WHERE ARE WE GOING? WHERE DO WE WANT TO GO?

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WHERE ARE WE GOING? WHERE DO WE WANT TO GO?
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THE 300-FOOTER WAS MY FIRST TELESCOPE... -POLARIZ
ATION OF THE MOON -MY THESIS MAPPING THE 21-CM
LINE AT THE HIGHEST RESOLUTION THEN AVAILABLE.
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THE HAT CREEK 85-FOOTER WAS MY SECOND
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WE BEGIN WITH HI... AND WE BEGIN AT THE
BEGINNINGHAT CREEK Observing essentials --mult
ichannel spectrometer --digital data recorder
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ARECIBOS GALFA SPECTROMETER (from the
ATA/BerkeleySETI group) 14 specrometers, each
with 8192 channels, 7.14 MHz bw also a second set
of 14 with 512 channels, 100 MHz bw
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INPUT DEVICES typewriter paper tape MYLAR
tape! keypunch cards later magnetic tape more
later disks
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OUTPUT DEVICES -typewriter -paper/mylar
tape -impact printer -calcomp plotter (contour
lines!) -later TV grayscale -much later color
TV
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The first HI images the Green machine with
Ed Jenkins at Princeton. It was used in magazine
publishing. Published in AA. It took three color
separation negatives, endless experimentation in
a darkroom to get the colors right. And now
unavailable on the web, scans are totally
inadequate.
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THESE DAYS, COLOR IS EASY...AND INFORMATIVE. (It
wasnt so long ago that it wasnt so easy!)
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Next on the 85-foot Zeeman splitting of the
21-cm line with Tom Troland.
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In the Orion Dark Cloud, two fields in one
profile 10 microG in emission 10 microG in
self-absorption
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Meanwhile, near the North Celestial Pole (1988 Ap
J)...
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HISTORY OF HI ZEEMAN IN EMISSION Troland
Heiles (1982) detected fields in several
regions. Troland finally got his Ph.D. and
started concentrating on denser regions. Heiles
kept doing the same old thing...
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for a while (January 1993)...
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60
73
217
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1987 to 1997 Total 429 positions
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Most of those 429 positions...
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Verschuurs Indictment
1993 BAAS 182 1993 BAAS 183 1995 ApJ 451
624 1995 ApJ 451 645
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GBT SQUINT GBT SQUASH
Squint is about 1 arcsec, a typical number. For
dv/d??1 km/s/deg, Bfake?1.6 µG. It is easy to
correct for squint, so no problem. Squash is
about 1 arcsec, tiny--negligible Bfake!
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Hat Creek 85 foot
The GBT
3 hours
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Verschuurs Indictment
1993 BAAS 182 1993 BAAS 183 1995 ApJ 451
624 1995 ApJ 451 645
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Reclaiming componentsthe 85-foot lives on in the
form of the Undergraduate Radio Laboratory
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L-V plot, made using an RPA dish of the ATA
EDUCATION --- RESEARCH
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My third telescope ARECIBO! An unforgettable 18
months in the late 60s. While I had been a grad
student1960 to 1963what was happening?
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During that year, Don Campbell taught us about
crosscorrelation polarimetry...on the Crab pulsar.
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WHERE ARE WE GOING WITH DATA CALIBRATION/REDUCTION
? -1st generation individually optimized
obs/red procedures -2nd generation canned
obs/red procedures. enabled optical astronomers
to do significant science. -3rd generation the
Measurement Equation approach.
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Good and bad models for canned GOODVLA, AIPS,
Arecibo IDL, GBTIDL common property Small
number of experts who care about the
SCIENCE. BAD AIPS. LARGE number of PROGRAMMERS
who care about the PACKAGE.
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FUNDING MODELS OLD -Public (NSF in past, AF,
Navy, DARPA) funded radio astronomy. -Private
funded optical FUNDING MODELS NEW -Optical guys
get both. They outnumber us and are politically
powerful.
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FUNDING MODELS FOR PUBLIC EDUCATION (in
California) OLD public funded low tuition
students graduate debt-free and are eager to take
risks for the future. NEW public funding
negligible high tuition students graduate
debt-ridden and focus on a safe, conservative
future. READ MY LIPS NO NEW TAXES!
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WHERE ARE WE GOING?? ITS UP TO YOU!