Shape-univ May 2002

shape-univ@cosmo.torun.pl

3 participants
8 discussions

w_Q \approx -1.5 ??? (DE-V0.04)
by Boud Roukema 02 Jun '02

02 Jun '02

Cze�� wszystkim, I've done a bit more documentation. Now you should be able to download, compile and run DE-V0.04: http://www.astro.uni.torun.pl/~boud/DE/ and get some nice correlation function plots averaged from all six high completeness 2QZ fields, very similar to the ones in RMB2002. They're not exactly the same, because (i) the random number seeds are almost certainly different and (ii) there are probably small changes like different numerical accuracy on different computers, and small changes made to the programs since the time the results of the paper were obtained. Guess what? I couldn't wait to work on the next step, even when the documentation for the earlier steps is not finished... So I wrote DEdNdzfull (in DEscramble.f) which instead of using (scrambling) the z distribution of just the individual field being analysed, uses the full z distribution of the 2QZ-10K catalogue. It seems to me that this is a better way of producing the "true" redshift selection effects for this particular catalogue than the idea I had before of passing a "typical" QSO spectrum through the optical u, b_J and r filters. The z-scrambling technique means that some *real* signal may have been cancelled out, so the results were conservative. Now, with a more "neutral" z distribution for the "randoms", the signal should in principle be stronger - if it is real. Well, the resulting signal is spectacular! :) :) :) :) We still have a lot of work to do (I have to get plot_cf working), but it seems clear that (0.3,0.7,-1.0) gives a bad fit, and that (0.3,0.7,w_Q) with w_Q \approx -1.5 is likely to give a better fit and signal, which would greatly upset all the theorists! Anyway... during today's session you should hopefully be able to calculate these functions and see for yourself... Na popo�udnie o 14:00 godz, boud

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Re: comments from Charlie Lineweaver
by Boud Roukema 31 May '02

31 May '02

Cze�� wszystkim, Gary is giving talks on RMB02 in Australia on Monday and Tuesday: On Fri, 31 May 2002, Gary Mamon wrote: > Hi Boud, > > With the better z-distribution, the 122 peak is back. With a vengeance. ;) > > Ah? Which better z-distribution? Has Brian Boyle and colleagues released > a larger sample of quasars now? If you have any new plots on this, please > send them at least by Monday morning your time, so that I can show them > for my Mt Stromlo talk (the Macquarie one will probably be less well > attended). Gary, you should be able to download, compile and run DE-V0.04 http://www.astro.uni.torun.pl/~boud/DE/ The format is somewhat similar to ArFus - there are html help files etc. Macquarie: Mon 3 Jun http://www.physics.mq.edu.au/talks/index.html (Some wrote "10QZ" instead of "2QZ-10K" ;) Stromlo: Tue 4 Jun http://msowww.anu.edu.au/astronomy/ozcalendar.shtml shape-univ course: Qn 1 I think we should discuss this afternoon whether we are ready to show some of our new results at these two talks! (It's the old question of what level of "paranoia" - about others taking our results before they are published - is reasonable.) IMHO, I think that Gary should show the new results. Qn 2 Should Gary invite people at the lectures to download DE-V0.05 (which should be ready by Monday) and have them play with it? MSZ, yes, but I'd like to know what everyone thinks... See you in 1/2 an hour, Boud

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cosmology textbooks
by Boud Roukema 24 May '02

24 May '02

<cross-post shape-univ, cosmo-torun, cfalib> Cze�� wszystkim, Printed books are expensive and slow to get, but it *is* more fun to read a book than to learn everything online. So as more people get interested in cosmology at the TCfA it would probably be good to have some more copies of the 1990s generation of basic cosmology texts; and, say, half-a-dozen copies of Numerical Recipes (unless someone knows of a better book than NumRec, since there *are* some criticisms of the subroutines which do "complicated" things like differential equations etc., but in my experience the simplest routines seem to be perfectly OK). Karolina: would you please be able to find out * the cost and approximate delay in shipping for the following: Peebles 1993 Liddle Peacock, John A. Cosmological Physics Padmanabhan Structure formation in the Universe Padmanabhan Cosmology and Astrophysics - through Problems Padmanabhan Course of Theoretical Astrophysics - Volume III: Galaxies and Cosmology (in press) Numerical Recipes * It would also be good to find out what po polsku translations of cosmology introductory texts exist and how much they cost (I guess most are from Pr�szy�ski, translated by CAMK-Warszawa people ;) Everyone: to me it makes most sense to have the library manage copies of these (though I know that I'd like to have some personal copies). I'm not sure how we should decide how many copies to get, and of which we should get copies. (Except for Numerical Recipes: I think that 3-4 copies would be reasonable.) The advantage of getting several copies of the same book is that different students would be able to work with the same language, symbol, etc. conventions and content; but the advantage of having just one or two copies of each of several *different* books is that the material is somewhat different (some of the above say nothing at all about the topology of the Universe; a few may say a little...) and so the collective knowledge of students will be better than if, e.g., just one textbook is available. I think that part of the decision should come from the experience of students - how useful do they find the books, which have the English which is easiest to understand, which do they prefer generally? But it should also come from people as they start doing *research* in cosmology - which texts are the more useful ones? There's no hurry, but these are things to think about. Pozdrawiam, Boud ______________________________________________________________________ Details with URLs: Just start from http://www.astro.uni.torun.pl/ and go to library and you'll find the catalogue search here: http://lx.bu.uni.torun.pl/cgi-bin/BG/Z2Wumk/z2w_f.pl Peebles 1993 - 1 copy po angielsku TCfA http://lx.bu.uni.torun.pl/cgi-bin/BG/Z2Wumk/z2w_f.pl?kl=4467-1022250705&pp=… Liddle - 1 copy po angielsku TCfA 2 copies po polsku - 1 TCfA, 1 biblio g��wna UMK http://lx.bu.uni.torun.pl/cgi-bin/BG/Z2Wumk/z2w_f.pl?kl=4308-1022250625&pp=… Peacock, John A. "Cosmological physics" - 1 copy po angielsku TCfA http://lx.bu.uni.torun.pl/cgi-bin/BG/Z2Wumk/z2w_f.pl?kl=4553-1022250731&dis… Padmanabhan, Thanu no copy at UMK! http://www.iucaa.ernet.in/~paddy/books/books.htm Karolina, if there's difficulty getting the info, you could email Paddy at his admin address: <nabhan at iucaa.ernet.in> Silk, Joseph no copy at UMK! Karolina: could you find out the title(s) of Joe's recent general books on cosmology? Chances are he's probably written a dozen in the last five years ;), and I know for sure there's at least one with a title like "Cosmology". Numerical Recipes 1 copy in TCfA http://lx.bu.uni.torun.pl/cgi-bin/BG/Z2Wumk/z2w_f.pl?kl=5345-1022251291&pp=… 2 copies in Chemistry http://lx.bu.uni.torun.pl/cgi-bin/BG/Z2Wumk/z2w_f.pl?kl=5345-1022251291&dis… http://lx.bu.uni.torun.pl/cgi-bin/BG/Z2Wumk/z2w_f.pl?kl=5345-1022251291&dis… ______________________________________________________________________

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DE-V0.03 released (just in time ;)
by Boud Roukema 24 May '02

24 May '02

Cze�� wszystkim, Just in time for me to catch the bus to Piwnice, voil� version DE-V0.03, with more documentation (i.e. all the routines in DEreadVeron.f + the z scrambling routine, DEscramble.f) http://www.astro.uni.torun.pl/~boud/DE/ The flowcharts now show the *test* routines in green. A good test of the quality (usefulness etc) of the documentation would be to see if you can make some simple modifications of the test routines, and recompile and run them and see if the routines they test seem to work properly... See you in two hours, Boud

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-lX11
by Boud Roukema 22 May '02

22 May '02

Micha�, there are comments regarding "-lX11" in the makemake file in DE-V0.02. Do you think these are sufficient, or should we put them somewhere else? My idea is that the user should edit the makemake file, and not the makefile itself, for things like PGPLOT environment variables, libraries like X11, etc. Boud

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-lX11 (fwd)
by Boud Roukema 20 May '02

20 May '02

My first copy of this seems to have gone missing. Is the sympa daemon down? Or is putting a "-" at the beginning of the Subject: header a problem? > ---------- Forwarded message ---------- > Date: Mon, 20 May 2002 14:36:39 +0200 (MET DST) > From: Boud Roukema <boud@... > To: shape-univ@... > Subject: -lX11 > > Micha�, there are comments regarding "-lX11" in the makemake file > in DE-V0.02. > > Do you think these are sufficient, or should we put them somewhere > else? My idea is that the user should edit the makemake file, > and not the makefile itself, for things like PGPLOT environment > variables, libraries like X11, etc. > > Boud

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DE-V0.02 more or less OK? :)
by Boud Roukema 20 May '02

20 May '02

Cze�� wszystkim, * report on Fri 17 May lecture * credit for course * future * long term future (wrzesie�/listopad 2002) * short term future (czerwiec/lipiec/sierpie� 2002) ------------------------------------------------------------ * Fri 17 May lecture * Welcome back after 3 maja & juvenalia holidays! On Friday 17 maja the people who turned up had already downloaded DE-V0.02, and tried to compile and run. I helped with some minor comments, and everyone succeeded in getting things to the stage of running DEplates for one "field" of the 2QZ data, for one choice of Omega_m, Omega_Lambda, and plotting a real correlation function from this using plotcorrn. Of course, some more work is still needed before getting correlation functions as nice as in the final results... We discussed how to go from here, and it seems that within the constraint that people just work on the project during the Friday afternoon session, we have an efficient working style which is: - Boud adds documentation and corrects bugs during the week - on Friday, everyone else compiles/runs the new version and gives feedback on what bugs there are which seems fine to me. Of course, (see below), there are only two official lectures left... * credit for course * I think I need to tell Andrzej Strobel/Woszczyk which students have officially participated in the course, so that you get credit for it. This is the list of students based on the list membership (excluding PhD students and faculty, who don't need course credits!), please tell me if you think there is anyone missing who should get a credit: - Micha� Fr�ckowiak - Marcin Hajduk - Rafa� Kosi�ski - Hubert Krzemie� - Bartosz Lew - Pawel Ludian * future * There are only two Fridays left in the academic year (if I've understood the calendar correctly): Fri 24 May 2002 Fri 31 May 2002 * long term future (wrzesie�/listopad 2002) * I will ask Andrzeji Kus/Strobel/Woszczyk what formal possibilities there are for a course next semester, but it seems to me that what is important is: - that there is a "lecture course" where students (and faculty) can learn and get their hands on doing real cosmology research - that the "undergraduate" students (I-V roku) can get credit for the course, since it takes time away from their other coursework - that it would be best without exams, but if there is an exam, that the students are equally involved in designing the exam with the lecturer Any opinions? * short term future (czerwiec/lipiec/sierpie� 2002) * I should probably take some holidays and go to some conferences, but so far my plans are still vague. If anyone (including III roku students) thinks that he may wish to continue on the project during czerwiec/lipiec/sierpie� 2002 please say it on the list, or else at the next Friday lecture, as it is more interesting to work *with* someone than alone - maybe several people wish to work together at the same time. Probably it would be best if you put a probability. Here are my probabilities that I will be available in Toru� to work on the DE project in the next few months: czerwiec 2002 95% lipiec 2002 80% sierpie� 2002 50% If several people will be here in June (czerwiec), we could continue with the same time on Fridays, if this is convenient. Na ra�e Boud

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DE-V0.01 compilable + runnable -> antipode ?
by Boud Roukema 13 May '02

13 May '02

OK everyone, Thanks to your comments, DE-V0.01 has now been released! There's not yet any real documentation on the program modules themselves, but what I've done is documentation on how to manage the whole package. Compiling different routines and linking them together is generally done with a makefile, but different versions of linux/unix use different syntax or levels of generality, so I've followed the pgplot solution which is to have a shellscript file makemake which makes the makefile depending on what system you're on. Well, if you download the new package (either with or without the data files; "nodat" means without the data files) from: http://www.astro.uni.torun.pl/~boud/DE_tar/ and then read through the web pages: http://www.astro.uni.torun.pl/~boud/DE/ you should be able to make the library (libDE.a) and compile a program like antipode and see at what redshift the antipodes are. In fact, if you just type make antipode after you've made the makefile, then libDE.a should be made for you automatically... Next on my list: - documentation within each of the more important routines - cosmological routines - routines for reading data - main programs which do the work Cze�� Boud

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Shape-univ May 2002