Tutorial GRB - ASI Science Data Center

Tutorial GRB
Analisi prompt emission
GRB 090510
Sara Cutini
Posizione Swift o LAT
Trigger GBM
Scaricate i dati dal
Fermi Science Support Center:
Link per LAT:
http://fermi.gsfc.nasa.gov/ssc/data/
Link per GBM:
ftp://legacy.gsfc.nasa.gov/fermi/data/gbm/bursts/
Dati LAT
Spacecraft: L*SC00.FIT
Fotoni: L*PH00.FIT
Dati GBM
fkeyprint glg_trigdat_all_bn090510016_v01.fit
DET_MASK=000100101000
b0 sta dalla parte dei n0-n5
b1 sta dalla parte dei n6-n11
hanno triggerato il 3,6 e 8 -> il segnale migliore è in n7, n8
+ b1 e b0
due file per ogni detector:
glg_cspec_n7_bn090510016_v03.rsp
glg_tte_n7_bn090510016_v00.fit
Curva di luce (GBM)
gtbin
cutini@sagrantino ~/tutorial_Fermi]$ gtbin
This is gtbin version ScienceTools-v9r15p2-fssc-20090808
Type of output file (CCUBE|CMAP|LC|PHA1|PHA2) [] LC
Event data file name[] glg_tte_n8_bn090510016_v00.fit
Output file name[] glg_tte_n8_bn090510016_v00.lc
Spacecraft data file name[] none
Algorithm for defining time bins (FILE|LIN|SNR) LIN
Start value for first time bin in MET[] INDEF
Stop value for last time bin in MET[] INDEF
Width of linearly uniform time bins in MET[] 0.05
Curva di luce (LAT)
LAT selezione in tempo e spazio:
[cutini@sagrantino ~/tutorial_Fermi]$ gtselect evclsmin=1 evclsmax=3
Input FT1 file[] L090924111444E0D2F37E92_PH00.fits
Output FT1 file[] grb090510.fits
RA for new search center (degrees) (0:360) [] 333.552
Dec for new search center (degrees) (-90:90) [] -26.598
radius of new search region (degrees) (0:180) [] 10
start time (MET in s) (0:) [] 263607770
end time (MET in s) (0:) [] 263607830
lower energy limit (MeV) (0:) [] 100
upper energy limit (MeV) (0:) []300000
maximum zenith angle value (degrees) (0:180) [] 105
Done.
curva di luce del LAT
cutini@sagrantino ~/tutorial_Fermi]$ gtbin
This is gtbin version ScienceTools-v9r15p2-fssc-20090808
Type of output file (CCUBE|CMAP|LC|PHA1|PHA2) [LC]
Event data file name[] grb090510.fits
Output file name[] grb090510.lc
Spacecraft data file name[] L090924114712E0D2F37E75_SC00.fits
Algorithm for defining time bins (FILE|LIN|SNR) [] LIN
Start value for first time bin in MET[] 263607770
Stop value for last time bin in MET[] 263607830
Width of linearly uniform time bins in MET[0.05]0.05
Mappa conteggi (LAT)
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gtbin
This is gtbin version ScienceTools-v9r15p2-fssc-20090808
Type of output file (CCUBE|CMAP|LC|PHA1|PHA2) [] CMAP
Event data file name[] grb090510.fits
Output file name[] grb090510.cmap
Spacecraft data file name[] L090924114712E0D2F37E75_SC00.fits
Size of the X axis in pixels[]120
Size of the Y axis in pixels[]120
Image scale (in degrees/pixel)[] 0.25
Coordinate system (CEL - celestial, GAL -galactic) (CEL|GAL) []CEL
First coordinate of image center in degrees (RA or galactic l)[] 333.552
Second coordinate of image center in degrees (DEC or galactic b)[] -26.598
Analisi spettarale Joint
1) Costruire il pha2 per i file del GBM
Mytime090510.txt
263607761.00 263607781.00-> bkg -21s - -1s
263607782.47 263607782.97-> burst 0.5s - 1s
cutini@sagrantino ~/tutorial_Fermi]$ gtbindef
This is gtbindef version ScienceTools-v9r15p2-fssc-20090808
Type of bins, E -- energy or T -- time[] T
File containing the ascii bin definitions[] 090510time.txt
Output file name[] 090510time.fit
gtbin
This is gtbin version ScienceTools-v9r15p2-fssc-20090808
Type of output file (CCUBE|CMAP|LC|PHA1|PHA2) [] PHA2
Event data file name[] glg_tte_n8_bn090510016_v00.fit
Output file name[] glg_tte_n8_bn090510016_v00.pha
Spacecraft data file name[] none
Algorithm for defining time bins (FILE|LIN|SNR) [] FILE
Name of the file containing the time bin definition[] 090510time.fit
1) Costruire il pha per il file del LAT->
stessa exposure del GBM- ritagliare il file LAT con
gtselect
gtbin
This is gtbin version ScienceTools-v9r15p2-fssc-20090808
Type of output file (CCUBE|CMAP|LC|PHA1|PHA2) [] PHA1
Event data file name[] grb090510_0.5-1.fits
Output file name[] grb090510_0.5-1.pha
Spacecraft data file name[] L090924114712E0D2F37E75_SC00.fits
Algorithm for defining energy bins (FILE|LIN|LOG) LOG
Start value for first energy bin in MeV[] 100
Stop value for last energy bin in MeV[] 300000
Number of logarithmically uniform energy bins[] 30
3) Costruire la matrice di risposta del LAT
cutini@sagrantino ~/tutorial_Fermi]$ gtrspgen
This is gtrspgen version ScienceTools-v9r15p2-fssc-20090808
Response calculation method (GRB, PS) (GRB|PS) GRB
Spectrum file name[]grb090510_0.5-1.pha
Spacecraft data file name[]L090924114712E0D2F37E75_SC00.fits
Output file name[]grb090510_0.5-1.rsp
Time of GRB (s)[]263607782.47
Response function to use, Handoff|DC2|DC2A|DC2FA|DC2BA|DC2FB etc
P6_V3_TRANSIENT
Algorithm for defining true energy bins (FILE|LIN|LOG) LOG
Start value for first energy bin in MeV[] 100
Stop value for last energy bin in MeV[]300000
Number of logarithmically uniform energy bins[]100
Run xspec…
Macro per xspec:
data 1 glg_tte_b1_bn090510016_v00.pha{2}
data 2 glg_tte_n7_bn090510016_v00.pha{2}
data 3 glg_tte_n8_bn090510016_v00.pha{2}
data 4 grb090510_0.5-1.pha
data 5 glg_tte_b0_bn090510016_v00.pha{2}
resp 1 glg_cspec_b1_bn090510016_v03.rsp
resp 2 glg_cspec_n7_bn090510016_v03.rsp
resp 3 glg_cspec_n8_bn090510016_v03.rsp
resp 5 glg_cspec_b0_bn090510016_v03.rsp
resp 4 grb090510_0.5-1.rsp
back 1 glg_tte_b1_bn090510016_v00.pha{1}
back 2 glg_tte_n7_bn090510016_v00.pha{1}
back 3 glg_tte_n8_bn090510016_v00.pha{1}
back 5 glg_tte_b0_bn090510016_v00.pha{1}
ign
ign
ign
ign
ign
1:1-5, 100-**
2:1-5, 100-**
3:1-5, 100-**
5:1-5, 100-**
4:5000000.-**
ign bad
setpl ene
setpl area
setpl rebin 5 8 1
setpl rebin 5 8 5
setpl rebin 5 5 2
setpl rebin 5 5 3
Afterglow analisi->Point Source
gtburstfit-> fit delle curve di luce del LAT con
la seguente funzione+ bkg costante :
A * exp(tau1 / (t - time0) + (t - time0) / tau2)
cutini@sagrantino ~/tutorial_Fermi]$ gtburstfit
This is gtburstfit version N/A
Name of file containing events[grb090510.lc]
How will initial values for fit be determined (AUTO|MAN|CALC) [MAN] AUTO
After initial guess but before any fitting, reduced chi square is 2.88075583
Parameters are:
Peak 1:
Amplitude = 6.964467164445661
Time0 = 263607770.025000005960464
Tau1 = 12.974999994039536
Tau2 = 12.974999994039536
Background = 0.035533018953253
After fit, reduced chi square is 0.47191809
Parameters are:
Peak 1:
Amplitude = 4.923873161368464
Time0 = 263607780.688873171806335
Tau1 = 8.326812911443128
Tau2 = 0.670326648779492
Background = 0.106599055717669
Bayesian Blocks computed for this data set are:
Interval
Average Counts
[263607770.02500001, 263607782.67500001]
0.02371542
[263607782.67500001, 263607783.32499999]
7.00000018
[263607783.32499999, 263607785.67500001]
1.12765958
[263607785.67500001, 263607830.02500001]
0.04735062