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AAVSOnet news 2013-10-29

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HQA
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Joined: 2010-05-10

Here is the current status of the AAVSOnet telescopes.


BSM_Berry  After cleaning the CCD, some defects are seen.  We are investigating this; may have to swap out cameras.

BSM_Hamren  closed down for a few weeks until the site operator returns.

BSM_NM  closed down until ~Nov9 as operator is out of town.

BSM_South  working fine

W30 limping along; new mount will be installed in a few weeks

SRO  working fine. backlog of images to process for researchers.

OC61  working fine, making improvements to pipeline

TMO61  working fine. backlog of images to process, getting pipeline implemented.

Re: OC61
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mrv
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Joined: 2010-12-21

Arne,

I see that OC61 is working again.  I have two stars that are on the queue for this scope: V3890 Sgr and V2487 Oph (both are NR).  Since July, I have not received any new images of either star.  V3890 Sgr in particular has shown some brightening recently and is still observable for a few more weeks from the southern hemisphere.

Also, I was wondering if TCs have been determined for this scope?

Thanks,

Bob

OC61 targets
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HQA
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Joined: 2010-05-10

Hi Bob,

You are right; looking at the logs, there have been no new recent observations of V3890 Sgr and V2487 Oph.  Let me increase their priorities so that you get a few new points before they disappear in the west.

I'm finishing up the TMO61 processing and calculation of its transformation coefficients, and then will return to OC61 and get its coefficients.  I'll post here when those values are available.

Arne

Re: TCs for OC61 and TMO61
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mrv
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Joined: 2010-12-21

Arne,

I was wondering if you have been able to calculate the transformation coefficients for OC61 and TMO61 yet.

Thanks,

Bob

TMO61 transformation coefficients
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HQA
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Hi Bob,

Here are the transformation coefficients for TMO61.  This telescope uses the Astrodon filters, but with a KAF8300 sensor.  This sensor has less blue and red response than some of the other Kodak sensors, which is why the (B-V) and (Rc-Ic) coefficients are so large.  The pixel match and field of view are pretty good with the KAF8300; we might consider moving to an ST-10XME instead in the future to give a bit more QE and full well depth, but not until we've had a year under our belt and see whether we need the smaller pixels of the 8300 under superb seeing conditions.


Tv  -0.072

Tbv 1.249

Tvr 1.018

Tri 0.810

Tvi 0.917

Based on 6 nights in October.

Arne

AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484