YALO Nightly Observing Report for 1999 Aug 4

Observer: David Gonzalez
Observed for most of the night from 23:10 to 7:05 UTC.
Conditions were Non-Photometric most of the night.
Problems were encountered, see the summary for details.

Seeing and Weather:
   Beg: Seeing 1.4 arcsec, Cirrus, Winds Calm
   Mid: Seeing 2.0 arcsec, Cirrus, Winds Calm
   End: Seeing 2.0 arcsec, Overcast, Winds Calm

Observing Summary:

The new variac was installed. I performed tests to determine the necessary exposure time for each filter and I made the corresponding changes to the CCDCALIB script on Prospero. Arturo Gomez provided me with assistance. Thanks Arturo.
However, I didn't have enough time to to the IR flat tests which I did at the end of the night.
Differential magnitude for Aql X-1:
V=0.505
R=2.225

Darren, file ccd .0034 has a wrong name. I already edited it.


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Submitted by David Gonzalez on 1999 Aug 5 [6:24:06]