IPAC 2MASS Working Group Meeting #84 Minutes
IPAC 2MASS Working Group Meeting #84 Minutes, 1/23/96
Attendees: C. Beichamn, T. Chester, R. Cutri, T. Evans, J. Fowler,
L. Fullmer, T. Jarrett, D. Kirkpatrick, G. Kopan, B. Light,
C. Lonsdale, H. McCallon, S. Terebey, J. White
- PS CDR Schedule
- AAS Meeting
- Telescope Status
- Persistence at Scan Endpoints
- PS CDR Schedule -- R. Cutri announced that the
Point Source CDR will probably be held either the week of 2/26 or 3/18.
To prepare for the CDR, he will be meeting with the developers of
point source subsystems to gather information on the status of their
software development, testing, and science team adviser interaction.
- AAS Meeting -- R. Cutri reported that the 2MASS
posters had been very well received at the AAS Meeting. Four posters
from IPAC were presented, along with others from the project.
- Telescope Status -- R. Cutri reported that R.
Stiening had made a trip to Tucson to meet with the bonding company
that is underwriting the telescope development since the original prime
contractor filed for bankruptcy. The bonding company will decide how to
pursue completion of the telescope, and the project will decide whether
this telescope will be used in the northern or southern hemisphere. If
the new telescope is assigned to the southern hemisphere, the Kitt Peak
50-inch telescope may be refurbished and used for the northern
hemisphere, in which case the survey may start a few months ahead of
schedule. This would result in some data archiving at IPAC, since
2MAPPS cannot be expected to be fully ready for production that soon.
It would be necessary for 2MAPPS to support significant data quality
- Persistence at Scan Endpoints -- G. Kopan and T.
Chester reported that they had determined that persistence effects
caused by bright stars are primarily attributable to enhanced
responsivity rather than simple draining of excess electrons. The
brightness of a persistence artifact is therefore much less predictable
than hoped, but the location is completely determined by the pixel
coordinates. The persistence removal algorithm will continue to be
based on position, but the Read1 sources near the beginning of a scan
will be included in the information passed from POSFRM to MAPCOR. This
will allow MAPCOR to search for persistence due to bright stars that
were not covered to the full survey depth of six frames, hence stars
which are not present in the point source extractions for the scan.
Artifacts caused by bright stars incompletely covered at the ends of
scans will have to be removed during catalog cleanup.