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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
221.5412 -32.1539 0.0111 37.9695 -97.4762 10.3427010 17.215 TRIG_00613160
Foreground time interval of the image:
-0.744 172.328 (delta_t = 173.072 [sec])
Background time interval of the image:
-239.064 -0.744 (delta_t = 238.320 [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 4.096000
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 4.096000
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 4.096000
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 -0.744 sec. to 172.328 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.68028 ( -0.120246 0.121233 )
Norm@50keV : 3.85298E-03 ( -0.000263306 0.000262214 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.33 using 59 PHA bins.
# Reduced chi-squared = 0.9531 for 57 degrees of freedom
# Null hypothesis probability = 5.760370e-01
Photon flux (15-150 keV) in 173.1 sec: 0.508244 ( -0.0353996 0.0355239 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.18528e-06 ( -4.41943e-07 4.44502e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.744 sec. to 172.328 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25169 ( -0.509858 0.448128 )
Epeak [keV] : 86.2331 ( -24.0874 -86.2331 )
Norm@50keV : 6.34369E-03 ( -0.00254416 0.00496883 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.74 using 59 PHA bins.
# Reduced chi-squared = 0.9240 for 56 degrees of freedom
# Null hypothesis probability = 6.365884e-01
Photon flux (15-150 keV) in 173.1 sec: 0.495360 ( -0.037815 0.037904 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.97446e-06 ( -4.9768e-07 4.98026e-07 ) ergs/cm2
Band function
Time interval is from -0.744 sec. to 172.328 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.25161 ( -0.3934 0.406779 )
beta : -10.00000 ( 10 20 )
Epeak [keV] : 86.2124 ( -21.0125 -86.2124 )
Norm@50keV : 6.34345E-03 ( -0.00248802 0.00375225 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.74 using 59 PHA bins.
# Reduced chi-squared = 0.9408 for 55 degrees of freedom
# Null hypothesis probability = 5.998145e-01
Photon flux (15-150 keV) in 173.1 sec: 0.494217 ( 6.50578 -0.036744 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.02497e-06 ( -6.02376e-06 -4.58438e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.8690 (-1.18098 1.31029)
R^2/D10^2 : 7.11179E-02 (-0.0199255 0.0275308)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 100.36 using 59 PHA bins.
# Reduced chi-squared = 1.7607 for 57 degrees of freedom
# Null hypothesis probability = 3.453729e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.006e-07 6.604e-08
25- 50 1.845e-06 1.508e-07
50-150 2.325e-06 3.021e-07
15-150 4.670e-06 3.826e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 148.487 (-41.5703 -145.891)
Norm : 2.06722 (-0.161183 0.212913)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.82 using 59 PHA bins.
# Reduced chi-squared = 0.9092 for 57 degrees of freedom
# Null hypothesis probability = 6.690554e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.198e-07 9.261e-08
25- 50 1.702e-06 2.029e-07
50-150 3.346e-06 1.299e-06
15-150 5.969e-06 1.476e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.78023 (-1.2338 1.40585)
R1^2/D10^2 : 0.636118 (-0.303693 0.68528)
kT2 [keV] : 24.1602 (-4.21871 6.92055)
R2^2/D10^2 : 7.35172E-03 (-0.00443584 0.00808773)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.59 using 59 PHA bins.
# Reduced chi-squared = 0.8835 for 55 degrees of freedom
# Null hypothesis probability = 7.164270e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.171e-07 2.517e-07
25- 50 1.743e-06 3.507e-07
50-150 3.331e-06 1.245e-06
15-150 5.991e-06 1.562e-06
Peak spectrum fit
Power-law model
Time interval is from 38.972 sec. to 39.972 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.97825 ( -0.393283 0.427447 )
Norm@50keV : 1.33106E-02 ( -0.00369396 0.00358678 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.63 using 59 PHA bins.
# Reduced chi-squared = 1.222 for 57 degrees of freedom
# Null hypothesis probability = 1.216185e-01
Photon flux (15-150 keV) in 1 sec: 1.97682 ( -0.484248 0.486233 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.2263e-07 ( -3.20389e-08 3.28094e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 38.972 sec. to 39.972 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.642634 ( -6.45585 2.61739 )
Epeak [keV] : 40.1428 ( )
Norm@50keV : 0.458018 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.67 using 59 PHA bins.
# Reduced chi-squared = 1.190 for 56 degrees of freedom
# Null hypothesis probability = 1.557155e-01
Photon flux (15-150 keV) in 1 sec: 1.79334 ( -0.5092 0.53022 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.8381e-08 ( -2.86284e-08 4.0463e-08 ) ergs/cm2
Band function
Time interval is from 38.972 sec. to 39.972 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.80930 ( -3.13727 -1.60645 )
beta : -3.06367 ( 3.16905 1.21167 )
Epeak [keV] : 36.1045 ( -13.0625 17.8377 )
Norm@50keV : 11.5206 ( -11.4933 165.217 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.68 using 59 PHA bins.
# Reduced chi-squared = 1.194 for 55 degrees of freedom
# Null hypothesis probability = 1.534935e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.09306e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.0481 (-1.96305 2.57527)
R^2/D10^2 : 0.969144 (-0.580902 1.30367)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.67 using 59 PHA bins.
# Reduced chi-squared = 1.170 for 57 degrees of freedom
# Null hypothesis probability = 1.787154e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.996e-08 1.087e-08
25- 50 4.996e-08 2.199e-08
50-150 2.644e-08 1.487e-08
15-150 9.637e-08 4.424e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 65.5758 (-29.6931 89.2507)
Norm : 10.1849 (-3.33113 4.87086)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.03 using 59 PHA bins.
# Reduced chi-squared = 1.194 for 57 degrees of freedom
# Null hypothesis probability = 1.504044e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.593e-08 8.970e-09
25- 50 4.052e-08 1.812e-08
50-150 4.952e-08 3.454e-08
15-150 1.160e-07 5.392e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 199.969 ( )
R1^2/D10^2 : 8.54714E-05 (-8.54714e-05 -8.54714e-05)
kT2 [keV] : 9.43518 (-1.70949 2.5318)
R2^2/D10^2 : 1.18424 (-0.718249 0.631569)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.48 using 59 PHA bins.
#Fit statistic : Chi-Squared = 65.42 using 59 PHA bins.
# Reduced chi-squared = 1.190 for 55 degrees of freedom
# Reduced chi-squared = 1.189 for 55 degrees of freedom
# Null hypothesis probability = 1.575808e-01
# Null hypothesis probability = 1.587562e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.965e-08 1.162e-08
25- 50 4.796e-08 2.914e-08
50-150 4.534e-08 2.001e-08
15-150 1.130e-07 5.765e-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: 1.68028 ( -0.120246 0.121233 )
Norm@50keV : 3.85298E-03 ( -0.000263306 0.000262214 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.33 using 59 PHA bins.
# Reduced chi-squared = 0.9531 for 57 degrees of freedom
# Null hypothesis probability = 5.760370e-01
Photon flux (15-150 keV) in 173.1 sec: 0.508244 ( -0.0353996 0.0355239 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.18528e-06 ( -4.41943e-07 4.44502e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25169 ( -0.509858 0.448128 )
Epeak [keV] : 86.2331 ( -24.0874 -86.2331 )
Norm@50keV : 6.34369E-03 ( -0.00254416 0.00496883 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.74 using 59 PHA bins.
# Reduced chi-squared = 0.9240 for 56 degrees of freedom
# Null hypothesis probability = 6.365884e-01
Photon flux (15-150 keV) in 173.1 sec: 0.495360 ( -0.037815 0.037904 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.97446e-06 ( -4.9768e-07 4.98026e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.25161 ( -0.3934 0.406779 )
beta : -10.00000 ( 10 20 )
Epeak [keV] : 86.2124 ( -21.0125 -86.2124 )
Norm@50keV : 6.34345E-03 ( -0.00248809 0.00375226 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.74 using 59 PHA bins.
# Reduced chi-squared = 0.9408 for 55 degrees of freedom
# Null hypothesis probability = 5.998145e-01
Photon flux (15-150 keV) in 173.1 sec: 0.494217 ( 6.50578 -0.036744 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.02497e-06 ( -6.02376e-06 -4.58438e-07 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 1.66e-06
S(50-100 keV) = 2.07e-06
T90 vs. Hardness ratio plot
T90 = 152.304000020027 sec.
Hardness ratio (energy fluence ratio) = 1.24699
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.38165
Count Ratio (50-100 keV) / (15-25 keV) = 0.998152
Mask shadow pattern
IMX = -1.015444798698714E-01, IMY = 7.737949248350040E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000
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:
-239.064000 -0.744000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9948 -15.6243 0.2 24.4 -50.5 16.4717 53.2 1.3 Sco X-1
256.0506 -37.8094 1.7 11.2 -127.2 1.6279 6.8 3.7 4U 1700-377
256.3597 -36.4694 3.3 10.3 -122.1 0.8487 3.5 4.6 GX 349+2
262.8588 -24.8871 13.5 6.2 -22.3 0.2228 0.9 11.8 GX 1+4
264.9477 -44.4669 6.2 14.2 -169.1 0.4411 1.9 8.8 4U 1735-44
268.2934 -1.3906 7.0 29.0 11.4 0.4940 1.7 5.8 SW J1753.5-0127
270.3688 -25.0722 2.5 6.4 42.9 1.1201 4.5 4.6 GX 5-1
270.3777 -25.7220 5.1 5.9 46.5 0.5758 2.4 4.3 GRS 1758-258
273.9153 -14.1997 23.3 17.6 32.5 0.1330 0.5 11.1 GX 17+2
275.9854 -30.5076 10.3 8.4 100.7 0.2883 1.1 9.0 H1820-303
285.0852 -24.9725 9.6 17.5 83.9 0.3661 1.2 4.1 HT1900.1-2455
288.8662 10.9042 6.1 46.6 38.5 2.1239 1.9 4.7 GRS 1915+105
262.8867 -33.8677 6.3 4.5 -134.9 0.4809 1.8 5.5 GX 354-0
301.0839 -42.4333 2.5 30.3 130.4 1.7590 4.6 ------ UNKNOWN
267.5519 19.3711 3.0 49.7 8.8 2.5935 3.8 ------ UNKNOWN
320.1202 -79.9642 2.9 54.1 177.1 3.8891 3.9 ------ UNKNOWN
266.5968 -32.2274 1.9 1.9 177.7 1.7287 6.1 ------ UNKNOWN
243.2829 -41.2127 2.7 21.5 -119.6 1.1266 4.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-0.744000 172.328000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
245.0005 -15.6336 2.5 24.4 -50.5 1.1336 4.6 1.3 Sco X-1
256.1687 -37.6937 0.0 11.1 -127.0 -0.1967 -1.0 12.5 4U 1700-377
256.5214 -36.3409 6.1 10.1 -121.9 -0.3547 -1.9 6.4 GX 349+2
263.1856 -24.8523 10.0 6.1 -19.7 -0.2241 -1.2 11.6 GX 1+4
264.5475 -44.5123 8.0 14.2 -168.0 0.2891 1.4 9.2 4U 1735-44
268.2247 -1.3942 5.2 29.0 11.2 -0.5260 -2.2 9.3 SW J1753.5-0127
270.4581 -25.1163 10.4 6.4 43.7 -0.2142 -1.1 9.7 GX 5-1
270.1594 -25.8547 4.2 5.7 45.7 -0.5151 -2.7 10.2 GRS 1758-258
273.8651 -13.9078 7.3 17.9 32.0 -0.3486 -1.6 11.3 GX 17+2
276.0188 -30.1978 5.5 8.5 98.6 0.4312 2.1 11.3 H1820-303
285.0080 -25.0667 41.6 17.4 84.1 -0.0620 -0.3 8.9 HT1900.1-2455
288.8491 10.9229 6.5 46.7 38.4 1.3447 1.8 3.3 GRS 1915+105
262.8186 -33.9281 9.6 4.6 -134.9 0.2463 1.2 10.2 GX 354-0
294.1361 -56.3558 2.1 32.5 158.3 1.3365 5.5 ------ UNKNOWN
209.5123 -66.9184 2.2 49.4 -147.3 2.8580 5.1 ------ UNKNOWN
221.5412 -32.1540 0.7 38.0 -97.5 10.3433 17.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
647.036610 835.467500
840.936000 900.636000
900.936000 962.973300
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
83.6343 22.0148 0.6 49.0 2.9 11.7283 20.7 0.1 Crab
310.6046 54.8443 2.6 45.7 165.9 2.1450 4.4 ------ UNKNOWN
70.5011 37.9648 2.8 31.1 15.3 1.2530 4.2 ------ UNKNOWN
95.5871 48.4961 2.3 27.5 -27.7 1.1511 5.1 ------ UNKNOWN
120.2231 72.9513 2.7 20.6 -95.3 1.1202 4.2 ------ UNKNOWN
246.0227 60.5716 2.2 51.1 -149.3 3.8368 5.2 ------ UNKNOWN
168.5117 65.1631 3.4 38.4 -104.5 2.3510 3.4 ------ UNKNOWN
212.8192 62.7350 3.6 48.0 -129.0 4.0298 3.2 ------ UNKNOWN
Plot creation:
Thu May 28 14:21:56 EDT 2015