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uc:uc20240305_march_5_2024 [2024/03/28 22:31]
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uc:uc20240305_march_5_2024 [2024/03/29 04:02] (current)
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| Attending: Nancy Chanover (NMSU), Jamey Eriksen (APO), Joanne Hughes (Seattle U), Kevin Schlaufman (JHU), Aleksandr Mosenkov (BYU), Moire Prescott (NMSU), Mukremin Kilic, (OU), Ben Williams (UW), Adam Kowalski (CU), Eric Bellm (UW), Anne Verbiscer (UVa), Derek Buzasi (FGCU), Misty Bentz (GSU), Bill Ketzeback (APO) | Attending: Nancy Chanover (NMSU), Jamey Eriksen (APO), Joanne Hughes (Seattle U), Kevin Schlaufman (JHU), Aleksandr Mosenkov (BYU), Moire Prescott (NMSU), Mukremin Kilic, (OU), Ben Williams (UW), Adam Kowalski (CU), Eric Bellm (UW), Anne Verbiscer (UVa), Derek Buzasi (FGCU), Misty Bentz (GSU), Bill Ketzeback (APO), Sarah Tuttle (UW) |
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| === Additional telescope and instrument discussion === | === Additional telescope and instrument discussion === |
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| Kevin France's CU class is on site right now. The weather is improving but a storm is coming this weekend. We have seen seasonal motion errors with the telescope but nothing out of ordinary. KOSMOS has been vacuum pumped and is now working normally. The 1.25 and 20" slits being worked on/tested. DIS red camera has been recovered. The echelle was taken out of service for a partial warm-up to warm up detector and keep the inter-order light from getting too bad. It was subsequently returned to service. The question was asked whether the warm-up of the echelle is related to the previous issue it had? Bill replied yes. There is some water vapor condensing on some surface that the CCD is seeing. In the past we have seen this after a pumping cycle and cool down, but it doesn't happen every time. This time, the contamination grew rapidly after the last pumping cycle and subsequent cool-down. In the past we have had success with just warming the inner dewar that contains the CCD while keeping other one cold; we think this forces the condensate to migrate to the coldest thing in the vacuum vessel. We will do this for about a week and then cool it back down, hoping to have better success. One observing program that had the echelle as their primary instrument was affected but KOSMOS was used as a backup instrument instead. There was a question about how the DIS red channel was brought back to life. Bill replied that the order of restarting the software and hardware was the solution. The new 20" KOSMOS slits have been added to the suite of slits and returned to service. The 1.25" slits had some machining issues and are being shipped back to UW to be remade; we hope that they will be available soon. The 2.1" is still most popular width. | Kevin France's CU class is on site right now. The weather is improving but a storm is coming this weekend. We have seen seasonal motion errors with the telescope but nothing out of ordinary. KOSMOS has been vacuum pumped and is now working normally. The 1.25 and 20" slits are being worked on/tested. DIS red camera has been recovered. The echelle was taken out of service for a partial warm-up to warm up detector and keep the inter-order light from getting too bad. It was subsequently returned to service. |
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| | Someone asked whether the warm-up of the echelle is related to the previous issue it had? Bill replied yes. There is some water vapor condensing on some surface that the CCD is seeing. In the past we have seen this after a pumping cycle and cool down, but it doesn't happen every time. This time, the contamination grew rapidly after the last pumping cycle and subsequent cool-down. In the past we have had success with just warming the inner dewar that contains the CCD while keeping other one cold; we think this forces the condensate to migrate to the coldest thing in the vacuum vessel. We will do this for about a week and then cool it back down, hoping to have better success. One observing program that had the echelle as their primary instrument was affected but KOSMOS was used as a backup instrument instead. |
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| | Someone asked how the DIS red channel was brought back to life given that the prognosis sounded pretty bad last month. Bill replied that finding the right order of restarting the software and hardware was the solution. The new 20" KOSMOS slits have been added to the suite of slits and returned to service. The 1.25" slits had some machining issues and are being shipped back to UW to be remade; we hope that they will be available soon. The 2.1" is still most popular width. |
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| === Future instrumentation update === | === Future instrumentation update === |
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| Ocotillo update - have all 3 channels designed. Working through refinement/definition stage before presenting everything in CDR. In lab: first pass of design of fiber bundles, interface with observatory infrastructure. Do our CDR with the observatory before getting everything off the ground. Small pieces: have optical test bench with first camera (off the shelf to be used for any of 3 channels) - CDR - decide if use it or a smaller bandwidth camera. Andor had one built and available so we jumped on. Can build and bring online a single channel without being held up by camera purchases. Current plan: staged deployment - specking robots for robotic option (vs fully packed IFU bundle). Working on project upgrading DESI - take advantage of DESI or S5 robots - best technology but maybe add ours too. Everything paced with IFU, robots can happen same time or later. Spring CDR. Sabbatical in Sept (also summer). Provide updates to UC regularly. We are working to support finalization of reduction package with KOSMOS data - having clear reduction paths. | Sarah Tuttle gave an update on the current status of Ocotillo. They have all 3 channels designed and are working through the refinement/definition stage before presenting everything in a Critical Design Review (CDR). The in-lab efforts include completing a first pass of a design of the fiber bundles and the interface with the observatory infrastructure. They will do the CDR with the observatory before getting everything off the ground. They have an optical test bench with the first camera up and running; this is an off the shelf camera that can be used for any of 3 channels (Andor had one built and available so we jumped on it). This means that we can build and bring online a single channel without being held up by camera purchases. The current plan is for a staged deployment; they are spec'ing robots for a robotic option (as opposed to a fully packed IFU bundle). The CDR will take place in the spring. Sarah is on sabbatical starting in September (but is not scheduled to teach this summer). Once the pace picks up she will provide regular updates to the Users Committee. Another effort underway is that we are working to support the finalization of a data reduction package for KOSMOS. Adam asked what the timeline is for the instrument to reach first light? Sarah replied that she expects at least for the IFU channel it should be within 18 months. She is aiming to have 1-2 channels on sky and in place by the time her sabbatical is over. Next up is to get quotes on optics. |
| Adam: timeline to reach first light? At least IFU channel within 18 months. Need to get quotes on optics next. Aiming for 1-2 channels on sky and in place by time come off sabbatical. | |
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| === 2024 Q1 3.5m scheduling === | === 2024 Q1 3.5m scheduling === |
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| The remaining unassigned time in Q1 is all OPEN: | There was some remaining OPEN time in Q1, but it has since been assigned. At the time of this writing there is no more available time in Q1. |
| ^ Date ^ Start Time ^ End Time ^ Moon Brightness ^ | |
| |2024-03-20 | 20:24 | 01:10 | 86 | | |
| |2024-03-23 | 01:10 | 06:53 | 99 | | |
| |2024-03-27 | 01:10 | 06:47 | 92 | | |
| |2024-03-28 | 19:29 | 01:10 | 86 | | |
| |2024-03-28 | 01:10 | 06:46 | 86 | | |
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| === 2024 Q2 3.5m scheduling === | === 2024 Q2 3.5m scheduling === |
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| The Q2 schedule is in the works. | The Q2 schedule is in the works. Note added in proof: the Q2 schedule is now posted. |
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| === 2024 Q1 0.5m scheduling === | === 2024 Q1 0.5m scheduling === |
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| The Q1 schedule for ARCSAT is basically full. There is one week that is listed as unavailable when we will have classes on site. The Q2 call for proposals will be issued in mid-March. | The Q2 call for proposals will be issued in mid-March. Note added in proof: the call for Q2 ARCSAT proposals has been distributed. |
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| Open action items from previous meetings: | Open action items from previous meetings: |
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| * UC reps: ask your users what capabilities KOSMOS lacks that makes some people still want to use DIS - CU users - no one freaked out about no DIS - got 2 responses plus his - ZBT said could use full spectral coverage with lower res prism, higher res for plan nebula, Adam - could use both if had blue sensitivity | * UC reps: ask your users what capabilities KOSMOS lacks that makes some people still want to use DIS. |
| | * Colorado report: they did not have any users who would be upset if DIS were no longer available. One user said that the capability they really need is full spectral cover with a lower resolution prism. Another user said they needed higher resolution for planetary nebula projects. A third user said they could use both or either of those options, but they really emphasized the need for good sensitivity in the blue. |
| | * UW report: their users require blue sensitivity, high spectral resolution, and Halpha coverage. |
| | * NMSU report: their users need high resolution for line profile analysis, and could also make use of having a lower res mode that provided full spectral coverage in one go. |
| | * OU report: their users find it frustrating that in the current KOSMOS configuration if you include Halpha then you don't get all of the blue. |
| | * UVa report: they have one user who wants to continue using DIS. |
| | * Nancy: get ROM costs for new KOSMOS grisms. STATUS: OPEN |
| | * UC reps: remind your users to review the Q1 schedule and request OPEN/DD time if they can make a good case for it. STATUS: CLOSED |
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| ERIC - UW blue sensitivity, high resolution, halpha | Open action items from this meeting: None. |
| NMSU - high res for line profile analysis, full coverage in one go | |
| Muk - agrees - frustrating that include h alpha but don't get all of the blue | |
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| * Nancy: get ROM costs for new KOSMOS grisms - | |
| * UC reps: remind your users to review the Q1 schedule and request OPEN/DD time if they can make a good case for it. | |
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| Open action items from this meeting: | |
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| * xxx | |
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| === All Other Business === | === All Other Business === |
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| | None. |
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