The Alan Sondheim Mail Archive

May 24, 2010


really bad recordings of some really good music

because what can you expect from atlantic avenue in brooklyn?
carter, voice
freedman, acoustic guitar
sondheim, saz, cura cumbus, oud*

http://espdisk.com/alansondheim/linger1.mp3
http://espdisk.com/alansondheim/linger2.mp3
http://espdisk.com/alansondheim/linger3.mp3
http://espdisk.com/alansondheim/linger4.mp3
http://espdisk.com/alansondheim/linger5.mp3
http://espdisk.com/alansondheim/linger6.mp3
http://espdisk.com/alansondheim/linger7.mp3

*there was also kamanche but it was embarrassing

---------- Forwarded message ----------
Date: Mon, 24 May 2010 20:18:12
From: NASA Jet Propulsion Laboratory <info@jpl.nasa.gov>
To: "sondheim@panix.com" <sondheim@panix.com>
Subject: WISE Makes Progress on its Space Rock Catalog

JPL/NASA News


Feature
                                                                         
May 24, 2010


WISE Makes Progress on its Space Rock Catalog


The full version of this story with accompanying images is at:http://www.jpl.nasa.gov/news/news.cfm?release=2010-176&cid=release_2010-176

 

NASA's Wide-field Infrared Survey Explorer, or WISE, is busy surveying the
landscape of the infrared sky, building up a catalog of cosmic specimens --
everything from distant galaxies to "failed" stars, called brown dwarfs.

Closer to home, the mission is picking out an impressive collection of
asteroids and comets, some known and some never seen before. Most of these
hang out in the Main Belt between Mars and Jupiter, but a small number are
near-Earth objects -- asteroids and comets with orbits that pass within
about 48 million kilometers (30 million miles) of Earth's orbit. By studying
a small sample of near-Earth objects, WISE will learn more about the
population as a whole. How do their sizes differ, and how many objects are
dark versus light?

"We are taking a census of a small sample of near-Earth objects to get a
better idea of how they vary," said Amy Mainzer, the principal investigator
of NEOWISE, a program to catalog asteroids seen with WISE.

So far, the mission has observed more than 60,000 asteroids, both Main Belt
and near-Earth objects. Most were known before, but more than 11,000 are
new.

"Our data pipeline is bursting with asteroids," said WISE Principal
Investigator Ned Wright of UCLA. "We are discovering about a hundred a day,
mostly in the Main Belt."

About 190 near-Earth asteroids have been observed to date, of which more
than 50 are new discoveries. All asteroid observations are reported to the
NASA-funded International Astronomical Union's Minor Planet Center, a
clearinghouse for data on all solar system bodies at the Smithsonian
Astrophysical Observatory in Cambridge, Mass.

"It's a really exciting time for asteroid science," said Tim Spahr, who
directs the Minor Planet Center. "WISE is another tool to add to our tool
belt of instruments to discover and study the asteroid population."

A network of ground-based telescopes follows up and confirms the WISE finds,
including the NASA-funded University of Arizona Spacewatch and Catalina Sky
Survey projects, both near Tucson, Ariz., and the NASA-funded Magdalena
Ridge Observatory near Socorro, N.M.

Some of the near-Earth asteroids detected so far are visibly dark, but it's
too early to say what percentage. The team needs time to properly analyze
and calibrate the data. When results are ready, they will be published in a
peer-reviewed journal. WISE has not found an asteroid yet that would be too
dark for detection by visible-light telescopes on the ground.

"We're beginning the process of sorting through all the objects we're
finding so we can learn more about their properties," said Mainzer. "How
many are big or small, or light versus dark?"

WISE will also study Trojans, asteroids that run along with Jupiter in its
orbit around the sun and travel in two packs -- one in front of and one
behind the gas giant. It has seen more than 800, and by the end of the
mission, should have observed about half of all 4,500 known Trojans. The
results will address dueling theories about how the outer planets evolved.

With its infrared vision, WISE is good at many aspects of asteroid watching.
First, infrared light gives a better estimate of an asteroid's size. Imagine
a light, shiny rock lying next to a bigger, dark one in the sunshine. From
far away, the rocks might look about the same size. That's because they
reflect about the same amount of visible sunlight. But, if you pointed an
infrared camera at them, you could tell the dark one is bigger. Infrared
light is related to the heat radiated from the rock itself, which, in turn,
is related to its size.

A second benefit of infrared is the ability to see darker asteroids. Some
asteroids are blacker than coal and barely reflect any visible light. WISE
can see their infrared glow. The mission isn't necessarily hunting down dark
asteroids in hiding, but collecting a sample of all different types. Like a
geologist collecting everything from pumice to quartz, WISE is capturing the
diversity of cosmic rocks in our solar neighborhood.

In the end, WISE will provide rough size and composition profiles for
hundreds of near-Earth objects, about 100 to 200 of which will be new.

WISE has also bagged about a dozen new comets to date. The icy cousins to
asteroids are easy for the telescope to spot because, as the comets are
warmed by the sun, gas and dust particles blow off and glow with infrared
light. Many of the comets found by WISE so far are so-called long-period
comets, meaning they spend billions of years circling the sun in the frigid
hinterlands of our solar system, before they are shuttled into the inner,
warmer parts. Others are termed short-period comets -- they spend most of
their lives hanging around the space near Jupiter, occasionally veering into
the space closer to the terrestrial planets. WISE's measurements of these
snowy dirtballs will allow scientists to study their size, composition and
density. Measurements of the comets' orbits will help explain what kicks
these objects out of their original, more distant orbits and in toward the
sun.

WISE will complete one-and-a-half scans of the sky in October of this year.
Visit http://wise.astro.ucla.edu to see selected WISE images released so
far.

JPL manages WISE for NASA's Science Mission Directorate, Washington. The
principal investigator, Edward Wright, is at UCLA. The mission was
competitively selected under NASA's Explorers Program managed by the Goddard
Space Flight Center, Greenbelt, Md. The science instrument was built by the
Space Dynamics Laboratory, Logan, Utah, and the spacecraft was built by Ball
Aerospace & Technologies Corp., Boulder, Colo. Science operations and data
processing take place at the Infrared Processing and Analysis Center at the
California Institute of Technology in Pasadena. Caltech manages JPL for
NASA.

More information is online at http://www.nasa.gov/wise
and http://wise.astro.ucla.edu


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