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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
329.4683 38.9425 0.0238 37.5577 -19.3829 0.8498448 8.129 TRIG_00311159
Foreground time interval of the image:
19.068 73.301 (delta_t = 54.233 [sec])
Background time interval of the image:
-134.699 19.068 (delta_t = 153.767 [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 64.000000
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 64.000000
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 64.000000
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 19.068 sec. to 188.820 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.75394 ( -0.182115 0.187789 )
Norm@50keV : 8.28453E-04 ( -9.52265e-05 9.32488e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.99 using 59 PHA bins.
# Reduced chi-squared = 0.8420 for 57 degrees of freedom
# Null hypothesis probability = 7.964764e-01
Photon flux (15-150 keV) in 169.8 sec: 0.112184 ( -0.0109571 0.0109611 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.29773e-06 ( -1.53145e-07 1.56136e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 19.068 sec. to 188.820 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.75291 ( -0.672526 0.757728 )
Epeak [keV] : 9999.13 ( )
Norm@50keV : 8.29655E-04 ( -9.56953e-05 0.00117438 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.00 using 59 PHA bins.
# Reduced chi-squared = 0.8571 for 56 degrees of freedom
# Null hypothesis probability = 7.678808e-01
Photon flux (15-150 keV) in 169.8 sec: 0.112180 ( -0.010919 0.010923 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.29728e-06 ( -1.76938e-07 1.5464e-07 ) ergs/cm2
Band function
Time interval is from 19.068 sec. to 188.820 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.57585 ( -2.57584 -2.57584 )
beta : -1.79002 ( -0.229666 0.196903 )
Epeak [keV] : 21.2701 ( -21.2701 237.177 )
Norm@50keV : 3.34867 ( -3.34726 137.353 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.75 using 59 PHA bins.
# Reduced chi-squared = 0.8682 for 55 degrees of freedom
# Null hypothesis probability = 7.453720e-01
Photon flux (15-150 keV) in 169.8 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] : 11.1452 (-1.35794 1.58752)
R^2/D10^2 : 3.45387E-02 (-0.0134209 0.021472)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.62 using 59 PHA bins.
# Reduced chi-squared = 1.327 for 57 degrees of freedom
# Null hypothesis probability = 4.999659e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.526e-07 2.809e-08
25- 50 4.388e-07 5.824e-08
50-150 3.109e-07 7.700e-08
15-150 9.023e-07 1.133e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 108.039 (-35.5834 83.0282)
Norm : 0.486061 (-0.0623469 0.0741343)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.40 using 59 PHA bins.
# Reduced chi-squared = 0.8666 for 57 degrees of freedom
# Null hypothesis probability = 7.527381e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.156e-07 3.005e-08
25- 50 3.785e-07 4.610e-08
50-150 6.400e-07 2.651e-07
15-150 1.234e-06 3.204e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.63010 (-2.30118 2.7644)
R1^2/D10^2 : 0.175151 (-0.113762 0.603819)
kT2 [keV] : 26.7411 (-11.0171 -27.412)
R2^2/D10^2 : 1.06404E-03 (-0.000945253 0.00584667)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.71 using 59 PHA bins.
# Reduced chi-squared = 0.9220 for 55 degrees of freedom
# Null hypothesis probability = 6.391061e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.194e-07 9.588e-08
25- 50 3.701e-07 1.454e-07
50-150 6.971e-07 3.749e-07
15-150 1.287e-06 5.229e-07
Peak spectrum fit
Power-law model
Time interval is from 134.476 sec. to 135.476 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.80886 ( -0.654681 0.781919 )
Norm@50keV : 2.47943E-03 ( -0.00114964 0.00103648 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.03 using 59 PHA bins.
# Reduced chi-squared = 0.6847 for 57 degrees of freedom
# Null hypothesis probability = 9.669598e-01
Photon flux (15-150 keV) in 1 sec: 0.342840 ( -0.114232 0.114294 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.28189e-08 ( -9.7235e-09 1.06207e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 134.476 sec. to 135.476 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.81829 ( )
Epeak [keV] : 9999.35 ( )
Norm@50keV : 2.47043E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.03 using 59 PHA bins.
# Reduced chi-squared = 0.6969 for 56 degrees of freedom
# Null hypothesis probability = 9.588377e-01
Photon flux (15-150 keV) in 1 sec: 0.342106 ( -0.113826 0.114006 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.29024e-08 ( -1.05846e-08 1.03296e-08 ) ergs/cm2
Band function
Time interval is from 134.476 sec. to 135.476 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.46637 ( 1.46637 1.46637 )
beta : -1.80883 ( 1.80884 0.654466 )
Epeak [keV] : 13.9953 ( -13.9963 -13.9963 )
Norm@50keV : 6.28679E-03 ( -0.00628672 6648.43 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.03 using 59 PHA bins.
# Reduced chi-squared = 0.7096 for 55 degrees of freedom
# Null hypothesis probability = 9.491354e-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] : 8.92307 (-2.88999 5.07095)
R^2/D10^2 : 0.240852 (-0.24063 0.82606)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.61 using 59 PHA bins.
# Reduced chi-squared = 0.7300 for 57 degrees of freedom
# Null hypothesis probability = 9.372544e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.717e-09 2.256e-09
25- 50 7.795e-09 4.938e-09
50-150 2.896e-09 2.321e-09
15-150 1.441e-08 9.395e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 97.4641 (-97.5334 -97.5334)
Norm : 1.51454 (-0.575824 1.34453)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.52 using 59 PHA bins.
# Reduced chi-squared = 0.6934 for 57 degrees of freedom
# Null hypothesis probability = 9.623153e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.958e-09 2.394e-09
25- 50 6.808e-09 4.233e-09
50-150 1.087e-08 8.745e-09
15-150 2.164e-08 1.509e-08
Double BB
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.17 using 59 PHA bins.
#Fit statistic : Chi-Squared = 38.12 using 59 PHA bins.
#Fit statistic : Chi-Squared = 38.10 using 59 PHA bins.
#Fit statistic : Chi-Squared = 38.06 using 59 PHA bins.
# Reduced chi-squared = 0.7303 for 55 degrees of freedom
# Reduced chi-squared = 0.6931 for 55 degrees of freedom
# Reduced chi-squared = 0.6928 for 55 degrees of freedom
# Reduced chi-squared = 0.6919 for 55 degrees of freedom
# Null hypothesis probability = 9.333287e-01
# Null hypothesis probability = 9.595977e-01
# Null hypothesis probability = 9.598220e-01
# Null hypothesis probability = 9.602998e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.856e-09 1.879e-09
25- 50 7.227e-09 4.454e-09
50-150 4.420e-09 3.411e-09
15-150 1.550e-08 9.350e-09
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: 1.70818 ( -0.376285 0.400285 )
Norm@50keV : 8.32381E-04 ( -0.000202552 0.000195341 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.33 using 59 PHA bins.
# Reduced chi-squared = 1.006 for 57 degrees of freedom
# Null hypothesis probability = 4.626741e-01
Photon flux (15-150 keV) in 54.23 sec: 0.110867 ( -0.0236366 0.0236556 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.1768e-07 ( -1.03426e-07 1.06782e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.35071 ( -2.45887 0.935424 )
Epeak [keV] : 80.9720 ( -81.1114 -81.1681 )
Norm@50keV : 1.31509E-03 ( -0.00131171 0.0294599 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.22 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 56 degrees of freedom
# Null hypothesis probability = 4.297264e-01
Photon flux (15-150 keV) in 54.23 sec: 0.109350 ( -0.0251727 0.024598 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.02694e-07 ( -1.2189e-07 1.19092e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.10050 ( 1.10024 6.08218 )
beta : -2.04618 ( 2.01461 0.658919 )
Epeak [keV] : 62.0235 ( -60.127 121.406 )
Norm@50keV : 1.85052E-03 ( -0.00197343 114.54 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.02 using 59 PHA bins.
# Reduced chi-squared = 1.037 for 55 degrees of freedom
# Null hypothesis probability = 4.000275e-01
Photon flux (15-150 keV) in 54.23 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.00484e-07 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 3.59e-07
S(50-100 keV) = 4.26e-07
T90 vs. Hardness ratio plot
T90 = 152.199999988079 sec.
Hardness ratio (energy fluence ratio) = 1.18663
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.02358
Count Ratio (50-100 keV) / (15-25 keV) = 0.684977
Mask shadow pattern
IMX = 7.253459036448802E-01, IMY = 2.551906428780563E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
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:
-134.699400 19.068000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.5357 35.3556 6.6 37.8 85.7 0.7962 1.8 3.9 Her X-1
299.5909 35.2016 0.4 34.3 21.8 5.2225 28.4 0.0 Cyg X-1
308.1012 40.9598 4.0 30.0 7.2 0.4592 2.9 0.6 Cyg X-3
326.1496 38.3203 93.4 37.1 -15.1 0.0238 0.1 1.0 Cyg X-2
196.9199 42.0037 3.2 51.3 148.6 2.4599 3.7 ------ UNKNOWN
200.3035 47.9683 2.2 45.0 149.7 1.9320 5.1 ------ UNKNOWN
345.3588 24.2441 2.8 56.3 -28.7 3.3018 4.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
19.068000 73.300590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
254.4685 35.4021 6.1 37.8 85.8 -0.5559 -1.9 3.6 Her X-1
299.4850 35.1010 21.1 34.4 22.0 -0.0620 -0.5 7.9 Cyg X-1
307.9951 40.8275 7.1 30.1 7.5 -0.1579 -1.6 9.1 Cyg X-3
326.1352 38.1658 5.9 37.2 -14.9 0.2190 1.9 9.5 Cyg X-2
317.1369 17.5014 2.3 54.7 4.4 1.8245 4.9 ------ UNKNOWN
329.4684 38.9425 1.4 37.6 -19.4 0.8501 8.1 ------ UNKNOWN
344.6690 25.2718 2.0 55.1 -28.4 2.1605 5.9 ------ UNKNOWN
1.2886 47.0889 2.0 41.6 -57.7 1.1717 5.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
129.300600 543.105500
841.000000 903.053700
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
299.5910 35.1975 0.3 24.0 94.5 17.6210 44.5 0.2 Cyg X-1
308.1175 40.9075 2.6 16.4 107.7 1.3751 4.5 2.7 Cyg X-3
326.3671 38.1876 76.6 2.5 76.6 0.0496 0.2 12.2 Cyg X-2
260.4367 53.8677 2.5 47.7 136.2 6.1531 4.6 ------ UNKNOWN
307.6600 62.2980 2.6 26.8 161.7 1.6027 4.4 ------ UNKNOWN
329.4581 39.0433 2.1 0.1 -155.6 1.8660 5.3 ------ UNKNOWN
3.8828 40.5261 5.1 26.4 -100.2 0.9469 2.3 ------ UNKNOWN
38.7971 66.0090 3.5 46.7 -144.2 2.1990 3.3 ------ UNKNOWN
Plot creation:
Sun May 31 07:39:32 EDT 2015