Magnitude Scale Zero Points

We converted magnitude-based photometry to fluxes using the following zero points.

Band Reference lambda Zero pt (Jy) Zero pt (Jy)

(microns) (Vega) (alpha=1)

U 0.36 1317 1779

B 0.44 4333 4047

V 0.54 3647 3536

R 0.70 2791 2869

I 0.90 1871 2339

J 1.25 1567 1657

H 1.65 1016 1053

K 2.20 687 710

N34 3.40 325 321

L' 3.80 256 270

M 4.8 161 167

N 10.1 39 38

Q 20.25 9.8 11

Band	Reference lambda	Zero pt (Jy)	Zero pt (Jy)
	(microns)	(Vega)	(alpha=1)
U	0.36	1317	1779
B	0.44	4333	4047
V	0.54	3647	3536
R	0.70	2791	2869
I	0.90	1871	2339
J	1.25	1567	1657
H	1.65	1016	1053
K	2.20	687	710
N34	3.40	325	321
L'	3.80	256	270
M	4.8	161	167
N	10.1	39	38
Q	20.25	9.8	11

The zero points correspond to a system in which the magnitude of Vega is exactly zero. Values are given for an object with the same spectrum as Vega and for an object with a flat energy distribution (power law spectrum $F(\nu) = \nu^{-\alpha}$ of slope alpha=1).