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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
230.0560 0.6218 0.0247 30.7640 -98.9325 1.5354404 7.821 TRIG_00563980
Foreground time interval of the image:
-9.832 103.400 (delta_t = 113.232 [sec])
Background time interval of the image:
-239.368 -9.832 (delta_t = 229.536 [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 8.192000
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 8.192000
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 8.192000
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 -9.832 sec. to 103.400 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.60299 ( -0.299385 0.303868 )
Norm@50keV : 9.23266E-04 ( -0.000147323 0.0001452 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.02 using 59 PHA bins.
# Reduced chi-squared = 0.9829 for 57 degrees of freedom
# Null hypothesis probability = 5.116970e-01
Photon flux (15-150 keV) in 113.2 sec: 0.118754 ( -0.0189952 0.0190817 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.77074e-07 ( -1.65992e-07 1.68289e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -9.832 sec. to 103.400 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.61558 ( -0.603992 0.292436 )
Epeak [keV] : 9999.35 ( -9999.36 -9999.36 )
Norm@50keV : 9.18506E-04 ( -0.000146129 0.00083812 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.04 using 59 PHA bins.
# Reduced chi-squared = 1.001 for 56 degrees of freedom
# Null hypothesis probability = 4.733010e-01
Photon flux (15-150 keV) in 113.2 sec: 0.119467 ( -0.0197172 0.018483 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.75141e-07 ( -1.63901e-07 1.70296e-07 ) ergs/cm2
Band function
Time interval is from -9.832 sec. to 103.400 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.25182 ( 1.25179 6.23808 )
beta : -1.60307 ( 1.60317 0.300153 )
Epeak [keV] : 34.3751 ( -34.6977 -34.6977 )
Norm@50keV : 1.95162E-03 ( -0.00102563 140570 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.02 using 59 PHA bins.
# Reduced chi-squared = 1.019 for 55 degrees of freedom
# Null hypothesis probability = 4.362349e-01
Photon flux (15-150 keV) in 113.2 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] : 14.1724 (-3.35726 4.62058)
R^2/D10^2 : 1.50188E-02 (-0.0148187 0.0248294)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.18 using 59 PHA bins.
# Reduced chi-squared = 1.319 for 57 degrees of freedom
# Null hypothesis probability = 5.364167e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.205e-08 2.264e-08
25- 50 2.712e-07 7.737e-08
50-150 3.609e-07 1.166e-07
15-150 7.042e-07 1.945e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-106.348 -199.363)
Norm : 0.475112 (-0.0728113 0.0922042)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.45 using 59 PHA bins.
# Reduced chi-squared = 1.008 for 57 degrees of freedom
# Null hypothesis probability = 4.584847e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.339e-07 7.562e-08
25- 50 2.576e-07 1.462e-07
50-150 5.650e-07 3.232e-07
15-150 9.566e-07 5.384e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.72407 (-2.00505 2.82059)
R1^2/D10^2 : 0.183641 (-0.130977 0.418132)
kT2 [keV] : 39.1123 (-16.6451 -39.1806)
R2^2/D10^2 : 4.28477E-04 (-0.000373237 0.00203444)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.78 using 59 PHA bins.
# Reduced chi-squared = 0.9961 for 55 degrees of freedom
# Null hypothesis probability = 4.828120e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.543e-07 8.677e-08
25- 50 2.488e-07 1.298e-07
50-150 6.389e-07 3.568e-07
15-150 1.042e-06 4.939e-07
Peak spectrum fit
Power-law model
Time interval is from 2.972 sec. to 3.972 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.15835 ( -0.787642 0.702017 )
Norm@50keV : 4.92765E-03 ( -0.00171275 0.00160687 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.29 using 59 PHA bins.
# Reduced chi-squared = 1.180 for 57 degrees of freedom
# Null hypothesis probability = 1.654217e-01
Photon flux (15-150 keV) in 1 sec: 0.575179 ( -0.203167 0.206067 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.0605e-08 ( -1.75156e-08 1.76639e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.972 sec. to 3.972 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.19831 ( -1.06169 0.666357 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 4.91767E-03 ( -0.00172779 0.011335 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.31 using 59 PHA bins.
# Reduced chi-squared = 1.202 for 56 degrees of freedom
# Null hypothesis probability = 1.431764e-01
Photon flux (15-150 keV) in 1 sec: 0.585280 ( -0.213651 0.197129 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.02741e-08 ( -1.70813e-08 1.73108e-08 ) ergs/cm2
Band function
Time interval is from 2.972 sec. to 3.972 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.951315 ( 0.951269 0.951269 )
beta : -1.15828 ( 1.15801 0.787937 )
Epeak [keV] : 45.5685 ( -45.5088 -45.5088 )
Norm@50keV : 8.64418E-03 ( -0.00529585 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.29 using 59 PHA bins.
# Reduced chi-squared = 1.223 for 55 degrees of freedom
# Null hypothesis probability = 1.237319e-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] : 29.2010 (-14.5904 48.328)
R^2/D10^2 : 7.74058E-03 (-0.00763647 0.0587946)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.81 using 59 PHA bins.
# Reduced chi-squared = 1.260 for 57 degrees of freedom
# Null hypothesis probability = 8.946970e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.050e-09 6.870e-10
25- 50 6.403e-09 4.069e-09
50-150 3.896e-08 2.402e-08
15-150 4.641e-08 2.952e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-119.842 -199.363)
Norm : 2.43606 (-0.806541 0.806541)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.90 using 59 PHA bins.
# Reduced chi-squared = 1.209 for 57 degrees of freedom
# Null hypothesis probability = 1.342704e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.066e-09 3.867e-09
25- 50 1.167e-08 7.035e-09
50-150 2.559e-08 1.609e-08
15-150 4.333e-08 2.673e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.77158 (-2.82771 5.65901)
R1^2/D10^2 : 1.54084 (-1.46319 33.9945)
kT2 [keV] : 52.5906 (-30.283 -52.5917)
R2^2/D10^2 : 1.45928E-03 (-0.00137538 0.00383328)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.43 using 59 PHA bins.
# Reduced chi-squared = 1.190 for 55 degrees of freedom
# Null hypothesis probability = 1.586172e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.860e-09 4.159e-09
25- 50 8.987e-09 5.095e-09
50-150 4.014e-08 2.302e-08
15-150 5.599e-08 2.866e-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: 1.60299 ( -0.299385 0.303868 )
Norm@50keV : 9.23266E-04 ( -0.000147323 0.0001452 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.02 using 59 PHA bins.
# Reduced chi-squared = 0.9829 for 57 degrees of freedom
# Null hypothesis probability = 5.116970e-01
Photon flux (15-150 keV) in 113.2 sec: 0.118754 ( -0.0189952 0.0190817 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.77074e-07 ( -1.65992e-07 1.68289e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.61558 ( -0.603992 0.292436 )
Epeak [keV] : 9999.35 ( -9999.36 -9999.36 )
Norm@50keV : 9.18506E-04 ( -0.000146129 0.00083812 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.04 using 59 PHA bins.
# Reduced chi-squared = 1.001 for 56 degrees of freedom
# Null hypothesis probability = 4.733010e-01
Photon flux (15-150 keV) in 113.2 sec: 0.119467 ( -0.0197172 0.018483 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.75141e-07 ( -1.63901e-07 1.70296e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.25182 ( 1.25179 6.23808 )
beta : -1.60307 ( 1.60317 0.300153 )
Epeak [keV] : 34.3751 ( -34.6977 -34.6977 )
Norm@50keV : 1.95162E-03 ( -0.00102563 140570 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.02 using 59 PHA bins.
# Reduced chi-squared = 1.019 for 55 degrees of freedom
# Null hypothesis probability = 4.362349e-01
Photon flux (15-150 keV) in 113.2 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) = 2.54e-07
S(50-100 keV) = 3.34e-07
T90 vs. Hardness ratio plot
T90 = 101.520000040531 sec.
Hardness ratio (energy fluence ratio) = 1.31496
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.01237
Count Ratio (50-100 keV) / (15-25 keV) = 0.765021
Mask shadow pattern
IMX = -9.242808461085956E-02, IMY = 5.880481593022540E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000
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:
-239.368000 -9.832000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9882 -15.6435 0.2 19.9 -145.6 11.3759 53.1 0.5 Sco X-1
254.4578 35.3425 413.1 38.8 -23.2 0.0078 0.0 0.0 Her X-1
256.0140 -37.8332 9.6 35.1 171.2 0.3186 1.2 1.5 4U 1700-377
256.4580 -36.4055 2.2 33.6 170.9 1.3636 5.3 1.5 GX 349+2
263.0539 -24.7547 2.4 21.9 158.9 0.9973 4.8 2.5 GX 1+4
264.9764 -44.3274 0.0 41.5 160.1 -1.0201 -2.5 12.4 4U 1735-44
268.2611 -1.2696 0.0 7.8 62.4 0.0947 0.5 12.7 SW J1753.5-0127
270.3495 -25.0713 1.7 24.0 142.7 1.7031 6.9 3.6 GX 5-1
270.3184 -25.7181 4.5 24.6 143.4 0.6399 2.6 1.7 GRS 1758-258
273.9744 -13.9686 3.8 17.2 115.4 0.6222 3.0 4.5 GX 17+2
276.0337 -30.5191 9.2 31.2 138.6 0.3743 1.3 10.7 H1820-303
285.0115 -25.0523 4.3 32.2 120.3 0.9526 2.7 8.0 HT1900.1-2455
288.7663 10.9436 1.2 31.3 48.0 2.9124 9.5 1.9 GRS 1915+105
299.5455 35.1749 11.9 52.8 25.0 1.0280 1.0 2.7 Cyg X-1
262.8209 -33.8424 6.1 30.9 161.3 0.4816 1.9 8.4 GX 354-0
225.7647 24.4819 3.2 43.6 -64.1 4.1474 3.6 ------ UNKNOWN
219.7413 1.7580 3.7 41.1 -99.1 3.9949 3.1 ------ UNKNOWN
217.6091 -6.7886 2.8 43.0 -111.9 4.4950 4.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-9.832000 103.400000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9008 -15.6344 2.9 20.0 -145.4 0.5235 4.0 4.6 Sco X-1
254.3643 35.4982 10.9 38.9 -23.3 -0.1798 -1.1 10.4 Her X-1
255.9143 -37.6735 4.9 35.0 171.3 0.3868 2.4 10.8 4U 1700-377
256.5182 -36.3488 9.0 33.6 170.8 -0.2060 -1.3 6.0 GX 349+2
263.1572 -24.6244 5.7 21.8 158.6 -0.2588 -2.0 10.9 GX 1+4
264.7255 -44.4018 5.9 41.6 160.4 0.4466 1.9 3.0 4U 1735-44
268.4750 -1.6355 0.0 8.0 65.3 0.1500 1.2 12.7 SW J1753.5-0127
270.2701 -24.9835 9.6 23.9 142.8 -0.1661 -1.2 5.8 GX 5-1
270.2734 -25.6660 5.8 24.5 143.5 -0.2845 -2.0 4.9 GRS 1758-258
273.8758 -14.1571 7.4 17.2 116.1 0.2031 1.6 10.5 GX 17+2
275.8867 -30.2214 6.3 30.8 138.5 0.3201 1.8 9.0 H1820-303
284.8881 -24.8590 11.2 32.0 120.1 0.2186 1.0 8.9 HT1900.1-2455
288.9087 11.0513 5.1 31.4 47.9 0.4328 2.3 9.1 GRS 1915+105
299.5098 35.3618 7.7 52.9 24.8 -0.9889 -1.5 10.4 Cyg X-1
262.7808 -33.9495 0.0 31.0 161.3 -0.3275 -2.2 12.5 GX 354-0
287.6641 -17.3816 2.5 30.2 105.2 0.9667 4.5 ------ UNKNOWN
286.8274 36.7721 2.2 46.6 13.9 1.4519 5.2 ------ UNKNOWN
237.3271 -23.0008 2.3 30.2 -148.7 0.6728 5.0 ------ UNKNOWN
230.0560 0.6218 1.5 30.8 -98.9 1.5349 7.8 ------ UNKNOWN
215.0280 -36.1822 2.3 53.5 -149.3 2.3735 5.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
518.932600 962.702300
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4390 35.3884 8.1 57.8 -177.7 -2.1910 -1.4 2.9 Her X-1
299.6246 35.1770 1.9 25.1 155.6 1.7978 6.1 2.2 Cyg X-1
308.0900 40.9566 0.9 16.9 164.9 3.0861 13.2 0.9 Cyg X-3
326.2711 38.4288 2.3 5.1 114.5 1.1720 4.9 7.9 Cyg X-2
353.4634 15.6596 2.3 33.0 28.4 1.6405 5.0 ------ UNKNOWN
312.8503 28.2875 2.6 20.1 123.4 1.1800 4.5 ------ UNKNOWN
257.0057 33.6614 3.2 56.9 179.2 5.9724 3.5 ------ UNKNOWN
39.9136 24.3719 2.9 58.9 -24.3 7.6391 3.9 ------ UNKNOWN
41.6120 42.6677 4.6 50.7 -44.5 3.5432 2.5 ------ UNKNOWN
Plot creation:
Sat May 30 16:05:49 EDT 2015