MagAO-X 2022A Day 23: Feeling Remote

Late last year, we surveyed the Magellan community about what was lost and what was gained from remote observing. 10/28 people who had used a new instrument during remote observing cited a downside as the difficulty learning to use a new instrument. Obviously, MagAO-X wasn’t on during the 14 months of remote observing to that point. I have to wonder if the other 18 people all used a single-object-medium-resolution-visual spectrograph with few choices, … but I digress.

I assert that difficulty in learning to use MagAO-X is a major downside of remote observing. Now, MagAO-X is an experiment not a facility, so it’s not really fair to compare it to the facility instruments. But I’m used to at least having a goal of observational self-sufficiency. Alas, self-sufficiency is remote. So to speak.

I love observing. I love experiments. I am deeply grateful to the MagAO-X team who has been at LCO for the better part of a month and are still willing to collaborate to try some difficult observations with me. I hope I’ll be able to join them in person later this year (and not just because I’m jealous of their empanadas — surprisingly, in that observing survey, only 93/150 respondents chose “Delicious Empanadas” as a benefit to in-person observing. I can only assume that the other 57 are crazy ascetics who survive only on soylent).

My remote observing station in my home office. I notice that I am probably drinking too much coffee. The desktop, if visible, would show lovely images of LCO at night.

So for the song of the day, here are some appropriate lyrics from an appropriately  named song on an appropriately named album (Confusion on Electric Light Orchestra’s Discovery album).

Every night you’re out there, darlin’
You’re always out there runnin’
And I see that lost look in your eyes

Confusion

don’t know what I should do
Confusion
I leave it all up to you

Aside question to ponder: I bet everyone reading this can name more famous astronomers than ELO members. I have actually met one former guitarist/vocalist of ELO Part II whose daughter goes to school with my son, but I really only remember his name because he made it a famous building in Athens. Fame is in the eye of the beholder.

MagAO-X 2022A Day 22: A Hole Thing

Today we got up early (3:00 P.M.) for a tour of the Giant Magellan Telescope construction site, arranged by our fearless leader.

We met with architect Francisco Figueroa at the site, who was happy to show us around—as soon as we put on vests, hard hats, gloves, safety glasses, a high-visibility safety vest, and safety-toe boots. (We had foolishly left ours on the other mountaintop, but fortunately they had a whole closet full of brand-new safety-toe boots.)

Thanks to The Covid-19 Situation and These Unprecedented Times (and their friends Supply Chain Disruption and Financial Constraints), work has been stopped for a couple of years. This meant that the main thing to see was a hole, soon(ish) to be filled with a concrete giant telescope pier.

It was windy as heck up there.

After another delicious dinner, we went up to the Magellan Clay telescope to begin operations. It was still pretty windy… and seeing wasn’t great… so we listened to Magellan sing in the wind.

Listen closely for its song.

Our observer this evening, Dr. Alycia Weinberger, is a good sport, and was happy to hang out on Zoom with us even though we couldn’t get locked on to her target just yet.

After a while, we did get back on target, and Jared experimented with ways to push MagAO-X in poor seeing conditions. We can’t reach our most demanding performance targets, but we were pleasantly surprised by our performance in these challenging conditions (in these unprecedented times).

Even though we did not get our 0.4″ seeing (who do we talk to about a refund?), we were able to have some fun. For example, we were served butts for our night lunch sandwiches. (Perhaps tomorrow we’ll have grilled eggplants and peaches for dessert.)

Graduate Student Logan Pearce overcome by emotion at the sight of the sandwich.

As I write this Alberto, our telescope operator, has just asked us if pointing into 30 MPH winds is okay. Veterans of MagAO will recall that suspending a complex instrument over the primary led to some paranoia over wind speeds. Fortunately, MagAO-X is in no danger of being blown off the telescope.

Carlos Culpeo couldn’t make it but at least he’s zooming in.

The P.I. made a great discovery tonight! He just discovered that we have an extra night of telescope time (going by the official schedule), totally overturning the previous scientific consensus on which day we’re moving our instrument off the telescope. Stay tuned for the Nature paper.

Song of the Day

A recent Tucson Sentinel music column highlighted new music by a Tucson local band named Annie Jump Cannon, which I felt compelled to check out.

If you’re not familiar, their namesake was the first person to figure out a sensible classification scheme for stellar spectra, at a time when women were not offered the same opportunities in science as men. (We still use her classification scheme today.)

The band, as far as I can tell, has no professional astronomers in it. (Phew.) In possibly related news, the song’s pretty good too.

“Strawberry Fiona” by Annie Jump Cannon

MagAO-X 2022A Day 21: It was bound to happen eventually.

Whelp, here we are. After 20 days of the most excellent weather and 9 nights of impeccable seeing (last night was truly remarkable observing conditions!) we have finally hit a night with some clouds. We spent some time on a target for one of our collaborators and got her some good data, but as I write this (nearing midnight) the dome is closed and we are switching to the lab light source to do some engineering.

Here is a gif of the all-sky camera for about 10 mins, so you can see what we’re lookin’ at:

The LCO weather map showing clouds rolling in over our little red dot.

So MagAO-X got some engineering time and we took a sci-fi break thanks to Joseph’s projector he brought.

Featuring the incomparable Thomas Jane as Miller in S1 of the Expanse
Hernan the telescope operator joins us for some Expanse.
Jared says: “Photo capturing that the Grand-PI, PI, and Uncle Sagan Fellow are in the control room working while the grad students and T.O. watch a movie in the lounge.  #clouds #lifeatlco”
Jared gets a pic of the closed telescope with all the clouds.

So in lieu of data, I present to you, for no particular reason, viscachas as sad celebrities.


In honor of the peaches in syrup they like to serve for dessert here, which is delicious, the song of the day in Peaches by Presidents of the United States of America.

MagAO-X 2022A Day 20: Excellent Seeing and Science

So today was day 9/14 of our on-sky run on the Clay telescope and it was a particularly awesome night! The seeing (how astronomers quantify the turbulence in the atmosphere) was very good all night. A great Easter Sunday treat (as were all the delicious empanadas).

A perfect night, excellent conditions all night long

The AO system ran very well tonight. We were able to stay locked for hours making excellent images– without really any attention being paid to the AO system once she was locked. This is an excellent sign that most of the difficult system of nested loops of MagAO-X are all now well understood and the hard work of everyone is really paying off!

There was also great science being done by Sebastiaan Haffert who was able to quickly (in 15min) detect the brown dwarf companion PZ Tel in a recent dataset (with cold -55C cameras this time). See below for his quick reduction of the brown dwarf companion:

The brown dwarf companion (at 10 o’clock) PZ Tel at Halpha (0.6563 microns), by Sebastiaan Haffert

We also looked for some protoplanets at Halpha (where young planets glow as they gather hydrogen gas onto their surfaces). We took data with our friends and collaborators at the University Michigan. And graduate student Logan Pearce made an exciting discovery!

Earlier today Jared took some great photos of the MagAO-X instrument on the platform at the Clay telescope

MagAO-X enjoying some rare sunshine through the open slit of Clay (Baade Telescope in background) photo by Jared Males

What probably got the most attention was the discovery that there are 3 culpeos (foxes) living at the observatory with us.

What a cute little face!

Readers of the blog will know that these little guys are very playful as can be seen from Joseph’s video below:

Song of the day

Well this night has been amazing and MagAOX has blinded us with her science (and laser sharp images), so that kind of leads to this song of the day:

MagAO-X 2022A Day 19: MAPS & SCExAO to the rescue

MagAO-X is proving to be a complicated beast. Just when we think we’re making progress at taming it, we find another thing that doesn’t quite work yet — or is just plain failing.

Sometimes we need help from our collaborators working on similar AO systems. We’ve been getting really nice performance, but with a touch of instability that has made it difficult to keep that performance for long periods of time. We use the CACAO software developed by Olivier Guyon for the SCExAO system. Olivier has been working with us all along to make MagAO-X go fast, and today I got up early to dive into the details to figure out what has been causing these subtle stability issues.

To test things out, Olivier was running experiments on SCExAO in Hawaii while I was doing the same on MagAO-X. It looks like we succeeded! We are much happier with the new calibrations we took this afternoon.

MagAO-X (blueish grey) and SCExAO (orange and purple) working together. Olivier can be seen thinking hard.

The bigger assist came from our friends on the MAPS project. We’ve been suffering from a failing rotator on our atmospheric dispersion corrector (ADC). This little motorized device rotates a prism to keep the Earth’s atmosphere from going all rainbow on us.

Knowing that MAPS is using the same rotator — and importantly are not currently looking up at stars — we sent up the ole’ bat signal to see if they could get one to us. Oli Durney (who is the optical engineer for MagAO-X!) sprang into action and tore apart MAPS’ ADC and got the stage to FedEx. From there it went to Jeb Bailey in Santa Barbara, who just happened to be coming to LCO 48 hours later. (Jeb is himself part of the MagAO-X team, though that’s not why he came this time).

So we got the replacement stage delivered last night, and today did the replacement.

The ADCs are a little hard to get to when we’re installed on Clay.
Laird and Jared cutting zip-ties to remove the cable.
Laird calmly considering the problem.
There is just no good way to get to this part of MagAO-X at the telescope, but we managed.

Once we got the instrument buttoned back up and our new calibration applied, we went back to work doing coronagraphy at H-alpha looking for planets.

Joseph driving MagAO-X in SDI coronagraphic mode. Laird and Sebastiaan providing helpful suggestions.

Here’s a video of some parts of MagAO-X working. Woofer, tweeter, WFS at top left. At bottom and from left are the H-alpha channel, continuum channel, and then our LOWFS camera which is capturing light rejected by the coronagraph.

A short period of MagAO-X observations.

Logan figured out how to get Vizcachas to be our substitute Easter Bunnies. they’re going great.

Joseph got a special meal. He claims to not know why. I was jealous.
Two culpeos watched us eat supper.
The traditional sunset pic.