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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
306.4795 -42.5890 0.0075 39.5253 -27.2991 3.0943002 25.561 TRIG_00111063
Foreground time interval of the image:
-55.980 14.149 (delta_t = 70.129 [sec])
Background time interval of the image:
-299.952 -55.980 (delta_t = 243.972 [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
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)
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 -55.980 sec. to 69.180 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.08518 ( -0.0837839 0.0852708 )
Norm@50keV : 2.72708E-03 ( -0.000132196 0.000131115 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.58 using 59 PHA bins.
# Reduced chi-squared = 0.8875 for 57 degrees of freedom
# Null hypothesis probability = 7.129094e-01
Photon flux (15-150 keV) in 125.2 sec: 0.425927 ( -0.0194933 0.0195715 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.16785e-06 ( -1.42518e-07 1.43025e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -55.980 sec. to 69.180 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.76608 ( -0.35654 0.170635 )
Epeak [keV] : 33.8723 ( -28.6734 13.1499 )
Norm@50keV : 4.02125E-03 ( -0.00101682 0.00214457 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.84 using 59 PHA bins.
# Reduced chi-squared = 0.8542 for 56 degrees of freedom
# Null hypothesis probability = 7.729770e-01
Photon flux (15-150 keV) in 125.2 sec: 0.416509 ( -0.021571 0.021645 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.07998e-06 ( -1.68494e-07 1.68619e-07 ) ergs/cm2
Band function
Time interval is from -55.980 sec. to 69.180 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.76608 ( -6.05995 0.120867 )
beta : -10.00000 ( 10 20 )
Epeak [keV] : 33.8668 ( -11.7029 12.6806 )
Norm@50keV : 4.02028E-03 ( -0.00112939 0.00103975 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.84 using 59 PHA bins.
# Reduced chi-squared = 0.8697 for 55 degrees of freedom
# Null hypothesis probability = 7.424520e-01
Photon flux (15-150 keV) in 125.2 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.08244e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.8701 ( )
R^2/D10^2 : 0.132975 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 168.98 using 59 PHA bins.
# Reduced chi-squared = 2.9646 for 57 degrees of freedom
# Null hypothesis probability = 5.035199e-13
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.100e-07 3.643e-08
25- 50 1.142e-06 5.966e-08
50-150 7.550e-07 8.019e-08
15-150 2.307e-06 1.052e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 65.8236 (-8.10165 9.90748)
Norm : 2.07562 (-0.160916 0.177283)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.98 using 59 PHA bins.
# Reduced chi-squared = 0.9119 for 57 degrees of freedom
# Null hypothesis probability = 6.635477e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.619e-07 4.225e-08
25- 50 1.035e-06 4.470e-08
50-150 1.269e-06 1.232e-07
15-150 2.966e-06 1.327e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.87247 (-0.885146 0.952461)
R1^2/D10^2 : 1.05337 (-0.443478 0.946431)
kT2 [keV] : 19.6091 (-2.84588 4.17855)
R2^2/D10^2 : 9.69120E-03 (-0.00527836 0.00918294)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.19 using 59 PHA bins.
# Reduced chi-squared = 0.9854 for 55 degrees of freedom
# Null hypothesis probability = 5.053668e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.762e-07 1.069e-07
25- 50 1.003e-06 1.042e-07
50-150 1.313e-06 2.282e-07
15-150 2.992e-06 3.875e-07
Peak spectrum fit
Power-law model
Time interval is from 24.604 sec. to 25.604 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.07889 ( -0.185986 0.195408 )
Norm@50keV : 1.21074E-02 ( -0.00158662 0.00155549 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.41 using 59 PHA bins.
# Reduced chi-squared = 0.9195 for 57 degrees of freedom
# Null hypothesis probability = 6.476844e-01
Photon flux (15-150 keV) in 1 sec: 1.88520 ( -0.207463 0.207687 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.12272e-07 ( -1.35385e-08 1.36825e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 24.604 sec. to 25.604 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.38721 ( -0.847929 0.472841 )
Epeak [keV] : 38.1340 ( )
Norm@50keV : 2.99777E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.57 using 59 PHA bins.
# Reduced chi-squared = 0.8851 for 56 degrees of freedom
# Null hypothesis probability = 7.154025e-01
Photon flux (15-150 keV) in 1 sec: 1.84882 ( -0.21082 0.21092 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.0704e-07 ( -1.42507e-08 1.4604e-08 ) ergs/cm2
Band function
Time interval is from 24.604 sec. to 25.604 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.38704 ( -0.466058 0.935824 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 38.1273 ( -18.7181 19.811 )
Norm@50keV : 2.99804E-02 ( -0.017193 0.0610361 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.57 using 59 PHA bins.
# Reduced chi-squared = 0.9012 for 55 degrees of freedom
# Null hypothesis probability = 6.815524e-01
Photon flux (15-150 keV) in 1 sec: 1.86274 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.08979e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.97182 (-1.29917 1.48337)
R^2/D10^2 : 0.881385 (-0.37011 0.644406)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.90 using 59 PHA bins.
# Reduced chi-squared = 1.226 for 57 degrees of freedom
# Null hypothesis probability = 1.172508e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.783e-08 3.600e-09
25- 50 4.416e-08 7.155e-09
50-150 2.286e-08 5.995e-09
15-150 8.485e-08 1.235e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 60.9090 (-15.5535 23.8271)
Norm : 9.86110 (-1.69239 1.97333)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.57 using 59 PHA bins.
# Reduced chi-squared = 0.8696 for 57 degrees of freedom
# Null hypothesis probability = 7.472519e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.484e-08 3.760e-09
25- 50 3.798e-08 4.270e-09
50-150 4.376e-08 1.108e-08
15-150 1.066e-07 1.507e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.41756 (-1.23539 1.52248)
R1^2/D10^2 : 6.76068 (-4.09186 7.5806)
kT2 [keV] : 18.2628 (-4.19044 7.01675)
R2^2/D10^2 : 5.87985E-02 (-0.0434799 0.118936)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.89 using 59 PHA bins.
# Reduced chi-squared = 0.8525 for 55 degrees of freedom
# Null hypothesis probability = 7.736714e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.633e-08 1.318e-08
25- 50 3.603e-08 1.219e-08
50-150 4.544e-08 2.506e-08
15-150 1.078e-07 3.948e-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: 1.83588 ( -0.100447 0.101868 )
Norm@50keV : 3.05277E-03 ( -0.000182542 0.000181446 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.54 using 59 PHA bins.
# Reduced chi-squared = 1.132 for 57 degrees of freedom
# Null hypothesis probability = 2.299004e-01
Photon flux (15-150 keV) in 70.13 sec: 0.426661 ( -0.0251275 0.0251932 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.96898e-06 ( -1.18538e-07 1.19041e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33965 ( -0.446896 0.404023 )
Epeak [keV] : 63.8298 ( -12.4223 64.8161 )
Norm@50keV : 5.52349E-03 ( -0.00207167 0.00380671 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.05 using 59 PHA bins.
# Reduced chi-squared = 1.072 for 56 degrees of freedom
# Null hypothesis probability = 3.313116e-01
Photon flux (15-150 keV) in 70.13 sec: 0.415238 ( -0.026678 0.026724 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.89669e-06 ( -1.32511e-07 1.32567e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.33962 ( -0.360729 0.408205 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 63.8174 ( -12.2277 64.7025 )
Norm@50keV : 5.52287E-03 ( -0.00207226 0.00381141 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.05 using 59 PHA bins.
# Reduced chi-squared = 1.092 for 55 degrees of freedom
# Null hypothesis probability = 2.979033e-01
Photon flux (15-150 keV) in 70.13 sec: 0.416280 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.90458e-06 ( -1.90409e-06 -1.30771e-07 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 9.76e-07
S(50-100 keV) = 9.20e-07
T90 vs. Hardness ratio plot
T90 = 95.4000000208616 sec.
Hardness ratio (energy fluence ratio) = 0.942623
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.0106
Count Ratio (50-100 keV) / (15-25 keV) = 0.52204
Mask shadow pattern
IMX = 7.331840132508618E-01, IMY = 3.784100713181509E-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:
-299.952000 -55.980000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9861 -15.6408 0.3 37.0 77.1 25.7064 35.1 0.4 Sco X-1
254.6098 35.5283 0.0 51.8 152.1 -0.2816 -0.2 13.4 Her X-1
255.8313 -37.7117 14.6 37.2 36.7 0.4115 0.8 10.8 4U 1700-377
256.3693 -36.4418 11.6 36.0 37.7 0.5440 1.0 3.4 GX 349+2
263.1728 -24.6342 20.8 23.9 48.3 -0.1509 -0.6 11.2 GX 1+4
264.9127 -44.4783 6.7 38.4 21.1 0.7155 1.7 7.5 4U 1735-44
268.4387 -1.3653 94.8 15.9 119.6 -0.0302 -0.1 6.7 SW J1753.5-0127
270.3171 -25.0384 2.3 19.6 35.3 1.1190 5.0 3.0 GX 5-1
270.2456 -25.7554 3.7 20.2 34.2 0.6832 3.1 3.2 GRS 1758-258
273.9828 -14.0479 1.9 9.5 59.5 1.3159 6.0 1.5 GX 17+2
275.9818 -30.4231 7.3 22.1 15.7 0.3465 1.6 4.5 H1820-303
285.1937 -24.8643 9.1 15.9 -8.5 0.3048 1.3 9.2 HT1900.1-2455
288.8091 10.9381 1.1 21.1 -161.3 2.9014 10.8 0.8 GRS 1915+105
299.5741 35.2058 0.7 47.3 -159.9 6.1998 17.3 0.8 Cyg X-1
308.0487 40.8764 154.3 55.4 -155.6 -0.0574 -0.1 5.4 Cyg X-3
262.9850 -33.7903 8.2 30.4 34.0 0.5330 1.4 2.7 GX 354-0
247.9955 -9.4895 3.5 33.9 87.5 2.2550 3.3 ------ UNKNOWN
244.6140 -43.7433 3.8 47.6 37.7 3.5651 3.0 ------ UNKNOWN
262.1110 37.4421 2.8 50.3 160.0 3.2087 4.2 ------ UNKNOWN
269.5407 -27.7046 2.6 22.1 32.4 1.0317 4.5 ------ UNKNOWN
273.7292 -12.0689 2.6 9.0 71.4 0.9605 4.6 ------ UNKNOWN
UNKNOWN
UNKNOWN
UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-55.980000 14.148590
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9293 -15.5905 5.1 37.1 77.2 -0.5947 -2.3 4.2 Sco X-1
254.4580 35.3418 2165.6 51.7 151.8 0.0019 0.0 0.0 Her X-1
256.1462 -37.9239 6.7 37.2 36.1 0.2761 1.7 8.9 4U 1700-377
256.4357 -36.4275 136.9 36.0 37.7 -0.0128 -0.1 0.3 GX 349+2
263.1731 -24.6274 13.2 23.9 48.4 0.0886 0.9 11.4 GX 1+4
264.9147 -44.4434 11.5 38.4 21.1 0.1363 1.0 7.4 4U 1735-44
268.2562 -1.3150 279.9 16.1 119.4 0.0036 0.0 10.6 SW J1753.5-0127
270.1246 -25.0937 4.5 19.7 35.6 0.2308 2.5 8.7 GX 5-1
270.4360 -25.8999 6.0 20.2 33.5 0.1732 1.9 11.9 GRS 1758-258
273.9860 -14.1603 8.5 9.6 58.9 0.1132 1.4 7.5 GX 17+2
275.9355 -30.2181 8.6 21.9 16.0 0.1147 1.3 9.0 H1820-303
284.8796 -24.9444 6.5 15.9 -7.4 -0.1578 -1.8 8.6 HT1900.1-2455
288.7714 11.0394 4.8 21.2 -161.4 0.2183 2.4 5.8 GRS 1915+105
299.7417 35.0338 0.0 47.2 -159.6 -0.1835 -1.1 12.5 Cyg X-1
307.9973 40.8345 2143.9 55.3 -155.6 -0.0015 -0.0 8.7 Cyg X-3
263.1028 -33.9695 4.0 30.4 33.6 -0.3497 -2.9 9.9 GX 354-0
300.1209 17.1732 2.2 31.7 -145.4 0.5023 5.1 ------ UNKNOWN
306.4795 -42.5890 0.5 39.5 -27.3 3.0946 25.6 ------ UNKNOWN
315.2482 37.9521 2.1 56.3 -148.1 2.8219 5.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
73.348600 302.085400
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
255.8566 -37.7220 6.6 38.4 108.6 -0.8875 -1.8 9.6 4U 1700-377
256.4360 -36.4236 207.2 38.5 110.8 0.0274 0.1 0.0 GX 349+2
263.0038 -24.7485 15.5 39.8 131.3 0.3046 0.7 0.3 GX 1+4
264.7809 -44.4791 37.1 29.9 100.8 0.0954 0.3 2.4 4U 1735-44
268.2686 -1.4597 6.4 53.4 158.5 1.4283 1.8 6.0 SW J1753.5-0127
270.2704 -25.1177 2.9 34.4 137.7 1.0278 4.0 2.4 GX 5-1
270.3427 -25.7244 2.9 34.0 136.9 0.9543 4.0 2.4 GRS 1758-258
273.8935 -14.1659 20.9 39.9 154.4 0.1809 0.6 10.2 GX 17+2
275.8404 -30.4005 6.5 27.3 135.3 0.3823 1.8 4.8 H1820-303
285.2090 -24.9737 15.1 24.8 157.3 0.1446 0.8 9.9 HT1900.1-2455
288.8157 10.9969 3.2 56.0 -172.2 2.1301 3.6 3.2 GRS 1915+105
263.0908 -33.6953 4.1 34.8 118.9 0.9416 2.8 9.8 GX 354-0
257.5691 -50.8736 3.6 33.8 87.4 1.3043 3.3 ------ UNKNOWN
280.4002 -1.9960 2.5 46.8 171.8 1.4466 4.5 ------ UNKNOWN
346.4022 -19.1351 3.5 41.0 -83.5 2.5272 3.4 ------ UNKNOWN
Plot creation:
Sun May 31 17:22:21 EDT 2015