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(cba:news) HT Cas in let's-hope-super outburst (Joe Patterson) [2015-10-24T20:51:00Z]



Hi Bill,

Yes, I'd say so - and thanks for asking! The rarity of the outbursts, the deep eclipses, the brightness, the good timing of the season... it's too much to ignore. Fire away!

BTW, SCRATCH V1294 Tau (Tau 2) from the CBA target list. John Thorstensen has just verified Porb from radial-velocity observations. From this, all our candidate periods from the 2002 observations fall into place. We just can't improve on the 2002 findings, now that the basic confirmation comes from an independent source. (We found that period too, but sandwiched between 2 others, which now declare themselves to be the positive and negative superhump. A groovy binary

HT Cas - an old friend. I attach the first paper written on it, also the place where the "QPO" and "DNO" terminology originated. Some good light curves in there. Its CV nature was discovered by Howard Bond (as usual!).

joe

Good for small scopes too, btw - as long as it stays bright.


On 10/24/2015 4:10 PM, Bill Stein wrote:
Is this star of interest to CBA for observations?  I could observe it
tonight.  I think last major super outburst was in November 2010.

See: http://arxiv.org/abs/1312.5211

Bill

Las Cruces, NM

*From:*cvnet-outburst@xxxxxxxxxxxxxxx
[mailto:cvnet-outburst@xxxxxxxxxxxxxxx]
*Sent:* Saturday, October 24, 2015 1:35 PM
*To:* Cvnet Outburst
*Cc:* Baavss Alert
*Subject:* Re: [cvnet-outburst] FW: [vsnet-alert 19190] ASAS-SN data:
bright outburst of HT Cas

Correction. Magnitude should be 13.3 not 13.6. Apologies for any
confusion.  I noted a comparison star magnitude rather than HT Cas in my
last report.

Gary

On 24 October 2015 at 20:27, Gary Poyner <garypoyner@xxxxxxxxx
<mailto:garypoyner@xxxxxxxxx>> wrote:

HT Cas

Oct 24.799     13.6 visual     Outburst

There is an eclipse ephemeris here
http://www.garypoyner.pwp.blueyonder.co.uk/HTCAS15.txt

It's in need of updating for precise timings of minimum, but it will
give a good idea as to when eclipses are due.

I made some visual eclipse observations during the 1999 and 2002
outbursts.  Eclipses are around 2 mags deep and last ~20 minutes when in
outburst.

Gary

------------------------------------------------------

Gary Poyner FRAS
garypoyner@xxxxxxxxx <mailto:garypoyner@xxxxxxxxx>

http://www.variablestars.co.uk <http://www.variablestars.co.uk/>
"You can always tell a Brummie....but you can't tell him much"!



--

------------------------------------------------------
Gary Poyner FRAS
garypoyner@xxxxxxxxx <mailto:garypoyner@xxxxxxxxx>

http://www.variablestars.co.uk <http://www.variablestars.co.uk/>
"You can always tell a Brummie....but you can't tell him much"!

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