Looking Ahead

Earlier this month the 2011B observing schedule for the 200-inch Hale Telescope was announced. The astronomers who applied for time in early April finally found out if and when they will be coming to Palomar from August through January.

I thought that the readers of Palomar Skies might like summary of the projects coming our way this fall, so here goes.

Photo by Iair Arcavi.

Transients are all the rage and 13 nights, spread out across the months, will be devoted to following up on objects discovered with the Palomar Transient Factory survey. An additional four nights will be devoted to doing similar work, but for transients discovered via the Catalina Real-Time Transient Survey. Both of these programs will primarily use our visible light spectrograph to identify the type of transients discovered. One other night will specifically devoted to a particular type of supernova known as a Type Ia.

The other big item on the agenda for 2011B is the study of exoplanets. Some of this is follow-up work from the Kepler mission. 14 nights are devoted to various studies on Kepler exoplanets or their host stars. Much of this is visible or near infrared spectroscopy, but some of it also makes use of our newly souped-up adaptive optics system known as PALM-3000. This high-resolution imaging system will be used 12 nights to study and hunt for exoplanets and planet-forming disks of debris located around young stars. Using instruments other than the AO system, two nights will be used to study some of these disks discovered by the WISE mission and another two to study some “hot Jupiters” as they are seen to transit their host stars. All together that comes to 30 nights of exoplanets in 2011B or 1/6th of the telescope time.

Speaking of planets and things that orbit a star, worlds of our own solar system are a subject of study too. This includes studies of asteroids (8 nights), the Galilean moons of Jupiter (1), the irregular satellites of the outer planets (2), the atmosphere of Uranus (1), and the frozen world located beyond Neptune in the Kuiper Belt (2).

Looking a little further out, 12 nights will be devoted to studying brown dwarfs, so called “failed stars” – objects that are more massive than a planet but not massive enough to sustain nuclear fusion the way that stars do. Many of the objects to be observed were first discovered by the WISE mission.

Lots of stellar astrophysics will be going on as our astronomers study star formation (3), young stars and protostars (4), young variable stars, novae (4), white dwarfs (2), x-ray binary systems (1). The presence of dark matter in our own galaxy will be mapped via studies of the motions of RR Lyrae type variable stars that are part of the Pisces tidal stream (3).

Photo by Iair Arcavi.

Looking beyond our galaxy is still a big part of science at Palomar. In fact, aside from engineering time, it comprises the rest of the time on the schedule. Massive stars and the chemistry of the stars in M31 (aka the Andromeda Galaxy), our nearest big galaxy, will be the subject of study for 8 nights. Included on the list are blue compact dwarf galaxies (2), massive elliptical galaxies (5), hyperluminous galaxies (1), low-luminosity star-forming galaxies (5), galaxies known as Lyman-alpha emitters (7), luminous infrared galaxies (7), and galaxy clusters (6). Five nights will be directed toward the evolution of galaxies and six nights will be devoted toward using the Cosmic Web Imager instrument to map out the presence of gas located between galaxies.

Supermassive black holes, which lie at the core of quasars and various galaxies with active galactic nuclei are to be studied for six nights, while quasars themselves are studied another seven nights. The environment in and around another type of active galaxy – radio galaxies— is to be studied for five nights.

It takes time to keep the telescope & its instrumentation in tip-top shape. Seven nights will be lost because we will be re-aluminizing the 200-inch mirror in October. An additional twelve nights will be spent on engineering various scientific cameras, mostly related to our new PALM-3000 adaptive optics system. Two of those nights will be a demonstration of a new instrument known as ARCONS – the ARray Camera for Optical to Near-IR Spectrophotometry. It is likely that there will be science observations on a good fraction of these “engineering” nights.

Finally, we will be closed to astronomy and engineering December 24 & 25 for our only two holidays of the year.

There is the summary of what we will be looking at from August through January. Hopefully I didn't miss anything.

Zooming in on PALM-3000

Here are three photos that show off the PALM-3000 adaptive-optics system.

The first is a wide shot of the 200-inch Hale Telescope:

In this view the only easily noticeable changes to the telescope are the hoses and cables hanging from the telescope's south side. The instrument itself is housed in the telescope's Cassegrain cage and can be seen in this wide-angle photo:

The photo gives a feel for some of the complexity of the system through the number of cables visible, but there is much more that the image does not capture. At the heart of the system is the new 3388 actuator higher order deformable mirror. Here you can see the back end of it here:

The weather has not been favorable for the first two nights of commissioning the instrument. The forecast for tonight looks good. Let's hope that the weather cooperates as tonight is the third and final night for this observing run. On Saturday the instrument comes off the telescope until their next observing run in June.

Another Look at Installing PALM-3000

Here is another time-lapse movie of yesterday's installation of the PALM-3000 adaptive optics system onto the 200-inch Hale Telescope. This is shorter, covers less time, but is closer to the action as was shot with a digital SLR from on the observing floor.

Installing PALM-3000

Yesterday, the new upgrade to our adaptive-optics system, the PALM-3000, was first installed on the Hale Telescope. The webcam in the dome of the 200-inch telescope is currently offline to the outside world (sorry about that), but we were able to use it to capture images of the work taking place.

Here is almost 12 hours of work, compressed into just under 4 minutes

How did the first night go? Fog and drizzle kept the dome from opening. Thankfully, the weather is improving as the team has two more nights on this observing run, before the the instrument is used again in June.

More pictures and another video will follow as soon as things get put together.

Coming Soon: PALM-3000

Much of the behind-the-scenes work at Palomar Observatory lately has been directed toward supporting the upgrades for our new adaptive optics-system, known as PALM-3000. When fully functional, the system is expected to be the first of its kind and allow ground-based astronomers to get their clearest view yet in the visible portion of the spectrum (all other systems currently operate in the near infrared portion of the spectrum).

We had the final components for the system delivered to the dome of the Hale Telescope today.

These may look like just a bunch of crates, but inside are the final components that will be installed to bring this system alive.

More on this amazing system, which is expected to achieve "first light" later this month, will be posted here over the next few weeks, but in the meantime feel free to read this article on the systems new deformable mirror.

PALM-3000 Compoents Arrive

It is always nice when new things come to the observatory. Today the components for the new PALM-3000 upgrade to our adaptive optics system were delivered to the dome of the Hale Telescope.
The PALM-3000 team now has a good four months of work to complete on the system which is currently expected to see first light in February 2011.


For more information you can read an article here on the PALM-3000's new deformable mirror.