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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
293.7130 +21.8885 0.0233 37.3 -87.4 0.1243 8.3 TRIG_00632158
------------------------------------------
Foreground time interval of the image:
0.004 0.092 (delta_t = 0.088 [sec])
Background time interval of the image:
-239.520 0.004 (delta_t = 239.524 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) 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.
- 5) 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.
- 6) 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 0.064000
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 0.064000
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 0.064000
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Flight mask-tagged light curves
Caution: Mask-weight map is always using the same on-axis map
Quad-rate summed light curves (from T0-300 to T0+1000)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of 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.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.004 sec. to 0.092 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.39897 ( -0.403522 0.510366 )
Norm@50keV : 2.67088E-02 ( -0.0111681 0.0117563 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.92 using 59 PHA bins.
# Reduced chi-squared = 0.9811 for 57 degrees of freedom
# Null hypothesis probability = 5.155000e-01
Photon flux (15-150 keV) in 0.088 sec: 9.95330 ( -2.17997 2.1833 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.47047e-08 ( -8.5188e-09 8.71961e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.004 sec. to 0.092 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.204660 ( -5.96862 1.66007 )
Epeak [keV] : 18.2706 ( -15.238 7.50012 )
Norm@50keV : 3.99785 ( -4.50834 175974 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.46 using 59 PHA bins.
# Reduced chi-squared = 0.8476 for 56 degrees of freedom
# Null hypothesis probability = 7.845765e-01
Photon flux (15-150 keV) in 0.088 sec: 10.8826 ( -2.21205 2.2196 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.75434e-08 ( -8.56979e-09 8.62532e-09 ) ergs/cm2
Band function
Time interval is from 0.004 sec. to 0.092 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.238398 ( -5.61455 -3.91301 )
beta : -9.37167 ( 4.83786 1.26769 )
Epeak [keV] : 20.1571 ( -4.01628 5.59302 )
Norm@50keV : 7.69715 ( -7.69362 5134.96 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.47 using 59 PHA bins.
# Reduced chi-squared = 0.8630 for 55 degrees of freedom
# Null hypothesis probability = 7.547737e-01
Photon flux (15-150 keV) in 0.088 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.77952e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.53069 (-1.06637 1.27064)
R^2/D10^2 : 60.7850 (-36.9472 101.958)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.04 using 59 PHA bins.
# Reduced chi-squared = 0.8428 for 57 degrees of freedom
# Null hypothesis probability = 7.951080e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.915e-08 9.388e-09
25- 50 1.591e-08 7.318e-09
50-150 1.031e-09 7.751e-10
15-150 3.610e-08 1.490e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.7664 (-4.8345 5.85785)
Norm : 168.184 (-60.3863 102.812)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.53 using 59 PHA bins.
# Reduced chi-squared = 0.8515 for 57 degrees of freedom
# Null hypothesis probability = 7.801690e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.945e-08 5.918e-09
25- 50 1.471e-08 5.353e-09
50-150 3.220e-09 2.253e-09
15-150 3.738e-08 1.269e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.19216 (-4.18957 -4.18957)
R1^2/D10^2 : 131.134 (-131.485 -131.485)
kT2 [keV] : 7.78556 (-7.78072 -7.78072)
R2^2/D10^2 : 6.66007 (-6.69589 127.935)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.13 using 59 PHA bins.
# Reduced chi-squared = 0.8570 for 55 degrees of freedom
# Null hypothesis probability = 7.656436e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.940e-08 1.473e-08
25- 50 1.590e-08 1.208e-08
50-150 2.605e-09 2.362e-09
15-150 3.791e-08 2.447e-08
Peak spectrum fit
Power-law model
Time interval is from -0.450 sec. to 0.550 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.84079 ( -0.669663 1.36073 )
Norm@50keV : 4.82056E-03 ( -0.00482056 0.00312814 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.81 using 59 PHA bins.
# Reduced chi-squared = 1.049 for 57 degrees of freedom
# Null hypothesis probability = 3.738745e-01
Photon flux (15-150 keV) in 1 sec: 1.18376 ( -0.397 0.396234 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.40731e-08 ( -2.36698e-08 2.36708e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.450 sec. to 0.550 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.97673 ( -0.629351 0.0222806 )
Epeak [keV] : 1.31904 ( -1.06339 40.1984 )
Norm@50keV : 1.42940E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.29 using 59 PHA bins.
# Reduced chi-squared = 1.077 for 56 degrees of freedom
# Null hypothesis probability = 3.234454e-01
Photon flux (15-150 keV) in 1 sec: 1.18108 ( -0.394149 0.39649 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.35806e-08 ( -2.30946e-08 2.4202e-08 ) ergs/cm2
Band function
Time interval is from -0.450 sec. to 0.550 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.94804 ( 7.94804 7.94804 )
beta : -2.84077 ( -1.35818 0.669883 )
Epeak [keV] : 16.3203 ( -16.3203 -16.3203 )
Norm@50keV : 0.655188 ( -0.65519 0.42515 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.81 using 59 PHA bins.
# Reduced chi-squared = 1.088 for 55 degrees of freedom
# Null hypothesis probability = 3.052184e-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] : 3.48365 (-1.43074 10.2199)
R^2/D10^2 : 53.0976 (-54.8388 1552.49)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.06 using 59 PHA bins.
# Reduced chi-squared = 1.141 for 57 degrees of freedom
# Null hypothesis probability = 2.166233e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.372e-08 1.378e-08
25- 50 5.665e-09 3.698e-09
50-150 2.810e-11 3.258e-11
15-150 2.941e-08 1.832e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 31.4640 (-22.3381 40.6576)
Norm : 9.16377 (-4.61499 32.3975)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.98 using 59 PHA bins.
# Reduced chi-squared = 1.070 for 57 degrees of freedom
# Null hypothesis probability = 3.349360e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.909e-08 1.014e-08
25- 50 2.239e-08 1.412e-08
50-150 1.304e-08 1.110e-08
15-150 5.453e-08 3.477e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.28969 (-1.28246 1.66359)
R1^2/D10^2 : 532.371 (-509.361 1.23257e+06)
kT2 [keV] : 12.8202 (-4.75943 7.0818)
R2^2/D10^2 : 0.152028 (-0.134825 0.649857)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.76 using 59 PHA bins.
# Reduced chi-squared = 1.032 for 55 degrees of freedom
# Null hypothesis probability = 4.092453e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.035e-08 1.065e-08
25- 50 1.874e-08 1.178e-08
50-150 1.853e-08 1.473e-08
15-150 5.762e-08 3.245e-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: 3.39897 ( -0.403522 0.510366 )
Norm@50keV : 2.67088E-02 ( -0.0111681 0.0117563 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.92 using 59 PHA bins.
# Reduced chi-squared = 0.9811 for 57 degrees of freedom
# Null hypothesis probability = 5.155000e-01
Photon flux (15-150 keV) in 0.088 sec: 9.95330 ( -2.17997 2.1833 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.47047e-08 ( -8.5188e-09 8.71961e-09 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.204660 ( -5.96862 1.7409 )
Epeak [keV] : 18.2706 ( -15.238 7.50012 )
Norm@50keV : 3.99785 ( -4.50834 175974 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.46 using 59 PHA bins.
# Reduced chi-squared = 0.8476 for 56 degrees of freedom
# Null hypothesis probability = 7.845765e-01
Photon flux (15-150 keV) in 0.088 sec: 10.8826 ( -2.21205 2.2196 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.75434e-08 ( -8.56979e-09 8.62532e-09 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.238398 ( -5.61455 -3.91301 )
beta : -9.37167 ( 4.83786 1.26769 )
Epeak [keV] : 20.1571 ( -4.01628 5.59302 )
Norm@50keV : 7.69715 ( -7.69362 4822.43 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.47 using 59 PHA bins.
# Reduced chi-squared = 0.8630 for 55 degrees of freedom
# Null hypothesis probability = 7.547737e-01
Photon flux (15-150 keV) in 0.088 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.77952e-08 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.10e-08
S(50-100 keV) = 4.12e-09
T90 vs. Hardness ratio plot
T90 = 0.0759999752044678 sec.
Hardness ratio (energy fluence ratio) = 0.374545
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.535364
Count Ratio (50-100 keV) / (15-25 keV) = 0.198148
Mask shadow pattern
IMX = 3.416292627294123E-02, IMY = 7.615482245917869E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
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:
-239.520000 0.004000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9806 -15.6446 1.1 50.5 4.6 5.2888 11.0 0.3 Sco X-1
254.5311 35.3908 7.0 1.5 -149.6 0.3086 1.7 4.6 Her X-1
268.3311 -1.5714 8.4 38.4 -30.3 -0.3430 -1.4 7.5 SW J1753.5-0127
273.9217 -14.0796 8.7 52.1 -31.4 0.7706 1.3 5.5 GX 17+2
288.7434 10.8898 2.6 39.7 -68.5 2.2938 4.5 4.7 GRS 1915+105
299.5675 35.1835 3.3 37.6 -111.0 1.4833 3.5 1.6 Cyg X-1
308.0327 41.1176 5.2 43.0 -121.9 -1.2809 -2.2 10.5 Cyg X-3
221.3184 3.5007 2.5 42.8 45.4 2.5986 4.5 ------ UNKNOWN
309.4781 87.1509 3.2 54.2 177.0 2.6581 3.6 ------ UNKNOWN
261.2221 3.0669 2.1 32.0 -20.7 1.0806 5.5 ------ UNKNOWN
266.3736 19.6888 2.7 18.5 -47.5 0.7875 4.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.004000 0.092000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0165 -15.7049 4.1 50.6 4.6 -0.0233 -2.8 4.4 Sco X-1
254.2789 35.2081 8.6 1.2 -152.3 -0.0045 -1.3 11.9 Her X-1
268.1968 -1.5815 0.0 38.4 -30.1 0.0039 0.7 12.9 SW J1753.5-0127
273.9130 -14.0152 5.8 52.0 -31.4 0.0301 2.0 5.5 GX 17+2
288.7454 10.9542 8.6 39.7 -68.6 -0.0189 -1.3 3.2 GRS 1915+105
299.6060 35.1917 145.6 37.6 -111.0 0.0009 0.1 1.0 Cyg X-1
308.1916 41.0689 7.5 43.2 -121.8 -0.0255 -1.5 7.9 Cyg X-3
222.8550 -6.9882 2.0 50.4 35.1 0.0879 5.6 ------ UNKNOWN
241.5053 46.3956 3.1 15.2 141.0 0.0119 3.7 ------ UNKNOWN
298.7384 76.1553 2.2 46.8 -172.5 0.0350 5.3 ------ UNKNOWN
293.7130 21.8885 1.4 37.3 -87.4 0.1243 8.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
66.180590 722.560000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.6202 35.2526 8.6 36.5 86.6 -2.4934 -1.4 9.6 Her X-1
262.9780 -24.8027 7.8 55.4 0.7 3.6667 1.5 3.8 GX 1+4
268.3873 -1.4058 63.7 34.0 16.4 0.1538 0.2 3.0 SW J1753.5-0127
270.2139 -25.0851 8.1 52.2 -6.4 2.1995 1.4 3.8 GX 5-1
270.2641 -25.6394 8.5 52.7 -6.8 2.1152 1.4 6.6 GRS 1758-258
274.0271 -13.9300 10.0 40.7 -3.5 1.1587 1.2 6.5 GX 17+2
275.9702 -30.2210 26.6 54.8 -14.8 0.8634 0.4 9.1 H1820-303
284.9817 -24.9220 5.4 47.6 -22.8 2.6811 2.1 3.0 HT1900.1-2455
288.8185 10.9303 1.5 11.9 -9.7 5.2329 7.8 1.5 GRS 1915+105
299.5658 35.2191 1.5 14.3 166.3 5.0732 7.8 1.6 Cyg X-1
307.9683 41.0406 6.1 22.6 175.4 1.2896 1.9 8.3 Cyg X-3
326.2603 38.3645 8.8 32.4 -161.5 0.9921 1.3 4.9 Cyg X-2
252.8796 7.7894 3.2 41.7 43.1 5.4162 3.5 ------ UNKNOWN
305.1454 50.3073 2.8 29.8 161.2 2.9569 4.2 ------ UNKNOWN
315.1135 -16.4557 4.3 43.7 -64.0 9.4645 2.7 ------ UNKNOWN
344.9479 18.3891 3.6 48.0 -129.0 10.3612 3.2 ------ UNKNOWN
347.3899 20.9209 2.7 49.7 -133.0 14.1081 4.3 ------ UNKNOWN
Plot creation:
Sat Mar 14 17:30:36 EDT 2015