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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
294.0939 36.3576 0.0119 47.3802 22.9025 3.5894283 16.103 TRIG_00503652
Foreground time interval of the image:
-24.032 13.576 (delta_t = 37.608 [sec])
Background time interval of the image:
-520.051 -503.794 (delta_t = 16.257 [sec])
-239.552 -24.032 (delta_t = 215.520 [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 -24.032 sec. to 13.576 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64417 ( -0.167232 0.169438 )
Norm@50keV : 6.19071E-03 ( -0.000596224 0.000591938 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.77 using 59 PHA bins.
# Reduced chi-squared = 0.8205 for 57 degrees of freedom
# Null hypothesis probability = 8.312955e-01
Photon flux (15-150 keV) in 37.61 sec: 0.806810 ( -0.0777081 0.0780236 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.16672e-06 ( -2.20172e-07 2.21799e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -24.032 sec. to 13.576 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64233 ( -0.591325 1.0978 )
Epeak [keV] : 9650.78 ( )
Norm@50keV : 6.20451E-03 ( -0.00620457 0.00745246 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.76 using 59 PHA bins.
# Reduced chi-squared = 0.8351 for 56 degrees of freedom
# Null hypothesis probability = 8.056184e-01
Photon flux (15-150 keV) in 37.61 sec: 0.804615 ( -0.080093 0.079654 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.15901e-06 ( -2.39771e-07 2.28849e-07 ) ergs/cm2
Band function
Time interval is from -24.032 sec. to 13.576 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.577876 ( 0.975816 0.975816 )
beta : -1.74523 ( 1.73459 0.235193 )
Epeak [keV] : 43.7513 ( -43.6786 264.268 )
Norm@50keV : 2.99942E-02 ( -0.0304277 568.198 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.02 using 59 PHA bins.
# Reduced chi-squared = 0.8367 for 55 degrees of freedom
# Null hypothesis probability = 8.004968e-01
Photon flux (15-150 keV) in 37.61 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] : 13.2395 (-1.62441 1.93002)
R^2/D10^2 : 0.134689 (-0.052372 0.0830208)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.23 using 59 PHA bins.
# Reduced chi-squared = 1.408 for 57 degrees of freedom
# Null hypothesis probability = 2.296070e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.882e-07 3.705e-08
25- 50 6.611e-07 8.049e-08
50-150 7.404e-07 1.519e-07
15-150 1.590e-06 2.003e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 162.721 (-58.2853 -162.718)
Norm : 3.29093 (-0.344272 0.414521)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.51 using 59 PHA bins.
# Reduced chi-squared = 0.8335 for 57 degrees of freedom
# Null hypothesis probability = 8.105795e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.155e-07 6.520e-08
25- 50 5.916e-07 2.459e-07
50-150 1.206e-06 6.399e-07
15-150 2.114e-06 8.148e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.93226 (-1.57168 1.70277)
R1^2/D10^2 : 0.665071 (-0.322729 0.76476)
kT2 [keV] : 35.9666 (-11.42 36.1381)
R2^2/D10^2 : 3.07331E-03 (-0.00257335 0.00808957)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.38 using 59 PHA bins.
# Reduced chi-squared = 0.8070 for 55 degrees of freedom
# Null hypothesis probability = 8.463798e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.036e-07 9.713e-08
25- 50 6.248e-07 1.891e-07
50-150 1.266e-06 5.969e-07
15-150 2.195e-06 7.970e-07
Peak spectrum fit
Power-law model
Time interval is from 2.872 sec. to 3.872 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.26426 ( -0.361508 0.350487 )
Norm@50keV : 1.83657E-02 ( -0.00382191 0.00381775 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.21 using 59 PHA bins.
# Reduced chi-squared = 0.7756 for 57 degrees of freedom
# Null hypothesis probability = 8.921341e-01
Photon flux (15-150 keV) in 1 sec: 2.17730 ( -0.476648 0.480657 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.83121e-07 ( -4.02126e-08 4.05447e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.872 sec. to 3.872 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.748297 ( -1.71157 0.94306 )
Epeak [keV] : 133.060 ( -133.064 -133.064 )
Norm@50keV : 3.20477E-02 ( -0.0170593 0.152793 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.77 using 59 PHA bins.
# Reduced chi-squared = 0.7817 for 56 degrees of freedom
# Null hypothesis probability = 8.825132e-01
Photon flux (15-150 keV) in 1 sec: 2.13488 ( -0.48654 0.49185 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.78872e-07 ( -4.2838e-08 4.2277e-08 ) ergs/cm2
Band function
Time interval is from 2.872 sec. to 3.872 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -1.46827 ( -0.531719 0.437739 )
Epeak [keV] : 31.8904 ( -31.8902 19.1946 )
Norm@50keV : 387.986 ( -79.2563 6.54269e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.38 using 59 PHA bins.
# Reduced chi-squared = 0.7705 for 55 degrees of freedom
# Null hypothesis probability = 8.934852e-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] : 18.8871 (-4.44809 6.16958)
R^2/D10^2 : 0.120690 (-0.0742937 0.179148)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.81 using 59 PHA bins.
# Reduced chi-squared = 0.8387 for 57 degrees of freedom
# Null hypothesis probability = 8.020346e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.481e-09 3.803e-09
25- 50 4.062e-08 1.670e-08
50-150 1.064e-07 4.294e-08
15-150 1.555e-07 5.902e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 9.20239 (-1.9354 1.93515)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.84 using 59 PHA bins.
# Reduced chi-squared = 0.8043 for 57 degrees of freedom
# Null hypothesis probability = 8.550968e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.293e-08 1.370e-08
25- 50 4.410e-08 2.527e-08
50-150 9.673e-08 5.600e-08
15-150 1.638e-07 9.480e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.62658 (-3.47421 8.13661)
R1^2/D10^2 : 1.46791 (-1.27782 3.26388)
kT2 [keV] : 29.6018 (-20.6948 -29.6763)
R2^2/D10^2 : 2.19149E-02 (-0.0213687 0.0725183)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.89 using 59 PHA bins.
# Reduced chi-squared = 0.7798 for 55 degrees of freedom
# Null hypothesis probability = 8.824551e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.789e-08 1.011e-08
25- 50 4.249e-08 2.292e-08
50-150 1.210e-07 6.575e-08
15-150 1.813e-07 9.775e-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: 1.64417 ( -0.167232 0.169438 )
Norm@50keV : 6.19071E-03 ( -0.000596224 0.000591938 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.77 using 59 PHA bins.
# Reduced chi-squared = 0.8205 for 57 degrees of freedom
# Null hypothesis probability = 8.312955e-01
Photon flux (15-150 keV) in 37.61 sec: 0.806810 ( -0.0777081 0.0780236 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.16672e-06 ( -2.20172e-07 2.21799e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64233 ( -0.591325 1.0978 )
Epeak [keV] : 9650.78 ( )
Norm@50keV : 6.20451E-03 ( -0.00620457 0.00745246 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.76 using 59 PHA bins.
# Reduced chi-squared = 0.8351 for 56 degrees of freedom
# Null hypothesis probability = 8.056184e-01
Photon flux (15-150 keV) in 37.61 sec: 0.804615 ( -0.080093 0.079654 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.15901e-06 ( -2.39771e-07 2.28849e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.577876 ( 0.975816 0.975816 )
beta : -1.74523 ( 1.73459 0.235193 )
Epeak [keV] : 43.7513 ( -43.6786 264.268 )
Norm@50keV : 2.99942E-02 ( -0.0304277 568.188 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.02 using 59 PHA bins.
# Reduced chi-squared = 0.8367 for 55 degrees of freedom
# Null hypothesis probability = 8.004968e-01
Photon flux (15-150 keV) in 37.61 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) = 5.73e-07
S(50-100 keV) = 7.33e-07
T90 vs. Hardness ratio plot
T90 = 32.5479999780655 sec.
Hardness ratio (energy fluence ratio) = 1.27923
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.47091
Count Ratio (50-100 keV) / (15-25 keV) = 1.03906
Mask shadow pattern
IMX = 1.001069459169128E+00, IMY = -4.229192195949183E-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:
-520.051400 -503.794100
-239.552000 -24.032000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9820 -15.6490 0.4 33.6 -99.2 12.1027 30.7 0.5 Sco X-1
254.5872 35.3245 20.3 49.6 -19.9 -0.2879 -0.6 6.4 Her X-1
256.0451 -37.8123 2.1 35.5 -142.4 1.6442 5.4 3.4 4U 1700-377
256.5781 -36.2973 10.7 34.1 -141.3 0.3059 1.1 10.2 GX 349+2
263.1731 -24.8037 7.4 21.8 -133.2 0.3090 1.6 9.6 GX 1+4
264.7995 -44.3069 9.2 37.5 -157.6 0.3408 1.3 8.9 4U 1735-44
268.3449 -1.4690 3.7 12.6 -49.3 0.6051 3.1 1.7 SW J1753.5-0127
270.2791 -25.0663 1.9 18.2 -148.9 1.2325 6.0 0.8 GX 5-1
270.4626 -25.7392 1589.2 18.7 -150.3 0.0014 0.0 8.7 GRS 1758-258
274.0224 -13.9663 3.1 6.9 -133.2 0.7259 3.7 4.3 GX 17+2
275.9685 -30.4089 6.5 21.8 -167.7 0.3463 1.8 3.4 H1820-303
284.9993 -24.9378 4.5 17.3 166.4 0.5553 2.6 2.2 HT1900.1-2455
288.8117 10.9617 1.5 22.1 33.3 1.7343 7.7 1.3 GRS 1915+105
299.6095 35.2008 1.6 48.2 29.0 5.2239 7.0 0.9 Cyg X-1
262.9465 -33.9069 2.5 29.0 -146.4 1.0561 4.5 4.8 GX 354-0
273.5688 4.0979 3.0 13.8 -15.8 0.7284 3.8 ------ UNKNOWN
259.2876 43.1582 2.1 54.8 -11.2 3.9608 5.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-24.032000 13.576000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8802 -15.7607 6.0 33.7 -99.3 -0.2839 -1.9 9.2 Sco X-1
254.5899 35.2775 10.9 49.6 -20.0 0.1725 1.1 7.6 Her X-1
255.9729 -37.7004 47.2 35.5 -142.2 -0.0246 -0.2 8.6 4U 1700-377
256.5963 -36.2994 0.0 34.1 -141.3 -0.0697 -0.7 10.7 GX 349+2
262.9850 -24.6871 6.7 21.9 -132.7 0.1358 1.7 3.7 GX 1+4
264.9016 -44.3131 0.0 37.5 -157.8 -0.1382 -1.4 10.7 4U 1735-44
268.2314 -1.6149 0.0 12.6 -50.1 -0.1373 -1.9 12.7 SW J1753.5-0127
270.1108 -24.9371 0.0 18.1 -148.3 -0.0642 -0.9 12.7 GX 5-1
270.4765 -25.8853 0.0 18.8 -150.5 -0.1851 -2.7 12.7 GRS 1758-258
274.1540 -13.9682 5.3 6.8 -134.0 -0.1598 -2.2 9.5 GX 17+2
275.8102 -30.2243 3.8 21.6 -167.3 0.2138 3.1 10.4 H1820-303
285.1914 -25.0163 6.2 17.4 165.9 -0.1380 -1.8 10.2 HT1900.1-2455
288.9229 11.1007 0.0 22.3 33.3 0.0549 0.7 11.8 GRS 1915+105
299.7477 35.0425 5.3 48.1 29.3 -0.6042 -2.2 12.3 Cyg X-1
262.9487 -33.8747 6.1 29.0 -146.3 -0.1608 -1.9 3.1 GX 354-0
294.0939 36.3576 0.7 47.4 22.9 3.5899 16.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
106.548600 962.498200
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3777 35.3962 6.9 32.0 -96.1 1.4037 1.7 5.1 Her X-1
268.3664 -1.5655 7.0 44.9 -158.4 1.5496 1.7 6.8 SW J1753.5-0127
273.9276 -13.9087 18.2 53.8 -171.9 0.9586 0.6 8.9 GX 17+2
288.7984 10.9415 0.8 25.9 175.6 7.2047 14.7 0.2 GRS 1915+105
299.5833 35.1793 0.5 4.6 87.1 9.2749 21.8 1.4 Cyg X-1
308.1438 40.9499 1.6 11.9 46.7 3.2354 7.0 1.5 Cyg X-3
326.0523 38.3824 6.6 25.3 59.4 1.0346 1.7 6.7 Cyg X-2
348.5901 52.3375 3.1 41.0 33.0 3.5636 3.7 ------ UNKNOWN
23.0655 72.4674 2.8 55.3 5.1 9.1259 4.0 ------ UNKNOWN
340.0968 70.1077 2.2 41.6 5.3 3.7802 5.1 ------ UNKNOWN
274.8096 17.9687 2.7 25.1 -148.5 2.0941 4.4 ------ UNKNOWN
248.0429 75.6101 3.8 44.5 -31.2 2.7016 3.1 ------ UNKNOWN
256.5340 34.8899 2.9 30.4 -97.8 2.5831 4.0 ------ UNKNOWN
220.1605 67.6812 4.8 50.7 -44.5 7.0642 2.4 ------ UNKNOWN
232.8930 56.1764 4.2 44.9 -60.1 6.5118 2.7 ------ UNKNOWN
250.0221 9.5927 3.0 48.0 -129.0 7.8074 3.8 ------ UNKNOWN
Plot creation:
Sat May 30 21:34:38 EDT 2015