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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:

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

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

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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.

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).

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:

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

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

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 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.

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.

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.

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.

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

It is quite a late morning while I am writing this blog post. We had a very successful first night of commissioning of VIS-X. VIS-X is the Visible Integral-field Spectrograph eXtreme (VIS-X). Of course everything we do is extreme. So the spectrograph also had to be extreme. VIS-X is the project that I have been working on in the last two years. Its goal is to take spectra of exoplanets and use that to characterize what’s in them (of course everyone wants to search for signs of life ;-)). After multiple day of aligning, I finally was able to get everything up and running. And we were able to use VIS-X on-sky!

One of the challenges with VIS-X is the acquisition on-sky. MagAO-X already has a small field of view of a couple arcseconds and, the field of view of VIS-X is even smaller! We can only see things with 0.55 arcseconds, that’s about 1/7000th of a degree.

The first multi-spectral images of VIS-X + MagAO-X. The colors correspond to the wavelength range of 450 nm (blue, left) to 950 nm (red,right). The next few night will be very exciting when we will try VIS-X on more challenging targets.

Using new instruments and observing is always exciting. However, sometimes observing is just a lot of waiting and it can be very tiring. Everyone deals with that in their own way.

VIS-X has two different observing modes. A low spectral resolution mode and a high spectral resolution mode. We did the commissioning of the low-res mode last night and to switch to high-res, I have been aligning after a full night of observing. My current feelings are well captured by this dutch song of today.

It finally feels like we’re starting to settle in here. We have begun doing hours-long observations of science targets for observers, and that means we can actually take a breath, catch up on email, and bond with our friends at LCO.

While having our dinner we were graced by our friend the Burro who likes pets.

Sebastiaan had to negotiate passage to dinner.

And Logan got her first nose scritches in.

Sebastiaan then had to pay the toll to get by.

And Avalon made friends too.

Our telescope operator Hernán Nuñez ( a hero of MagAO runs past ) told us that he thinks these guys have basically been abandon up here for a couple of years. This one, at least, clearly trusts and even likes humans, so it doesn’t seem like they’ve been wild their whole lives. Our friend might be a little lonely.

After our fun dinner party with the Burro, I walked up to the telescope for the first time since we went on sky. On the way up I saw our friend Povilas — It’s great catching up with old friends after such a long absence.

The night started with some VIS-X work by Sebastiaan.

Where’s Sebastiaan? He’s in this photo working on MagAO-X.

We started work on a nice bright star, part of Logan’s program. This was a great chance to put our high-speed low-drag coronagraphic mode to work. In the below image you can see the usual MagAO-X control panels. The lower right desktop shows the simultaneous images with a coronagraph disk occulting the star so we can look for companions. The 4 spots forming a cross are made by our deformable mirror as fiducials for alignment and photometry. The right-most image is our “low order wavefront sensor” camera, which is imaging light reflected from the coronagraph mask (the thing making the dark spot in the center of the other two images). We use that light to keep the spot centered at high speed (in this case 600 Hz). Fully understanding and optimizing this mode of observing is the key to my main science goal for MagAO-X, so it’s really exciting to see us getting started on it with a real star.

Here’s a close up view. Here the “satellite speckles” have green lines drawn between them, and the coronagraph is centered on the cross.

While we worked inside on our tiny little field of view, the great big outside sky was putting on quite a show:

In the desert. A horse with no name. I can still remember my name. But the day of the week is already gone.