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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
310.8277 -0.7161 0.0086 32.9944 81.8430 2.2833218 22.433 TRIG_00503219
Foreground time interval of the image:
-4.884 10.925 (delta_t = 15.809 [sec])
Background time interval of the image:
-414.675 -398.746 (delta_t = 15.930 [sec])
-239.776 -4.884 (delta_t = 234.892 [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)
The mask-weighted light curves based on cleaned DPHs
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 -4.884 sec. to 99.792 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.38617 ( -0.0534658 0.0533808 )
Norm@50keV : 5.76658E-03 ( -0.000167168 0.000167167 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.06 using 59 PHA bins.
# Reduced chi-squared = 1.282 for 57 degrees of freedom
# Null hypothesis probability = 7.446894e-02
Photon flux (15-150 keV) in 104.7 sec: 0.700090 ( -0.0219839 0.0220357 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.85068e-06 ( -1.80908e-07 1.81211e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -4.884 sec. to 99.792 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.979583 ( -0.229331 0.218081 )
Epeak [keV] : 138.238 ( -30.7882 91.7629 )
Norm@50keV : 8.84714E-03 ( -0.00177124 0.00234102 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.52 using 59 PHA bins.
# Reduced chi-squared = 1.116 for 56 degrees of freedom
# Null hypothesis probability = 2.559859e-01
Photon flux (15-150 keV) in 104.7 sec: 0.681478 ( -0.023858 0.023926 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.70126e-06 ( -2.00082e-07 1.99129e-07 ) ergs/cm2
Band function
Time interval is from -4.884 sec. to 99.792 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.978801 ( -0.200573 0.181292 )
beta : -9.07059 ( 8.96033 18.9603 )
Epeak [keV] : 138.770 ( -18.0726 53.5243 )
Norm@50keV : 8.83433E-03 ( -0.00104946 0.00132117 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.52 using 59 PHA bins.
# Reduced chi-squared = 1.137 for 55 degrees of freedom
# Null hypothesis probability = 2.267597e-01
Photon flux (15-150 keV) in 104.7 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] : 17.6698 ( )
R^2/D10^2 : 4.54251E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 252.67 using 59 PHA bins.
# Reduced chi-squared = 4.4328 for 57 degrees of freedom
# Null hypothesis probability = 1.872493e-26
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.990e-07 1.717e-08
25- 50 1.364e-06 5.497e-08
50-150 3.075e-06 1.602e-07
15-150 4.738e-06 1.644e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 2.92814 (-0.0852406 0.0852119)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 97.64 using 59 PHA bins.
# Reduced chi-squared = 1.713 for 57 degrees of freedom
# Null hypothesis probability = 6.518702e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.634e-07 2.581e-08
25- 50 1.468e-06 4.502e-08
50-150 3.221e-06 1.063e-07
15-150 5.452e-06 1.769e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.75285 (-0.923437 1.01687)
R1^2/D10^2 : 0.433234 (-0.138876 0.227665)
kT2 [keV] : 27.7074 (-2.66156 3.65067)
R2^2/D10^2 : 7.95721E-03 (-0.00286294 0.0036)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.90 using 59 PHA bins.
# Reduced chi-squared = 1.144 for 55 degrees of freedom
# Null hypothesis probability = 2.168990e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.861e-07 7.015e-08
25- 50 1.422e-06 1.063e-07
50-150 3.672e-06 3.774e-07
15-150 5.681e-06 3.937e-07
Peak spectrum fit
Power-law model
Time interval is from 68.040 sec. to 69.040 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.19585 ( -0.0915569 0.0910268 )
Norm@50keV : 2.65235E-02 ( -0.00133959 0.00133959 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.17 using 59 PHA bins.
# Reduced chi-squared = 0.9153 for 57 degrees of freedom
# Null hypothesis probability = 6.564716e-01
Photon flux (15-150 keV) in 1 sec: 3.11151 ( -0.162031 0.162214 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.69408e-07 ( -1.52365e-08 1.53007e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 68.040 sec. to 69.040 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.09538 ( -0.357265 0.144135 )
Epeak [keV] : 491.384 ( -492.019 -492.019 )
Norm@50keV : 2.95609E-02 ( -0.00410515 0.0133982 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.91 using 59 PHA bins.
# Reduced chi-squared = 0.9270 for 56 degrees of freedom
# Null hypothesis probability = 6.302821e-01
Photon flux (15-150 keV) in 1 sec: 3.09612 ( -0.16958 0.16945 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.67788e-07 ( -1.6459e-08 8.179e-09 ) ergs/cm2
Band function
Time interval is from 68.040 sec. to 69.040 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.982611 ( 0.829526 0.829526 )
beta : -1.26970 ( 1.28525 0.175049 )
Epeak [keV] : 224.209 ( -208.289 -208.289 )
Norm@50keV : 3.41516E-02 ( -0.00872001 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.71 using 59 PHA bins.
# Reduced chi-squared = 0.9402 for 55 degrees of freedom
# Null hypothesis probability = 6.010876e-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] : 18.8652 ( )
R^2/D10^2 : 0.170673 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 131.51 using 59 PHA bins.
# Reduced chi-squared = 2.3072 for 57 degrees of freedom
# Null hypothesis probability = 8.042400e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.197e-08 1.140e-09
25- 50 5.728e-08 4.285e-09
50-150 1.496e-07 1.300e-08
15-150 2.189e-07 1.420e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 12.8486 (-0.662481 0.662386)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 94.42 using 59 PHA bins.
# Reduced chi-squared = 1.657 for 57 degrees of freedom
# Null hypothesis probability = 1.344970e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.200e-08 1.895e-09
25- 50 6.156e-08 3.635e-09
50-150 1.350e-07 8.600e-09
15-150 2.286e-07 1.915e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.55697 (-1.99247 2.11656)
R1^2/D10^2 : 1.37903 (-0.638892 1.77205)
kT2 [keV] : 34.9363 (-7.44805 15.8943)
R2^2/D10^2 : 1.93561E-02 (-0.0128911 0.0138603)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.77 using 59 PHA bins.
# Reduced chi-squared = 1.032 for 55 degrees of freedom
# Null hypothesis probability = 4.088332e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.246e-08 4.335e-09
25- 50 5.935e-08 1.018e-08
50-150 1.872e-07 5.789e-08
15-150 2.690e-07 6.200e-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: 1.31452 ( -0.106126 0.105481 )
Norm@50keV : 9.34868E-03 ( -0.000587616 0.000587604 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.45 using 59 PHA bins.
# Reduced chi-squared = 1.078 for 57 degrees of freedom
# Null hypothesis probability = 3.198032e-01
Photon flux (15-150 keV) in 15.81 sec: 1.11837 ( -0.0733807 0.0735093 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45545e-06 ( -9.88977e-08 9.92814e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.455757 ( -0.507013 0.4539 )
Epeak [keV] : 96.2258 ( -18.0328 47.711 )
Norm@50keV : 2.38578E-02 ( -0.00912147 0.0167786 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.03 using 59 PHA bins.
# Reduced chi-squared = 0.8934 for 56 degrees of freedom
# Null hypothesis probability = 6.990438e-01
Photon flux (15-150 keV) in 15.81 sec: 1.07594 ( -0.07649 0.07661 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.38511e-06 ( -1.06814e-07 1.06934e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.455679 ( -0.37104 0.417493 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 96.2089 ( -13.045 47.7081 )
Norm@50keV : 2.38599E-02 ( -0.00910193 0.0167964 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.03 using 59 PHA bins.
# Reduced chi-squared = 0.9097 for 55 degrees of freedom
# Null hypothesis probability = 6.644377e-01
Photon flux (15-150 keV) in 15.81 sec: 1.08389 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.38875e-06 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.37e-06
S(50-100 keV) = 2.09e-06
T90 vs. Hardness ratio plot
T90 = 79.5679998993874 sec.
Hardness ratio (energy fluence ratio) = 1.52555
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.5237
Count Ratio (50-100 keV) / (15-25 keV) = 1.29902
Mask shadow pattern
IMX = 9.212154169850038E-02, IMY = -6.426994306230007E-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:
-414.675400 -398.745800
-239.776000 -4.884000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9889 -15.6612 0.5 33.6 -101.0 7.9553 22.3 1.4 Sco X-1
254.5877 35.3196 16.5 49.6 -21.7 -0.2960 -0.7 6.5 Her X-1
256.0322 -37.8454 16.0 35.5 -144.2 0.1897 0.7 2.2 4U 1700-377
256.3969 -36.2965 4.2 34.2 -142.8 0.6652 2.7 7.8 GX 349+2
263.0639 -24.8926 6.8 22.0 -135.0 0.3512 1.7 9.3 GX 1+4
264.8158 -44.4396 7.7 37.7 -159.5 0.3942 1.5 3.2 4U 1735-44
268.2770 -1.5187 3.2 12.6 -51.4 0.6682 3.6 6.8 SW J1753.5-0127
270.3530 -25.0291 1.9 18.1 -150.8 1.1915 6.2 4.8 GX 5-1
270.3231 -25.6406 5.7 18.7 -151.6 0.4207 2.1 6.2 GRS 1758-258
274.0869 -13.8825 6.6 6.8 -134.8 0.3211 1.7 10.4 GX 17+2
275.8990 -30.2706 7.3 21.7 -169.2 0.3131 1.6 5.9 H1820-303
285.0790 -24.9581 7.4 17.3 164.4 0.3415 1.6 3.2 HT1900.1-2455
288.7985 10.9412 1.0 22.1 31.4 2.5201 11.6 0.3 GRS 1915+105
299.6388 35.1516 5.0 48.2 27.3 1.6365 2.3 3.8 Cyg X-1
262.9086 -33.7852 4.9 28.9 -147.9 0.4755 2.4 5.0 GX 354-0
318.6070 -36.5411 3.2 45.6 138.0 2.7992 3.6 ------ UNKNOWN
283.1147 -43.6548 2.8 35.1 178.6 1.0385 4.2 ------ UNKNOWN
273.0358 21.6521 2.8 30.9 -6.1 0.9476 4.2 ------ UNKNOWN
236.5852 -48.7102 2.8 53.3 -142.3 4.8006 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-4.884000 10.924610
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9528 -15.7493 42.1 33.7 -101.1 0.0205 0.3 6.7 Sco X-1
254.5877 35.3194 14.2 49.6 -21.7 0.0773 0.8 6.5 Her X-1
256.1082 -37.7258 4.9 35.4 -144.2 0.1356 2.3 9.1 4U 1700-377
256.4168 -36.5638 5.8 34.4 -143.2 0.1112 2.0 8.5 GX 349+2
262.9550 -24.8882 7.6 22.0 -134.8 -0.0695 -1.5 9.0 GX 1+4
264.9252 -44.6120 0.0 37.8 -159.7 0.1475 2.6 12.5 4U 1735-44
268.2131 -1.3152 0.0 12.8 -50.8 0.0451 1.1 12.4 SW J1753.5-0127
270.2745 -25.2275 4.4 18.3 -150.9 0.1122 2.7 8.9 GX 5-1
270.4625 -25.7442 4.1 18.7 -152.1 0.1318 3.1 8.6 GRS 1758-258
274.1513 -13.8960 33.3 6.8 -135.3 -0.0147 -0.3 11.9 GX 17+2
275.9188 -30.4533 5.9 21.8 -169.4 -0.0861 -2.0 5.2 H1820-303
285.1197 -24.8485 44.4 17.2 164.1 -0.0115 -0.3 6.3 HT1900.1-2455
288.7347 10.8380 5.3 22.0 31.4 -0.1067 -2.2 7.5 GRS 1915+105
299.4768 35.0738 0.0 48.0 27.2 0.4571 2.9 9.5 Cyg X-1
262.8407 -33.6835 23.6 28.9 -147.7 -0.0237 -0.5 11.7 GX 354-0
313.4288 -10.8628 2.8 34.3 100.7 0.4153 4.2 ------ UNKNOWN
310.8277 -0.7161 0.5 33.0 81.8 2.2833 22.4 ------ UNKNOWN
235.9632 -46.4358 2.1 52.4 -139.6 1.2068 5.6 ------ UNKNOWN
236.5813 -27.2293 2.3 43.8 -116.3 0.9107 5.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
65.324620 962.343100
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
270.3033 -25.1124 5.5 46.1 -128.8 3.2340 2.1 2.3 GX 5-1
270.1655 -25.5821 82.8 46.4 -129.3 -0.2314 -0.1 12.2 GRS 1758-258
274.0909 -14.1855 8.4 38.8 -115.6 -1.4233 -1.4 10.2 GX 17+2
276.0317 -30.3227 5.8 44.4 -138.7 1.8734 2.0 6.1 H1820-303
285.0902 -25.0028 3.3 34.8 -139.9 1.9416 3.5 5.7 HT1900.1-2455
288.8066 10.9551 0.9 24.8 -64.9 6.8805 12.3 0.8 GRS 1915+105
299.6237 35.2268 1.9 37.4 -18.7 3.2763 6.0 2.2 Cyg X-1
308.0940 40.9568 1.7 41.7 -6.7 4.5830 6.6 0.8 Cyg X-3
326.1258 38.4374 4.6 41.6 14.6 1.8646 2.5 7.3 Cyg X-2
344.2689 10.2047 3.0 35.0 67.4 4.3312 3.8 ------ UNKNOWN
341.1425 35.7567 3.3 46.1 31.1 4.5307 3.5 ------ UNKNOWN
313.1320 -18.9295 2.6 18.4 169.5 1.8011 4.4 ------ UNKNOWN
310.8196 -0.7528 1.4 0.0 -162.4 3.5420 8.3 ------ UNKNOWN
307.8151 8.1086 2.8 9.3 -22.3 1.6485 4.2 ------ UNKNOWN
285.1379 0.6280 2.9 25.7 -90.6 2.1925 4.0 ------ UNKNOWN
284.3243 46.5150 2.8 52.6 -26.3 4.9201 4.1 ------ UNKNOWN
270.7558 -45.2307 3.5 56.8 -150.7 8.6163 3.3 ------ UNKNOWN
269.6757 -4.4598 3.5 41.3 -99.5 7.9320 3.3 ------ UNKNOWN
Plot creation:
Sat May 30 21:36:43 EDT 2015