.2816e-08 ) ergs/cm2
Band function
Time interval is from 15.476 sec. to 16.476 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.241328 ( -0.725521 1.79254 )
beta : -2.14347 ( 2.15118 0.540718 )
Epeak [keV] : 72.2824 ( -31.0904 43.3084 )
Norm@50keV : 0.101878 ( -0.0576172 1.52672 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.53 using 59 PHA bins.
# Reduced chi-squared = 0.9914 for 55 degrees of freedom
# Null hypothesis probability = 4.926034e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.30862e-07 ( -2.30855e-07 -2.2492e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.8804 (-1.34805 1.51182)
R^2/D10^2 : 0.306199 (-0.0849476 0.113817)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.64 using 59 PHA bins.
# Reduced chi-squared = 1.239 for 57 degrees of freedom
# Null hypothesis probability = 1.057581e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.599e-08 2.490e-09
25- 50 6.686e-08 6.445e-09
50-150 1.175e-07 1.810e-08
15-150 2.004e-07 2.045e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 12.9273 (-1.03472 1.03467)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.95 using 59 PHA bins.
# Reduced chi-squared = 1.087 for 57 degrees of freedom
# Null hypothesis probability = 3.039311e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.219e-08 3.480e-09
25- 50 6.192e-08 8.250e-09
50-150 1.358e-07 5.016e-08
15-150 2.299e-07 5.305e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.26709 (-2.91339 5.76833)
R1^2/D10^2 : 2.03199 (-1.51774 9.40448)
kT2 [keV] : 21.6786 (-4.24113 72.9165)
R2^2/D10^2 : 8.23094E-02 (-0.0805063 0.120017)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.89 using 59 PHA bins.
# Reduced chi-squared = 1.016 for 55 degrees of freedom
# Null hypothesis probability = 4.411354e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.510e-08 1.172e-08
25- 50 6.410e-08 2.549e-08
50-150 1.376e-07 6.699e-08
15-150 2.267e-07 9.595e-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: 1.56933 ( -0.064445 0.064601 )
Norm@50keV : 6.70413E-03 ( -0.000236412 0.000236317 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.23 using 59 PHA bins.
# Reduced chi-squared = 0.9513 for 57 degrees of freedom
# Null hypothesis probability = 5.798201e-01
Photon flux (15-150 keV) in 61.77 sec: 0.853527 ( -0.0326469 0.0327452 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.88809e-06 ( -1.44456e-07 1.44717e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28704 ( -0.272877 0.256954 )
Epeak [keV] : 134.876 ( -41.4955 603.94 )
Norm@50keV : 9.11699E-03 ( -0.00217666 0.00306548 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.70 using 59 PHA bins.
# Reduced chi-squared = 0.9054 for 56 degrees of freedom
# Null hypothesis probability = 6.750061e-01
Photon flux (15-150 keV) in 61.77 sec: 0.837748 ( -0.035369 0.03553 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.81941e-06 ( -1.59157e-07 1.58422e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.03564 ( -0.522372 0.701928 )
beta : -1.72788 ( 1.73033 0.150816 )
Epeak [keV] : 82.2785 ( -42.4696 138.053 )
Norm@50keV : 1.27313E-02 ( -0.00497787 0.0268721 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.93 using 59 PHA bins.
# Reduced chi-squared = 0.9079 for 55 degrees of freedom
# Null hypothesis probability = 6.680559e-01
Photon flux (15-150 keV) in 61.77 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.81124e-06 ( -3.81081e-06 -1.56778e-07 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.47e-06
S(50-100 keV) = 1.88e-06
T90 vs. Hardness ratio plot
T90 = 105.191999912262 sec.
Hardness ratio (energy fluence ratio) = 1.27891
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.38176
Count Ratio (50-100 keV) / (15-25 keV) = 0.994472
Mask shadow pattern
IMX = 7.472891178422966E-01, IMY = 5.855921367516614E-02
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:
-239.408000 -46.080000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.6346 35.2533 6.4 4.6 109.0 0.3264 1.8 10.2 Her X-1
299.5869 35.1769 1.6 36.5 23.2 2.0369 7.3 1.5 Cyg X-1
307.9348 41.0734 0.0 40.8 10.9 0.3100 1.0 10.8 Cyg X-3
326.1666 38.2324 4.3 54.9 7.5 2.2414 2.7 5.4 Cyg X-2
274.4683 5.1405 2.6 39.4 86.9 3.2854 4.4 ------ UNKNOWN
223.4007 13.1431 2.6 37.5 174.3 1.1892 4.5 ------ UNKNOWN
210.4738 13.2635 2.8 46.0 -171.7 1.3912 4.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-46.080000 15.692600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.5025 35.2649 4.4 4.6 110.3 -0.2819 -2.6 5.1 Her X-1
299.5589 35.2655 7.5 36.4 23.1 -0.2660 -1.5 4.1 Cyg X-1
308.1923 40.9984 6.3 41.0 10.9 0.3215 1.8 4.6 Cyg X-3
326.1838 38.3909 8.9 54.8 7.3 -0.6292 -1.3 4.2 Cyg X-2
304.6659 51.2218 0.3 36.9 -4.5 6.3426 44.6 ------ UNKNOWN
205.1652 8.1894 2.6 53.3 -171.8 1.4280 4.4 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
72.092600 662.882000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4458 35.4653 5.5 38.8 160.5 -7.9274 -2.1 7.4 Her X-1
299.4933 35.2179 7.0 16.4 89.5 4.0031 1.6 4.9 Cyg X-1
308.1937 40.9203 3.2 10.6 59.7 7.0504 3.6 4.2 Cyg X-3
326.2733 38.1673 12.0 20.0 16.7 -2.0127 -1.0 10.4 Cyg X-2
278.4092 22.0450 2.4 35.6 119.2 22.2215 4.8 ------ UNKNOWN
354.6008 14.7434 4.0 54.0 8.2 19.5123 2.9 ------ UNKNOWN
220.3019 45.2515 2.4 53.3 -166.4 34.0914 4.9 ------ UNKNOWN
13.7800 26.5886 3.1 56.7 -17.7 31.5050 3.8 ------ UNKNOWN
Plot creation:
Sat May 30 13:01:33 EDT 2015