APO 3.5-m Users Committee Phonecon, 6/12/06 Attending: Suzanne Hawley, Bruce Gillespie, Michael Strauss, John Wilson, John Bally, Don York, Karl Glazebrook, Al Harper, Russet McMillan Absent: Jon Holtzman, Remy Indebetouw, Bruce Balick Minutes taken by Bruce Gillespie ********************************** User feedback, comments from institutional representatives: Princeton (Michael Strauss): Nothing much to report, everything is fine. Colorado (John Bally): Nothing new to report, except that CU staff expecting to start commissioning of NIC-FPS Fabry-Perot etalon soon. NMSU: No report. Johns Hopkins (Karl Glazebrook): Nothing to report. Chicago: (Al Harper): No complaints. UWashington (Suzanne Hawley): Several UW grad students who were heavy users of the 3.5m are defending soon, so we are training and expecting use by some new, younger students starting this summer. Univ. of Virginia: No report. ********************************** Discussion of telescope/instruments report: BruceG summarized highlights from the report (see below). ************************* 3.5-m Telescope, Instruments, and CIF Projects Highlights, 4/28/06 through 6/08/06 Bruce Gillespie 0) Overview Highlights include continued dry, less dusty, but cloudier conditions at the site, and smooth operations except for a spate of various computer and network communication problems; successful installation of the new azimuth drive boxes; good progress on the new top-end, and not-so-good progress on the DIS-upgrade projects; and release of a new version of TUI. 1) Telescope The 3.5-m telescope and its supporting systems were fairly robust during this period, and observing was done nearly any time the weather allowed. Part of one night was lost to a problem with the serial communication link to the altitude drive controller, which was quickly diagnosed and repaired. Not so quickly repaired was a fault with our 20 Mb/s microwave link to the internet. It turned out to be caused by a flakey transceiver at the far end (Tularosa) of the link, which was replaced after taking nearly two weeks to determine that the problem wasn't just some kind of interference. The ISP has since acquired test equipment and spare parts to fix these kinds of problems more quickly. In the interim, we were able to revert to a backup T1 circuit that we had kept for such a contingency, which slowed remote operations somewhat but was generally usable for remote observing. We also experienced a rare failure of the Telescope Control Computer. We were able to configure the TCC spare to take over running the telescope within a day, but we learned some things about how hard it is to keep the TCC spare in readiness. In addition, a GPS unit, which provides time to the systems, went down and we reverted to the spare. This cost a little observing time, and an improved communication box to the GPS has been ordered to make our GPS system more solid. Lastly, we continued to see occurrences of NA2 rotator overcurrenting. Some adjustments were made to rotator and instrument balance, and the problem seems to be somewhat better. However, we know the rotator mechanics are marginal, and a study is underway for a future upgrade to the rotator. 2) Instruments The performance of all the instruments was generally good. After reports of a return of the DIS "blue-haze" scattered light problem, the blue dewar was warmed and pumped, after which the scattered light appeared to be gone. 3) Engineering and CIF projects TUI was upgraded to version 1.2. The RAID s/w backup system was purchased and assembled. A large-screen weather display was installed in the control room. The new az drive boxes were successfully installed and tested. We completed a long-term maintenance project to fix various enclosure shutter problems. Some guiding problems with the newer versions of TUI were seen; fixes were incorporated and tested in TUI 1.2. DIS upgrades were replanned--the new blue-medium grating will be installed in June, but the other upgrades are being deferred due to delays in procurements of components (new red detector, other new gratings, blue prism). The top-end project is going well and is scheduled for installation on the telescope beginning 28 August. 4) Miscellaneous Fire risk in the Lincoln Nat'l forest remains high--the forest is now closed to the public, but APO remains open to visitors and users. The APOLLO project made a major breakthrough in technique that showed immediate promise in enabling reliable acquisition of lunar-return photons. ********************************** DIS upgrade plans - Hawley: Suzanne reported that the new blue-medium grating has been received, characterized at JHU, and will be installed in DIS this coming week. Once we confirm its performance in situ, we plan to make it the default for blue low/medium spectra. The other two new gratings have not yet been delivered to JHU, and their testing and installation will have to wait. The other DIS upgrade items previously planned for the end of June have been postponed, due to vendor delays in delivery of the new blue-prism and the new red detector. ********************************** CorMASS and NIC-FPS grism - Hawley: Suzanne pointed out that we have little-used low-resolution NIR spectrograph capabilities in both CorMASS and the NIC-FPS grism. CorMASS is a well-documented echelle spectrograph for point sources, and has an easily used data reduction package supported by UVa. The NIC-FPS grism is relatively new, and once characterized, should be useful for extended sources. It is unclear why APO users are not requesting to use these capabilities, so Suzanne suggested that we should find a way to promote their use more energetically. ********************************** Q3 schedule overview - Hawley: The new Q3 schedule is out. Russet pointed out that the new Q3 schedule has Princeton and JHU undersubscribed, and UChicago oversubscribed. Michael said that most of the Princeton users have mostly extragalactic programs, for which this isn't the season. Karl said there were administrative problems getting the JHU requests in, since there is a new JHU scheduler; Suzanne said that there have since been requests from JHU users for the open time in the schedule. Al mentioned that the UC demand for time has gone up, because there are new users at Chicago. Suzanne also pointed out that the top-end installation shutdown starts at the end of August and runs about three weeks, impinging slightly on plans to use the telescope in September for SDSS-II SNe follow-up. ********************************** Post-2008 ARC Call for Proposals - Hawley, Gillespie: A Call for Proposals was sent to the 3.5-m and SDSS mailing lists at the end of May, with a July 17 deadline, to solicit proposals for future use of the 2.5-m telescope after SDSS-II ends in mid-2008. The proposal call includes the possibility of collaboration with the 3.5-m. All interested users are encouraged to participate in the proposal process. Copies of the CfP, and related information, may be obtained from Bruce Gillespie (gillespi@apo.nmsu.edu). Suzanne and Don York pointed out that this CfP is the next step in the process begun with the ARC Futures committee document, now in near-final draft form. Users Committee and Futures Committee representatives at each institution have copies of the draft and should be actively soliciting comments. The final report is anticipated to be complete in the next few weeks. ********************************** Announcements - Hawley: Suzanne noted that Gabrelle Saurage is starting work as our new Observing Specialist. Also, Suzanne reiterated our recent policy announcement on science data storage at APO: Starting next month, we are going to delete science data from the APO disks from Q3 2005 and earlier. At the beginning of subsequent quarters, the data from the same quarter of the previous year will be erased. ********************************** Previous Meetings Action Items report: [open from previous months]: ACTION: BruceG will ask Russell what the pros and cons are of keeping TUI compatible with older versions of operating systems and libraries. STATUS: Discussed with RO, near to final recommendation. ACTION: Users Committee members should poll their users to ask if there are compelling reasons to keep TUI operable without using the latest version of operating systems. STATUS: Now closed; little feedback so far. ACTION: BruceG to discuss issues of computer and network security with Fritz Stauffer. STATUS: Working group (site staff and users) formed to frame requirements. ACTION: UC members should poll their constituents about ToO observations on the telescope. Do they envision doing this type of science? Would expanding ToO opportunities be useful to them? How do they feel about being asked to voluntarily give up time, and to having their time pre-empted (perhaps with later payback)? STATUS: Closed, see minutes last meeting. ACTION: BruceG will ensure that the orientation checklist is up to date and available on-line, so that prospective new users can review it prior to their orientation site visit. STATUS: Open, plan to complete in early June. ACTION: Jon Holtzman to talk to Fritz and BruceG about installing a RAID backup at NMSU. STATUS: Backup computer assembled and tested at APO. Will shortly copy the backup data to the spare. System to be installed at NMSU in next few weeks. [new actions from last month]: ACTION: Suzanne asked each Users Committee member to send her a paragraph or two in the next two days with an expression of interest and/or questions regarding this proposed NIR instrument. STATUS: Some questions and supportive comments received, sent to instrument PI for consideration. ACTION: BruceG to forward Futures documents to Users Committee members, who then help the institutional Futures Committee member share them with their faculties and gather feedback. STATUS: Draft sent to committee members. ********************************** Next Users Committee phonecon will be on Monday, 17 July, at 8:30 AM Pacific Time. 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 970 in the apo35-general archive. You can find APO the archive on http://www.astro.princeton.edu/APO/apo35-general/INDEX.html APO To join/leave the list, send mail to apo35-request@astro.princeton.edu APO To post a message, mail it to apo35-general@astro.princeton.edu APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO