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Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
271.7759 -22.2964 0.0408 16.2 115.7 1.5326 4.7 TRIG_00558631
------------------------------------------
Foreground time interval of the image:
0.000 78.200 (delta_t = 78.200 [sec])
80.000 119.810 (delta_t = 39.810 [sec])
121.000 320.000 (delta_t = 199.000 [sec])
Background time interval of the image:
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
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
The mask-weighted light curves based on cleaned DPHs
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
Multiple GTIs in the spectrum
tstart tstop
0.000000 78.200000
80.000000 119.810000
121.000000 320.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.16318 ( -0.632691 0.732496 )
Norm@50keV : 1.76919E-04 ( -8.18179e-05 7.88842e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.16 using 59 PHA bins.
# Reduced chi-squared = 0.9677 for 57 degrees of freedom
# Null hypothesis probability = 5.444088e-01
Photon flux (15-150 keV) in 317 sec: 2.87342E-02 ( -0.00917377 0.00917381 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.24727e-07 ( -2.00882e-07 2.21569e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 78.200000
80.000000 119.810000
121.000000 320.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.14461 ( )
Epeak [keV] : 28.5086 ( -28.2983 -28.2983 )
Norm@50keV : 0.175360 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.67 using 59 PHA bins.
# Reduced chi-squared = 0.9762 for 56 degrees of freedom
# Null hypothesis probability = 5.254475e-01
Photon flux (15-150 keV) in 317 sec: 2.87313E-02 ( -0.0091792 0.0091639 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.17579e-07 ( -2.87956e-07 2.2422e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 78.200000
80.000000 119.810000
121.000000 320.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.50731 ( -4.50731 -4.50731 )
beta : -2.85645 ( 2.85645 1.07089 )
Epeak [keV] : 25.5421 ( -8.81878 8.5657 )
Norm@50keV : 14.0819 ( -4.39029 492058 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.87 using 59 PHA bins.
# Reduced chi-squared = 0.9794 for 55 degrees of freedom
# Null hypothesis probability = 5.178653e-01
Photon flux (15-150 keV) in 317 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] : 7.28973 (-1.89636 2.69088)
R^2/D10^2 : 4.73406E-02 (-0.0473406 0.118405)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.69 using 59 PHA bins.
# Reduced chi-squared = 0.9595 for 57 degrees of freedom
# Null hypothesis probability = 5.620797e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.334e-07 7.946e-08
25- 50 1.973e-07 1.217e-07
50-150 3.778e-08 3.238e-08
15-150 3.685e-07 2.303e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 39.1436 (-21.5298 131.118)
Norm : 0.188253 (-0.0935243 0.205822)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.20 using 59 PHA bins.
# Reduced chi-squared = 0.9684 for 57 degrees of freedom
# Null hypothesis probability = 5.428943e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.360e-07 7.468e-08
25- 50 1.773e-07 1.103e-07
50-150 1.339e-07 1.117e-07
15-150 4.472e-07 2.727e-07
Double BB
R1^2/D10^2 : 3.36044E-06 ( )
kT2 [keV] : 6.65041 (-1.71914 2.34145)
R2^2/D10^2 : 6.49629E-02 (-0.0326346 0.0950224)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.66 using 59 PHA bins.
#Fit statistic : Chi-Squared = 51.02 using 59 PHA bins.
#Fit statistic : Chi-Squared = 50.94 using 59 PHA bins.
# Reduced chi-squared = 0.9938 for 55 degrees of freedom
# Reduced chi-squared = 0.9277 for 55 degrees of freedom
# Reduced chi-squared = 0.9261 for 55 degrees of freedom
# Null hypothesis probability = 4.875341e-01
# Null hypothesis probability = 6.272402e-01
# Null hypothesis probability = 6.306135e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.348e-07 8.347e-06
25- 50 1.949e-07 4.818e-05
50-150 4.862e-08 4.176e-04
15-150 3.783e-07 5.345e-04
Peak spectrum fit
Power-law model
Time interval is from 121.000 sec. to 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.16318 ( -0.632691 0.732496 )
Norm@50keV : 1.76919E-04 ( -8.18179e-05 7.88842e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.16 using 59 PHA bins.
# Reduced chi-squared = 0.9677 for 57 degrees of freedom
# Null hypothesis probability = 5.444088e-01
Photon flux (15-150 keV) in 317 sec: 2.87342E-02 ( -0.00917377 0.00917381 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.24727e-07 ( -2.00882e-07 2.21569e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 121.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.14461 ( )
Epeak [keV] : 28.5086 ( -28.2983 -28.2983 )
Norm@50keV : 0.175360 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.67 using 59 PHA bins.
# Reduced chi-squared = 0.9762 for 56 degrees of freedom
# Null hypothesis probability = 5.254475e-01
Photon flux (15-150 keV) in 317 sec: 2.87313E-02 ( -0.0091792 0.0091639 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.17579e-07 ( -2.87956e-07 2.2422e-07 ) ergs/cm2
Band function
Time interval is from 121.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.50731 ( -4.50731 -4.50731 )
beta : -2.85645 ( 2.85645 1.07089 )
Epeak [keV] : 25.5421 ( -8.81878 8.5657 )
Norm@50keV : 14.0819 ( -4.39029 492058 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.87 using 59 PHA bins.
# Reduced chi-squared = 0.9794 for 55 degrees of freedom
# Null hypothesis probability = 5.178653e-01
Photon flux (15-150 keV) in 317 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] : 7.28973 (-1.89636 2.69088)
R^2/D10^2 : 4.73406E-02 (-0.0473406 0.118405)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.69 using 59 PHA bins.
# Reduced chi-squared = 0.9595 for 57 degrees of freedom
# Null hypothesis probability = 5.620797e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.334e-07 8.353e-08
25- 50 1.973e-07 1.196e-07
50-150 3.778e-08 3.031e-08
15-150 3.685e-07 2.159e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 39.1436 (-21.5298 131.118)
Norm : 0.188253 (-0.0935243 0.205822)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.20 using 59 PHA bins.
# Reduced chi-squared = 0.9684 for 57 degrees of freedom
# Null hypothesis probability = 5.428943e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.360e-07 8.083e-08
25- 50 1.773e-07 1.124e-07
50-150 1.339e-07 1.039e-07
15-150 4.472e-07 2.726e-07
Double BB
R1^2/D10^2 : 3.36044E-06 ( )
kT2 [keV] : 6.65041 (-1.71914 2.34145)
R2^2/D10^2 : 6.49629E-02 (-0.0326346 0.0950224)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.66 using 59 PHA bins.
#Fit statistic : Chi-Squared = 51.02 using 59 PHA bins.
#Fit statistic : Chi-Squared = 50.94 using 59 PHA bins.
# Reduced chi-squared = 0.9938 for 55 degrees of freedom
# Reduced chi-squared = 0.9277 for 55 degrees of freedom
# Reduced chi-squared = 0.9261 for 55 degrees of freedom
# Null hypothesis probability = 4.875341e-01
# Null hypothesis probability = 6.272402e-01
# Null hypothesis probability = 6.306135e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.348e-07 8.332e-06
25- 50 1.949e-07 4.497e-05
50-150 4.862e-08 3.923e-04
15-150 3.783e-07 4.416e-04
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: 2.16318 ( -0.632691 0.732496 )
Norm@50keV : 1.76919E-04 ( -8.18179e-05 7.88842e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.16 using 59 PHA bins.
# Reduced chi-squared = 0.9677 for 57 degrees of freedom
# Null hypothesis probability = 5.444088e-01
Photon flux (15-150 keV) in 317 sec: 2.87342E-02 ( -0.00917377 0.00917381 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.24727e-07 ( -2.00882e-07 2.21569e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.14461 ( )
Epeak [keV] : 28.5086 ( -28.2983 -28.2983 )
Norm@50keV : 0.175360 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.67 using 59 PHA bins.
# Reduced chi-squared = 0.9762 for 56 degrees of freedom
# Null hypothesis probability = 5.254475e-01
Photon flux (15-150 keV) in 317 sec: 2.87313E-02 ( -0.0091792 0.0091639 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.17579e-07 ( -2.87956e-07 2.2422e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.50731 ( -4.50731 -4.50731 )
beta : -2.85645 ( 2.85645 1.07089 )
Epeak [keV] : 25.5421 ( -8.81878 8.5657 )
Norm@50keV : 14.0819 ( -4.39029 492058 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.87 using 59 PHA bins.
# Reduced chi-squared = 0.9794 for 55 degrees of freedom
# Null hypothesis probability = 5.178653e-01
Photon flux (15-150 keV) in 317 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) = 1.64836e-07
S(50-100 keV) = 1.47208e-07
T90 vs. Hardness ratio plot
T90 = 320 sec.
Hardness ratio (energy fluence ratio) = 0.893057
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.893149
Count Ratio (50-100 keV) / (15-25 keV) = 0.29388
Mask shadow pattern
IMX = -1.260836442214231E-01, IMY = -2.618418802227302E-01
TIME vs. PHA plot around the trigger time
TIME vs. DetID plot around the trigger time
100 us light curve (15-350 keV)
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:
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 78.200000
80.000000 119.810000
121.000000 320.000000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9835 -15.6411 0.4 18.2 -144.8 9.3826 28.2 0.2 Sco X-1
254.3827 35.3301 121.0 44.8 -40.6 0.0665 0.1 3.7 Her X-1
256.1820 -37.8601 4.6 29.5 158.5 1.0018 2.5 9.3 4U 1700-377
256.4725 -36.4112 5.7 28.1 158.7 0.7317 2.0 1.9 GX 349+2
262.7855 -24.7991 7.7 15.9 147.2 0.4722 1.5 12.6 GX 1+4
264.9705 -44.4499 20.0 35.7 145.4 0.3370 0.6 9.7 4U 1735-44
268.5210 -1.4848 5.3 9.6 8.8 0.6765 2.2 9.4 SW J1753.5-0127
270.2826 -25.0792 4.2 17.9 124.6 0.9299 2.7 0.1 GX 5-1
270.3481 -25.7668 55.5 18.5 125.4 0.0709 0.2 2.8 GRS 1758-258
274.0053 -14.0550 2.2 12.6 84.1 1.4934 5.2 1.1 GX 17+2
275.6904 -30.4292 0.0 24.9 120.4 -0.1680 -0.5 12.7 H1820-303
284.9733 -24.9287 9.1 26.9 98.1 -0.6220 -1.3 3.4 HT1900.1-2455
288.7808 10.9349 1.3 32.9 22.2 3.4600 8.9 1.2 GRS 1915+105
299.6675 35.1461 4.9 56.4 5.2 -3.8030 -2.4 5.0 Cyg X-1
263.1375 -33.7355 4.8 24.9 147.1 0.8840 2.4 9.5 GX 354-0
277.6683 7.9384 3.1 22.7 11.4 1.1029 3.7 ------ UNKNOWN
214.9812 -24.9579 3.1 47.8 -147.1 2.9221 3.8 ------ UNKNOWN
230.5561 -0.9558 4.5 32.6 -109.1 1.3844 2.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
460.900590 954.100610
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9816 -15.6411 0.4 26.2 123.7 15.0370 28.8 0.1 Sco X-1
255.9682 -37.7758 4.1 20.5 61.4 1.3576 2.8 4.2 4U 1700-377
256.3343 -36.4162 4.9 19.4 63.7 1.1062 2.3 4.9 GX 349+2
262.8281 -24.7322 11.5 8.5 95.7 0.3610 1.0 9.9 GX 1+4
264.6382 -44.3271 4.2 22.7 36.8 1.3024 2.8 8.6 4U 1735-44
268.2537 -1.5417 136.9 21.1 -166.3 0.0340 0.1 8.7 SW J1753.5-0127
270.2474 -25.1013 2.3 3.1 50.3 1.9801 5.1 2.4 GX 5-1
270.1913 -25.6654 2.9 3.6 46.9 1.8150 4.7 7.6 GRS 1758-258
273.9344 -13.9857 3.5 8.6 -142.4 1.3048 3.3 5.1 GX 17+2
275.9544 -30.3376 4.6 8.8 -0.8 1.0264 2.5 2.3 H1820-303
285.1453 -24.9895 8.6 12.5 -51.8 0.5509 1.3 7.2 HT1900.1-2455
288.7952 10.9256 1.1 37.2 -128.2 6.7758 10.1 1.2 GRS 1915+105
262.9364 -33.8859 4.3 13.9 55.6 1.0370 2.7 4.0 GX 354-0
235.8459 7.5266 2.7 46.2 149.8 5.5059 4.3 ------ UNKNOWN
239.8162 18.5924 3.0 51.5 163.6 6.5511 3.8 ------ UNKNOWN
323.3750 -63.0302 2.7 53.2 -2.9 4.8325 4.4 ------ UNKNOWN
309.6614 -29.4644 3.6 34.6 -46.6 1.7351 3.2 ------ UNKNOWN
266.2937 36.9574 4.7 59.6 -161.6 9.0481 2.5 ------ UNKNOWN
268.8631 36.3171 3.9 58.7 -159.2 9.6273 3.0 ------ UNKNOWN
328.2268 -30.5785 3.4 50.7 -44.5 9.0189 3.4 ------ UNKNOWN
Plot creation:
Thu Jun 20 17:27:24 EDT 2013