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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
56.3380 -66.5779 0.0176 2.6316 -73.5043 0.7161204 10.934 TRIG_00607742
Foreground time interval of the image:
-14.808 29.736 (delta_t = 44.544 [sec])
Background time interval of the image:
-408.347 -392.077 (delta_t = 16.270 [sec])
-239.648 -14.808 (delta_t = 224.840 [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 2.048000
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 2.048000
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 2.048000
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 -14.808 sec. to 29.736 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.38503 ( -0.284369 0.320494 )
Norm@50keV : 6.94875E-04 ( -0.000160536 0.000158827 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.25 using 59 PHA bins.
# Reduced chi-squared = 1.215 for 57 degrees of freedom
# Null hypothesis probability = 1.280882e-01
Photon flux (15-150 keV) in 44.54 sec: 0.127451 ( -0.0171553 0.0171649 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.00894e-07 ( -5.28436e-08 5.58042e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -14.808 sec. to 29.736 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.67826 ( -1.61568 0.324812 )
Epeak [keV] : 16.2237 ( )
Norm@50keV : 1.95564E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.25 using 59 PHA bins.
# Reduced chi-squared = 1.219 for 56 degrees of freedom
# Null hypothesis probability = 1.262717e-01
Photon flux (15-150 keV) in 44.54 sec: 0.124724 ( -0.017453 0.017648 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.78332e-07 ( -5.52768e-08 6.65931e-08 ) ergs/cm2
Band function
Time interval is from -14.808 sec. to 29.736 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.67836 ( -2.57623 0.965565 )
beta : -10.0000 ( 10 2.13163e-14 )
Epeak [keV] : 16.2207 ( -11.676 17.2696 )
Norm@50keV : 1.95473E-03 ( -0.00100935 0.0204807 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.25 using 59 PHA bins.
# Reduced chi-squared = 1.241 for 55 degrees of freedom
# Null hypothesis probability = 1.081750e-01
Photon flux (15-150 keV) in 44.54 sec: 0.125023 ( 6.87498 -0.017661 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.80255e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.47179 (-1.14829 1.31713)
R^2/D10^2 : 0.182288 (-0.0874848 0.17768)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.70 using 59 PHA bins.
# Reduced chi-squared = 1.346 for 57 degrees of freedom
# Null hypothesis probability = 4.200651e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.753e-08 1.900e-08
25- 50 1.201e-07 2.675e-08
50-150 2.506e-08 1.200e-08
15-150 2.227e-07 4.574e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 35.5383 (-10.578 17.1577)
Norm : 0.894462 (-0.219519 0.318208)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.42 using 59 PHA bins.
# Reduced chi-squared = 1.200 for 57 degrees of freedom
# Null hypothesis probability = 1.429340e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.758e-08 1.581e-08
25- 50 1.092e-07 2.218e-08
50-150 7.384e-08 3.295e-08
15-150 2.706e-07 5.944e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.02356 (-2.90478 2.17781)
R1^2/D10^2 : 1.52833 (-1.21821 738.767)
kT2 [keV] : 11.9391 (-3.85203 10.5226)
R2^2/D10^2 : 1.95205E-02 (-0.0183602 0.0844837)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.24 using 59 PHA bins.
# Reduced chi-squared = 1.241 for 55 degrees of freedom
# Null hypothesis probability = 1.083317e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.990e-08 4.761e-08
25- 50 1.054e-07 5.643e-08
50-150 7.031e-08 4.325e-08
15-150 2.655e-07 1.352e-07
Peak spectrum fit
Power-law model
Time interval is from 0.980 sec. to 1.980 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.54705 ( -0.337849 0.347265 )
Norm@50keV : 4.34529E-03 ( -0.000992843 0.000977363 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.93 using 59 PHA bins.
# Reduced chi-squared = 0.9461 for 57 degrees of freedom
# Null hypothesis probability = 5.909909e-01
Photon flux (15-150 keV) in 1 sec: 0.549624 ( -0.11676 0.116824 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.09213e-08 ( -9.93418e-09 1.02715e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.980 sec. to 1.980 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.168058 ( -2.01975 1.41498 )
Epeak [keV] : 58.3451 ( -17.1685 2195.89 )
Norm@50keV : 2.56131E-02 ( -0.0256068 0.336185 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.18 using 59 PHA bins.
# Reduced chi-squared = 0.9139 for 56 degrees of freedom
# Null hypothesis probability = 6.576753e-01
Photon flux (15-150 keV) in 1 sec: 0.527630 ( -0.059996 0.118327 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.593e-08 ( -9.9893e-09 1.12833e-08 ) ergs/cm2
Band function
Time interval is from 0.980 sec. to 1.980 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -6.08793 -5 )
beta : -1.95930 ( -0.788987 0.486065 )
Epeak [keV] : 29.3562 ( -8.0819 7.57581 )
Norm@50keV : 205.124 ( -41.9706 1237.06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.50 using 59 PHA bins.
# Reduced chi-squared = 0.9000 for 55 degrees of freedom
# Null hypothesis probability = 6.840342e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.60382e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.7988 (-2.9085 3.81367)
R^2/D10^2 : 0.113008 (-0.0685642 0.171221)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.34 using 59 PHA bins.
# Reduced chi-squared = 0.9359 for 57 degrees of freedom
# Null hypothesis probability = 6.130242e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.926e-09 1.679e-09
25- 50 1.330e-08 4.144e-09
50-150 1.364e-08 6.877e-09
15-150 3.086e-08 1.213e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 166.175 (-95.8589 -164.999)
Norm : 2.28818 (-0.493772 0.644986)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.69 using 59 PHA bins.
# Reduced chi-squared = 0.9244 for 57 degrees of freedom
# Null hypothesis probability = 6.372588e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.821e-09 3.366e-09
25- 50 1.094e-08 6.010e-09
50-150 2.250e-08 1.347e-08
15-150 3.927e-08 2.278e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.14913 (-3.08565 6.12045)
R1^2/D10^2 : 0.499801 (-0.236064 4.04353)
kT2 [keV] : 20.1381 (-16.8006 -20.1151)
R2^2/D10^2 : 1.57540E-02 (-0.0154052 0.106196)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.32 using 59 PHA bins.
# Reduced chi-squared = 0.9148 for 55 degrees of freedom
# Null hypothesis probability = 6.539311e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.421e-09 3.220e-09
25- 50 1.212e-08 6.710e-09
50-150 1.956e-08 1.203e-08
15-150 3.711e-08 1.905e-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: 2.38503 ( -0.284369 0.320494 )
Norm@50keV : 6.94875E-04 ( -0.000160536 0.000158827 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.25 using 59 PHA bins.
# Reduced chi-squared = 1.215 for 57 degrees of freedom
# Null hypothesis probability = 1.280882e-01
Photon flux (15-150 keV) in 44.54 sec: 0.127451 ( -0.0171553 0.0171649 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.00894e-07 ( -5.28436e-08 5.58042e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.67826 ( -1.61568 0.324812 )
Epeak [keV] : 16.2237 ( )
Norm@50keV : 1.95564E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.25 using 59 PHA bins.
# Reduced chi-squared = 1.219 for 56 degrees of freedom
# Null hypothesis probability = 1.262717e-01
Photon flux (15-150 keV) in 44.54 sec: 0.124724 ( -0.017453 0.017648 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.78332e-07 ( -5.52768e-08 6.65931e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.67836 ( -2.57623 0.965565 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 16.2207 ( -11.6759 17.2696 )
Norm@50keV : 1.95473E-03 ( -0.00100935 0.0204807 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.25 using 59 PHA bins.
# Reduced chi-squared = 1.241 for 55 degrees of freedom
# Null hypothesis probability = 1.081750e-01
Photon flux (15-150 keV) in 44.54 sec: 0.125023 ( 6.87498 -0.017661 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.80255e-07 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 9.85e-08
S(50-100 keV) = 7.54e-08
T90 vs. Hardness ratio plot
T90 = 40.8959999680519 sec.
Hardness ratio (energy fluence ratio) = 0.765482
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.816296
Count Ratio (50-100 keV) / (15-25 keV) = 0.286563
Mask shadow pattern
IMX = 1.305061566609116E-02, IMY = 4.407026265860486E-02
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000
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:
-408.347400 -392.077100
-239.648000 -14.808000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.3042 -60.6656 19.4 45.5 -22.1 0.1846 0.6 2.6 Cen X-3
186.6749 -62.7941 4.0 46.9 -11.1 0.9127 2.9 1.5 GX 301-2
257.2833 -60.7289 2.8 51.1 31.1 4.5034 4.0 ------ UNKNOWN
216.4583 -68.5371 2.5 44.5 7.3 1.4394 4.6 ------ UNKNOWN
182.4889 -67.7225 2.1 41.7 -10.6 1.3562 5.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-14.808000 29.736000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.4239 -60.6363 12.8 45.5 -22.0 0.1144 0.9 3.3 Cen X-3
186.7062 -62.7524 4.8 46.9 -11.1 -0.3161 -2.4 1.7 GX 301-2
273.5473 -60.7901 2.4 48.6 41.0 1.5596 4.9 ------ UNKNOWN
321.0833 -63.9083 2.3 34.1 65.9 0.6488 5.1 ------ UNKNOWN
56.3381 -66.5778 1.1 2.6 -73.5 0.7163 10.9 ------ UNKNOWN
59.8099 -44.4580 2.4 22.8 -147.0 0.3224 4.8 ------ UNKNOWN
129.4628 -61.6580 2.9 32.7 -45.6 0.3787 4.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
47.452600 902.447700
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.2343 -60.6682 13.0 43.9 -17.9 0.8372 0.9 3.6 Cen X-3
186.7152 -62.8839 7.1 45.6 -6.7 1.7862 1.6 7.0 GX 301-2
13.7883 -29.7873 2.2 44.8 145.9 8.6151 5.2 ------ UNKNOWN
30.5168 -15.0931 2.6 54.2 171.1 12.1417 4.4 ------ UNKNOWN
210.2670 -55.0679 2.8 56.8 4.9 12.7371 4.1 ------ UNKNOWN
208.0184 -67.4602 2.3 44.5 7.4 5.1451 5.0 ------ UNKNOWN
37.1260 -50.2551 3.0 19.0 162.0 2.2130 3.8 ------ UNKNOWN
40.3376 -32.7396 2.2 35.1 178.5 3.8961 5.2 ------ UNKNOWN
186.7112 -58.2854 2.5 49.8 -9.2 5.6694 4.5 ------ UNKNOWN
68.1928 -41.2319 2.2 26.1 -137.2 3.2761 5.2 ------ UNKNOWN
49.0598 -7.7292 3.0 59.0 -166.1 15.2636 3.9 ------ UNKNOWN
Plot creation:
Sat May 30 12:50:48 EDT 2015