HPF observations have played a key role in another recent publication, this time discovering and verifying two hot Jupiter planets around K stars (Wendelstein-1b and Wendelstein-2b). The full article is available here:
The HPF team recently had another publication accepted describing the amazing complexities involved in separating star spots from planets. Their herculean efforts are described on this blog post and in their publication, both linked below:
Eternal spotshine of the spinning red suns
The HPF Team’s blog has a new post describing how they are characterizing an exoplanet’s atmospheric chemistry! It’s very cool stuff, available here:
Measuring Exoplanet Atmospheres with HPF
This week the VIRUS spectrograph reached another milestone with 70 active units on sky. Below is a reconstructed/magnified image of one observation (the units actually have gaps between them but are shown magnified here). White squares show the locations for 8 remaining units.
Each dithered VIRUS observation now contains 31,000 spectra covering 46 square arcminutes. Next stop: the full 78 units!
After the our Iron-Argon (FeAR) lamp started showing significantly reduced flux, on April 6th our team replaced the bulb in our Facility Calibration Unit (which rides along on the tracker, supplying continuum and line lamps for all the instruments). The new FeAr lamp is back to full brightness and provides excellent narrow emissions lines for our wavelength solutions on the Low Resolution Spectrograph #2.
The old bulb (left) looks quite dark and cloudy compared to the new one (right):
In response to COVID-19, the HET operations team has been rapidly developing our remote observing capabilities. At present, the night observations are staffed by one telescope operator on site and a remotely-connected resident astronomer (staying at home). Our afternoon operations shift is also being staffed remotely (one remote TO and one remote RA), requiring about 20-30 minutes of assistance from one member of day staff on site for our routine safety checks. Some day time staff are able to work partially or fully remotely from home, but most are still coming in daily as their duties cannot be done over a remote connection. Extra attention is being paid to hygiene, cleanliness, and staff presence each day. To further minimize risk, we have temporarily suspended our schedule of primary mirror segment swaps, as that process requires two members of the mirror team working in very close proximity with each other. We are benefiting from a lot of “can-do” attitudes here and receiving extensive help from our software team to get remote access and learning a lot in this process! After this is all over, I expect we’ll see long-term benefits from the things we have learned throughout this interesting time.
After the QTH lamp burned out last week, our team replaced the bulb in our Facility Calibration Unit (which rides along on the tracker, supplying continuum and line lamps for all the instruments). The new QTH lamp is ~30-40% brighter than the old one and looks like an excellent continuum source!
This advertisement was posted on February 17th 2020, and applications received by March 31st will be fully considered.
The University of Texas at Austin, McDonald Observatory invites applications for a Resident Astronomer for the Hobby-Eberly Telescope (HET) in the beautiful Davis Mountains of west Texas. The HET is a fully queue scheduled 10-m class optical and near-IR spectroscopic telescope located 6,600 feet above sea level. The observing queue is run by the team of Resident Astronomers who serve as on-site observing specialists, generally each working about 7-10 nights per month. Currently the facility instruments include the Visible Integral-field Replicable Unit Spectrograph (VIRUS), the Low-Resolution Spectrograph 2 (LRS2), and the Habitable-zone Planet Finder Spectrograph (HPF). All together, this powerful suite of spectroscopic instruments on one of the world’s largest optical telescopes enables a diverse range of research possibilities.
The Resident Astronomer position includes up to 25% time for personal research and funds to support research (computing, travel, publications, etc).
Key responsibilities of the position include:
- Leading nightly science observations safely and efficiently from sunset to sunrise.
- Working with the HET partner scientists to verify the integrity and quality of the observations and help optimize the scientific productivity of the facility.
- Working with instrument scientists and engineering staff to maintain and document the performance of the HET and its instruments.
- Documenting the current status of science operations through wikis and web pages.
- Conducting projects to characterize and/or improve science operations.
- Up to 25% of the work hours are available to conduct personal research and to contribute to the scientific life at the observatory.
The full job advertisement is available on the AAS job register:
and the application is available on the UT workday website:
HPF’s first new astronomy result is now published! The team has validated their first planet, G 9-40b.
The article in the Astronomical Journal is available here: https://iopscience.iop.org/article/10.3847/1538-3881/ab5f15
And here is a freely-available version of the paper on the arXiv pre-print server: https://arxiv.org/abs/1912.00291
Press releases on this from PSU, UT are at:
For a more publicly-accessible description, see the HPF team’s blog: https://hpf.psu.edu/2020/02/20/g-9-40b-hpfs-first-planet-validation/
As of Wednesday Feb 12th, the DIMM (Differential Image Motion Monitor) telescope is temporarily out of commission due to a technical problem. We usually run this telescope (mounted a few hundred feet from the HET on a platform to monitor native site seeing) while observing and provide the DIMM image quality (seeing) measurement to PIs with their observations. However these measurements will be temporarily unavailable while we are fixing the issue.
(Edit Feb 22nd: the DIMM functionality has been restored!)