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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
234.7591 -20.1819 0.0083 44.3644 -30.5427 4.0994776 23.178 TRIG_00534394
Foreground time interval of the image:
-22.580 35.565 (delta_t = 58.145 [sec])
Background time interval of the image:
-239.336 -22.580 (delta_t = 216.756 [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 4.096000
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 4.096000
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 4.096000
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 -22.580 sec. to 215.728 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.99952 ( -0.078984 0.0801652 )
Norm@50keV : 2.51367E-03 ( -0.000113995 0.000113216 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.29 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 57 degrees of freedom
# Null hypothesis probability = 4.277966e-01
Photon flux (15-150 keV) in 238.3 sec: 0.376968 ( -0.0162566 0.0163114 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.52351e-06 ( -2.39117e-07 2.4074e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -22.580 sec. to 215.728 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.57977 ( -0.357862 0.327667 )
Epeak [keV] : 46.0948 ( -13.6324 14.9827 )
Norm@50keV : 4.19120E-03 ( -0.00135213 0.0022604 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.41 using 59 PHA bins.
# Reduced chi-squared = 0.9537 for 56 degrees of freedom
# Null hypothesis probability = 5.735962e-01
Photon flux (15-150 keV) in 238.3 sec: 0.366180 ( -0.018119 0.018182 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.30937e-06 ( -2.90774e-07 2.90988e-07 ) ergs/cm2
Band function
Time interval is from -22.580 sec. to 215.728 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.05726 ( -0.660168 1.13464 )
beta : -2.22389 ( 2.22576 0.172029 )
Epeak [keV] : 38.4933 ( -8.50157 11.0836 )
Norm@50keV : 8.92488E-03 ( -0.00543647 0.0458862 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.84 using 59 PHA bins.
# Reduced chi-squared = 0.9244 for 55 degrees of freedom
# Null hypothesis probability = 6.340608e-01
Photon flux (15-150 keV) in 238.3 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.30582e-06 ( -5.30415e-06 -1.37523e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.0710 ( )
R^2/D10^2 : 0.112423 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 162.23 using 59 PHA bins.
# Reduced chi-squared = 2.8461 for 57 degrees of freedom
# Null hypothesis probability = 4.900172e-12
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.869e-07 5.123e-08
25- 50 1.959e-06 9.151e-08
50-150 1.363e-06 1.293e-07
15-150 4.008e-06 1.787e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 73.3370 (-9.15935 11.3138)
Norm : 1.77696 (-0.125308 0.137214)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.82 using 59 PHA bins.
# Reduced chi-squared = 0.9617 for 57 degrees of freedom
# Null hypothesis probability = 5.574423e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.091e-06 6.660e-08
25- 50 1.758e-06 7.042e-08
50-150 2.336e-06 2.188e-07
15-150 5.185e-06 2.478e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.27525 (-0.969319 0.902957)
R1^2/D10^2 : 0.427015 (-0.137834 0.265198)
kT2 [keV] : 24.7600 (-4.88282 7.83124)
R2^2/D10^2 : 3.35850E-03 (-0.00212104 0.0048408)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.36 using 59 PHA bins.
# Reduced chi-squared = 1.061 for 55 degrees of freedom
# Null hypothesis probability = 3.530805e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.847e-07 1.189e-07
25- 50 1.809e-06 2.116e-07
50-150 2.454e-06 7.982e-07
15-150 5.247e-06 9.615e-07
Peak spectrum fit
Power-law model
Time interval is from 99.212 sec. to 100.212 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.95087 ( -0.18624 0.19526 )
Norm@50keV : 1.15087E-02 ( -0.0014167 0.00138167 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.69 using 59 PHA bins.
# Reduced chi-squared = 0.8366 for 57 degrees of freedom
# Null hypothesis probability = 8.055118e-01
Photon flux (15-150 keV) in 1 sec: 1.68845 ( -0.16397 0.164055 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.05914e-07 ( -1.23656e-08 1.26124e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 99.212 sec. to 100.212 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.90270 ( )
Epeak [keV] : 87.5565 ( )
Norm@50keV : 1.22532E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.67 using 59 PHA bins.
# Reduced chi-squared = 0.8513 for 56 degrees of freedom
# Null hypothesis probability = 7.781653e-01
Photon flux (15-150 keV) in 1 sec: 1.68446 ( -0.17037 0.16685 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.05407e-07 ( -1.42776e-08 1.2968e-08 ) ergs/cm2
Band function
Time interval is from 99.212 sec. to 100.212 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.90184 ( 1.90184 0.541929 )
beta : -8.68616 ( 8.68526 18.6853 )
Epeak [keV] : 79.7630 ( -79.763 -79.763 )
Norm@50keV : 1.23118E-02 ( -0.00166191 0.00385267 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.67 using 59 PHA bins.
# Reduced chi-squared = 0.8668 for 55 degrees of freedom
# Null hypothesis probability = 7.479419e-01
Photon flux (15-150 keV) in 1 sec: 1.68449 ( ) 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] : 10.0909 (-1.29591 1.51407)
R^2/D10^2 : 0.729479 (-0.29905 0.504671)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.72 using 59 PHA bins.
# Reduced chi-squared = 1.399 for 57 degrees of freedom
# Null hypothesis probability = 2.512485e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.517e-08 2.565e-09
25- 50 3.821e-08 5.055e-09
50-150 2.047e-08 5.540e-09
15-150 7.386e-08 8.825e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 76.0417 (-22.0453 38.0694)
Norm : 7.97584 (-1.17707 1.48422)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.64 using 59 PHA bins.
# Reduced chi-squared = 0.8709 for 57 degrees of freedom
# Null hypothesis probability = 7.447967e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.062e-08 2.940e-09
25- 50 3.352e-08 3.730e-09
50-150 4.570e-08 1.710e-08
15-150 9.985e-08 1.632e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.30614 (-1.36406 1.54408)
R1^2/D10^2 : 6.38176 (-3.89989 15.4126)
kT2 [keV] : 20.7115 (-5.27812 9.65663)
R2^2/D10^2 : 3.74579E-02 (-0.0279018 0.0458187)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.18 using 59 PHA bins.
# Reduced chi-squared = 0.8760 for 55 degrees of freedom
# Null hypothesis probability = 7.307255e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.262e-08 8.805e-09
25- 50 3.032e-08 1.022e-08
50-150 5.048e-08 2.809e-08
15-150 1.034e-07 3.993e-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: 1.88244 ( -0.109475 0.111719 )
Norm@50keV : 4.84402E-03 ( -0.000324276 0.00032176 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.02 using 59 PHA bins.
# Reduced chi-squared = 1.088 for 57 degrees of freedom
# Null hypothesis probability = 3.018067e-01
Photon flux (15-150 keV) in 58.14 sec: 0.690044 ( -0.0441878 0.0443027 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.58902e-06 ( -1.72027e-07 1.72934e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.05983 ( -0.605079 0.52356 )
Epeak [keV] : 53.3003 ( -7.77502 16.8918 )
Norm@50keV : 1.31696E-02 ( -0.00612079 0.0142121 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.35 using 59 PHA bins.
# Reduced chi-squared = 0.9705 for 56 degrees of freedom
# Null hypothesis probability = 5.375938e-01
Photon flux (15-150 keV) in 58.14 sec: 0.660714 ( -0.047773 0.047782 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.42911e-06 ( -1.98659e-07 1.99897e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.06027 ( -0.232047 0.603163 )
beta : -10.00000 ( 10 5.32907e-15 )
Epeak [keV] : 53.2963 ( -7.76426 9.99226 )
Norm@50keV : 1.31612E-02 ( -0.000799833 0.014244 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.35 using 59 PHA bins.
# Reduced chi-squared = 0.9882 for 55 degrees of freedom
# Null hypothesis probability = 4.994666e-01
Photon flux (15-150 keV) in 58.14 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.44055e-06 ( -2.44015e-06 -1.89996e-07 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.66e-06
S(50-100 keV) = 1.66e-06
T90 vs. Hardness ratio plot
T90 = 168.223999977112 sec.
Hardness ratio (energy fluence ratio) = 1
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.13088
Count Ratio (50-100 keV) / (15-25 keV) = 0.573182
Mask shadow pattern
IMX = 8.423515396214318E-01, IMY = 4.970291649291343E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
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:
-239.336000 -22.580000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5358 -40.5402 15.2 48.7 -164.1 0.3392 0.8 0.9 Vela X-1
170.5763 -60.7672 16.6 19.4 -169.0 0.1373 0.7 11.5 Cen X-3
186.6539 -62.7759 1.7 11.5 -170.4 1.3695 6.9 0.3 GX 301-2
244.9804 -15.6402 1.0 51.7 -19.9 5.4881 11.3 0.1 Sco X-1
255.9937 -37.8488 2.3 36.2 7.4 1.1995 5.0 0.4 4U 1700-377
256.5639 -36.4710 31.6 37.6 6.7 0.0935 0.4 6.8 GX 349+2
263.0162 -24.6939 7.3 50.5 4.7 0.7259 1.6 3.1 GX 1+4
264.7575 -44.3801 4.7 35.1 23.3 0.6931 2.5 4.2 4U 1735-44
270.2488 -25.0574 3.9 53.4 12.2 2.3980 3.0 2.3 GX 5-1
270.2548 -25.8229 7.6 52.8 12.7 -1.1991 -1.5 5.4 GRS 1758-258
275.8022 -30.4816 0.0 51.5 21.1 1.7236 2.2 9.4 H1820-303
262.9816 -33.9265 4.3 42.6 11.3 0.9233 2.7 5.5 GX 354-0
103.8828 -71.4042 2.3 38.1 146.7 1.8058 5.0 ------ UNKNOWN
266.2964 -26.4045 1.1 50.5 9.2 5.6606 10.4 ------ UNKNOWN
218.5754 -14.6424 3.4 47.1 -53.2 3.2361 3.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-22.580000 35.564610
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5587 -40.5497 8.8 48.7 -164.1 -0.2666 -1.3 1.4 Vela X-1
170.3433 -60.6115 1093.5 19.5 -168.7 -0.0009 -0.0 1.1 Cen X-3
186.6515 -62.7750 3.8 11.5 -170.4 -0.2755 -3.1 0.3 GX 301-2
244.8060 -15.6474 6.1 51.6 -20.1 0.4612 1.9 10.0 Sco X-1
256.1893 -37.7705 9.5 36.3 7.5 0.1529 1.2 10.6 4U 1700-377
256.3738 -36.3795 51.0 37.5 6.4 -0.0301 -0.2 4.0 GX 349+2
263.0090 -24.7456 80.7 50.4 4.8 0.0352 0.1 0.0 GX 1+4
264.9596 -44.3560 0.0 35.2 23.4 -0.2346 -1.7 10.9 4U 1735-44
270.3371 -25.1608 6.4 53.4 12.3 -0.7253 -1.8 5.7 GX 5-1
270.3450 -25.7273 4.5 52.9 12.7 1.0141 2.6 2.5 GRS 1758-258
276.0042 -30.5175 5.2 51.5 21.3 -0.8649 -2.2 9.9 H1820-303
262.9072 -33.6860 6.3 42.7 11.0 0.3203 1.8 9.8 GX 354-0
252.0617 -25.6978 2.2 45.0 -6.5 0.8165 5.1 ------ UNKNOWN
252.7851 -17.4521 2.7 52.7 -10.3 1.0982 4.3 ------ UNKNOWN
234.7591 -20.1819 0.5 44.4 -30.5 4.0997 23.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
105.164590 962.748300
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
186.6400 -62.8297 12.4 53.6 -168.6 2.7366 0.9 3.6 GX 301-2
244.9742 -15.6341 0.2 10.7 53.2 34.7007 47.9 0.5 Sco X-1
256.0257 -37.9845 4.7 25.6 125.1 2.2050 2.5 8.6 4U 1700-377
256.3540 -36.5625 6.0 25.0 122.1 1.6342 1.9 9.2 GX 349+2
262.9502 -24.7396 5.5 26.4 91.7 2.3656 2.1 3.2 GX 1+4
264.5521 -44.3351 0.0 34.6 127.7 -1.0211 -0.7 10.7 4U 1735-44
268.4553 -1.6093 6.9 37.8 51.4 2.6870 1.7 10.8 SW J1753.5-0127
270.1802 -25.1381 3.7 33.0 91.9 4.8152 3.1 6.7 GX 5-1
270.2404 -25.7118 5.0 33.1 92.9 3.5714 2.3 3.8 GRS 1758-258
273.9675 -13.9557 85.0 37.9 73.4 0.3134 0.1 5.3 GX 17+2
275.9500 -30.3581 182.1 38.4 100.3 0.1438 0.1 1.4 H1820-303
262.9827 -33.7869 4.4 28.5 110.9 3.0762 2.7 2.9 GX 354-0
266.3024 -26.3978 0.6 29.6 94.7 23.8812 18.7 ------ UNKNOWN
263.5710 9.3560 3.1 40.9 33.0 5.1955 3.7 ------ UNKNOWN
248.4798 -47.3792 2.2 29.4 147.4 4.8210 5.2 ------ UNKNOWN
233.5683 -67.8550 2.5 47.7 167.1 8.2119 4.6 ------ UNKNOWN
243.2489 -15.8930 3.1 9.1 50.1 2.5727 3.8 ------ UNKNOWN
242.0683 21.4776 3.6 42.2 -3.4 3.9280 3.2 ------ UNKNOWN
Plot creation:
Sat May 30 18:19:33 EDT 2015