Henden vs. Tass

[Michael Koppelman <lolife@bitstream.net>]

Using Arne's photometry, I come up with this comparison for Henden vs. 
Tass:

Star     deltaV   deltaV-I
--------------------------
7482519  -0.04    0.14
7481474  -0.06    0.14
7482263  -0.09    0.08

Each column is Henden - Tass.


For comparison here's Henden vs. Tycho-2:

Star     deltaV   deltaB-V
--------------------------
7482519  -0.07    0.58
7481474  -0.14    0.39
7482263   0.26   -0.58

Each column is Henden - Tycho-2.

Tycho can't be trusted at this magnitude. Tass, in this comparison, is 
dimmer than Henden by about 0.06 in V and about 0.19 in I.

Michael Koppelman