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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
303.7845 6.2557 0.0170 16.9639 64.2521 0.7372550 11.329 TRIG_00534402
Foreground time interval of the image:
-2.928 26.644 (delta_t = 29.572 [sec])
Background time interval of the image:
-239.936 -2.928 (delta_t = 237.008 [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 26.880000
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 26.880000
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 26.880000
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 -2.928 sec. to 26.644 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.80088 ( -0.225863 0.235511 )
Norm@50keV : 1.42934E-03 ( -0.000224775 0.000220845 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.83 using 59 PHA bins.
# Reduced chi-squared = 0.8917 for 57 degrees of freedom
# Null hypothesis probability = 7.045050e-01
Photon flux (15-150 keV) in 29.57 sec: 0.197026 ( -0.0267275 0.0267376 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.89106e-07 ( -6.13879e-08 6.28824e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.928 sec. to 26.644 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.331977 ( -1.9306 1.4207 )
Epeak [keV] : 44.4008 ( -6.82742 13.9451 )
Norm@50keV : 2.48497E-02 ( -0.0253726 0.31281 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.35 using 59 PHA bins.
# Reduced chi-squared = 0.7740 for 56 degrees of freedom
# Null hypothesis probability = 8.916771e-01
Photon flux (15-150 keV) in 29.57 sec: 0.183926 ( -0.027466 0.027731 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.216e-07 ( -5.70391e-08 6.85433e-08 ) ergs/cm2
Band function
Time interval is from -2.928 sec. to 26.644 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.713651 ( -1.7295 -0.758449 )
beta : -2.94353 ( 2.9363 0.890618 )
Epeak [keV] : 41.7759 ( -11.0285 10.7801 )
Norm@50keV : 4.45583E-02 ( -0.0506048 22.0903 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.80 using 59 PHA bins.
# Reduced chi-squared = 0.7782 for 55 degrees of freedom
# Null hypothesis probability = 8.844541e-01
Photon flux (15-150 keV) in 29.57 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.42293e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.9099 (-1.35747 1.58488)
R^2/D10^2 : 7.13271E-02 (-0.0288234 0.0464552)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.57 using 59 PHA bins.
# Reduced chi-squared = 0.7820 for 57 degrees of freedom
# Null hypothesis probability = 8.844741e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.237e-08 1.172e-08
25- 50 1.465e-07 2.579e-08
50-150 9.788e-08 3.327e-08
15-150 2.968e-07 5.476e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 85.5283 (-29.5069 64.5144)
Norm : 0.921294 (-0.164356 0.205592)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.07 using 59 PHA bins.
# Reduced chi-squared = 0.8258 for 57 degrees of freedom
# Null hypothesis probability = 8.230410e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.095e-08 1.329e-08
25- 50 1.186e-07 2.029e-08
50-150 1.750e-07 9.536e-08
15-150 3.646e-07 1.145e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 199.166 ( )
R1^2/D10^2 : 8.36837E-06 (-9.22202e-06 0.0595361)
kT2 [keV] : 10.3393 (-1.53426 1.48082)
R2^2/D10^2 : 8.27696E-02 (-0.0312112 2.82031)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.42 using 59 PHA bins.
#Fit statistic : Chi-Squared = 41.92 using 59 PHA bins.
# Reduced chi-squared = 0.7895 for 55 degrees of freedom
# Reduced chi-squared = 0.7621 for 55 degrees of freedom
# Null hypothesis probability = 8.702345e-01
# Null hypothesis probability = 9.028317e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.876e-08 4.484e-08
25- 50 1.390e-07 1.386e-07
50-150 1.232e-07 1.313e-07
15-150 3.209e-07 2.888e-07
Peak spectrum fit
Power-law model
Time interval is from 24.668 sec. to 25.668 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.82965 ( -0.372584 0.404622 )
Norm@50keV : 4.49935E-03 ( -0.00123374 0.00120097 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.93 using 59 PHA bins.
# Reduced chi-squared = 1.051 for 57 degrees of freedom
# Null hypothesis probability = 3.700707e-01
Photon flux (15-150 keV) in 1 sec: 0.627276 ( -0.146003 0.146081 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.13828e-08 ( -1.1087e-08 1.15541e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 24.668 sec. to 25.668 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.01428 ( -7.50229 2.41168 )
Epeak [keV] : 42.3791 ( -8.67705 24.2369 )
Norm@50keV : 0.209562 ( -0.27968 5374.64 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.38 using 59 PHA bins.
# Reduced chi-squared = 0.9889 for 56 degrees of freedom
# Null hypothesis probability = 4.982541e-01
Photon flux (15-150 keV) in 1 sec: 0.576078 ( -0.151886 0.154173 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.27342e-08 ( -9.4251e-09 1.2745e-08 ) ergs/cm2
Band function
Time interval is from 24.668 sec. to 25.668 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.64385 ( -2.71389 -1.40023 )
beta : -3.51973 ( 9.37167 19.369 )
Epeak [keV] : 39.4432 ( -8.17154 24.0383 )
Norm@50keV : 2.11122 ( -2.10877 27.9381 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.57 using 59 PHA bins.
# Reduced chi-squared = 0.9922 for 55 degrees of freedom
# Null hypothesis probability = 4.908819e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.50504e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.6146 (-1.99167 2.63424)
R^2/D10^2 : 0.259397 (-0.149151 0.308579)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.35 using 59 PHA bins.
# Reduced chi-squared = 0.9710 for 57 degrees of freedom
# Null hypothesis probability = 5.372216e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.058e-09 3.052e-09
25- 50 1.635e-08 6.830e-09
50-150 1.011e-08 5.253e-09
15-150 3.252e-08 1.374e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 79.9045 (-37.756 -79.9239)
Norm : 3.02154 (-0.865051 1.18848)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.93 using 59 PHA bins.
# Reduced chi-squared = 1.016 for 57 degrees of freedom
# Null hypothesis probability = 4.408889e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.840e-09 3.056e-09
25- 50 1.290e-08 6.226e-09
50-150 1.820e-08 1.478e-08
15-150 3.894e-08 2.148e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.331161 (-0.285385 13.0254)
R1^2/D10^2 : 6.04968E+15 ( )
kT2 [keV] : 10.7575 (-2.03362 2.74994)
R2^2/D10^2 : 0.244309 (-0.142905 0.299379)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.35 using 59 PHA bins.
#Fit statistic : Chi-Squared = 55.05 using 59 PHA bins.
# Reduced chi-squared = 1.006 for 55 degrees of freedom
# Reduced chi-squared = 1.001 for 55 degrees of freedom
# Null hypothesis probability = 4.613451e-01
# Null hypothesis probability = 4.726734e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.002e-09 1.962e+09
25- 50 1.634e-08 1.667e+10
50-150 1.029e-08 4.060e+11
15-150 3.263e-08 4.246e+11
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: 1.80088 ( -0.225863 0.235511 )
Norm@50keV : 1.42934E-03 ( -0.000224775 0.000220845 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.83 using 59 PHA bins.
# Reduced chi-squared = 0.8917 for 57 degrees of freedom
# Null hypothesis probability = 7.045050e-01
Photon flux (15-150 keV) in 29.57 sec: 0.197026 ( -0.0267275 0.0267376 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.89106e-07 ( -6.13879e-08 6.28824e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.331977 ( -1.9306 1.4207 )
Epeak [keV] : 44.4008 ( -6.82742 13.9451 )
Norm@50keV : 2.48497E-02 ( -0.0253726 0.31281 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.35 using 59 PHA bins.
# Reduced chi-squared = 0.7740 for 56 degrees of freedom
# Null hypothesis probability = 8.916771e-01
Photon flux (15-150 keV) in 29.57 sec: 0.183926 ( -0.027466 0.027731 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.216e-07 ( -5.70391e-08 6.85433e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.713651 ( -1.7295 -0.758449 )
beta : -2.94353 ( 2.9363 0.890618 )
Epeak [keV] : 41.7759 ( -11.0285 10.7801 )
Norm@50keV : 4.45583E-02 ( -0.0506048 22.0911 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.80 using 59 PHA bins.
# Reduced chi-squared = 0.7782 for 55 degrees of freedom
# Null hypothesis probability = 8.844541e-01
Photon flux (15-150 keV) in 29.57 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.42293e-07 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.10e-07
S(50-100 keV) = 1.26e-07
T90 vs. Hardness ratio plot
T90 = 26.0759999752045 sec.
Hardness ratio (energy fluence ratio) = 1.14545
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.34313
Count Ratio (50-100 keV) / (15-25 keV) = 0.549732
Mask shadow pattern
IMX = 1.325140760758239E-01, IMY = -2.747554641792647E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 26.880000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 26.880000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 26.880000
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:
-239.936000 -2.928000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4979 35.3618 2.8 46.5 -43.9 2.4758 4.1 2.3 Her X-1
256.0226 -37.7462 14.4 48.2 -152.0 -0.4050 -0.8 6.1 4U 1700-377
256.2935 -36.4488 5.6 47.2 -151.0 0.9459 2.0 7.0 GX 349+2
263.1250 -24.6891 4.7 34.8 -144.3 0.6594 2.4 7.2 GX 1+4
264.5886 -44.5024 4.4 49.6 -164.3 1.3744 2.6 7.3 4U 1735-44
268.3355 -1.5134 4.6 19.5 -102.1 0.5250 2.5 4.1 SW J1753.5-0127
270.2118 -25.0174 4.2 30.7 -153.6 0.6436 2.7 5.4 GX 5-1
270.2386 -25.6295 4.4 31.2 -154.3 0.6079 2.6 7.6 GRS 1758-258
274.0703 -14.0821 2.7 20.0 -143.7 0.9080 4.2 4.6 GX 17+2
275.7777 -30.3739 3.3 33.0 -166.7 0.8248 3.5 7.6 H1820-303
285.1019 -24.7762 10.3 25.5 179.7 0.2463 1.1 9.4 HT1900.1-2455
288.8066 10.9537 1.1 10.4 -0.2 2.0776 10.5 0.7 GRS 1915+105
299.5460 35.1972 3.5 36.3 10.5 0.9766 3.3 2.2 Cyg X-1
307.9949 41.1358 0.0 44.5 15.9 0.8288 1.8 12.2 Cyg X-3
263.0349 -33.7709 3.6 41.5 -154.2 1.0530 3.2 4.5 GX 354-0
282.0183 -46.1384 3.2 47.0 179.6 1.4437 3.6 ------ UNKNOWN
287.7809 54.5159 2.5 53.9 -5.9 2.8008 4.7 ------ UNKNOWN
271.5017 -22.7087 2.8 28.2 -152.7 0.9527 4.2 ------ UNKNOWN
266.2939 -26.4101 0.4 34.0 -150.0 6.5958 27.0 ------ UNKNOWN
251.6966 -49.3046 3.7 58.7 -159.2 4.2287 3.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-2.928000 26.644000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3593 35.4269 8.3 46.7 -44.0 -0.2430 -1.4 7.0 Her X-1
255.9866 -37.8442 430.8 48.3 -152.1 0.0039 0.0 0.0 4U 1700-377
256.5682 -36.5074 5.6 47.0 -151.2 0.2745 2.1 8.2 GX 349+2
263.1503 -24.7983 5.0 34.8 -144.4 -0.1830 -2.3 8.3 GX 1+4
264.7124 -44.5326 5.2 49.6 -164.4 -0.2820 -2.2 5.1 4U 1735-44
268.3791 -1.5134 149.3 19.5 -102.1 0.0052 0.1 3.7 SW J1753.5-0127
270.4401 -25.0133 19.4 30.6 -153.9 -0.0423 -0.6 9.4 GX 5-1
270.1405 -25.8592 0.0 31.4 -154.4 0.0714 1.0 11.2 GRS 1758-258
274.1427 -14.1567 6.8 20.0 -144.0 -0.0988 -1.7 10.7 GX 17+2
275.7776 -30.4118 7.9 33.0 -166.7 -0.1095 -1.5 8.1 H1820-303
285.1759 -25.0017 4.7 25.7 179.5 -0.1633 -2.4 9.0 HT1900.1-2455
288.9584 11.0295 5.8 10.5 0.6 -0.1171 -2.0 10.7 GRS 1915+105
299.5729 35.1877 5.9 36.3 10.5 -0.1597 -1.9 1.2 Cyg X-1
307.9414 40.8394 0.0 44.2 16.1 0.3331 2.7 10.2 Cyg X-3
262.8684 -33.6473 0.0 41.5 -153.9 -0.1022 -1.0 12.8 GX 354-0
303.7845 6.2557 1.0 17.0 64.3 0.7372 11.3 ------ UNKNOWN
294.7120 48.3987 2.2 48.2 0.3 0.6784 5.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
123.764600 962.151200
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
268.2209 -1.5623 0.0 36.3 -104.8 0.2824 0.2 11.0 SW J1753.5-0127
270.2846 -25.0366 3.2 45.2 -138.8 4.0004 3.6 2.6 GX 5-1
270.3777 -25.8544 4.2 45.6 -139.7 3.1474 2.7 7.8 GRS 1758-258
273.8617 -13.9765 5.0 35.9 -128.0 1.7333 2.3 9.1 GX 17+2
275.8564 -30.3367 3.6 45.3 -149.0 3.1744 3.2 4.0 H1820-303
284.9707 -25.0565 6.2 36.3 -154.0 1.0584 1.8 8.9 HT1900.1-2455
288.8147 10.9447 0.7 15.5 -74.9 8.3744 15.4 1.0 GRS 1915+105
299.5497 35.2501 2.9 29.3 -10.7 1.9429 4.0 3.5 Cyg X-1
308.0855 41.0000 2.8 35.0 2.1 2.5636 4.1 3.1 Cyg X-3
326.0670 38.3284 6.2 37.9 25.4 1.5903 1.9 4.9 Cyg X-2
327.2425 59.1355 3.0 55.9 10.7 12.1142 3.9 ------ UNKNOWN
310.3740 -47.2830 2.7 53.8 170.9 9.1986 4.3 ------ UNKNOWN
302.8926 41.3852 3.8 35.2 -4.7 1.8059 3.1 ------ UNKNOWN
287.0521 -49.2671 3.3 57.4 -170.7 9.5922 4.2 ------ UNKNOWN
286.7370 -49.1512 4.8 57.4 -170.4 7.4526 3.3 ------ UNKNOWN
285.7515 17.3955 3.5 20.8 -59.7 1.5391 3.3 ------ UNKNOWN
277.2184 57.7078 3.3 55.5 -20.5 5.9800 3.6 ------ UNKNOWN
266.7089 57.4373 3.0 58.8 -25.9 12.5107 3.9 ------ UNKNOWN
266.2805 -26.3902 1.1 48.8 -137.2 20.6701 10.3 ------ UNKNOWN
Plot creation:
Sat May 30 18:17:14 EDT 2015