Announced just in April/2011 along with two other finds (WASP-35b and 51b),
WASP-48b requires 190 minutes to transit its mag 11.66 host star at a depth of
10.8 mmag.

Here is my result from last night:
http://www.perseus.gr/Astro-Photometry-WASP-48-20110707.htm .

Anthony.

Hello,

This may not be the appropriate place to post this message if so I apologise. 
However, as we are all doing similar work the advice/experience I'm looking
would be here.

I'm about to embark on setting up the best observatory I can before I get
married.  It will be the only chance I will ever get I expect.

My line of research will primarily be photometry/astrometry of asteroids, and
obtaining light curves of exo-planets.  Also S/N and GRB's DSO if time allows. 
I'm aware this may seem ambitious, but I have already started (as a novice) with
the asteroids using robotic telescopes and I'll just see how things progress.

I plan to obtain a Paramount ME mount.

Re- telescopes I'm considering  either a 14" -16" Meade LX200 ACF or the
Celestron 14" edge  OTA only.

The celstron being more expensive than the 16" Meade.  But the Meade has the
greater light gathering power and the new ACF may well perform well enough.

I have obtained limited advice so far which tends towards the Celestron sharp
edge to edge images.


Does any body have experience of either or both telescopes.  I would appreciate
any advice  re optical performance and/or performance of the tube.  i.e
flexture, mirror shift. Comments for or against either would be welcome.

many thanks for your time,

Eric

I would opt for a 10" RC from RCOS if that is in your budget.

--Bob

Robert Vanderbei

"And you may ask yourself...  Am I right?... Am I wrong?"  -- Talking Heads

On Jul 10, 2011, at 11:21 AM, Americo wrote:

> Hello,
>
> This may not be the appropriate place to post this message if so I apologise. 
However, as we are all doing similar work the advice/experience I'm looking
would be here.
>
> I'm about to embark on setting up the best observatory I can before I get
married.  It will be the only chance I will ever get I expect.
>
> My line of research will primarily be photometry/astrometry of asteroids, and
obtaining light curves of exo-planets.  Also S/N and GRB's DSO if time allows. 
I'm aware this may seem ambitious, but I have already started (as a novice) with
the asteroids using robotic telescopes and I'll just see how things progress.
>
> I plan to obtain a Paramount ME mount.
>
> Re- telescopes I'm considering  either a 14" -16" Meade LX200 ACF or the
Celestron 14" edge  OTA only.
>
> The celstron being more expensive than the 16" Meade.  But the Meade has the
greater light gathering power and the new ACF may well perform well enough.
>
> I have obtained limited advice so far which tends towards the Celestron sharp
edge to edge images.
>
>
> Does any body have experience of either or both telescopes.  I would
appreciate any advice  re optical performance and/or performance of the tube. 
i.e flexture, mirror shift. Comments for or against either would be welcome.
>
> many thanks for your time,
>
> Eric

Eric,

I have to wonder about your statment about the Celestron being more expensive
than the Meade.

Per OPT's web site the price of a 16" Meade ACF OTA only is:$9999 and the
Celestron Edge 14" is: $5799, so I don't understand this statement.

Kent

Ps: IMHO the ACF is great.  I have a 10" ACF and have viewed through a 14" Edge
at a star party at Palomar and was not impressed, I viewed thru a 16" ACF at the
same star party and it was much better.



>
> Re- telescopes I'm considering  either a 14" -16" Meade LX200 ACF or the
Celestron 14" edge  OTA only.
>
> The celstron being more expensive than the 16" Meade.  But the Meade has the
greater light gathering power and the new ACF may well perform well enough.
>

Thanks to those giving advice.

Gives me some ideas to think on.

Re the price difference between the celestron edge 14" series and the 16" ACF
Meads. Here in the UK I have found a price for the 16" cheaper. Though enquiring
about delivary times for the 16" the dealer adds the price stated might be an
old one and may need reviewing!

Cheers Eric

Hi Eric

If you already own a CCD camera (and cann't or don't want to buy a
new one), its always also worth to take a look at your best/average/
worst seeing conditions and how well the scope's FLs match the
unbinned and binned pixel sizes of the camera.

>> The celstron being more expensive than the 16" Meade.
>
> Per OPT's web site the price of a 16" Meade ACF OTA-only is:$9999
> and the Celestron Edge 14" is: $5799, so I don't understand this state-
> ment.

You probably meant the two 14" OTAs, right ?
The M14 LX200-ACF OTA is listed for $5499 at OPT which is less then
$5799. Not much less, but still less.

OPT offers beside the C14 EdgeHD (= optical design) StarBright XLT
(= coating) for $5799, also the older C14 XLT OTA for $4495 with FASTAR
option and for just $3790 without FASTAR option.

There is the "Larger is always better" rule of thumb (especially if one wants
to go for the very faint stuff). But there is also the "Dimishing return/profit"
rule of thumb.
The 16" is larger and heavier (68 vs 45 lbs) and might and probably will
therefore need a bigger and more expensive mount.
The price of the M16 LX200-ACF UHTC OTA is at OPT in the US:
~ 72% higher than the one of the C14 EdgeHD XLT
~ 82% higher than the one of the M14 LX200-ACF
~ 122% higher than the one of the C14 XLT Fastar
~ 164% higher than the one of the C14 XLT non-Fastar,
But the light gathering area is just ~ 30% higher. And the SNR is just
~ 14% higher.

Clear skies
  Wolfgang

--
Wolfgang Renz, Karlsruhe, Germany

Take it easy. You have to balance aperture size and image scale. In other words,
you should consider telescope and camera at the same time and decide at what
image scale you want to work.  Remember – oversampling reduces S/N and effective
aperture size. I would go with a conventional C14. There are many R/Cs available
for the C14. An R/C will increase the FOV and help you save money on a camera.
(A camera alone for the C14 EdgeHD might cost $10,000.) The Parmount MX is also
more desirable mount for photometry. It can go two hours past the meridian.

-Adam


--- In Exoplanet_Astronomers@yahoogroups.com, "Americo" <AmericoWatkins@...>
wrote:
>
> Thanks to those giving advice.
>
> Gives me some ideas to think on.
>
> Re the price difference between the celestron edge 14" series and the 16" ACF
Meads. Here in the UK I have found a price for the 16" cheaper. Though enquiring
about delivary times for the 16" the dealer adds the price stated might be an
old one and may need reviewing!
>
> Cheers Eric
>

Hi Folks;

I finally managed to capture the transit of CoRot-2B :

http://www.outcastsoft.com/AstroImages/Corot2b_20110828_MJA.png

, well half of it. The egress end of it got blocked off by the Condo wall, so I
only captured a bit after mid point.

There is another opportunity on September 4th which is a little earlier, so if
the turbulence is low enough I'll try again.

TTYL..

Milton Aupperle
http://www.outcastsoft.com/AstroImages/AstroIndex.html

Hi Folks;

My second attempt went better, but I clouded out 32 minutes before egress of the
transit:

http://www.outcastsoft.com/AstroImages/Corot2b_20110904_MJA.png

I'll have to wait until next year before trying again.

TTYL..

Milton Aupperle
http://www.outcastsoft.com/AstroImages/AstroIndex.html

I'm just ordering a Celestron C14 Edge which unlike the standard C14 has a lens
configuration within the baffle tube to improve optical performance.

Would this compremise the accuracy of the  photometry I wish to undertake.

Thanks Eric

Eric wrote:
I'm just ordering a Celestron C14 Edge which unlike the standard C14 has a lens
configuration within the baffle tube to improve optical performance.

Would this compremise the accuracy of the  photometry I wish to undertake.

Thanks Eric
-------------------------
The EdgeHD basically includes a field flattener that keeps focus across the
field of view.  This is usually a low-power lens that will have little effect on
your photometry.  Getting rid of the image distortion that comes with poor focus
is a good feature for your work, so I wouldn't get concerned.  Far more
important will be your technique.
Arne

Dear Friend of the AAVSO,

We are conducting a survey to learn more about the demographics of our
members, observers and anyone affiliated with or interested in the
AAVSO. The survey consists of 27 questions, but not all will apply to
you. We anticipate the survey will take about 15-20 minutes to
complete. When you have a moment, please fill out the survey - even if
you are not currently active in the AAVSO.

         https://www.surveymonkey.com/s/AAVSO_Demo

*ALL* questions are optional. If you feel uncomfortable answering a
question, feel free to skip it.

Information may be used for purposes such as making strategic
plans for the AAVSO, writing grant applications, planning observing
campaigns, writing articles about our membership, etc.

Identifiable survey data will never be shared with anyone outside of
the AAVSO.

A summary of the anonymous results will be published on the web site
in early 2012, presented at an AAVSO meeting and likely published in
the JAAVSO.

This survey will end on December 31, 2011 (we need time to mail and
process printed copies of the survey for our membership who are not
online). Please do not discuss it on the AAVSO Discussion Group or on
any public forum at this time because any such discussion may bias
results. However, feel free to discuss it anywhere you wish after
December 31.

Thank you for your time!

AAVSO HQ

Dear group,

Announced just last summer, HAT-P-19b in Andromeda is a low-mass Saturn-type
exoplanet with a low core mass and which orbits a K1 dwarf host star every four
days. The host star lies at a distance of 700 light-years away and time to
transit variations strongly suggest the presence of another orbiting exoplanet
as well.

For this evening's result taken in the presence of very high humidity and
freezing temperatures, please see
http://www.perseus.gr/Astro-Photometry-HAT-P-19-20111119.htm .

Anthony.

Dear group,

Announced just last summer (2010), HAT-P-20b is one of the most massive and
densest "hot Jupiter" finds to-date. Its host star is a member of a binary star
system lying 228 light-years away.

For a glimpse at last night's transit opportunity, please see
http://www.perseus.gr/Astro-Photometry-HAT-P-20-20111202.htm .

Anthony.

Dear group,

An opportunity last night to revisit WASP-12b in Auriga. This exoplanet requires
just over one day to completely orbit its host star. Due to its close proximity,
it is highly irradiated and is characterized with one of the highest surface
temperatures of any exoplanet find so far (2500 degrees Kelvin).

It is estimated that within 10 million years, this exoplanet will have been
devoured by its host star.

For last night's result, please see
http://www.perseus.gr/Astro-Photometry-WASP-12-20111203.htm . My conditions were
the worse encountered so far this winter with very high humidity, thin ground
level fog and poor seeing. The advanced phase of the moon also helped light up
the sky and which was magnified further by the fog.

An effort from earlier this year using a smaller aperture is available at
http://www.perseus.gr/Astro-Photometry-WASP-12-20110114.htm .

Anthony.

Impressive results Anthony.

Thanks for sharing..

Milton Aupperle
http://www.outcastsoft.com/AstroImages/AstroIndex.html

--- In Exoplanet_Astronomers@yahoogroups.com, "Anthony" <anthony@...> wrote:
>
> Dear group,
>
> An opportunity last night to revisit WASP-12b in Auriga. This exoplanet
requires just over one day to completely orbit its host star. Due to its close
proximity, it is highly irradiated and is characterized with one of the highest
surface temperatures of any exoplanet find so far (2500 degrees Kelvin).
>
> It is estimated that within 10 million years, this exoplanet will have been
devoured by its host star.
>
> For last night's result, please see
http://www.perseus.gr/Astro-Photometry-WASP-12-20111203.htm . My conditions were
the worse encountered so far this winter with very high humidity, thin ground
level fog and poor seeing. The advanced phase of the moon also helped light up
the sky and which was magnified further by the fog.
>
> An effort from earlier this year using a smaller aperture is available at
http://www.perseus.gr/Astro-Photometry-WASP-12-20110114.htm .
>
> Anthony.
>

Dear group,

Finally some clear skies following a month of incessant clouds and rains.

With the moon at a phase of 64% at the onset of darkness, there was little room
for DSO work. To this end, back to photometry involving HAT-P-25b in Aries and
whose discovery was announced in Aug/2010.

It is a lesser density hot-Jupiter and whose host star is one of the dimmer
exoplanet host stars discovered to date by a ground-based exoplanet hunting
team.

HAT-P-25b requires 3.65 days to completely orbit its G5 dwarf host star.

With the moon approximately 20 degrees further west, I had serious reservations
about getting a decent result and especially given the 13.19 magnitude of the
host star. However, all is well that ends well.

Anthony.

PS. A link to the result would be nice:
http://www.perseus.gr/Astro-Photometry-HAT-P-25-20120102.htm

--- In Exoplanet_Astronomers@yahoogroups.com, "Anthony" <anthony@...> wrote:
>
> Dear group,
>
> Finally some clear skies following a month of incessant clouds and rains.
>
> With the moon at a phase of 64% at the onset of darkness, there was little
room for DSO work. To this end, back to photometry involving HAT-P-25b in Aries
and whose discovery was announced in Aug/2010.
>
> It is a lesser density hot-Jupiter and whose host star is one of the dimmer
exoplanet host stars discovered to date by a ground-based exoplanet hunting
team.
>
> HAT-P-25b requires 3.65 days to completely orbit its G5 dwarf host star.
>
> With the moon approximately 20 degrees further west, I had serious
reservations about getting a decent result and especially given the 13.19
magnitude of the host star. However, all is well that ends well.
>
> Anthony.
>

 

PS. A link to the result would be nice: http://www.perseus.gr/Astro-Photometry-HAT-P-25-20120102.htm

--- In Exoplanet_Astronomers@yahoogroups.com, "Anthony" <anthony@...> wrote:
>
> Dear group,
>
> Finally some clear skies following a month of incessant clouds and rains.
>
> With the moon at a phase of 64% at the onset of darkness, there was little room for DSO work. To this end, back to photometry involving HAT-P-25b in Aries and whose discovery was announced in Aug/2010.
>
> It is a lesser density hot-Jupiter and whose host star is one of the dimmer exoplanet host stars discovered to date by a ground-based exoplanet hunting team.
>
> HAT-P-25b requires 3.65 days to completely orbit its G5 dwarf host star.
>
> With the moon approximately 20 degrees further west, I had serious reservations about getting a decent result and especially given the 13.19 magnitude of the host star. However, all is well that ends well.
>
> Anthony.
>

Thanks Shawn.

I had my doubts with the moon at 64% phase and approximately 20 degrees away but
it worked out nicely.  :-)

Anthony.

--- In Exoplanet_Astronomers@yahoogroups.com, Shawn Dvorak <sdvorak@...> wrote:
>
> Anthony,
>
> Another very nice result!  I've not tried HAT-P-25: at mag 13.2 I
> thought that it's a bit faint for my 25cm scope in my bright sky
> location but I see you got nice results with at 30cm even with the moon
> nearby.
>
> Shawn
>
>
> On 01/02/2012 07:51 PM, Anthony wrote:
> >
> > PS. A link to the result would be nice:
> > http://www.perseus.gr/Astro-Photometry-HAT-P-25-20120102.htm
> >
> > --- In Exoplanet_Astronomers@yahoogroups.com
> > <mailto:Exoplanet_Astronomers%40yahoogroups.com>, "Anthony"
> > <anthony@> wrote:
> > >
> > > Dear group,
> > >
> > > Finally some clear skies following a month of incessant clouds and
> > rains.
> > >
> > > With the moon at a phase of 64% at the onset of darkness, there was
> > little room for DSO work. To this end, back to photometry involving
> > HAT-P-25b in Aries and whose discovery was announced in Aug/2010.
> > >
> > > It is a lesser density hot-Jupiter and whose host star is one of the
> > dimmer exoplanet host stars discovered to date by a ground-based
> > exoplanet hunting team.
> > >
> > > HAT-P-25b requires 3.65 days to completely orbit its G5 dwarf host star.
> > >
> > > With the moon approximately 20 degrees further west, I had serious
> > reservations about getting a decent result and especially given the
> > 13.19 magnitude of the host star. However, all is well that ends well.
> > >
> > > Anthony.
> > >
> >
> >
>

Rochester News 2012-01-11

http://www.rochester.edu/news/show.php?id=3983

Scientists Discover a Saturn-like Ring System Eclipsing a Sun-like Star

Artist's conception of the new ring system in front of its host star:

Illustration Credit: Michael Osadciw/University of Rochester
http://www.rochester.edu/news/photos/hi_res/hi885.jpg
 

A team of astrophysicists from the University of Rochester and Europe has discovered a ring system in the constellation Centaurus that invites comparisons to Saturn.

The scientists, led by Assistant Professor of Physics and Astronomy Eric Mamajek of Rochester and the Cerro Tololo Inter-American Observatory, used data from the international SuperWASP (Wide Angle Search for Planets) and All Sky Automated Survey (ASAS) project to study the light curves of young Sun-like stars in the Scorpius-Centaurus association—the nearest region of recent massive star formation to the Sun.

The basic concept of the research is straightforward. Imagine yourself sitting in a park on a sunny afternoon and a softball passes between you and the sun. The intensity of light from the sun would appear to weaken for just a moment. Then a bird flies by, causing the intensity of the sunlight to again weaken—more or less than it did for the softball, depending on the size of the bird and how long it took to pass. That's the principle that allowed the researchers to discover a cosmic ring system.

A light curve is a graph of light intensity over time, and one star in particular showed dramatic changes during a 54 day period in early 2007. University of Rochester graduate student Mark Pecaut and Mamajek discovered the unusual eclipse in December 2010. "When I first saw the light curve, I knew we had found a very weird and unique object. After we ruled out the eclipse being due to a spherical star or a circumstellar disk passing in front of the star, I realized that the only plausible explanation was some sort of dust ring system orbiting a smaller companion—basically a 'Saturn on steroids,'" said Mamajek.

If a spherical object merely passed in front of the star, the intensity of the light would gradually dim and reach a low point before gradually increasing. That was not the case with the star identified as 1SWASP J140747.93-394542.6. The Rochester team discovered a long, deep, and complex eclipse event with significant on-and-off dimming. At the deepest parts of the eclipse, at least 95% of the light from the star was being blocked by dust.

The shape of the light curve was very similar to that of a well-researched star (EE Cephei), suggesting similar traits in the companion objects. However EE Cephei differs in that it appears to be a thick protoplanetary disk transiting—or passing—in front a massive, hot star. "We suspect this new star is being eclipsed by a low-mass object with an orbiting disk that has multiple thin rings of dust debris," said Mamajek. The star is similar in mass to the sun, but is much younger - about 16 million years old or 1/300th the age of the solar system - and it lies about 420 light years away.

The research was conducted by Mamajek, Associate Professor Alice Quillen, graduate student Mark Pecaut, graduate student Fred Moolekamp, and graduate student Erin Scott of Rochester; Assistant Professor Matthew Kenworthy of Leiden University in The Netherlands; and Professor Andrew Collier Cameron and postdoctoral research assistant Neil Parley of the University of St. Andrews in Scotland. Their findings will be published in an upcoming issue of the Astronomical Journal.

"This marks the first time astronomers have detected an extrasolar ring system transiting a Sun-like star, and the first system of discrete, thin, dust rings detected around a very low-mass object outside of our solar system," said Mamajek, "But many questions remain about what exactly has been discovered." He says the object at the center of the ring system is either a very low-mass star, brown dwarf, or planet. The answer lies in the object's mass.

In order to be a brown dwarf, the object would have to be between 13 M_J (Jupiter masses) and 75 M_J, insufficient to sustain the thermonuclear fusion reactions during its projected lifetime. If the object's mass is less than 13 M_J, it would likely be a planet, making it similar to Saturn whose rings have a similar optical depth.

Mamajek and colleagues will be proposing to use southern hemisphere telescopes to obtain radial velocity data for the star to detect the gravitational tug of the companion, and conduct non-redundant mask imaging experiments to try to detect light from the faint companion. The observations will help calculate the companion's mass, which, in turn, will help determine its identity.

Along with the central object, Mamajek is interested in what is taking place in the two pronounced gaps located between the rings. Gaps usually indicate the presence of objects with enough mass to gravitationally sculpt the ring edges, and Mamajek thinks his team could be either observing the late stages of planet formation if the transiting object is a star or brown dwarf, or possibly moon formation if the transiting object is a giant planet.

If the dusty rings are similar to Saturn's in terms of their mass per optical depth, then the total mass of the rings is only on the order of the mass of Earth's moon. The orbital radius of the outermost ring is tens of millions of kilometers, so the mass and size of the ring systems is substantially heftier than Saturn's ring system. In the discovery paper, the four rings detected thus far have been dubbed "Rochester", "Sutherland", "Campanas", and "Tololo" after the sites where the eclipsed star was first detected and analyzed.

With several questions still to answer, Mamajek considers the paper to be a progress report. He expects it will take at least a couple more years to piece everything together. However with future all-sky monitoring surveys like the proposed Large Synoptic Survey Telescope being built in Chile, Mamajek expects that rare eclipses of young stars by moon-forming disks and large ring systems around young giant planets will be detectable over many years of searching. "Follow up observations of such eclipses may provide our first observational constraints on the formation and early evolution of moons around gas giant planets."

http://adsabs.harvard.edu/abs/2011arXiv1108.4070M
http://arxiv.org/abs/1108.4070

Planetary Construction Zones in Occultation: Discovery of an Extrasolar Ring System Transiting a Young Sun-like Star and Future Prospects for Detecting Eclipses by Circumsecondary and Circumplanetary Disks
Mamajek, Eric E.; Quillen, Alice C.; Pecaut, Mark J.; Moolekamp, Fred; Scott, Erin L.; Kenworthy, Matthew A.; Collier Cameron, Andrew; Parley, Neil R.

The large relative sizes of circumstellar and circumplanetary disks imply that they might be seen in eclipse in stellar light curves. We estimate that a survey of ~10^4 young (~10 Myr old) post-accretion pre-MS stars monitored for ~10 years should yield at least a few deep eclipses from circumplanetary disks and disks surrounding low mass companion stars. We present photometric and spectroscopic data for a pre-MS K5 star (1SWASP J140747.93-394542.6), a newly discovered ~0.9 Msun member of the ~16 Myr-old Upper Cen-Lup subgroup of Sco-Cen at a kinematic distance of 128 pc. SuperWASP and ASAS light curves for this star show a remarkably long, deep, and complex eclipse event centered on 29 April 2007. At least 5 multi-day dimming events of >0.5 mag are identified, with a >3.3 mag deep eclipse bracketed by two pairs of ~1 mag eclipses symmetrically occurring +-12 days and +-26 days before and after. Hence, significant dimming of the star was taking place on and off over at least a ~54 day period in 2007, and a strong >1 mag dimming event occurred over a ~12 day span. We place a firm lower limit on the period of 850 days (i.e. the orbital radius of the eclipser must be >1.7 AU and orbital velocity must be <22 km/s). The shape of the light curve is similar to the lop-sided eclipses of the Be star EE Cep. We suspect that this new star is being eclipsed by a low-mass object orbited by a dense inner disk, girded by at least 3 dusty rings of lower optical depth. Between these rings are at least two annuli of near-zero optical depth (i.e. gaps), possibly cleared out by planets or moons, depending on the nature of the secondary. For possible periods in the range 2.33-200 yr, the estimated total ring mass is ~8-0.4 Mmoon (if the rings have optical opacity similar to Saturn's rings), and the edge of the outermost detected ring has orbital radius ~0.4-0.09 AU.

Hi Terrence;

Thanks for the info which looks like an interesting challenge.

Detecting a 0.03 to 0.06 Mag change is not terribly tough, as long as you have
16 bit low noise camera. I've done Exoplanets and Asteroids in this range on
several occasions (Budrosa or Corot-2B for example). And with a Mag 11
brightness, we can collect a lot of samples to reduce noise scatter even further
via averaging or median combines etc.

The problem is going to be how to on distinguish the light change due to
Kalliope's rotation ( period of 4.18 hours and changes of up to 0.6 magnitudes)
versus the the drop due to Linus (~ 2 hours event with drop of 0.03 to 0.06
magnitudes). You pretty much would need to image Kalliope multiple times this
month, especially before and after each event and hope the rotation aspects are
the same. I have seen many times asteroids whose brightness varies with each
rotation, especially ones with irregular shapes - like Devosa for example.

HTH..

Milton Aupperle
http://www.outcastsoft.com/AstroImages/AstroIndex.html

--- In Exoplanet_Astronomers@yahoogroups.com, Terrence Redding <tredding@...>
wrote:
>
> "In February 2012, the binary asteroid (22) Kalliope will reach one of its
annual equinoxes. As a consequence, the orbit plane of its small moon, Linus,
will be aligned closely to the Sun's line of sight, giving rise to a mutual
eclipse season. Such a favorable configuration occurs every 5 year.

Hi Terrence;

If your using Astro IIDC, either a Grasshopper 1 model (GRAS-14S5M) or a
Grasshopper 2 (GS2-FW-14S5M) model with the Sony ICX285 EXHad Mono CCD.

I'm working on adding support to Astro IIDC for the Grasshopper 2 camera to
utilize their low noise / lower temperature modes. In my 6+ month well below 0°C
ambient temperature, the Grasshopper 2 camera doesn't even require cooling.

TTYL..

Milton Aupperle

--- In Exoplanet_Astronomers@yahoogroups.com, Terrence Redding <tredding@...>
wrote:
>
> Milton,
>
> It is always interesting to speak with you. I don't believe I own a 16 bit
camera.  I do have a DSI Pro and a DFK 21AF04.AS.  I have been holding off
buying an exoplanet until I thought I had enough knowledge and skill to do some
exoplanet work.  What camera would you recommend?

FYI

Clear skies
  Wolfgang

--
Wolfgang Renz, Karlsruhe, Germany



----- Original Message -----
From: "Donn Starkey"
To: "'AAVSO-DIS'" <aavso-discussion@...>
Sent: Wednesday, February 15, 2012 4:55 AM
Subject: [AAVSO-DIS]

> I have been asked by Dr. J.D. Armstrong of the Univ of Hawaii, Institute
> for Astronomy to pass along the following announcement.
>
> He is coordinating a workshop on Maui in June entitled, "Transiting Planets
> in the House of the Sun:  A Workshop on M Dwarf Stars and Their Planets"
> The workshop runs from June 3 to June 6, 2012.  There is no fee for the
> workshop.
>
> Details are available at:
> http://www.soest.hawaii.edu/GG/FACULTY/GAIDOS/haleakala.html
>
> You may contact him directly if you have any questions:  jd@...
>
> +++++++++++++++++++++
> Donn Starkey
> www.starkey.ws
> AAVSO + CBA-Indiana
> MPC Code: H63