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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
181.0423 -32.7623 0.0076 37.6305 -91.2288 5.0286099 25.277 TRIG_00534015
Foreground time interval of the image:
-2.860 23.916 (delta_t = 26.776 [sec])
Background time interval of the image:
-239.288 -2.860 (delta_t = 236.428 [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)
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 -2.860 sec. to 23.916 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.59755 ( -0.0912048 0.0918006 )
Norm@50keV : 1.23415E-02 ( -0.000665764 0.000664469 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.76 using 59 PHA bins.
# Reduced chi-squared = 1.101 for 57 degrees of freedom
# Null hypothesis probability = 2.795382e-01
Photon flux (15-150 keV) in 26.78 sec: 1.58474 ( -0.0879658 0.0881452 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.09186e-06 ( -1.76565e-07 1.77155e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.860 sec. to 23.916 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00182 ( -0.409768 0.374442 )
Epeak [keV] : 85.9200 ( -16.7641 57.3206 )
Norm@50keV : 2.42761E-02 ( -0.00823624 0.01392 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.01 using 59 PHA bins.
# Reduced chi-squared = 0.9823 for 56 degrees of freedom
# Null hypothesis probability = 5.124232e-01
Photon flux (15-150 keV) in 26.78 sec: 1.53810 ( -0.09235 0.09247 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.98158e-06 ( -1.91316e-07 1.91182e-07 ) ergs/cm2
Band function
Time interval is from -2.860 sec. to 23.916 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.00177 ( -0.337744 0.461566 )
beta : -10.0000 ( 10 7.10543e-15 )
Epeak [keV] : 85.9031 ( -14.5218 57.2829 )
Norm@50keV : 2.42755E-02 ( -0.00823106 0.0139303 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.01 using 59 PHA bins.
# Reduced chi-squared = 1.000 for 55 degrees of freedom
# Null hypothesis probability = 4.743233e-01
Photon flux (15-150 keV) in 26.78 sec: 1.53962 ( 5.46038 -0.09332 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.98929e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.8622 ( )
R^2/D10^2 : 0.182240 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 118.45 using 59 PHA bins.
# Reduced chi-squared = 2.0781 for 57 degrees of freedom
# Null hypothesis probability = 3.343761e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.260e-07 2.240e-08
25- 50 8.904e-07 6.641e-08
50-150 1.333e-06 1.446e-07
15-150 2.449e-06 1.453e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 177.897 (-40.948 -177.527)
Norm : 6.48053 (-0.378801 0.413198)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.35 using 59 PHA bins.
# Reduced chi-squared = 0.9886 for 57 degrees of freedom
# Null hypothesis probability = 4.994346e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.382e-07 3.441e-08
25- 50 8.314e-07 1.086e-07
50-150 1.753e-06 6.651e-07
15-150 3.023e-06 7.755e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.17336 (-1.47049 1.59063)
R1^2/D10^2 : 1.42808 (-0.664532 1.69559)
kT2 [keV] : 23.7408 (-3.6332 5.82279)
R2^2/D10^2 : 2.61616E-02 (-0.0150505 0.0249795)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.07 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 55 degrees of freedom
# Null hypothesis probability = 4.343550e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.945e-07 8.046e-08
25- 50 8.541e-07 1.482e-07
50-150 1.719e-06 4.211e-07
15-150 2.967e-06 6.206e-07
Peak spectrum fit
Power-law model
Time interval is from -0.284 sec. to 0.716 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.36179 ( -0.169487 0.170043 )
Norm@50keV : 3.71907E-02 ( -0.00390636 0.0039022 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.06 using 59 PHA bins.
# Reduced chi-squared = 1.264 for 57 degrees of freedom
# Null hypothesis probability = 8.632037e-02
Photon flux (15-150 keV) in 1 sec: 4.49142 ( -0.485758 0.486723 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.62283e-07 ( -4.11464e-08 4.13425e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.284 sec. to 0.716 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.524525 ( -0.875136 0.726441 )
Epeak [keV] : 95.5322 ( -25.0691 226.555 )
Norm@50keV : 9.27822E-02 ( -0.0500116 0.140619 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.12 using 59 PHA bins.
# Reduced chi-squared = 1.216 for 56 degrees of freedom
# Null hypothesis probability = 1.284571e-01
Photon flux (15-150 keV) in 1 sec: 4.36724 ( -0.49972 0.49955 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.50901e-07 ( -4.3476e-08 4.3312e-08 ) ergs/cm2
Band function
Time interval is from -0.284 sec. to 0.716 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.524469 ( -0.468473 0.866265 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 95.5151 ( -35.6672 201.18 )
Norm@50keV : 9.27880E-02 ( -0.0500415 0.140731 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.12 using 59 PHA bins.
# Reduced chi-squared = 1.239 for 55 degrees of freedom
# Null hypothesis probability = 1.101263e-01
Photon flux (15-150 keV) in 1 sec: 4.40119 ( ) 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] : 17.2216 (-2.0112 2.32462)
R^2/D10^2 : 0.341564 (-0.121072 0.181606)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.07 using 59 PHA bins.
# Reduced chi-squared = 1.387 for 57 degrees of freedom
# Null hypothesis probability = 2.817800e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.056e-08 4.480e-09
25- 50 9.189e-08 1.242e-08
50-150 1.954e-07 3.680e-08
15-150 3.078e-07 4.340e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 18.7678 (-1.97126 1.97115)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.75 using 59 PHA bins.
# Reduced chi-squared = 1.294 for 57 degrees of freedom
# Null hypothesis probability = 6.707911e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.673e-08 6.015e-09
25- 50 8.989e-08 3.560e-08
50-150 1.971e-07 1.027e-07
15-150 3.338e-07 1.732e-07
Double BB
R1^2/D10^2 : 1.41505 ( )
kT2 [keV] : 27.8384 (-10.2794 50.0883)
R2^2/D10^2 : 4.69951E-02 (-0.0451066 0.263867)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.64 using 59 PHA bins.
#Fit statistic : Chi-Squared = 68.82 using 59 PHA bins.
#Fit statistic : Chi-Squared = 68.80 using 59 PHA bins.
# Reduced chi-squared = 1.284 for 55 degrees of freedom
# Reduced chi-squared = 1.251 for 55 degrees of freedom
# Reduced chi-squared = 1.251 for 55 degrees of freedom
# Null hypothesis probability = 7.606907e-02
# Null hypothesis probability = 9.968895e-02
# Null hypothesis probability = 9.992245e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.655e-08 1.466e-08
25- 50 8.216e-08 1.802e-08
50-150 2.138e-07 4.990e-08
15-150 3.326e-07 6.510e-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: 1.59755 ( -0.0912048 0.0918006 )
Norm@50keV : 1.23415E-02 ( -0.000665764 0.000664469 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.76 using 59 PHA bins.
# Reduced chi-squared = 1.101 for 57 degrees of freedom
# Null hypothesis probability = 2.795382e-01
Photon flux (15-150 keV) in 26.78 sec: 1.58474 ( -0.0879658 0.0881452 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.09186e-06 ( -1.76565e-07 1.77155e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00182 ( -0.409768 0.374442 )
Epeak [keV] : 85.9200 ( -16.7641 57.3206 )
Norm@50keV : 2.42761E-02 ( -0.00823624 0.01392 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.01 using 59 PHA bins.
# Reduced chi-squared = 0.9823 for 56 degrees of freedom
# Null hypothesis probability = 5.124232e-01
Photon flux (15-150 keV) in 26.78 sec: 1.53810 ( -0.09235 0.09247 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.98158e-06 ( -1.91316e-07 1.91182e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.00177 ( -0.337744 0.461566 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 85.9031 ( -14.5218 57.2829 )
Norm@50keV : 2.42755E-02 ( -0.00823106 0.0139303 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.01 using 59 PHA bins.
# Reduced chi-squared = 1.000 for 55 degrees of freedom
# Null hypothesis probability = 4.743233e-01
Photon flux (15-150 keV) in 26.78 sec: 1.53962 ( 5.46038 -0.09332 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.98929e-06 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 8.01e-07
S(50-100 keV) = 1.06e-06
T90 vs. Hardness ratio plot
T90 = 25.095999956131 sec.
Hardness ratio (energy fluence ratio) = 1.32335
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.44663
Count Ratio (50-100 keV) / (15-25 keV) = 1.09278
Mask shadow pattern
IMX = -1.653280851973350E-02, IMY = 7.707761230919873E-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:
-239.288000 -2.860000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.5876 -40.5466 4.4 51.1 -141.6 2.8354 2.6 2.7 Vela X-1
170.0159 -60.5637 8.6 22.1 -142.7 0.2947 1.3 9.5 Cen X-3
186.6944 -62.7753 1.3 13.9 -140.8 1.9511 9.0 1.1 GX 301-2
244.9788 -15.6360 1.2 50.9 -1.4 5.0796 9.3 0.3 Sco X-1
256.1448 -37.8588 365.6 34.1 25.3 -0.0095 -0.0 7.5 4U 1700-377
256.4903 -36.5133 4.1 35.4 24.5 0.8533 2.8 6.0 GX 349+2
263.1407 -24.8172 6.3 48.4 23.8 -1.3197 -1.8 8.4 GX 1+4
264.9595 -44.5952 6.8 32.4 42.2 0.5073 1.7 12.7 4U 1735-44
270.2796 -24.9406 4.8 51.3 31.4 -2.7337 -2.4 8.3 GX 5-1
270.4499 -25.7937 12.3 50.6 32.1 1.0133 0.9 8.5 GRS 1758-258
263.1255 -33.9906 501.5 40.3 30.0 0.0094 0.0 11.6 GX 354-0
292.3724 -50.5981 2.6 40.4 72.3 3.9325 4.5 ------ UNKNOWN
266.3020 -26.3842 1.2 48.3 28.2 7.2315 9.7 ------ UNKNOWN
43.0478 -74.2108 2.3 43.1 145.7 2.5350 5.0 ------ UNKNOWN
75.8079 -71.1585 3.3 43.6 160.4 1.5710 3.6 ------ UNKNOWN
256.7743 -32.5251 2.3 39.0 21.6 1.7811 5.0 ------ UNKNOWN
254.1125 -73.8043 2.2 17.1 108.9 1.1665 5.2 ------ UNKNOWN
248.5211 -47.4085 0.9 23.1 26.7 2.6260 12.6 ------ UNKNOWN
113.9624 -42.2415 3.8 58.8 -159.2 5.7527 3.1 ------ UNKNOWN
226.4991 -4.3088 3.0 58.7 -25.9 5.2017 3.8 ------ UNKNOWN
174.1178 -31.8594 5.9 41.1 -98.8 3.0609 2.5 ------ UNKNOWN
UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-2.860000 23.916000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
135.4810 -40.5258 19.2 51.2 -141.7 -0.1865 -0.6 2.8 Vela X-1
170.2065 -60.4886 5.3 22.0 -142.4 -0.1471 -2.2 8.7 Cen X-3
186.5032 -62.9706 0.0 14.0 -141.6 -0.1307 -2.1 12.7 GX 301-2
244.8810 -15.6252 113.0 50.8 -1.6 -0.0142 -0.1 5.8 Sco X-1
255.8186 -37.9694 0.0 33.9 25.0 0.1554 1.8 10.9 4U 1700-377
256.5919 -36.5312 6.7 35.5 24.6 -0.1500 -1.7 10.0 GX 349+2
263.0275 -24.6534 6.1 48.5 23.6 0.3253 1.9 5.6 GX 1+4
264.5912 -44.3059 14.0 32.5 41.5 0.0739 0.8 10.8 4U 1735-44
270.3059 -25.1179 4.0 51.1 31.6 -0.9153 -2.9 2.6 GX 5-1
270.3569 -25.8866 24.3 50.5 32.1 0.1387 0.5 9.1 GRS 1758-258
262.8306 -33.7715 4.2 40.4 29.5 -0.3068 -2.8 8.8 GX 354-0
181.0423 -32.7623 0.5 37.6 -91.2 5.0272 25.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
Plot creation:
Sat May 30 18:21:20 EDT 2015