منابع مشابه
Microlens Parallaxes with SIRTF
The Space Infrared Telescope Facility (SIRTF) will drift away from the Earth at ∼ 0.1 AU yr. Microlensing events will therefore have different characteristics as seen from the satellite and the Earth. From the difference, it is possible in principle to measure ṽ, the transverse velocity of the lens projected onto the observer plane. Since ṽ has very different values for different populations (d...
متن کاملTransverse Velocities of Galaxies From Microlens Parallaxes
The transverse velocity of a spiral galaxy can be measured to an accuracy 60 km s 1 by making parallax observations of quasars being microlensed by stars in the disk of the galaxy. To make the measurement, a quasar must be located behind the disk of the galaxy between about 1 and 2 scale lengths from the center. The quasar must then be monitored for microlensing events and the events followed s...
متن کاملMicrolens Parallaxes of Binary Lenses Measured from a Satellite
Caustic-crossing binary lenses make up about 5% of all detected microlenses. The relative proper motion of a caustic-crossing binary lens can be measured with observations from a single terrestrial telescope. Thus, uniquely, binary lenses can be completely solved with only the addition of a measurement of the microlensing parallax. This solution will yield the mass, distance, and transverse vel...
متن کاملExtragalactic Spectroscopy with SIRTF/IRS
The Infrared Spectrograph (IRS) is one of the three instruments on board the Space Infrared Telescope Facility (SIRTF) to be launched in December 2001. The IRS will provide high resolution spectra (R≈600) from 10–37 μm and low resolution spectra (R≥60) from 5–40 μm. Its high sensitivity and “spectral mapping”-mode make it a powerful instrument for observing both faint point-like and extended so...
متن کاملBandmerging SIRTF Point Sources
1.1.3.) Produce a statistical summary that includes: (a.) counters for the spectral combinations produced, binned by brightest-band magnitude; (b.) mean position offsets and variances on both position axes for all band-pair combinations; (c.) chi-square values for all band-pair position discrepancies, binned by brightest-band magnitude. Items (b.) and (c.) will use only bandmerged sources with ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 1999
ISSN: 0004-637X,1538-4357
DOI: 10.1086/306981