Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minutes to calcaulte
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
238.7656 -54.0494 0.0236 33.6 -143.6 0.0302 8.1 TRIG_01072706
------------------------------------------
Foreground time interval of the image:
0.000 0.004 (delta_t = 0.004 [sec])
Background time interval of the image:
-90.311 -7.612 (delta_t = 82.699 [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
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)
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 0.004 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.44136 ( -0.642892 0.758819 )
Norm@50keV : 2.52932E-02 ( -0.0147509 0.0177152 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.33 using 59 PHA bins.
# Reduced chi-squared = 1.058 for 57 degrees of freedom
# Null hypothesis probability = 3.563238e-01
Photon flux (15-150 keV) in 0.004 sec: 23.1469 ( -8.19939 8.19218 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.12608e-09 ( -1.10091e-09 1.10094e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.004 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 9.37409E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.92 using 59 PHA bins.
# Reduced chi-squared = 1.374 for 56 degrees of freedom
# Null hypothesis probability = 3.329609e-02
Photon flux (15-150 keV) in 0.004 sec: 55.3324 55.7710 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.7923e-12 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.004 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.93831 ( 0.165595 9.93831 )
beta : -4.44078 ( -0.756752 0.643636 )
Epeak [keV] : 79.3643 ( -79.3643 -79.3643 )
Norm@50keV : 3.43937 ( -2.00349 2.40795 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.33 using 59 PHA bins.
# Reduced chi-squared = 1.097 for 55 degrees of freedom
# Null hypothesis probability = 2.891494e-01
Photon flux (15-150 keV) in 0.004 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] : 3.98012 (-0.402645 0.398907)
R^2/D10^2 : 1100.02 (-545.335 928.305)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.77 using 59 PHA bins.
# Reduced chi-squared = 0.8206 for 57 degrees of freedom
# Null hypothesis probability = 8.310570e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.906e-09 1.485e-09
25- 50 1.390e-09 5.984e-10
50-150 1.640e-11 1.322e-11
15-150 5.313e-09 2.128e-09
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.23246 (-1.59797 1.92909)
Norm : 1657.97 (-830.159 1321.69)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.055e-09 1.270e-09
25- 50 9.925e-10 4.618e-10
50-150 3.836e-11 3.311e-11
15-150 4.086e-09 2.026e-09
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.42985E-04 (0.000774972 -0.000142985)
R1^2/D10^2 : 1.52403E+05 (-152406 -152406)
kT2 [keV] : 3.97853 (-0.403177 0.398386)
R2^2/D10^2 : 1102.56 (-545.544 928.111)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.632e-09 2.408e-06
25- 50 1.452e-09 2.620e-05
50-150 4.222e-11 7.378e-04
15-150 4.126e-09 1.069e-03
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 0.004 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.44136 ( -0.642892 0.758819 )
Norm@50keV : 2.52932E-02 ( -0.0147509 0.0177152 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.33 using 59 PHA bins.
# Reduced chi-squared = 1.058 for 57 degrees of freedom
# Null hypothesis probability = 3.563238e-01
Photon flux (15-150 keV) in 0.004 sec: 23.1469 ( -8.19939 8.19218 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.12608e-09 ( -1.10091e-09 1.10094e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.004 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 9.37409E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.92 using 59 PHA bins.
# Reduced chi-squared = 1.374 for 56 degrees of freedom
# Null hypothesis probability = 3.329609e-02
Photon flux (15-150 keV) in 0.004 sec: 55.3324 55.7710 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.7923e-12 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.004 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.93831 ( 0.165595 9.93831 )
beta : -4.44078 ( -0.756752 0.643636 )
Epeak [keV] : 79.3643 ( -79.3643 -79.3643 )
Norm@50keV : 3.43937 ( -2.00349 2.40795 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.33 using 59 PHA bins.
# Reduced chi-squared = 1.097 for 55 degrees of freedom
# Null hypothesis probability = 2.891494e-01
Photon flux (15-150 keV) in 0.004 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 3.98012 (-0.402645 0.398907)
R^2/D10^2 : 1100.02 (-545.335 928.305)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.906e-09 1.600e-09
25- 50 1.390e-09 6.208e-10
50-150 1.640e-11 1.256e-11
15-150 5.313e-09 1.963e-09
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.23246 (-1.59797 1.92909)
Norm : 1657.97 (-830.159 1321.69)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.055e-09 1.347e-09
25- 50 9.925e-10 4.949e-10
50-150 3.836e-11 3.257e-11
15-150 4.086e-09 1.609e-09
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.42985E-04 (0.000774972 -0.000142985)
R1^2/D10^2 : 1.52403E+05 (-152406 -152406)
kT2 [keV] : 3.97853 (-0.403177 0.398386)
R2^2/D10^2 : 1102.56 (-545.544 928.111)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.632e-09 2.598e-06
25- 50 1.452e-09 2.422e-05
50-150 4.222e-11 5.738e-04
15-150 4.126e-09 9.504e-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: 4.44136 ( -0.642892 0.758819 )
Norm@50keV : 2.52932E-02 ( -0.0147509 0.0177152 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.33 using 59 PHA bins.
# Reduced chi-squared = 1.058 for 57 degrees of freedom
# Null hypothesis probability = 3.563238e-01
Photon flux (15-150 keV) in 0.004 sec: 23.1469 ( -8.19939 8.19218 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.12608e-09 ( -1.10091e-09 1.10094e-09 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 9.37409E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.92 using 59 PHA bins.
# Reduced chi-squared = 1.374 for 56 degrees of freedom
# Null hypothesis probability = 3.329609e-02
Photon flux (15-150 keV) in 0.004 sec: 55.3324 55.7710 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.7923e-12 ( 0 0 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.93831 ( 0.165595 9.93831 )
beta : -4.44078 ( -0.756752 0.643636 )
Epeak [keV] : 79.3643 ( -79.3643 -79.3643 )
Norm@50keV : 3.43937 ( -2.00349 2.40795 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.33 using 59 PHA bins.
# Reduced chi-squared = 1.097 for 55 degrees of freedom
# Null hypothesis probability = 2.891494e-01
Photon flux (15-150 keV) in 0.004 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) = 7.36e-10
S(50-100 keV) = 1.36e-10
T90 vs. Hardness ratio plot
T90 = 0.00400006771087646 sec.
Hardness ratio (energy fluence ratio) = 0.184783
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 0.803883
Count Ratio (50-100 keV) / (15-25 keV) = 0.162508
Mask shadow pattern
IMX = -5.343208759070230E-01, IMY = 3.938655313795908E-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:
-90.311400 -7.612000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9727 -15.6306 0.5 22.3 -56.2 4.2933 22.5 0.7 Sco X-1
256.0368 -37.8609 3.2 13.6 -138.2 0.5282 3.5 2.6 4U 1700-377
256.2452 -36.3467 5.7 12.4 -134.3 0.2937 2.0 10.3 GX 349+2
262.8953 -24.6938 8.0 3.3 -41.5 0.2265 1.5 6.9 GX 1+4
264.5247 -44.3640 12.2 17.5 -169.6 0.1546 0.9 10.7 4U 1735-44
268.4149 -1.4975 5.5 25.5 14.0 -0.3517 -2.1 3.9 SW J1753.5-0127
270.2177 -25.1073 4.3 4.5 74.9 0.4360 2.8 4.0 GX 5-1
270.2148 -25.6848 6.3 4.2 82.0 0.3183 2.1 5.9 GRS 1758-258
273.9874 -14.0015 2.2 15.1 40.3 0.8525 5.2 2.3 GX 17+2
275.9728 -30.5098 9.4 9.7 121.9 -0.1947 -1.2 8.9 H1820-303
285.0835 -24.7586 9.2 17.6 95.0 -0.2228 -1.3 10.1 HT1900.1-2455
288.8926 10.9333 6.1 44.0 41.5 0.8440 1.9 5.6 GRS 1915+105
263.0330 -33.9552 8.2 7.4 -155.0 0.2149 1.4 7.6 GX 354-0
290.8228 16.9699 2.2 50.2 39.6 5.1657 5.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
0.000000 0.004000
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.8317 -15.5162 4.3 22.5 -56.1 -0.0084 -2.7 11.3 Sco X-1
256.1845 -37.9878 0.0 13.7 -138.9 0.0030 1.3 12.7 4U 1700-377
256.3752 -36.4417 6.3 12.4 -135.0 0.0043 1.8 3.1 GX 349+2
263.0429 -24.6165 7.9 3.3 -39.0 -0.0034 -1.5 8.0 GX 1+4
264.9113 -44.5038 7.7 17.6 -170.5 0.0035 1.5 7.9 4U 1735-44
268.2564 -1.6077 5.2 25.4 13.7 -0.0058 -2.2 11.5 SW J1753.5-0127
270.1330 -24.9507 4.8 4.5 72.6 -0.0059 -2.4 11.3 GX 5-1
270.4210 -25.6472 4.7 4.4 82.2 -0.0059 -2.5 8.6 GRS 1758-258
274.0714 -14.1755 6.5 14.9 40.9 -0.0043 -1.8 9.2 GX 17+2
275.7199 -30.2552 0.0 9.4 120.8 -0.0017 -0.7 12.6 H1820-303
284.9546 -24.9198 6.7 17.4 95.4 -0.0047 -1.7 4.4 HT1900.1-2455
288.7331 11.0766 9.5 44.1 41.2 0.0056 1.2 8.8 GRS 1915+105
262.8308 -33.9992 0.0 7.5 -153.9 0.0026 1.1 12.6 GX 354-0
301.1228 -55.6210 2.3 38.4 155.9 0.0171 4.9 ------ UNKNOWN
238.7656 -54.0494 1.4 33.6 -143.6 0.0302 8.1 ------ UNKNOWN
198.8889 -69.3528 2.1 56.8 -149.5 0.0984 5.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
62.188600 329.468000
330.388000 883.638000
884.388000 962.458200
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
170.4848 -60.4611 7.5 35.8 -147.4 -2.5347 -1.5 10.9 Cen X-3
186.6386 -62.8333 3.2 27.8 -148.3 4.3029 3.7 3.8 GX 301-2
244.9949 -15.6408 0.3 38.7 -9.5 44.8811 34.1 0.9 Sco X-1
256.0043 -37.8402 1.0 20.0 23.9 11.4572 11.3 0.9 4U 1700-377
256.5163 -36.4325 6.0 21.4 23.0 1.9985 1.9 3.9 GX 349+2
262.8661 -24.6291 9.1 34.4 21.9 1.7979 1.3 10.5 GX 1+4
264.8157 -44.4458 4.6 19.3 51.9 2.9377 2.5 3.1 4U 1735-44
270.3517 -24.9657 4.2 37.3 32.4 4.8795 2.7 7.7 GX 5-1
270.1581 -25.7509 7.6 36.5 32.9 2.6065 1.5 7.8 GRS 1758-258
274.1651 -14.1943 0.0 48.5 29.5 -2.6775 -0.8 13.3 GX 17+2
275.7871 -30.2320 23.4 35.6 44.1 0.8945 0.5 10.8 H1820-303
285.0744 -24.9572 7.8 44.8 49.4 3.9014 1.5 3.0 HT1900.1-2455
262.9770 -33.9804 9.5 26.3 31.0 -1.4002 -1.2 8.8 GX 354-0
282.1042 -16.4584 3.7 50.3 39.8 18.4440 3.1 ------ UNKNOWN
281.3300 -24.5691 3.2 43.1 45.1 9.7748 3.7 ------ UNKNOWN
267.4877 -14.1100 3.0 45.8 21.4 7.5722 3.8 ------ UNKNOWN
190.8461 -43.2725 3.0 32.8 -109.8 7.6114 3.8 ------ UNKNOWN
230.9758 -2.5886 2.4 51.9 -29.0 13.0058 4.9 ------ UNKNOWN
Plot creation:
Sat Sep 11 16:53:43 EDT 2021