Field E and I photometry

Arne Henden
Feb 19, 1997

I've uploaded to storm.fnal.gov under incoming the two files:

These files contain published UBVRI photometry in the 'E' and 'I' fields for which I uploaded astrometric standards earlier. The current two sources of photometry are Landolt and Lanz. USE THE LANDOLT STANDARDS FIRST. The Lanz data is a compilation of UBVRI photometry from various literature sources, has no error bars attached to it, and probably uses Johnson I anyway. However, for setting zero points, Lanz's data is probably ok. I deleted those Landolt standards that had two or fewer measurements, as I do not consider those good enough to be standards. I have also included all of the observed stars, even if they are too bright or too faint for TASS, since there are so few stars anyway and they might be useful for other systems.

I have 6 nights on the 1.0m in March and will be continuing my photometry in the E and I fields, and will upload additional results for these fields if I get any photometric weather. I would consider my data as intermediate between Landolt and Lanz: on the Johnson/Kron-Cousins UBVRI system, but not good enough to be called 'standards'.

For those of you who are variable star observers: the E field has 800 new variables in it, and field I has 50 new variables. While many of these are too faint for TASS, you should be able to test your detection software in these two fields with good chance of finding a large number of variables.