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KIC 2856960 time series needed for system study

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weo's picture
KIC 2856960 time series needed for system study

AAVSO Alert Notice 670 announces a campaign by Dr. Thomas Marsh on the triple system KIC 2856960 beginning immediately. Please see the notice for details and observing instructions.

Many thanks, and Good observing,

Elizabeth O. Waagen, AAVSO HQ

B.P.Vietje's picture
Minimum SNR?

Getting a time series tonight at 180 Sec in Rc, with a Planewave CDK-17.  SNR is only about 22, binned 2x2, possibly during an eclipse/dip(?)

Should I shoot at 240 sec and get a slightly better SNR, or can the data be used at a little over 20?


Clear skies,


Brad Vietje, VBPA

Newbury, VT

Joseph H. Ulowetz
Joseph H. Ulowetz's picture
One hour of time series last night

I was able to get one hour of time series on this star last night, 3-4h UTC July 10, and then clouds came in.  I'm using a Celestron C9.25 with a V filter and 300 sec exposures, and I'm getting SNR of about 50.  I didn't notice anything obvious during the period I captured.

I expect to have better conditions tonight, although I understand this is getting towards the end of the expected eclipse window.




JBD's picture
Too bad...

It's really bad...
Here, in Quebec, the sky is covered by the smoke from the forest fires that come from Ontario.

Nex time!...

pablotwa's picture
Uploaded just now

I uploaded about 2 hrs worth in V,I and Clear. Celestron C-14 Edge HD

Joseph H. Ulowetz
Joseph H. Ulowetz's picture
Full night of data for July 11

I just uploaded 7 hours of data from last night, 2:30 - 9:30 UT (short summer nights).  Is there the need for additional nights? If not, I plan to return to my regular targets tonight.

I didn't notice any dimmings in my data.



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