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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
323.8064 -24.8101 0.0054 43.0950 15.5766 3.6867392 35.688 TRIG_00282808
Foreground time interval of the image:
-5.192 14.213 (delta_t = 19.405 [sec])
Background time interval of the image:
-239.888 -5.192 (delta_t = 234.696 [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 -5.192 sec. to 36.464 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52721 ( -0.0605786 0.0605777 )
Norm@50keV : 1.11885E-02 ( -0.000362769 0.000362769 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.10 using 59 PHA bins.
# Reduced chi-squared = 0.7210 for 57 degrees of freedom
# Null hypothesis probability = 9.443102e-01
Photon flux (15-150 keV) in 41.66 sec: 1.40723 ( -0.051429 0.0517115 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.4028e-06 ( -1.48263e-07 1.48479e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -5.192 sec. to 36.464 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52454 ( -0.205547 0.149659 )
Epeak [keV] : 9997.71 ( )
Norm@50keV : 1.12204E-02 ( -0.000363818 0.00311636 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.09 using 59 PHA bins.
# Reduced chi-squared = 0.7338 for 56 degrees of freedom
# Null hypothesis probability = 9.322691e-01
Photon flux (15-150 keV) in 41.66 sec: 1.40357 ( -0.054 0.05466 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.40859e-06 ( -1.4306e-07 1.43894e-07 ) ergs/cm2
Band function
Time interval is from -5.192 sec. to 36.464 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.95023 ( -3.17603 -3.17603 )
beta : -1.53892 ( -0.0662528 0.0627059 )
Epeak [keV] : 22.7952 ( -22.8668 68.9638 )
Norm@50keV : 52.7005 ( -52.7002 1774.41 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.52 using 59 PHA bins.
# Reduced chi-squared = 0.7366 for 55 degrees of freedom
# Null hypothesis probability = 9.278613e-01
Photon flux (15-150 keV) in 41.66 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] : 17.1737 ( )
R^2/D10^2 : 9.50973E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 290.37 using 59 PHA bins.
# Reduced chi-squared = 5.0941 for 57 degrees of freedom
# Null hypothesis probability = 5.399913e-33
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.373e-07 1.710e-08
25- 50 1.058e-06 4.749e-08
50-150 2.236e-06 1.304e-07
15-150 3.532e-06 1.433e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 5.75336 (-0.186849 0.186846)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.40 using 59 PHA bins.
# Reduced chi-squared = 0.8667 for 57 degrees of freedom
# Null hypothesis probability = 7.526518e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.969e-07 2.500e-08
25- 50 1.148e-06 4.395e-08
50-150 2.518e-06 9.061e-08
15-150 4.263e-06 1.608e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.33376 (-0.789872 0.859784)
R1^2/D10^2 : 1.28574 (-0.413333 0.665544)
kT2 [keV] : 29.8780 (-3.10778 4.18706)
R2^2/D10^2 : 1.13206E-02 (-0.00411277 0.0054429)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.68 using 59 PHA bins.
# Reduced chi-squared = 0.8124 for 55 degrees of freedom
# Null hypothesis probability = 8.385182e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.505e-07 6.228e-08
25- 50 1.132e-06 7.936e-08
50-150 2.710e-06 2.531e-07
15-150 4.392e-06 3.037e-07
Peak spectrum fit
Power-law model
Time interval is from 21.576 sec. to 22.576 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37605 ( -0.200676 0.198219 )
Norm@50keV : 2.05433E-02 ( -0.00229029 0.00229018 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.17 using 59 PHA bins.
# Reduced chi-squared = 1.073 for 57 degrees of freedom
# Null hypothesis probability = 3.287866e-01
Photon flux (15-150 keV) in 1 sec: 2.48852 ( -0.29525 0.296632 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.995e-07 ( -2.38572e-08 2.39944e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 21.576 sec. to 22.576 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.08306 ( )
Epeak [keV] : 31.7077 ( )
Norm@50keV : 7.20369E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.84 using 59 PHA bins.
# Reduced chi-squared = 1.069 for 56 degrees of freedom
# Null hypothesis probability = 3.381495e-01
Photon flux (15-150 keV) in 1 sec: 2.48865 ( -0.2956 0.29194 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.99248e-07 ( -2.3587e-08 2.4272e-08 ) ergs/cm2
Band function
Time interval is from 21.576 sec. to 22.576 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.34190 ( -4.34224 -4.34224 )
beta : -1.39722 ( -0.213872 0.210074 )
Epeak [keV] : 22.0787 ( -22.074 91.9852 )
Norm@50keV : 1241.77 ( -1244.24 1.644e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.97 using 59 PHA bins.
# Reduced chi-squared = 1.109 for 55 degrees of freedom
# Null hypothesis probability = 2.699191e-01
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] : 17.3542 (-3.02232 3.90789)
R^2/D10^2 : 0.169841 (-0.0840802 0.160224)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 90.59 using 59 PHA bins.
# Reduced chi-squared = 1.589 for 57 degrees of freedom
# Null hypothesis probability = 3.076050e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.036e-08 2.616e-09
25- 50 4.658e-08 8.455e-09
50-150 1.008e-07 2.183e-08
15-150 1.577e-07 2.360e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 10.3936 (-1.16911 1.16888)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.87 using 59 PHA bins.
# Reduced chi-squared = 1.138 for 57 degrees of freedom
# Null hypothesis probability = 2.214594e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.588e-08 1.047e-08
25- 50 4.979e-08 2.746e-08
50-150 1.092e-07 6.006e-08
15-150 1.849e-07 1.012e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.31854 (-1.8303 2.15317)
R1^2/D10^2 : 1.59876 (-0.866982 1.49121)
kT2 [keV] : 43.0707 (-13.8625 53.8464)
R2^2/D10^2 : 7.38820E-03 (-0.00626307 0.0169679)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.95 using 59 PHA bins.
# Reduced chi-squared = 1.054 for 55 degrees of freedom
# Null hypothesis probability = 3.671297e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.224e-08 9.716e-09
25- 50 5.014e-08 2.310e-08
50-150 1.333e-07 6.899e-08
15-150 2.056e-07 9.163e-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: 1.39329 ( -0.0733776 0.0731443 )
Norm@50keV : 1.33088E-02 ( -0.000546594 0.000546489 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.74 using 59 PHA bins.
# Reduced chi-squared = 0.8375 for 57 degrees of freedom
# Null hypothesis probability = 8.039803e-01
Photon flux (15-150 keV) in 19.4 sec: 1.61831 ( -0.0727026 0.0729249 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.49825e-06 ( -1.07439e-07 1.07576e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.18703 ( -0.299942 0.237305 )
Epeak [keV] : 221.841 ( )
Norm@50keV : 1.65164E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.20 using 59 PHA bins.
# Reduced chi-squared = 0.8249 for 56 degrees of freedom
# Null hypothesis probability = 8.219129e-01
Photon flux (15-150 keV) in 19.4 sec: 1.59945 ( -0.07676 0.07698 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.47573e-06 ( -1.13199e-07 1.12675e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.01298 ( 0.939642 0.939642 )
beta : -1.50912 ( 1.49735 0.149084 )
Epeak [keV] : 123.401 ( -111.349 -111.349 )
Norm@50keV : 2.07257E-02 ( -0.00748773 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.78 using 59 PHA bins.
# Reduced chi-squared = 0.8324 for 55 degrees of freedom
# Null hypothesis probability = 8.075011e-01
Photon flux (15-150 keV) in 19.4 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) = 1.10e-06
S(50-100 keV) = 1.53e-06
T90 vs. Hardness ratio plot
T90 = 33.2639999985695 sec.
Hardness ratio (energy fluence ratio) = 1.39091
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.40562
Count Ratio (50-100 keV) / (15-25 keV) = 1.14829
Mask shadow pattern
IMX = 9.012552681999916E-01, IMY = -2.512377228390137E-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:
-239.888000 -5.192000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9851 -15.6459 0.6 45.3 134.0 14.4210 17.8 0.5 Sco X-1
254.4921 35.3338 1.9 46.6 -151.2 2.2869 6.3 1.8 Her X-1
263.0979 -24.7261 23.1 34.8 108.6 0.2066 0.5 5.0 GX 1+4
268.3133 -1.4640 3.3 19.6 150.9 0.5966 3.5 3.4 SW J1753.5-0127
270.2895 -25.0606 3.1 30.8 99.1 1.2255 3.7 1.2 GX 5-1
270.4501 -25.7635 6.5 31.2 98.1 0.5956 1.8 8.1 GRS 1758-258
273.9867 -14.0392 3.0 20.0 109.5 0.7685 3.8 1.1 GX 17+2
275.7676 -30.3660 5.7 33.0 86.2 0.8117 2.0 8.1 H1820-303
284.9669 -24.7344 0.0 25.5 72.9 0.2556 1.1 11.8 HT1900.1-2455
288.8105 10.9379 1.2 10.4 -107.8 1.6579 9.4 0.8 GRS 1915+105
299.5962 35.1874 0.8 36.3 -96.8 7.0646 15.3 0.9 Cyg X-1
308.7556 -4.8922 2.5 21.6 -8.2 0.7505 4.6 ------ UNKNOWN
300.5345 40.0729 4.2 41.1 -98.3 2.6104 2.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-5.192000 14.212600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9879 -15.7162 6.5 45.3 133.9 0.3837 1.8 4.6 Sco X-1
254.4144 35.4595 4.0 46.7 -151.2 0.2731 2.9 7.3 Her X-1
262.9299 -24.6832 4.7 34.9 108.8 0.2705 2.4 5.7 GX 1+4
268.4859 -1.5564 5.8 19.5 150.5 0.1037 2.0 9.4 SW J1753.5-0127
270.2291 -24.8827 0.0 30.6 99.4 0.1354 1.5 12.2 GX 5-1
270.4251 -25.8102 3.8 31.3 98.1 -0.2799 -3.0 7.8 GRS 1758-258
273.8157 -14.1125 24.3 20.2 109.7 -0.0287 -0.5 12.0 GX 17+2
275.9272 -30.3697 41.2 33.0 86.0 0.0310 0.3 0.2 H1820-303
285.0280 -24.9086 51.1 25.6 72.8 0.0159 0.2 0.8 HT1900.1-2455
288.7271 10.8722 6.0 10.3 -108.2 0.0889 1.9 6.1 GRS 1915+105
299.8119 35.2807 0.0 36.4 -96.5 -0.0087 -0.1 11.9 Cyg X-1
323.8064 -24.8101 0.3 43.1 15.6 3.6870 35.7 ------ UNKNOWN
342.5633 -19.1773 2.7 57.2 0.3 1.3324 4.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
98.212590 962.124300
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
285.1602 -24.8125 4.5 34.9 91.9 2.4455 2.5 9.4 HT1900.1-2455
288.8732 10.9677 4.4 49.4 142.5 4.9082 2.6 4.6 GRS 1915+105
278.6713 -37.6331 4.3 40.2 70.6 4.6530 2.7 ------ UNKNOWN
310.1228 25.6130 2.0 52.2 174.6 7.0258 5.8 ------ UNKNOWN
355.0551 -42.0637 2.5 31.0 -38.3 2.3838 4.6 ------ UNKNOWN
327.4936 34.0831 3.6 59.1 -166.2 9.8530 3.2 ------ UNKNOWN
346.3600 -8.8099 3.1 26.9 -112.6 1.8509 3.7 ------ UNKNOWN
26.5825 -61.8752 3.4 55.5 -20.4 5.3830 3.4 ------ UNKNOWN
13.4612 -49.4526 4.0 45.5 -33.9 2.3371 2.9 ------ UNKNOWN
17.5297 -35.6829 5.0 47.1 -53.3 5.5260 2.3 ------ UNKNOWN
2.7793 -7.3969 4.3 41.1 -98.2 7.6237 2.7 473.9 UNKNOWN
Plot creation:
Sun May 31 09:52:48 EDT 2015