Feder Observatory

A Blog for Minnesota State University Moorhead's Paul P. Feder Observatory

Archive for August, 2013


Observing Log, August. 19, 2013 0

Posted on August 20, 2013 by Matt

There were two targets tonight:

+ V0440 Lac, a variable whose period is poorly determined.
+ HAT-P-23 b, an exoplanet.

HAT-P-23 b should be an interesting analysis challenge because the dimming is only 0.007 magnitude…an accuracy the data from this night might or might not be able to achieve.

Seeing was very good (temperature was ~80F, focus set to 2885, seeing 5-7 pixels FWHM). The beginning of the night was fairly clear, but by 3:30AM there were scattered light clouds which persisted until dawn. At least some of the images were affected by the clouds.

All images were shot in the R band. When the images were initially saved many were marked as FLAT that are really LIGHT. That will be fixed by August 20, 2013.

Observing Log, August 16, 2013 0

Posted on August 17, 2013 by Matt

Tonight was a public night for astronomy at the Regional Science Center so the first part of the evening was a very good time–showing folks images of the moon and Saturn when the sky was still fairly bright, and globular clusters/galaxies when it got darker.

The science target for the night was BVRI images of V0440 Lac. Seeing tonight was **exceptional**–if I had wanted to I could have had FWHM of 3-4 pixels. At that point you are starting to undersample the star, though, so I stuck with a focus that gave FWHM of 5-6 (temperature was about 75F and focus was set to 2855.

Observing Log, August 13, 2013 0

Posted on August 14, 2013 by Matt

I came out again tonight (third perfect night in a row!) to take BVRI images of a couple of variable stars, V0440 Lac and MY Aql. Conditions were great all night and there were no problems with the telescope or camera.

Updated MaxImDL to v5.23 0

Posted on August 13, 2013 by Matt

This release had some bug fixes but nothing major. Haven’t noticed any difference in how it operates so far.

Observing Log, August 12, 2013 0

Posted on August 13, 2013 by Matt

Another excellent night, with clear skies the whole time.

Temperature was about 70F at the start of the evening, with the focus set to 2860.

Targets were the exoplanet KOI 0196 b and a variable star V0440 Lac. Images were only taken in R band.

Observing Log, August 11, 2013 0

Posted on August 12, 2013 by Matt

The targets tonight were MY Aql and V0440 Lac. It was a beautiful night, clear skies the whole way through with basically no wind.

Temperature was 70F, focus set to 2860.

The standard star field shot tonight was SA112 SF1.

All images tonight were taken in the R filter only–neither of these variables has a known period so the purpose for now is to determine the period. Once the time of maximum can be predicted it would be useful to do multi-color photometry.

Perseid meteor shower was tonight–saw 41 meteors in roughly one hour!

Flat box maintenance 0

Posted on August 12, 2013 by Matt

I removed the aluminum foil cover from the round flat box and replaced it with aluminum tape. This shouldn’t affect taking flats in any way, but should be sturdier and longer-lasting than the foil solution.

Flat box with new light shielding

Flat box with new light shielding



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