home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky sci.astro:12224 sci.space:16146
- Newsgroups: sci.astro,sci.space
- Path: sparky!uunet!wupost!cs.utexas.edu!sun-barr!ames!saimiri.primate.wisc.edu!mimbres.cs.unm.edu!constellation!wildcat.ecn.uoknor.edu!rwmurphr
- From: rwmurphr@wildcat.ecn.uoknor.edu (Robert W Murphree)
- Subject: Re: Japanese X-ray satellite: Astro_D
- Sender: usenet@constellation.ecn.uoknor.edu (Usenet Administrator)
- Message-ID: <By017L.3s6@constellation.ecn.uoknor.edu>
- Date: Fri, 20 Nov 1992 05:14:08 GMT
- References: <BxL4vr.EIw@constellation.ecn.uoknor.edu> <1992Nov16.132556.18438@head-cfa.harvard.edu>
- Nntp-Posting-Host: wildcat.ecn.uoknor.edu
- Organization: Engineering Computer Network, University of Oklahoma, Norman, OK, USA
- Lines: 48
-
- slane@head-cfa.harvard.edu (Patrick Slane) writes:
- >> The US hasn't launched any free-flyers in the X-ray since
- >> HEAO or Eistein 10 years ago, have they? A few detectors on
- >> other people's satellites of course, but nothing big since
- >> Einstein.
-
- >Yes, the US space program has had it's difficulties with the concept
- >behind these "Great Observatories" and this is changing. AXAF, while
- >still undeniably a "big science" project, has been streamlined and
- >divided into two missions. AXAF-I will provide the very high angular
- >resolution mirrors necessary to do arc-second imaging - and will have
- >spectral resolution like that of Astro-D (using a CCD developed by the
- >same folks who are providing the Astro-D versions) plus gratings for
- >higher resolution studies. AXAF-S will provide higher spectral resolution
- >capabilities, with lower angular resolution mirrors. And though these
- >missions are long overdue, the US x-ray community has hardly been
- >sitting on its collective hands. Let's not forget that ROSAT was launched
- >by the US and carries the HRI which is a US instrument, and that MAJOR
- >portions of Astro-D (as John noted) were developed by US investigators.
- >I know this is the "few detectors on other people's satellites" you
- >were talking about, but between the two missions you've got US mirrors,
- >CCDs, an HRI and a launch...
-
- I guess, as an amateur astronomer and science kibbitzer my perspective
- is different. After HEAO(Einstein) got all those nice results that
- were written up for us amateurs, it just seemed there WASN't any
- extra-solar x-ray results to read about for about 10 years. I know
- it was probably like IRAS where you had new results from 10 year
- old data every 6 months from 1983 til the present. But it was very
- FRUSTRATING to get that rush of results from the 60's and 70's and
- then this 10 year desert. I know the smaller japanese satellites
- and shuttle-born stuff was still producing results during that time
- but there wasn't much in the popular science press describing it.
-
-
- Maybe now some nice scientist will write up ROSAT's results in a
- lengthy fashion for amateurs and I'll quit making snide comments
- about The US contribution. I know that US x-ray astronomers and
- x-ray instrumentalists have not been idle and It's nice to know
- that new technology like the higher energy resolution ccd detectors
- is still being developed. But it would also be nice, in paternalistic
- controlling way, to think that we had a CONTINUOUS window observatory
- on the x-ray window like the IUE and not these observatories that
- go up for 2 years and then leave us with no eyes in that spectral
- window for so long. I also know that professionals whose careers
- depend on a 10 year mission suffer in a much more real way than
- thankfully, I ever shall over the delays. Probably as good a way
- to learn patience as any other, I guess. 1
-