Tag: MAPS

We started the night with a group photo featuring the stars of the show: the 6.5-meter primary and our beloved ASM watching over us from directly above our heads. It’s a good thing Ruby, Dan and the MMT day-crew gang ensured its secure installation.

Bonus photo! Obligatory mirror selfie with the ASM, courtesy of Krishna. In retrospect, we raised our hands in victory too early, we didn’t yet know how the night would go.

We headed down to get work started and within the hour Grant, Oli and Maggie had aligned the dichroic. Amali’s judicious eye achieved us decent enough pupils that we could start looking for the culprit actuators keeping us from amazing pupils. Good progress so far!

But if there’s one thing I’ve learned on my handful of MAPS observing runs, it’s that the time equivalent of at least one night will be forced from our hands by adverse weather. This was to be our windy night, so around 7:30–a little over an hour after opening–we closed the telescope.

While we held out hope for the winds to wind down, Maggy, Oli and Grant kept us company. Manny found a floor heating pad to fight off the cold reaching up through the ground. Much to our dismay, however, a mouse had eaten through part of the power cable and after 7 glorious seconds of foot warming, the pad sparked and gave out. Thankfully, our boss was uninjured, our only misfortune being that our toes were none the warmer. Such is the price of commissioning magical mirrors.

Around 11 PM, Oli, Grant and Maggie called it a night and headed down the mountain. They made it back to Tucson safe, a testimony to our team’s spirit raging against the wind.

As we waged a war of attrition against the gusts, Amali trained Lauren and me to check how individual actuators respond to a “sweep” of current. 

Intermittently, Jorge kept our spirits up with Dad jokes, Manny made us popcorn, and Krishna read abstracts from the day’s arXiv feed aloud. (Yes, instead of doom-scrolling social media, Krishna scrolls through the latest astronomy and sometimes machine learning papers on the daily.)

Alas around 3 AM, the wind forecast pronounced we’d lost this battle and it was time to call it a night and head to bed.

WE INTERRUPT YOUR REGULARLY SCHEDULED PROGRAMMING TO BRING YOU THIS IMPORTANT MESSAGE: 

Krishna is looking to buy a car! If anyone is selling, any and all (legitimate and non-Craigslist-based) leads are greatly appreciated! He isn’t really picky so long as the vehicle is in good condition and runs nicely, but his top contenders are currently any model of the following makes:

• Ducati
• Kawasaki
• Indian
• Yamaha

Be present, enjoy nature

In keeping with Maggie’s blog rules, I give you a view of the MMT from the bowl dorms before heading up to the very same. Not only did this moment allow me to admire the mountain’s beauty, but it also made me wonder if the location of the bowl dorms along the winding road to the summit was determined by geography or by a thoughtful mountain road engineer who thought this vista would serve as the perfect inspiration for a night of hard work. Or, maybe some combination of the two.

Song of the Day

Before Jefferson Starship (“We Built This City”, “Nothing’s Gonna Stop Us Now”), there was Jefferson Airplane. The song of the day is Planes, by Jefferson Airplane:

The duality of nature is something I’ll never stop wondering at: my first post came to you on a night so action-packed, I felt incapable of writing every detail down. Last night, however, we didn’t leave lightning shutdown.

To bide the time in hopes of some sky-time, Amali guided me through the MAPS CACAO simulation; from starting up the server, deformable mirror and wavefront sensor, to closing the loop with 20 modes, 50 modes, and finally 100 modes. Hopefully this means we’ll be able to reach 100 modes on-sky!

Next, Lauren was shown the ways of simulated CACAO. It was comforting to know we wouldn’t break the ASM since this was only a simulation, and it was alright to push the mock-ASM to its limits and discover what not to do to the real deal. Apparently, completion of the simulation means I am now prepared to operate the AO system on-sky solo. But, I still feel like a tenuous sapling whose very existence/job/ASM is threatened by anything stronger than a mild breeze.

Amali’s pedagogy then dictated Lauren and I teach Parker how to operate the MAPS simulation. Thusly, we discovered the gaps in our learning and may have unintentionally confused Parker in the process but, he did succeed in reproducing a 20-mode loop. Maybe we didn’t do so bad after all? Our next step towards becoming strong AOaks is to write the simulation steps in our own words. Gee, it’s a good thing lab classes were a requirement for graduation; who would have thought writing reports was so important? (I jest, I jest)

The word of the night is Arizona. Talking to Yoav, I was reminded that not only does Steward Observatory and the University of Arizona contribute significantly to astronomy and humankind’s exploration of space; but so does every University in Arizona. We are strengthened by our inter-university collaboration, now more than ever. In this sense, I dare to say Arizona means ad astra per intellectum et cooperante–to the stars through understanding and collaboration.

Now, I would love to explain the majesty of the storm that kept us from opening, but words would not do it justice. So I’ll let the photography of our talented telescope operator, Brian Pinault, speak for me. Ever the diligent guardian of our invaluable tools, Brian captured this moment of volatile yet sublime nature while visually surveying the storm’s trajectory.

In honor of the storm, the song of the night is The Tempest, Op 18 by Pyotr Ilyich Tchaikovsky.

I’d like to add a bonus to tonight’s post. If you don’t already listen to Ologies, the science podcast by Alie Ward, then you are missing out. Let me present to you one of you new favorite listening experiences with the episode on Fulminology, the Study of Lightning. Check it out, or your chances of being struck by lightning may increase! (again I jest, I jest)

Howdy! I’m Bianca; formally I am research staff for CAAO, but you may have heard of me as one of the padawans under the tutelage of AO Jedi Knight Amali Vaz.

This is my 5th MAPS observing run and my first blog post! Last night was the most action-packed night I’ve yet to experience, so let’s start at the beginning.

This night we were joined by Jared Males and first-year grad student, Parker.
6 pm found us preparing for the night’s activities. The clouds got the opening time memo a few hours later, but they couldn’t stop us from being productive!

Andrew bestowed upon us Version 2.0.5 of mapspyindi2, which fixes crashing GUIs and optimizes setting the state of the ASM.

Amali and Lauren (my fellow padawan) began latency measurements round 2 electric boogaloo with new tuning parameters, courtesy of Jess.

Jared gave Parker the grand tour of the MMT and the run-down on MAPS.

Yoav hit a snowbank with the MIRAC detector: it was significantly below the recommended operating temperature due to the previous night’s efforts to cool the detector followed by a day without the heater on. Yoav led Lauren and I in detector-warming efforts for ~ 3 hours, estimating it would take 2+ days to reach our necessary temperature unless we could raise the power being sent to the heater by ~100%. Proving his multi-faceted savvy, Yoav introduced those of us less versed in memes to our word of the day- Cowabummer.

I’ll let this meme demonstrate it’s proper usage:

Jarron saved the science day by instructing us to bypass the PID loop and send “UNLIMITED POWER!!!” (well, 100% but I’ve heard it both ways) to the heater.

Once the detector reached the optimal temperature, Yoav came in with the assist for Mara, a fellow ASU grad student, by taking data she needs for her thesis. Later, a closed-loop 50-mode K-band MIRAC PSF was also attained!

MIRAC-BLINC temperature crisis resolved and the clouds having sufficiently departed, we switched gears to alignment and pinned down the order in which to move the 2 periscopes and move the telescope to have the star simultaneously in focus on the acquisition camera, entirely visible on the pupil imager with nominal vignetting, and centered on the pyramid. After the previous runs’ hard work and inevitable frustration that alignment was never quite right, the successful alignment was a small but significant accomplishment.

CACAO time! We set to collecting as many 50-mode response matrices as possible but temperature issues now decided to make the ASM its new target: and boy did she feel the heat. We alternated between taking 2 response matrices, followed by cooling the ASM for ~10 minutes until the sun commanded we cease.

The song of the night is ACDC’s “You Shook Me All Night Long”, because that’s exactly what we did to the ASM.