Date: Wed, 6 May 1998 09:42:37 -0700 (PDT) Message-Id: <199805061642.JAA07135@colman.ipac.caltech.edu> To: 2mass Subject: IPAC 2MASS WG Mtg #151 Minutes Cc: chas, stiening, bgreen Content-Length: 4149 X-Lines: 112 Status: RO IPAC 2MASS Working Group Meeting #151 Minutes 5/05/98 Attendees: R. Beck, R. Cutri, S. van Dyk, T. Evans, J. Fowler, R. Hurt, T. Jarrett, G. Kopan, H. McCallon, B. Nelson, J. White AGENDA 1.) J. Gizis Visit 2.) Northern Observatory Upgrades 3.) 2MAPPS Deliveries 4.) AAS Meeting 5.) 2MASS Science Team Meeting 6.) WIRE/SIRTF Work Sharing 7.) Asteroid Analysis Support Proposal 8.) Assessment of Southern Hardware DISCUSSION 1.) J. Gizis Visit R. Cutri reported that J. Gizis will be visiting IPAC for about a week and will accompany him and D. Kirkpatrick on an observing trip to Palomar, then participate in discussions aimed at finalizing the Quality Assessment procedures. 2.) Northern Observatory Upgrades R. Cutri reported that R. Stiening will be at Mt. Hopkins the first week of June to work on upgrading the telescope. Collimation and focus-control changes are planned. New PSFs will probably need to be computed after the changes, and some iterating of the rotation for optimal dithering is possible but not expected. The camera rotation and telescope step size will be verified in real time after the changes, to be on the safe side. An evening crew will need to be on hand for this. 3.) 2MAPPS Deliveries R. Beck and R. Cutri reported that about half a dozen subsystems have pending redeliveries to correct minor problems. These will be tested on one of the RTB nights tonight. H. McCallon reported that he had encountered an anomaly while rebuilding PFPREP: whether the output executable was valid depended on whether some of the subroutines shared with POSFRM were recompiled at the same time or left over from a previous POSFRM build. There are 24 shared subroutines, and Howard narrowed the the list down to one very simple routine that caused the observed problem when compiled with the "-fast" compiler directive but not otherwise. The mystery was compounded by the fact that identical-option compilations of this routine yielded object modules of different sizes, depending on what else was also compiled in the same execution of the make utility. For now, a working PFPREP executable will be delivered, but some investigation will continue to determine the nature and origin of these anomalies. 4.) AAS Meeting S. van Dyk will maintain a signup sheet for team members interested in attending the AAS Meeting in San Diego June 7-11. The 2MASS Science Team meeting has been postponed, but there will be a 2MASS booth that must be attended. Interested parties should coordinate their plans with Schuyler. 5.) 2MASS Science Team Meeting The 2MASS Science Team meeting previously scheduled for the same week as the AAS Meeting will be held on July 20 or 21 instead. A review of southern data processing is expected to be on the agenda, along with discussions of the intermediate data release scheduled for late August. 6.) WIRE/SIRTF Work Sharing It is expected that T. Chester, R. Cutri, J. Fowler, T. Jarrett, and G. Kopan will spend some time doing work for WIRE, and possibly also T. Evans and R. Hurt. J. White will devote 50% of his time to SIRTF and 50% to 2MASS, not 80% and 20% as reported incorrectly last week. 7.) Asteroid Analysis Support Proposal R. Cutri reported that M. Sykes has submitted a proposal to the NASA Planetary Astronomy division for support in the analysis of asteroid data from 2MASS. Roc also passed along information from Mark to the effect that 2MASS has already become the source of the largest set of near-infrared (i.e., J, H, and K band) asteroid observations, with 96 objects observed in just four of the RTB nights, as compared to 77 previously published. 8.) Assessment of Southern Hardware J. Fowler reported that the southern data processing shows that asteroid associations are proceeding therein, and that canonical darks and responsivities are being produced without any nursing along. Furthermore, the darks show extremely low noise and stable medians, with no startup transients or drifts such as have been seen in the northern hardware.