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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
308.2119 74.8241 0.0051 26.9831 -48.9506 2.5581725 37.860 TRIG_00455155
Foreground time interval of the image:
-11.088 13.029 (delta_t = 24.117 [sec])
Background time interval of the image:
-239.072 -11.088 (delta_t = 227.984 [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)
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 -11.088 sec. to 59.404 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48592 ( -0.0486964 0.0486975 )
Norm@50keV : 7.25004E-03 ( -0.00018426 0.000184251 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 91.12 using 59 PHA bins.
# Reduced chi-squared = 1.599 for 57 degrees of freedom
# Null hypothesis probability = 2.748438e-03
Photon flux (15-150 keV) in 70.49 sec: 0.901705 ( -0.0252836 0.0253557 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.85948e-06 ( -1.30968e-07 1.3118e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -11.088 sec. to 59.404 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.34100 ( -0.19808 0.164052 )
Epeak [keV] : 246.744 ( -111.266 -246.75 )
Norm@50keV : 8.46203E-03 ( -0.00130532 0.00193406 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 89.44 using 59 PHA bins.
# Reduced chi-squared = 1.597 for 56 degrees of freedom
# Null hypothesis probability = 3.005789e-03
Photon flux (15-150 keV) in 70.49 sec: 0.892021 ( -0.028001 0.028096 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.81099e-06 ( -1.47409e-07 1.46647e-07 ) ergs/cm2
Band function
Time interval is from -11.088 sec. to 59.404 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.919238 ( -0.411139 0.918799 )
beta : -1.58160 ( -0.118378 0.107038 )
Epeak [keV] : 79.6095 ( -49.2609 99.198 )
Norm@50keV : 1.48001E-02 ( -0.00639891 0.111411 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 85.79 using 59 PHA bins.
# Reduced chi-squared = 1.560 for 55 degrees of freedom
# Null hypothesis probability = 4.961307e-03
Photon flux (15-150 keV) in 70.49 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] : 16.4093 ( )
R^2/D10^2 : 7.22394E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 397.58 using 59 PHA bins.
# Reduced chi-squared = 6.9752 for 57 degrees of freedom
# Null hypothesis probability = 1.504343e-52
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.818e-07 1.456e-08
25- 50 1.212e-06 4.124e-08
50-150 2.301e-06 1.163e-07
15-150 3.795e-06 1.117e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 3.70510 (-0.0942285 0.0942264)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 101.26 using 59 PHA bins.
# Reduced chi-squared = 1.7766 for 57 degrees of freedom
# Null hypothesis probability = 2.788125e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.504e-07 1.783e-08
25- 50 1.251e-06 3.454e-08
50-150 2.744e-06 7.965e-08
15-150 4.645e-06 1.357e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.74173 (-0.827709 0.844274)
R1^2/D10^2 : 0.445772 (-0.110435 0.165122)
kT2 [keV] : 34.2837 (-4.53516 6.66443)
R2^2/D10^2 : 4.44344E-03 (-0.00192181 0.00278813)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 95.00 using 59 PHA bins.
# Reduced chi-squared = 1.727 for 55 degrees of freedom
# Null hypothesis probability = 6.555728e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.130e-07 4.162e-08
25- 50 1.277e-06 7.014e-08
50-150 2.997e-06 3.274e-07
15-150 4.788e-06 4.039e-07
Peak spectrum fit
Power-law model
Time interval is from 34.424 sec. to 35.424 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23680 ( -0.0920101 0.0918562 )
Norm@50keV : 3.35766E-02 ( -0.0017364 0.00173597 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.52 using 59 PHA bins.
# Reduced chi-squared = 0.7810 for 57 degrees of freedom
# Null hypothesis probability = 8.855883e-01
Photon flux (15-150 keV) in 1 sec: 3.96284 ( -0.209841 0.210081 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.37214e-07 ( -1.96446e-08 1.97549e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 34.424 sec. to 35.424 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.15671 ( -0.359356 0.0928419 )
Epeak [keV] : 527.653 ( -935.106 -935.106 )
Norm@50keV : 3.66415E-02 ( -0.00320801 0.016062 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.57 using 59 PHA bins.
# Reduced chi-squared = 0.7959 for 56 degrees of freedom
# Null hypothesis probability = 8.642567e-01
Photon flux (15-150 keV) in 1 sec: 3.95496 ( -0.2168 0.21469 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.36344e-07 ( -1.0351e-08 2.0477e-08 ) ergs/cm2
Band function
Time interval is from 34.424 sec. to 35.424 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.626719 ( 0.728288 0.728288 )
beta : -1.26314 ( 1.26278 0.111729 )
Epeak [keV] : 66.6579 ( -66.0347 526.659 )
Norm@50keV : 8.69046E-02 ( -0.0580416 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.15 using 59 PHA bins.
# Reduced chi-squared = 0.8028 for 55 degrees of freedom
# Null hypothesis probability = 8.523067e-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] : 18.3420 ( )
R^2/D10^2 : 0.238536 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 131.49 using 59 PHA bins.
# Reduced chi-squared = 2.3069 for 57 degrees of freedom
# Null hypothesis probability = 8.078775e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.597e-08 1.690e-09
25- 50 7.489e-08 5.725e-09
50-150 1.837e-07 1.835e-08
15-150 2.746e-07 1.770e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 16.3221 (-0.857366 0.857275)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.95 using 59 PHA bins.
# Reduced chi-squared = 1.367 for 57 degrees of freedom
# Null hypothesis probability = 3.411235e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.065e-08 2.305e-09
25- 50 7.820e-08 4.830e-09
50-150 1.715e-07 3.080e-08
15-150 2.904e-07 3.850e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.01459 (-1.54491 1.79209)
R1^2/D10^2 : 2.28689 (-1.03044 2.28274)
kT2 [keV] : 34.0819 (-6.3987 12.4274)
R2^2/D10^2 : 2.62693E-02 (-0.015948 0.0260909)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.04 using 59 PHA bins.
# Reduced chi-squared = 0.8552 for 55 degrees of freedom
# Null hypothesis probability = 7.688432e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.100e-08 7.850e-09
25- 50 7.519e-08 1.315e-08
50-150 2.323e-07 5.110e-08
15-150 3.385e-07 7.220e-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: 1.41614 ( -0.0742916 0.0742715 )
Norm@50keV : 7.33304E-03 ( -0.000308481 0.000308344 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 107.38 using 59 PHA bins.
# Reduced chi-squared = 1.8839 for 57 degrees of freedom
# Null hypothesis probability = 6.204113e-05
Photon flux (15-150 keV) in 24.12 sec: 0.896354 ( -0.0392169 0.0392771 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.70353e-06 ( -7.81823e-08 7.84344e-08 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00389 ( -0.326873 0.303028 )
Epeak [keV] : 125.313 ( -34.1147 185.933 )
Norm@50keV : 1.16514E-02 ( -0.00329114 0.00502929 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 101.86 using 59 PHA bins.
# Reduced chi-squared = 1.8190 for 56 degrees of freedom
# Null hypothesis probability = 1.749319e-04
Photon flux (15-150 keV) in 24.12 sec: 0.877349 ( -0.041492 0.041511 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.65371e-06 ( -8.76159e-08 8.71311e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.404242 ( -0.602626 1.1062 )
beta : -1.65965 ( -0.217471 0.165153 )
Epeak [keV] : 67.0854 ( -24.8765 45.8723 )
Norm@50keV : 2.62451E-02 ( -0.0146051 0.127766 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 97.59 using 59 PHA bins.
# Reduced chi-squared = 1.774 for 55 degrees of freedom
# Null hypothesis probability = 3.567051e-04
Photon flux (15-150 keV) in 24.12 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) = 1.19e-06
S(50-100 keV) = 1.70e-06
T90 vs. Hardness ratio plot
T90 = 49.4439999461174 sec.
Hardness ratio (energy fluence ratio) = 1.42857
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.43938
Count Ratio (50-100 keV) / (15-25 keV) = 1.05568
Mask shadow pattern
IMX = 3.343658566502133E-01, IMY = 3.839754157925001E-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:
-239.072000 -11.088000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.3070 35.2923 47.5 22.4 95.5 -0.0622 -0.2 8.0 Her X-1
299.5972 35.2092 0.6 39.0 25.8 6.1688 18.6 0.6 Cyg X-1
308.1491 40.9499 1.8 39.3 11.8 1.9879 6.5 1.8 Cyg X-3
326.2601 38.1824 5.7 50.9 0.2 -1.0282 -2.1 9.3 Cyg X-2
237.4343 40.0315 2.6 19.7 134.9 0.9367 4.4 ------ UNKNOWN
208.8072 40.5639 2.6 31.8 178.4 1.0229 4.4 ------ UNKNOWN
296.9892 67.9050 3.2 22.7 -33.5 0.6592 3.5 ------ UNKNOWN
164.0602 40.5818 5.7 55.3 -145.2 3.1677 2.1 ------ UNKNOWN
6.1947 61.7445 3.2 50.5 -44.1 3.4901 3.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-11.088000 13.028590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.5365 35.5049 7.2 22.2 94.9 -0.1259 -1.6 10.5 Her X-1
299.5843 35.0729 3.5 39.1 26.0 0.3542 3.3 7.7 Cyg X-1
308.1552 40.7979 6.1 39.4 12.0 0.1834 1.9 9.5 Cyg X-3
326.1096 38.2343 18.3 50.8 0.3 -0.0996 -0.6 6.0 Cyg X-2
266.4364 36.5644 2.1 23.3 69.9 0.4359 5.6 ------ UNKNOWN
327.6130 33.4085 2.6 55.2 3.0 1.3007 4.4 ------ UNKNOWN
188.7234 24.6088 2.4 54.8 -177.1 0.9534 4.7 ------ UNKNOWN
308.2119 74.8241 0.3 27.0 -49.0 2.5582 37.9 ------ UNKNOWN
178.0394 42.3576 2.3 46.9 -153.6 0.6131 5.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
61.028600 963.059500
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.5749 35.1955 0.8 39.8 55.1 28.9901 15.1 0.8 Cyg X-1
308.1211 40.9673 2.7 33.8 44.2 4.5413 4.2 1.0 Cyg X-3
326.3748 38.3023 4.6 37.5 20.4 2.1718 2.5 9.6 Cyg X-2
250.8405 47.4322 3.6 36.2 118.5 4.9678 3.2 ------ UNKNOWN
245.7676 47.5954 3.2 37.4 123.9 5.8919 3.5 ------ UNKNOWN
181.6213 46.1575 3.2 54.0 -179.3 7.7871 3.6 ------ UNKNOWN
61.6713 73.5495 3.5 26.4 -100.0 2.5678 3.3 ------ UNKNOWN
140.0357 49.6216 5.6 55.3 -145.1 10.5139 2.2 ------ UNKNOWN
139.6793 49.7581 9.8 55.2 -144.9 6.5537 1.4 ------ UNKNOWN
27.4165 39.8278 2.7 49.0 -48.1 13.6674 4.2 ------ UNKNOWN
Plot creation:
Sat May 30 22:11:14 EDT 2015