Tag: 2025A

Today the honour of blogging is all mine (Matthijs). A few of us went up before dinner to start preparing for a busy night full of experimental engineering observations (in particular Sebastiaan after he had stayed up until 10.30am to align VisX again). During daylight we of course managed to enjoy the company of some of the cute critters around here.

Sebastiaan started out the night with some observations of Betelgeuse, until it got too low and the ADCs which we only noticed because of our most underrated camera (which deserves more praise). After that, Elena spent some time looking at the self coherent camera (SCC) imaging.

During this observing run Sebastiaan and Josh have attempted multiple times to use EFC for some deep dark hole observations of Alpha Centauri (in order to please Jared). These observations have been tarnished by bad seeing, bad calibrations, fluctuations in the laser power and alignment issues. Here’s an impression of what that did to Sebastiaan:

However, today was the day that all the stars aligned, good seeing, good calibration, good alignment (scripts) and it finally worked.

Eden has been looking at some donuts all week (no one knows why) but she’s finally figured out to turn these donuts into some (possibly) correct Strehl estimates (camtip FTW).

Myself, I interjected myself between some observations just to try out my semi-analytical FLOWFS control loop (of which I forgot to take a picture…).

Elena also managed to get some pretty PIAA observations.

In conclusion, we are doing great and if I had to summarise it in a movie quote I would say: “Desert power” – Dune 2021 .

Song of the Day

Someone mentioned potentially observing a target with 1612 in the name (or I might have imagined it) but this song has been stuck in my head all night. Enjoy!

Tonight was another Laird night which means more of our favorite target, PDS 70!

Could PDS 70 have alien life? Will we find a new planet? Are the answers to these questions always ‘no’?

Who’s to say.

We will get back to the PDS 70 excitement shortly, but first, a recap of the day’s festivities:

Sebastiaan and Elena got the FAST-SCC (self-coherent camera) working in lab! In the FAST-SCC, a coronagraph yeets light through a pinhole in the Lyot stop. This spatially filtered light interferes with residual stellar speckles, creating a fringe pattern in the focal plane from which the wavefront can be recovered. With our wavefront measurement, we can diggy diggy a dark hole.

Meanwhile, Katie and I hiked out to the solar telescope, and we also saw a burro.

Following a brief interlude, we have returned to the scene of PDS 70. While Logan may have left us, the good seeing that typically follows her decided to stick around.

“How could this be?” You ask.

Enter…Stewart.

With Stewart’s steady hand, we got some of the best seeing of our entire run!

Our night also featured a beautiful moon.

Having reached the epic conclusion of this blog post, I am ready to go to bed. “The midnight hour is passed and my attendants have all retired.” I recently watched the 2024 remake of Nosferatu, and it was difficult to find an appropriate quote for this blog post.

Song of the Day

Dancing in the Moonlight – King Harvest

We are happy to report the successful and uneventful homecomings of the first half of our observing crew. Uneventful in that none was stranded in a city they didn’t mean to be in. Successful in that they ended in the warm embraces of various roommate species.

For the half of us who remain, the weather has been treating us. Poorly. Has us saying “”If What I Think Is Happening, Is Happening, It Better Not Be.”

So we did not have an alfCen kind of night. We had a “give it your best shot” engineering kind of night. Which stretched until we had to switch to our observer’s time. You’re welcome for the good seeing Gabrielle, Jialin ordered it just for you.

Our engineering is humming merrily along. Sebastiaan and Josh started the night with dark hole digging. Matthijs LOWFS’ed. Katie successfully wrangled dispersed speckles. Jared’s gain optimization is a huge hit. I’m enjoying my donuts. We’re as happy as we can be with seeing at an all time high.

Speaking of happy… a quick ode to the vegetarian cooking of our Chef’s this turno. Thank you for the beautiful meat free meals! For those of us up at lunch Sunday there was even a vegan empanada, eaten too quickly for the camera to catch. We have been absolutely spoiled.

The quote of today was inspired by the main characters of the Lodge, our very own fantastic foxes, our charming culpeos.

Keep an eye out for a sweet message from our TO Ivonne, who agreed to do a little blog on her last day. Thank you Ivonne!

Song of the Day

Yeah the song and the quote is gonna be from the same movie. It’s a good movie.

I have an unfortunate secret to reveal: we have been operating MagAO-X in 2024B mode this whole time.

When the team first arrived, a wizened mystic emerged from the Room Behind the Kitchens and croaked out a prophecy:

Hasta que enstiques el instrumento tendras visión astronómica de baja calidad.

Unfortunately, nobody in the advance guard understood Spanish. Indeed, it was only in the post-mortem retrospective of this operational anomaly that the prophecy was even mentioned.

With the aid of hypnosis-based memory retrieval techniques and a team of Spanish-to-English translators, we were able to decipher the above as:

Until you ensticken the instrument, you will have poor quality seeing

This is a curse most dire to wish upon an astronomer, as it means their starlight will go every which way (instead of down into the pixels where it belongs). Fortunately, the mystic provided the remedy as well: ensticken the instrument.

The ritual had been delayed out of deference to our patch designer, Dr. Logan Pearce of the University of Michigan, who was not present for our first on-sky nights. Indeed, it was only performed today, on her—and my—last night on the mountain.

At sunset, we ascended to the East platform and watched Logan ensticken.

The results speak for themselves:

Yesterday, we were bumping up against the high-wind-shutdown speed limit until sunrise. We were looking at the wind speed graph saying “wow, that escalated quickly!” Today, the atmosphere has been much better-behaved.

We used the time to revisit some old favorites for Alycia and Sebastiaan. Alycia has already left, so Logan was pinch-hitting this evening. To image debris disks, reference star data is more useful than getting more sky rotation. Unfortunately, getting contemporaneous reference star data is impossible with an extreme AO instrument: you can’t lock on two stars at once.

This means a lot of switching back and forth to collect data on both the target and reference (i.e. star-hopping). Loud cheering erupted from the control room when they got the target-switching overhead under two minutes. This means our operators are top notch, naturally, but also that Alycia chose really good reference stars.

The latter part of the night was devoted to VIS-Xing. By dispersing the light in each spaxel (spectral pixel), VIS-X enables spectral differential imaging with many samples in wavelength space. On the other hand, when we perform SDI with MagAO-X’s main science cameras, we have only two different wavelengths to work with. Looking forward to seeing what Sebastiaan pulls out of this dataset! (PDS 70 d? …e?)

This afternoon, telescope operator Jorge Araya kindly showed us the Baade 6.5-meter telescope mirror. (“It’s a lot like the other one.” — Jorge)

I’ve seen it before, but somehow this never gets old.

I’m headed out this afternoon for another fun day or two of sitting in airports and airplanes as I head back to New York. The science continues without me, with seven more whole nights of MagAO-X-ing to go. I’m sure I’ll be kept in the loop, though—by daily blog posts, if nothing else. ¡Hasta pronto!

Frivolity interlude

The P.I.’s imagination was recently captured by the idea of walk-up music for AO operators. After I added Maggie-O-X to the instrument, it gained the ability to speak on command. It’s a small jump from that to playing arbitrary audio clips.

As of today, when the operator and observer are selected in the MagAO-X web interface, the appropriate walk-up song will play in the control room.

(Note 1: while the clips approved for control room use are G-rated, the full songs are not necessarily “Song of the Day” material. Note 2: Some songs were chosen, others assigned.)

• Jared Males — Ænema by Tool
• Laird Close — All Star by Smashmouth
• Logan Pearce — Skibidi by Little Big (no relation)
• Elena Tonucci — Pesca la tua Carta Sakura from the Italian dub of Cardcaptor Sakura
• Sebastiaan Haffert — Voodoo Mon Amour by Diablo Swing Orchestra
• Katie Twitchell — Careless Whisper by George Michael
• Eden McEwen — Planetarium by Slothrust
• Josh Liberman — Lip Gloss by Lil Mama
• Joseph Long — Seven Nation Army by The White Stripes

In an effort to motivate deeper understanding of the instrument software, the P.I. has declared that future walk-up song additions must be done and deployed by the party concerned. Godspeed, git users.

Song of the Day

Honestly, this was already Day of the Songs, but what’s one more between friends?