Apologies for the late transmission of these minutes from last month, which got delayed over the holidays. Note that the next users committee meeting is on Monday, January 23. Please contact your users committee representative if you have any items to be discussed. ----------------------- APO 3.5-m Users Committee Phonecon, 12/12/11 Attending: Suzanne Hawley, Mark Klaene, Bill Ketzeback, Jon Holtzman, John Bally, Michael Strauss, Scott Anderson, Sean Moran, Russet McMillan, Joe Huenerhoff, and Bruce Gillespie Absent: Al Harper, Remy Indebetouw ********************************** User feedback and comments from institutional representatives: o Washington (Scott Anderson) - Scott had nothing to report. o Colorado (John Bally) - John had nothing to report. o Johns Hopkins (Sean Moran) - Sean had nothing to report. o New Mexico State (Jon Holtzman) - Jon had nothing to report. o Princeton (Michael Strauss) - Michael mentioned how impressed he is with TripleSpec, having seen it in action recently. o Virginia (Remy Indebetouw) - No report. o Chicago (Al Harper) - No report. ********************************** Discussion of telescope/instruments report: Mark said that there was not much excitement in the past month (which is good), although the weather has turned colder, cloudier, and snowier. There was a glitch with the rotator that is a consequence of its new encoder system; a workaround exists. The new DIS blue grating is expected to arrive at APO this week. There are continuing problems with stickiness in the echelle guide camera shutter. The new echelle guide camera should be delivered soon. There has been no further work done on NIC-FPS, but recent users have reported that their data are OK. All in all, it's been a quiet month. Mark Klaene's detailed report for the reporting period follows: ************************* 3.5-m Telescope and Instruments Highlights 11/4/11 through 12/6/11 0) Overview A large UVa class trip was completed successfully this period. There was slight medical emergency with one student. This is about the 4th time we have had medical issues with a class trip. Faculty should be mindful of the distance to, and capabilities of, local medical facilities when bringing students out. Despite earlier forecasts predicting a La Nina weather pattern we have seen a series of winter storms already this year. The last storm did leave approximately 8" of snow on the mountain. Expect ice in shaded corners along the Sunspot Highway through March. Traveling to/from APO especially at night during a storm is discouraged. 1) Telescope The telescope has been operational with only minor problems reported. Colder temperatures (-15 deg C) have been seen with only minor issues. Roof snow removal continues when safe to do so. Ice buildup on the lightning arrestors require warmer temperatures and sunshine in order to safe the telescope for opening. There was an issue with rotator tracking that was traced to a motor commutation error. This can happen if the rotator freewheels at a high rate of speed. Unfortunately while it is a known issue, neither identifying the problem nor the solution is easy. However we have now implemented a new way to correct the problem which is much faster. 2) Instruments DIS replacement Blue 400 grating was received by JHU and expected on the mountain any day now. A problem with the DIS shutter and robotics in general were traced to a slightly lower than designed power supply level. Agile, TSpec and SPIcam operated with no new issues. Echelle is operational. JHU personnel will be on site this week to evaluate the grating mounting in preparation for ordering the higher throughput grating. NIC-FPS has been operating in shared-risk observing status. The image corruption issues have not been reported to be affecting science data. GFP software development is continuing, a light leak has been identified and a fix is in work. Commissioning has slowed due to funding issues at GSFC. ********************************** Users traveling to APO: Mark reported on a recent misadventure involving a visiting astronomer who used the GPS in his rental car for directions to APO from El Paso. The GPS directed the astronomer onto forest service dirt roads that were in bad condition, causing the car to get stuck and forcing the visiting astronomer to walk a couple of miles to get help. The GPS routers are notoriously bad at giving directions to APO -- people should follow the written directions posted on the APO website. Suzanne added that we owe our thanks to Kaike Pan at APO for helping with the rescue of the visiting astronomer. ********************************** Board meeting report: Suzanne said that the ARC Board commended us for the past year's accomplishments, and approved our budget for 2012. The site and CIF budgets have been flat for a few years, largely due to the inability of giving raises to the staff because of salary freezes. There are two ARC institutions that are likely to leave the consortium in the next few years, so the ARC Board is forming a Partnership Committee whose job will be to find new partners. It will be possible for new partners to either buy into ARC or to lease time on the telescope. Suzanne asked Users Committee members to help by being on the lookout for compatible new institutional partners. Also, the Board endorsed the AS3 recommended program, and the AS3 Director is being recruited, followed by assembling a committee to define the program detail, arrange institutional collaborations, and initiate fund raising. A more detailed report on the status of AS3 will is being distributed to the ARC communities. ********************************** Narrow-band imaging: In response to concerns raised (recently, belatedly) by some Colorado astronomers, Suzanne wanted to inform the committee on her thoughts on the future of narrow-band imaging at the 3.5-m telescope. It was noted that narrow-band imaging programs have only utilized a few percent of the observing time in recent years. Nonetheless, it is felt that we have three, maybe four, paths to maintain the capability. By the end of next year, we should be able to decide if SPIcam or the upgraded GFP will be our principal narrow-band imager -- only one of these instruments can survive the space crunch we have in the vicinity of the NA2 observing port when GRIZLI arrives. A third path is to add a filter wheel to GRIZLI at some future time, but this would not happen any earlier than 2013, and is not part of the baseline instrument. Lastly, it is possible to use narrow-band filters with DIS in imaging mode, but there are performance limitations that make this choice less than optimal. Jon Holtzman added that there is a camera that uses narrow-band filters on the NMSU 1-meter telescope, with a 15 arcminute FOV. Jon encourages ARC users to contact him (and to look at the NMSU 1-m page linked off the APO home page) for more information. ********************************** Q1 schedule, NIIS reminder: Suzanne announced that the Q1 schedule is out. There are potential target-of-opportunity programs, with programmed payback dark time included in the schedule. Also note that the Wyoming wide-field infra-red imager, NIIS, is on the schedule in March. Exploratory shared-risk observations with NIIS are possible during this run, assuming everything works. User Committee members should share the NIIS white paper that Suzanne sent around last week with their users. ********************************** ACTION ITEMS: [open from previous meeting]: ===> ACTION: User committee members to assemble a listing of all 3.5-m telescope-related publications, theses, etc., submitted (and/or published?) by users at their institution from the past year, October 2010 through September 2011, and send list to Suzanne by 12 December. Status: Closed (although still waiting for lists from NMSU, UVa, and UChicago). [new actions from this meeting]: none ********************************** Next meeting: The next Users Committee phonecon will be on Monday 23 January at 8:30 AM Pacific Time. The agenda and other materials will be sent to the committee members during the preceding week. APO APO APO APO APO Apache Point Observatory 3.5m APO APO APO APO APO This is message 1259 in the apo35-general archive. 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