W. M. Keck Observatory overnight captured the very first successful science data from its newest, cutting-edge instrument, the Keck Cosmic Web Imager (KCWI).
KCWI captures three-dimensional data, as opposed to the traditional two-dimensional image or spectrum of conventional instruments. In a single observation, it records an image of the object at multiple wavelengths allowing scientists to explore both the spatial dimension (as in an image) and the spectral dimension (or color) of an object.
“I’m thrilled to see this new instrument,” said Keck Observatory Director Hilton Lewis. “It takes years to design and build these very sophisticated instruments. KCWI is a superb example of the application of the most advanced technology to enable the hardest science. I believe it has the potential to transform the science that we do, and continue to keep Keck Observatory right at the forefront of astronomical research.”
KCWI is extremely sensitive, specifically designed to capture high-resolution spectra of ultra-faint celestial bodies with unprecedented detail. It is able to differentiate even the slightest changes in spectral color with a great degree of accuracy.
This powerful capability is key for astronomers because a highly-detailed spectral image allows them to identify a cosmic object’s characteristics, including its temperature, motion, density, mass, distance, chemical composition, and more.
Often you just need to take note of the small scenes that make up daily life. Over the years I have made an effort to photograph these scenes, there is so much richness in our everyday existence that too many do not notice…
A tiny portion of the extensive cabling that connects the various elements of the Keck Interferometer
An electrician’s tool bag, complete with lockout tag
A dense bit of temporary wiring in the Keck 2 SAA cabinet
Analog ammeters indicate the motor current
A row of circuit breakers in the Keck 2 computer room
The usual mess littering a workbench in the Keck summit electronics lab in the midst of a project
A set of tools ready for use on the Keck 1 nasmyth deck
Part of the Keck 2 logic board, this PCB assembly controls the various control and safety logic for the Keck 2 telescope.
Racks of wire available for use in the Keck summit electronics lab
Bins of bolts in the Keck supply room
The new telescope control system servers take up much of a rack
Patching in an experimental control system to move the Keck 1 telescope, one step closer to a major upgrade.
A pile of power drills await use on a shelf in the supply room
I/O cards and field wiring in the Keck 2 local controls PLC
Spools of wire await use in the electronics shop
A handheld radio used at Keck for daily communication.
A scatter of tools at CSO
Electronics test leads and patch cables hanging from the rack in the Keck summit electronics lab
Hard hats ready for use just outside the Keck 1 dome
A distribution video amplifier built around a THS7324
Multiple cables enter the Keck 2 Adaptive Optics bench.
The many cables needed to operate the Keck 2 telescope thread through the azimuth wrap.
The Nasmyth Deck tool set in the Keck 2 dome
The facility cooling lines that supply cold water to the K2AO electronics vault.
The transformers for the Keck 2 telescope servo drives
An assortment of cable pass through the Keck 2 telescope elevation cable wrap
Looking at the back of a segment with the radial support removed
A sample of the control wiring and circuitry in the Servo Amplifier Assembly
A tangle of cables for the Keck 2 optical bench subsystem
A Keck primary mirror segment jacked up out of the array
A bank of relays form the safety interlock system for the telescope.
A section of the whiffle tree that supports each Keck primary segment
Bins full of stainless steel machine screws in the supply room
Fuses, relays, and contactors in the Keck 2 telescope control system
Tools and drawing lay on the table in the welding shop
The control panel for the telescope hydraulic bearing system pumps
The W. M. Keck Observatory in Hawaii has just been awarded the 2015 NASA Group Achievement Award for pioneering the Keck Observatory Archive (KOA) ten years ago, which has significantly increased the impact of Keck Observatory data. The award was received by Keck Observatory Chief Scientist, Dr. Anne Kinney at NASA headquarters on December 8, 2015.
“For the past 10 years, the NASA KOA team has boosted the science value of data acquired at Keck Observatory by providing the scientific community with open access to WMKO data,” said Mario Perez, Keck Observatory Program Executive at NASA Headquarters in Washington. “They helped set a standard that all new ground based observatories are adopting. For this, the NASA KOA team has earned the NASA Group Achievement Award.”
“We are very proud of this award as well as the KOA project itself,” said Hilton Lewis, Director of W. M. Keck Observatory. “This was the brainchild of Anne Kinney while she was at NASA and who I am happy to report recently joined Keck Observatory as our Chief Scientist. Thanks to her vision, data gathered by all instruments at Keck Observatory is available for everyone to use. The Keck Observatory telescopes are the most scientifically productive on Earth, responsible for gathering data used in about 300 peer-reviewed scientific papers per year – almost one per night. There are terabytes of valuable data collected over the last 20 years waiting to be mined.”
In 2004, NASA established a partnership with WMKO to acquire large volumes of data from a single instrument, the High Resolution Spectrograph (HIRES), for NASA science purposes. It is standard practice to make data from NASA’s space telescopes available to the world in a public archive, but in 2004 it was unheard of to do the same with data from a ground-based telescope. Kinney, then Director of the Astrophysics Division at NASA Headquarters, decided to start a visionary project of promoting public access to these data, and the project began by archiving NASA-acquired HIRES data.
One of the things the recent controversy has starkly revealed is the lack of understanding of what we do on the mountain. Myths and misunderstandings pepper the comment sections of local newspapers and echo on Facebook.
In an effort to change this the obsevatories are introducing a new tour opportunity. The Kamaʻāina Observatory Experience is a free tour of an observatory, with free transportation to the summit for local residents. All that is necessary is a local ID to get a chance to see inside one of the summit facilities.
Rumor has it that Hawaii Forest and Trail will be providing the transport, a comfortable service with knowledgable guides.
Surprisingly this was announced by President Obama at the White House Star Party this week. A rather high profile announcement for a local effort.
I will probably volunteer to help out and be a tour guide when it comes Keck’s turn to host the tour.
So last month the observatory clocks decided is was 1995. A software bug interfered with proper decoding of the GPS time signal. For a few weeks we got by by kludging two of the old clocks together in a creative way to provide good time for the telescopes.
The new clocks are now fully online and operational. I ran one of the new time servers for a couple weeks while keeping the old time servers in place as a backup. These have now been removed, with a second new unit installed as an in-place spare.
Hopefully this will keep everything on-time for the foreseeable future. Two new precision clocks, Microsemi SyncServer S350’s, time accurate to microseconds.
Meantime there may be a fix for the old equipment, a new GPS module by Heol Design. We have one on order to try. It would be a shame to throw out these very nice clocks.
Time… It is simply a matter of time. At 00:00UT May 3rd, many of the observatory computers suddenly started reporting that the date was September 17th, 1995. To say that this created some problems is a dramatic understatement.
The problem came from the primary observatory clock. This clock, properly called a time server, uses GPS signals to create a time reference that is accurate to microseconds. This is made possible by referencing to the atomic clocks carried by each GPS satellite. A time server is intricately connected to the network to distribute this time. Any computer in the building can ask it for time via the NTP protocol, but that has some inaccuracy due to network delays. For equipment requiring more precise time the server distributes a hard wired time reference using the IRIG-B protocol or a 1PPS timing pulse.
Without accurate time a telescope will simply not point in the correct direction. The calculation that the computers perform must take into account our rotating planet. Feed incorrect time to that calculation and you will point to the wrong piece of sky. A few milliseconds off can result in a pointing error of arcseconds, a large error for a large telescope.
Here is the video of last Friday’s presentation, Perspectives on the Future of Mauna Kea. Well worth the watch for anyone interesting in the issue. My thanks to Doug Simons for representing the observatories!
If there is any complaint about the camera work… My fault.
With the start of March the observatory known as JAC is no more. The Joint Astronomy Center ran two telescopes, the United Kingdom Infrared Telescope (UKIRT) and the James Clerk Maxwell Telescope (JCMT). Both telescopes have been transferred to new management and will continue to pursue science.
Some parts of the job are simply fun. Installing the various upgrades to the weather system has been just that. The latest piece of kit being more fun than usual.
We are installing a number of new cameras throughout the facility. Replacing an ancient CCTV system that still uses composite video and black and white monitors. Yeah, that ancient. The system is quite useful, it allows visibility of the telescopes from the operator stations and the manual control panels when you are driving the telescope.
Even that is topped by the camera I installed this fall. The latest camera is a new pan-tilt-zoom camera attached to the weather mast.
The camera does have more prosaic reasons to justify the effort of installing it. With the camera the operators can observe the weather conditions around the telescope, observing supervisors can view the ice and snow on the domes from Waimea, the day crew can check the weather conditions before driving to the summit, and more. The camera does have enough sensitivity to see the brighter stars and the banks of fog that roll over the summit. In full dark and at full gain the image is noisy and faint, not all that great. Given just a little moonlight the performance is much better, allowing visibility of oncoming clouds.
Weather conditions can be extreme on the summit. Last week’s storm being a good example… 100mph sustained winds, 135mph gusts, more than a foot of ice coating any vertical surface and several inches on the ground. The camera is rated to survive such conditions, and has now survived its first major winter storm. Electronic operation is guaranteed by the manufacturer for -40°C, and there is a heater and blower inside the camera dome to remove ice. It was able to melt its way clear, at least partially on the first day, while it took a week to clear the domes for operation.
Even more fun! On Christmas Eve I was contacted by Hawaii News Now for photos of the storm, they were eager to do something about a white Christmas for the evening news. As I had not been to the summit and no one on our crew was up, I simply grabbed some MastCam images and forwarded them. The images were aired in the first couple minutes of the Honolulu evening news!
The camera is not available to the public, it would be too much wear and tear to the pan-tilt mechanism and a huge hog of bandwidth. You have to be inside the Keck network to use, from there it is available to anyone on staff. It has proven quite popular, with many folks using the imagery to check on mountain conditions in the latest bad weather.
Next up, yet more cameras in the dome and even a couple on top of the domes. there is also a precipitation sensor and more in the works for the weather station.
OK, enough fun, back to revising the Keck 2 dome schematics.