Mkn 421: Chandra 1
st
Order
Dispersed Spectrum
•
F(0.5-2 keV) > 0.1 Crab
•
4.5 Mcts!!
•
~ 3000 ct/r.e., @ 21 Å
Enough to detect (at > 3
):
EW
Abs
2.5 m
Å, @ 21 Å
Implying:
N
OVII
10
15
cm
-2
NH
10
19
cm
-2
, for Z/Z
= 0.1
Path Lengths
1 Mpc, for
=20
MSSL, 24-25 October 2002