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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
124.2329 20.2354 0.0101 24.7213 20.0118 3.7022089 18.960 TRIG_00586289
Foreground time interval of the image:
-19.240 121.808 (delta_t = 141.048 [sec])
Background time interval of the image:
-439.255 -423.944 (delta_t = 15.311 [sec])
-239.456 -19.240 (delta_t = 220.216 [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)
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 -19.240 sec. to 121.808 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.07054 ( -0.140061 0.145355 )
Norm@50keV : 1.44182E-03 ( -0.000132607 0.000130401 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.03 using 59 PHA bins.
# Reduced chi-squared = 0.8426 for 57 degrees of freedom
# Null hypothesis probability = 7.954841e-01
Photon flux (15-150 keV) in 141 sec: 0.223594 ( -0.0159231 0.0159352 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.88383e-06 ( -1.57143e-07 1.5965e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -19.240 sec. to 121.808 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.67629 ( -0.633818 0.552595 )
Epeak [keV] : 34.2175 ( -28.5475 -34.2175 )
Norm@50keV : 2.42716E-03 ( -0.00113773 0.00314609 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.58 using 59 PHA bins.
# Reduced chi-squared = 0.8318 for 56 degrees of freedom
# Null hypothesis probability = 8.110583e-01
Photon flux (15-150 keV) in 141 sec: 0.219146 ( -0.017037 0.017026 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.80329e-06 ( -1.86966e-07 1.93889e-07 ) ergs/cm2
Band function
Time interval is from -19.240 sec. to 121.808 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.67632 ( 1.7719 0.618417 )
beta : -10.00000 ( 10 5.00933e-13 )
Epeak [keV] : 34.2101 ( -10.1071 -34.2101 )
Norm@50keV : 2.42658E-03 ( -0.000170604 0.0031504 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.58 using 59 PHA bins.
# Reduced chi-squared = 0.8469 for 55 degrees of freedom
# Null hypothesis probability = 7.833635e-01
Photon flux (15-150 keV) in 141 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] : 9.74941 (-0.840207 0.923905)
R^2/D10^2 : 0.109769 (-0.0326324 0.0464719)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 87.12 using 59 PHA bins.
# Reduced chi-squared = 1.528 for 57 degrees of freedom
# Null hypothesis probability = 6.263747e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.969e-07 3.553e-08
25- 50 7.118e-07 5.802e-08
50-150 3.450e-07 7.071e-08
15-150 1.354e-06 1.156e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 60.1753 (-12.1083 16.7616)
Norm : 1.15432 (-0.141411 0.155654)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.52 using 59 PHA bins.
# Reduced chi-squared = 0.8336 for 57 degrees of freedom
# Null hypothesis probability = 8.104069e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.093e-07 4.174e-08
25- 50 6.234e-07 4.660e-08
50-150 7.111e-07 1.304e-07
15-150 1.744e-06 1.607e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.84821 (-1.15231 1.37224)
R1^2/D10^2 : 1.13586 (-0.684908 2.75975)
kT2 [keV] : 16.1937 (-3.00482 5.13481)
R2^2/D10^2 : 1.16658E-02 (-0.00796231 0.0132834)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.64 using 59 PHA bins.
# Reduced chi-squared = 0.8661 for 55 degrees of freedom
# Null hypothesis probability = 7.491065e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.327e-07 1.554e-07
25- 50 5.860e-07 1.680e-07
50-150 7.035e-07 2.721e-07
15-150 1.722e-06 5.257e-07
Peak spectrum fit
Power-law model
Time interval is from 0.904 sec. to 1.904 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.32110 ( -0.420349 0.503322 )
Norm@50keV : 4.26110E-03 ( -0.00154219 0.00153709 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.97 using 59 PHA bins.
# Reduced chi-squared = 0.9118 for 57 degrees of freedom
# Null hypothesis probability = 6.636302e-01
Photon flux (15-150 keV) in 1 sec: 0.753498 ( -0.173063 0.173372 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.08806e-08 ( -1.18017e-08 1.2768e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.904 sec. to 1.904 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.846559 ( -3.72313 1.48223 )
Epeak [keV] : 26.9885 ( )
Norm@50keV : 3.88637E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.14 using 59 PHA bins.
# Reduced chi-squared = 0.8954 for 56 degrees of freedom
# Null hypothesis probability = 6.951274e-01
Photon flux (15-150 keV) in 1 sec: 0.738820 ( -0.167514 0.170821 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.60104e-08 ( -1.07786e-08 1.33484e-08 ) ergs/cm2
Band function
Time interval is from 0.904 sec. to 1.904 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -8.55449 -5 )
beta : -2.92132 ( -1.4715 0.702719 )
Epeak [keV] : 23.3759 ( -5.24375 4.43671 )
Norm@50keV : 1620.25 ( -355.914 7124.14 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.18 using 59 PHA bins.
# Reduced chi-squared = 0.8761 for 55 degrees of freedom
# Null hypothesis probability = 7.306161e-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] : 7.08636 (-1.68674 2.3553)
R^2/D10^2 : 1.39690 (-0.951165 2.84893)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.08 using 59 PHA bins.
# Reduced chi-squared = 0.9137 for 57 degrees of freedom
# Null hypothesis probability = 6.596660e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.141e-08 5.154e-09
25- 50 1.600e-08 8.398e-09
50-150 2.771e-09 2.033e-09
15-150 3.018e-08 1.437e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 36.7580 (-15.5131 33.5305)
Norm : 5.27797 (-1.82935 3.20122)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.28 using 59 PHA bins.
# Reduced chi-squared = 0.8822 for 57 degrees of freedom
# Null hypothesis probability = 7.231953e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.176e-08 3.834e-09
25- 50 1.489e-08 5.633e-09
50-150 1.048e-08 7.230e-09
15-150 3.713e-08 1.602e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.01889 (-2.01565 2.4773)
R1^2/D10^2 : 4.10912 (-3.13389 22.7979)
kT2 [keV] : 14.2602 (-7.37055 37.1578)
R2^2/D10^2 : 4.83856E-02 (-0.0475538 0.950561)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.87 using 59 PHA bins.
# Reduced chi-squared = 0.8886 for 55 degrees of freedom
# Null hypothesis probability = 7.064602e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.222e-08 7.035e-09
25- 50 1.454e-08 7.490e-09
50-150 1.089e-08 8.075e-09
15-150 3.766e-08 2.061e-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: 2.07054 ( -0.140061 0.145355 )
Norm@50keV : 1.44182E-03 ( -0.000132607 0.000130401 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.03 using 59 PHA bins.
# Reduced chi-squared = 0.8426 for 57 degrees of freedom
# Null hypothesis probability = 7.954841e-01
Photon flux (15-150 keV) in 141 sec: 0.223594 ( -0.0159231 0.0159352 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.88383e-06 ( -1.57143e-07 1.5965e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.67629 ( -0.633818 0.552595 )
Epeak [keV] : 34.2175 ( -28.5475 -34.2175 )
Norm@50keV : 2.42716E-03 ( -0.00115768 0.00314477 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.58 using 59 PHA bins.
# Reduced chi-squared = 0.8318 for 56 degrees of freedom
# Null hypothesis probability = 8.110583e-01
Photon flux (15-150 keV) in 141 sec: 0.219146 ( -0.017037 0.017026 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.80329e-06 ( -1.86966e-07 1.93889e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.67632 ( 1.7719 0.618417 )
beta : -10.00000 ( 10 3.55271e-15 )
Epeak [keV] : 34.2101 ( -10.1071 -34.2101 )
Norm@50keV : 2.42658E-03 ( -0.000170604 0.0031504 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.58 using 59 PHA bins.
# Reduced chi-squared = 0.8469 for 55 degrees of freedom
# Null hypothesis probability = 7.833635e-01
Photon flux (15-150 keV) in 141 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) = 5.78e-07
S(50-100 keV) = 5.51e-07
T90 vs. Hardness ratio plot
T90 = 109.531999945641 sec.
Hardness ratio (energy fluence ratio) = 0.953287
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.92639
Count Ratio (50-100 keV) / (15-25 keV) = 0.443745
Mask shadow pattern
IMX = 4.326020253788569E-01, IMY = -1.575552783659648E-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:
-439.255400 -423.944400
-239.456000 -19.240000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.6136 22.0169 0.9 51.4 -27.0 6.4418 12.7 1.1 Crab
135.5305 -40.5557 0.9 37.0 -157.9 3.5211 13.4 0.1 Vela X-1
97.1589 -34.8762 3.1 42.6 -109.9 2.9837 3.7 ------ UNKNOWN
83.8420 -3.4463 2.4 44.9 -60.3 4.1175 4.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-19.240000 121.808000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.6279 22.0512 5.4 51.4 -26.9 1.0678 2.1 2.2 Crab
135.4021 -40.5711 4.1 37.0 -157.8 0.6885 2.8 5.8 Vela X-1
124.2329 20.2355 0.6 24.7 20.0 3.7021 19.0 ------ UNKNOWN
85.6352 -7.3368 2.7 43.1 -65.9 3.1271 4.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
605.744590 826.444600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0061 -15.6515 0.7 28.0 85.7 7.4330 16.8 1.7 Sco X-1
254.5389 35.4263 16.6 52.8 162.7 -0.8717 -0.7 6.4 Her X-1
256.0399 -37.7042 7.9 28.5 33.4 -0.4788 -1.5 8.8 4U 1700-377
256.5681 -36.5847 6.2 27.4 34.2 0.5927 1.9 11.6 GX 349+2
263.0388 -24.7369 1.7 14.8 45.0 1.7910 6.8 1.7 GX 1+4
264.9253 -44.5202 6.9 31.4 15.1 0.5092 1.7 8.9 4U 1735-44
268.4366 -1.5160 4.6 13.7 158.5 0.6248 2.5 5.6 SW J1753.5-0127
270.3180 -24.9290 5.5 11.4 19.8 0.5978 2.1 9.2 GX 5-1
270.3868 -25.6964 3.0 12.1 18.3 1.0852 3.8 5.3 GRS 1758-258
274.0428 -13.9290 2.8 0.2 -163.0 1.1019 4.2 6.8 GX 17+2
275.9527 -30.3822 3.5 16.4 -3.4 0.9074 3.3 1.7 H1820-303
284.8767 -24.9542 46.1 14.9 -39.0 0.0638 0.2 8.9 HT1900.1-2455
288.7793 10.9524 1.0 29.0 -146.3 3.1691 11.4 1.2 GRS 1915+105
299.6181 35.0962 7.2 54.8 -151.8 2.1818 1.6 6.5 Cyg X-1
263.0131 -33.7927 4.0 22.1 27.5 0.8264 2.9 2.8 GX 354-0
266.1372 -28.7580 1.6 16.4 27.8 1.7788 7.1 ------ UNKNOWN
267.1112 7.7646 2.5 22.9 164.8 1.1818 4.6 ------ UNKNOWN
266.9363 40.0509 2.9 54.5 176.0 4.4482 3.9 ------ UNKNOWN
274.1951 -0.1502 3.1 13.9 -176.6 0.9391 3.8 ------ UNKNOWN
281.8305 -58.6647 3.0 45.0 -3.1 1.7526 3.8 ------ UNKNOWN
290.8883 -2.5085 2.8 20.3 -120.6 1.1106 4.1 ------ UNKNOWN
UNKNOWN
Plot creation:
Sat May 30 14:26:21 EDT 2015