Документ взят из кэша поисковой машины. Адрес оригинального документа : http://hea-www.harvard.edu/~pgreen/figs/xray_cheat.pdf Дата изменения: Wed Sep 24 18:06:13 2008 Дата индексирования: Tue Oct 2 00:58:54 2012 Кодировка: Поисковые слова: http astrokuban.info astrokuban

X-ray analysis Cheat Sheet

keV to erg Plank constant Exp time Exp map (pix i,j) Exp map (src avg) Effective area Src counts Bkg counts Net counts Photon flux Energy flux Energy band Power law spectrum Energy index Photon index Energy Conv Factor

1 keV h T Eij ES Aeff CS CB C
N

= =

1.602 в 10 6.626 в 10

-9 -27

erg erg s sec cts photon-1 sec cm2 cts photon-1 sec cm2 Effective area * Time cm2 (typical) cts cts cts photons erg cm- keV erg cm- Typical Typical cm-2 sec- 2 sec-1
2 1

=
S

Eij /
S

1

fp f h0 , h1 f ECF

Aeff T = 340 Total cts in src reg Total cts in bkg reg Eij = CS - CB S B Eij = CN /ES = fp · ECF 0.5, 8 = k k 1- (1 /0 )+1 - 1 (1 /0 ) - 1 + 1
-9

sec-1 Hz- = -0.7 = 1.7
1

1

= =

h0

erg photons-

2.83 в 10

0 1

erg photons-1 (E =0.5-8 keV, = 1.7) erg

Redshift Luminosity

z L = = = =

L d 4 d2 · f d l

1 /(1+z ) 0 /(1+z )

erg erg erg cm

4 d 2 l ·f (1 + z )+1 K
corr

· 4 d 2 · f l

K correction Luminosity dist

K

corr

d

l

= =

(1 + z )-2 (from cosmology calc)