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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
216.6674 -7.5397 0.0483 11.5 -98.2 0.0113 4.0 TRIG_00652046
------------------------------------------
Foreground time interval of the image:
0.000 0.064 (delta_t = 0.064 [sec])
Background time interval of the image:
-60.220 -3.220 (delta_t = 57.000 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) 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.
- 5) 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.
- 6) 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 0.064000
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 0.064000
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 0.064000
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of 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.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.993876 ( -0.994578 1.45783 )
Norm@50keV : 4.16361E-03 ( -0.00416408 0.00315261 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.22 using 59 PHA bins.
# Reduced chi-squared = 1.109 for 57 degrees of freedom
# Null hypothesis probability = 2.661223e-01
Photon flux (15-150 keV) in 0.064 sec: 0.480490 ( -0.48049 0.38974 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.88806e-09 ( -2.09929e-09 2.14319e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -10.0000 ( )
Epeak [keV] : 66.9904 ( )
Norm@50keV : 69.7687 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.99 using 59 PHA bins.
# Reduced chi-squared = 1.089 for 56 degrees of freedom
# Null hypothesis probability = 3.011636e-01
Photon flux (15-150 keV) in 0.064 sec: 0.424137 0.423983 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.74479e-15 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -7.36907 -5 )
beta : -9.37165 ( 9.37167 9.37167 )
Epeak [keV] : 69.6056 ( -22.0377 36.0238 )
Norm@50keV : 1.18407 ( -1.16173 3.26884e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.90 using 59 PHA bins.
# Reduced chi-squared = 1.126 for 55 degrees of freedom
# Null hypothesis probability = 2.433739e-01
Photon flux (15-150 keV) in 0.064 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] : 20.1126 (-9.50298 149.042)
R^2/D10^2 : 2.54276E-02 (-0.0254276 0.157942)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.57 using 59 PHA bins.
# Reduced chi-squared = 1.098 for 57 degrees of freedom
# Null hypothesis probability = 2.852216e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.266e-10 9.958e-11
25- 50 6.331e-10 4.659e-10
50-150 1.900e-09 1.555e-09
15-150 2.660e-09 1.995e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.361 (-199.363 -199.363)
Norm : 2.09148 (-1.5855 1.58533)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.74 using 59 PHA bins.
# Reduced chi-squared = 1.118 for 57 degrees of freedom
# Null hypothesis probability = 2.513631e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.333e-10 2.723e-10
25- 50 6.412e-10 5.194e-10
50-150 1.406e-09 1.091e-09
15-150 2.381e-09 1.770e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.189485 (52.6398 -0.189485)
R1^2/D10^2 : 4129.74 (-4129.74 -4129.74)
kT2 [keV] : 20.1124 (-9.50273 149.067)
R2^2/D10^2 : 2.54286E-02 (-0.0249476 0.157947)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.57 using 59 PHA bins.
# Reduced chi-squared = 1.138 for 55 degrees of freedom
# Null hypothesis probability = 2.254801e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.993876 ( -0.994578 1.45783 )
Norm@50keV : 4.16361E-03 ( -0.00416408 0.00315261 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.22 using 59 PHA bins.
# Reduced chi-squared = 1.109 for 57 degrees of freedom
# Null hypothesis probability = 2.661223e-01
Photon flux (15-150 keV) in 0.064 sec: 0.480490 ( -0.48049 0.38974 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.88806e-09 ( -2.09929e-09 2.14319e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -10.0000 ( )
Epeak [keV] : 66.9904 ( )
Norm@50keV : 69.7687 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.99 using 59 PHA bins.
# Reduced chi-squared = 1.089 for 56 degrees of freedom
# Null hypothesis probability = 3.011636e-01
Photon flux (15-150 keV) in 0.064 sec: 0.424137 0.423983 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.74479e-15 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -7.36907 -5 )
beta : -9.37165 ( 9.37167 9.37167 )
Epeak [keV] : 69.6056 ( -22.0377 36.0238 )
Norm@50keV : 1.18407 ( -1.16173 3.26884e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.90 using 59 PHA bins.
# Reduced chi-squared = 1.126 for 55 degrees of freedom
# Null hypothesis probability = 2.433739e-01
Photon flux (15-150 keV) in 0.064 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] : 20.1126 (-9.50298 149.042)
R^2/D10^2 : 2.54276E-02 (-0.0254276 0.157942)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.57 using 59 PHA bins.
# Reduced chi-squared = 1.098 for 57 degrees of freedom
# Null hypothesis probability = 2.852216e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.266e-10 9.008e-11
25- 50 6.331e-10 4.394e-10
50-150 1.900e-09 1.478e-09
15-150 2.660e-09 1.905e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.361 (-199.363 -199.363)
Norm : 2.09148 (-1.5855 1.58533)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.74 using 59 PHA bins.
# Reduced chi-squared = 1.118 for 57 degrees of freedom
# Null hypothesis probability = 2.513631e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.333e-10 2.423e-10
25- 50 6.412e-10 4.765e-10
50-150 1.406e-09 1.114e-09
15-150 2.381e-09 1.736e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.189485 (52.6398 -0.189485)
R1^2/D10^2 : 4129.74 (-4129.74 -4129.74)
kT2 [keV] : 20.1124 (-9.50273 149.067)
R2^2/D10^2 : 2.54286E-02 (-0.0249476 0.157947)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.57 using 59 PHA bins.
# Reduced chi-squared = 1.138 for 55 degrees of freedom
# Null hypothesis probability = 2.254801e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
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: 0.993876 ( -0.994578 1.45783 )
Norm@50keV : 4.16361E-03 ( -0.00416408 0.00315261 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.22 using 59 PHA bins.
# Reduced chi-squared = 1.109 for 57 degrees of freedom
# Null hypothesis probability = 2.661223e-01
Photon flux (15-150 keV) in 0.064 sec: 0.480490 ( -0.48049 0.38974 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.88806e-09 ( -2.09929e-09 2.14319e-09 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -10.0000 ( )
Epeak [keV] : 66.9904 ( )
Norm@50keV : 69.7687 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.99 using 59 PHA bins.
# Reduced chi-squared = 1.089 for 56 degrees of freedom
# Null hypothesis probability = 3.011636e-01
Photon flux (15-150 keV) in 0.064 sec: 0.424137 0.423983 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.74479e-15 ( 0 0 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -7.36907 -5 )
beta : -9.37165 ( 9.37167 9.37167 )
Epeak [keV] : 69.6056 ( -22.0377 36.0238 )
Norm@50keV : 1.18407 ( -1.16173 3.26884e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.90 using 59 PHA bins.
# Reduced chi-squared = 1.126 for 55 degrees of freedom
# Null hypothesis probability = 2.433739e-01
Photon flux (15-150 keV) in 0.064 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) = 5.31e-10
S(50-100 keV) = 1.07e-09
T90 vs. Hardness ratio plot
T90 = 0.0639999508857727 sec.
Hardness ratio (energy fluence ratio) = 2.01507
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.33586
Count Ratio (50-100 keV) / (15-25 keV) = 15.197
Mask shadow pattern
IMX = -2.900206897099040E-02, IMY = 2.014842162736124E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000
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:
-60.220000 -3.220000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9844 -15.6477 0.7 17.7 98.4 1.5050 16.7 0.5 Sco X-1
254.5001 35.3422 16.1 50.9 12.7 -0.1725 -0.7 2.1 Her X-1
255.9690 -37.9110 3.8 38.2 128.4 0.6289 3.1 4.1 4U 1700-377
256.2292 -36.5622 0.0 37.4 126.5 -0.0677 -0.3 13.0 GX 349+2
262.9597 -24.7585 7.8 36.6 104.6 0.3142 1.5 2.8 GX 1+4
262.9582 -33.7135 5.2 40.3 117.8 0.6372 2.2 7.4 GX 354-0
224.8643 27.9770 2.8 37.2 -19.9 0.4286 4.2 ------ UNKNOWN
220.1007 37.0443 2.1 46.8 -24.0 0.7771 5.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 0.064000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9957 -15.5276 6.0 17.6 98.0 -0.0062 -1.9 6.8 Sco X-1
254.3787 35.4223 9.9 50.9 12.5 -0.0109 -1.2 6.2 Her X-1
255.9720 -37.8532 4.2 38.1 128.3 -0.0204 -2.8 0.9 4U 1700-377
256.3512 -36.3442 11.7 37.4 126.1 0.0071 1.0 6.2 GX 349+2
262.9847 -24.6884 4.9 36.6 104.5 0.0184 2.3 3.7 GX 1+4
262.9544 -33.8597 5.8 40.4 118.0 -0.0196 -2.0 2.3 GX 354-0
216.3861 -27.9214 2.6 21.9 -166.1 0.0127 4.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
41.680590 302.893000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9847 -15.6437 0.6 28.8 91.9 7.0847 20.7 0.4 Sco X-1
256.8412 -13.2777 2.6 39.9 84.7 3.9237 4.5 ------ UNKNOWN
244.3825 42.8783 2.7 56.4 7.2 5.5909 4.3 ------ UNKNOWN
182.2071 17.4514 2.5 42.2 -70.4 4.4680 4.7 ------ UNKNOWN
174.8107 -3.9509 3.0 41.8 -104.5 3.5272 3.8 ------ UNKNOWN
Plot creation:
Sun Aug 30 19:46:19 EDT 2015