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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
309.2837 -24.7257 0.0072 48.7603 155.8505 13.4439160 26.621 TRIG_00556753
Foreground time interval of the image:
-11.800 17.701 (delta_t = 29.501 [sec])
Background time interval of the image:
-644.699 -630.292 (delta_t = 14.408 [sec])
-239.800 -11.800 (delta_t = 228.000 [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 -11.800 sec. to 164.200 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16667 ( -0.0655488 0.0649779 )
Norm@50keV : 7.35439E-03 ( -0.000265596 0.000264573 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.71 using 59 PHA bins.
# Reduced chi-squared = 0.8720 for 57 degrees of freedom
# Null hypothesis probability = 7.426208e-01
Photon flux (15-150 keV) in 176 sec: 0.859424 ( -0.0333574 0.0335074 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.32588e-05 ( -4.82298e-07 4.82877e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -11.800 sec. to 164.200 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16371 ( -0.123837 0.0636399 )
Epeak [keV] : 9999.35 ( -9999.36 -9999.36 )
Norm@50keV : 7.39297E-03 ( -0.00026386 0.00125913 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.76 using 59 PHA bins.
# Reduced chi-squared = 0.8886 for 56 degrees of freedom
# Null hypothesis probability = 7.086324e-01
Photon flux (15-150 keV) in 176 sec: 0.859910 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.3262e-05 ( -4.80357e-07 4.7615e-07 ) ergs/cm2
Band function
Time interval is from -11.800 sec. to 164.200 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.997153 ( 0.919508 0.919508 )
beta : -1.18579 ( -0.0649467 0.0656058 )
Epeak [keV] : 243.206 ( -242.15 -242.15 )
Norm@50keV : 9.11391E-03 ( -0.00202894 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.50 using 59 PHA bins.
# Reduced chi-squared = 0.9001 for 55 degrees of freedom
# Null hypothesis probability = 6.838623e-01
Photon flux (15-150 keV) in 176 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] : 21.3272 ( )
R^2/D10^2 : 3.17569E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 228.19 using 59 PHA bins.
# Reduced chi-squared = 4.0034 for 57 degrees of freedom
# Null hypothesis probability = 2.415114e-22
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.771e-07 3.546e-08
25- 50 2.476e-06 1.487e-07
50-150 8.403e-06 4.690e-07
15-150 1.136e-05 4.356e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 3.70714 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 167.13 using 59 PHA bins.
# Reduced chi-squared = 2.9320 for 57 degrees of freedom
# Null hypothesis probability = 9.451476e-13
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.625e-06 6.266e-08
25- 50 3.125e-06 1.126e-07
50-150 6.854e-06 2.658e-07
15-150 1.160e-05 4.215e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.5266 (-1.37071 1.46823)
R1^2/D10^2 : 0.216894 (-0.0668447 0.109488)
kT2 [keV] : 51.9315 (-11.8172 28.1579)
R2^2/D10^2 : 1.70895E-03 (-0.00109088 0.00183536)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.35 using 59 PHA bins.
# Reduced chi-squared = 0.9518 for 55 degrees of freedom
# Null hypothesis probability = 5.764668e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.609e-07 1.136e-07
25- 50 2.961e-06 2.772e-07
50-150 9.351e-06 1.940e-06
15-150 1.327e-05 2.296e-06
Peak spectrum fit
Power-law model
Time interval is from -4.300 sec. to -3.300 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 9.43048 ( )
Norm@50keV : 1.80930E-06 ( -1.79502e-06 0.00663907 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.43 using 59 PHA bins.
# Reduced chi-squared = 1.218 for 57 degrees of freedom
# Null hypothesis probability = 1.249623e-01
Photon flux (15-150 keV) in 1 sec: 0.399975 ( -0.400483 0.686101 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.86134e-08 ( -2.86146e-08 3.57782e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -4.300 sec. to -3.300 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 9.34936 ( )
Epeak [keV] : 9999.36 ( )
Norm@50keV : 2.04466E-06 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.45 using 59 PHA bins.
# Reduced chi-squared = 1.240 for 56 degrees of freedom
# Null hypothesis probability = 1.068814e-01
Photon flux (15-150 keV) in 1 sec: 0.451551 0.271744 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.80439e-16 ( 0 0 ) ergs/cm2
Band function
Time interval is from -4.300 sec. to -3.300 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.41453 ( 1.29181 1.29181 )
beta : -9.35630 ( 1.60521 1.60521 )
Epeak [keV] : 0.781225 ( -26.8244 -26.8244 )
Norm@50keV : 1251.25 ( -1251.14 1.0195e+10 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.44 using 59 PHA bins.
# Reduced chi-squared = 1.263 for 55 degrees of freedom
# Null hypothesis probability = 9.099188e-02
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] : 36.8205 ( )
R^2/D10^2 : 1.70901E-03 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.29 using 59 PHA bins.
# Reduced chi-squared = 1.233 for 57 degrees of freedom
# Null hypothesis probability = 1.110534e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.511e-09 7.185e-09
25- 50 3.510e-09 2.773e-09
50-150 4.470e-11 8.250e-11
15-150 1.307e-08 1.146e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 1.30048 ( )
Norm : 5.08858E+05 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.96 using 59 PHA bins.
# Reduced chi-squared = 1.210 for 57 degrees of freedom
# Null hypothesis probability = 1.331165e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.507e-09 5.495e-09
25- 50 1.012e-09 1.059e-09
50-150 4.583e-12 1.306e-11
15-150 9.523e-09 6.640e-09
Double BB
R1^2/D10^2 : 1.36793E+08 ( )
kT2 [keV] : 77.6806 (-199.291 -199.291)
R2^2/D10^2 : 2.12977E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.16 using 59 PHA bins.
#Fit statistic : Chi-Squared = 69.09 using 59 PHA bins.
#Fit statistic : Chi-Squared = 67.45 using 59 PHA bins.
# Reduced chi-squared = 1.257 for 55 degrees of freedom
# Reduced chi-squared = 1.256 for 55 degrees of freedom
# Reduced chi-squared = 1.226 for 55 degrees of freedom
# Null hypothesis probability = 9.490156e-02
# Null hypothesis probability = 9.581908e-02
# Null hypothesis probability = 1.209179e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.376e-09 6.515e-09
25- 50 3.954e-09 2.154e-09
50-150 1.650e-08 9.890e-09
15-150 2.983e-08 1.447e-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: 1.00685 ( -0.0713175 0.0703319 )
Norm@50keV : 3.14900E-02 ( -0.00128829 0.00128235 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.65 using 59 PHA bins.
# Reduced chi-squared = 0.9587 for 57 degrees of freedom
# Null hypothesis probability = 5.638312e-01
Photon flux (15-150 keV) in 29.5 sec: 3.62663 ( -0.152936 0.153814 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00205e-05 ( -4.00049e-07 4.01415e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00073 ( -0.0718193 0.0708465 )
Epeak [keV] : 9999.35 ( -9999.35 -9999.35 )
Norm@50keV : 3.16777E-02 ( -0.00122305 0.00955572 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.65 using 59 PHA bins.
# Reduced chi-squared = 0.9758 for 56 degrees of freedom
# Null hypothesis probability = 5.262010e-01
Photon flux (15-150 keV) in 29.5 sec: 3.62560 ( -0.15886 0.15335 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00248e-05 ( -3.88338e-07 4.00758e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.251107 ( 0.783779 0.783779 )
beta : -1.06891 ( -0.0703478 0.0713446 )
Epeak [keV] : 90.4744 ( -90.4744 306.952 )
Norm@50keV : 8.43923E-02 ( -0.0467227 897115 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.91 using 59 PHA bins.
# Reduced chi-squared = 0.9621 for 55 degrees of freedom
# Null hypothesis probability = 5.547289e-01
Photon flux (15-150 keV) in 29.5 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) = 2.73e-06
S(50-100 keV) = 4.86e-06
T90 vs. Hardness ratio plot
T90 = 64 sec.
Hardness ratio (energy fluence ratio) = 1.78022
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.80213
Count Ratio (50-100 keV) / (15-25 keV) = 1.83544
Mask shadow pattern
IMX = -1.040862663714176E+00, IMY = -4.666803415466253E-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:
-644.699410 -630.291900
-239.800000 -11.800000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.4168 -60.6356 5.7 41.1 -5.2 0.6448 2.0 3.1 Cen X-3
186.6606 -62.7652 9.0 35.8 4.4 0.3817 1.3 0.3 GX 301-2
255.8959 -38.0172 6.5 39.1 87.2 1.7562 1.8 11.2 4U 1700-377
264.5889 -44.5218 7.1 31.0 95.0 0.7091 1.6 7.9 4U 1735-44
275.1702 -54.4532 2.8 19.6 104.2 1.0321 4.2 ------ UNKNOWN
319.8802 -19.9909 3.4 54.8 167.4 4.7239 3.5 ------ UNKNOWN
146.9880 -45.4890 3.5 59.5 -17.0 4.8279 3.3 ------ UNKNOWN
125.4661 -51.9410 3.7 55.1 -34.7 4.4437 3.1 ------ UNKNOWN
48.8672 -59.6168 3.0 40.8 -88.3 4.5069 3.9 ------ UNKNOWN
7.9572 -36.5153 3.0 51.0 -135.6 4.8801 3.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-11.800000 17.700600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.2168 -60.7162 5.3 41.1 -5.4 -0.2796 -2.2 6.3 Cen X-3
186.4347 -62.8376 5.9 35.8 4.2 0.2270 1.9 7.3 GX 301-2
256.0329 -37.9079 3.8 39.2 87.4 1.5289 3.0 4.4 4U 1700-377
264.9616 -44.4928 20.1 31.0 95.5 0.1295 0.6 9.7 4U 1735-44
220.9103 -41.3379 3.8 45.6 47.8 1.2618 3.1 ------ UNKNOWN
281.6635 -33.0668 2.5 40.0 121.2 1.9644 4.5 ------ UNKNOWN
309.2837 -24.7257 0.4 48.8 155.9 13.4432 26.6 ------ UNKNOWN
183.6073 -43.2733 2.0 54.3 13.6 2.5694 5.9 ------ UNKNOWN
338.8132 -34.3329 2.9 44.8 -166.7 0.6553 4.0 ------ UNKNOWN
154.4253 -45.2580 2.5 58.6 -11.0 2.2642 4.7 ------ UNKNOWN
357.2890 -38.6386 2.8 45.9 -145.0 0.7045 4.2 ------ UNKNOWN
50.2827 -59.9312 3.0 40.8 -87.1 1.1849 3.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
93.700590 962.270000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
264.8693 -44.5221 8.1 40.9 61.0 -3.4330 -1.4 6.9 4U 1735-44
270.3737 -25.0841 3.6 35.2 92.3 4.6216 3.2 4.9 GX 5-1
270.1514 -25.6066 0.0 35.3 91.3 -1.0166 -0.7 11.6 GRS 1758-258
273.8939 -14.1417 4.3 34.9 112.3 4.2515 2.7 9.1 GX 17+2
275.7582 -30.3096 5.1 30.1 83.0 2.5478 2.3 9.3 H1820-303
284.8712 -24.9661 4.8 22.1 95.5 -1.8147 -2.4 9.4 HT1900.1-2455
288.8033 10.9470 1.1 40.9 159.6 12.8436 10.3 0.3 GRS 1915+105
280.7428 -16.8086 2.7 27.8 112.3 3.9393 4.3 ------ UNKNOWN
285.3544 -5.8314 2.4 29.7 136.8 4.2901 4.9 ------ UNKNOWN
299.5766 -13.3391 2.7 14.6 150.7 2.2832 4.3 ------ UNKNOWN
12.2688 -60.9592 3.9 55.5 -20.4 6.7084 3.0 ------ UNKNOWN
7.6744 -41.2726 4.1 50.7 -44.6 11.0308 2.8 ------ UNKNOWN
Plot creation:
Sat May 30 16:47:49 EDT 2015