2dF QSO Redshift Appeal

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Final Current number of redshifts: 2 3 4 2 4     (19/06/2002)

Survey Status
On-line postage stamp images of all sources have been changed to be the SuperCOSMOS Sky Surveys (see also SuperCOSMOS Science Archive) blue plates rather than from the STScI/DSS blue plate scans. Both FITS and jpeg versions are available. Note that the old DSS images (as can still be found on the CD-ROM data release 1) were gif format. The SuperCOSMOS scans are slightly higher resolution, so the new images are rather larger even though they still cover a 2 arcmin box. Images may be extracted via the spectroscopic database search page.

New feature on the spectroscopic database search page. You can now search for objects by name. Objects will be extracted for which the entered text is a substring of the published 2QZ object name (e.g., J012330.6-294840).

The completion of the 2QZ and 2dFGRS has been marked by the production of some rather nice plaques for the two teams. Pictures can be seen in an AAO press release.

On 11 April 2002 the final observations for the 2QZ were taken at the AAT. There is of course still a huge amount of work to be done before the public data release, but this puts us one big step closer to that goal. Many thanks go to all the AAO staff and collaborators who have helped us get this far. We are currently working on the final data release which will be made publicly available as soon as it is ready. We are currently aiming for first quarter 2003. Further announcements to follow.

The data CDROMs are now available. Please see you nearest 2QZ representative! The MNRAS paper describing the data release will be published this week.

Public Data Release: The paper describing the first public data release from the survey has now been accepted by Monthly Notices and will appear in vol 322, pink pages 29. CD-ROMs (designed for Linux/UNIX machines) containing the spectra, a custom catalogue search tool and various other survey information have been produced and will be available from survey team members as soon as the paper is published.

Having broken the 10 000 QSO barrier, the survey progress was recently reviewed by both ATAC and PATT and it was agreed that pending a timely data release, the allocation committees would continue to support the 2dF redshift surveys. We are now hoping to have the surveys complete inside two years, with a public data release in the first half of 2001. Details are still to be confirmed. For the time being, the number of QSOs is creeping up slowly and we are continuing to get shocking weather for our observing runs.

I have been receiving complaints about the lack of new news, but there has not really been much to add, other than to say we are going well. Observations are continuing and the weather has been kinder, if not wonderful. 2dF itself has been behaving well. There have been problems with halation on the dewar window and a bad contact sporadically leading to the loss of CCD2, but these are fixed or at least `under cotrol'. Recently there have been some exciting develpments. The science grade CCD has finally been installed in spectrograph 2 and new ADC control software also seems to have greatly improved its performance. These two enhancements appear to have improved our spectroscopic completeness to over 90%, but time will tell if this is maintained.

The recent Coral Sea Cosmology meeting was attended by representatives of several large redshift surveys and I believe the 2dF QSO Survey presented some very good papers. In particular it was most satisfying to be presenting real, new, solid results; fruits of the survey as it were, rather than just our plans. In particular see the presentations by Scott on clustering and by Brian on the luminosity function.

The weather has improved recently and though it is still not quite up to what we might hope for, progress is being made again. In the most recent observing run, we collected a further 607 QSOs.
The other success story is that the automated pipeline software has been upgraded and is working well. We are in the process of re-reducing all the observations to date and are hoping that the new optimal extraction routines will improve our ID completeness rates, so you should see the counter above tick up a few more objects over the next month.

We have had such awful weather recently that there has been very little progress. It even snowed up at Coonabarabran during our last observing run. The progress indicator has crept up a little, to 1313 and this does not include the bright QSOs identified with FLAIR; currently 117.

We have broken the 1000 mark, with the total now standing at 1169 confirmed QSOs. They are not all from 2dF. There are 46 discovered with the FLAIR system on the UK Schmidt Telescope and 30 from observations with DBS on the ANU 2·3m Telescope. They were all selected from the same 2dF QSO Redshift Survey input catalogue and further details of the separate observations will appear on these pages in time.

The most recent 2dF observing run yet again produced the best data to date, but we shall leave it to the 2dF team to summarise current status and outstanding problems.

With the recent availability of the full 400 fibre system on 2dF, we are suddenly making amazing progress. During the October 1997 run the 2dF team were able to observe and re-configure simultaneously and despite the poor weather, just over 1000 QSO candidates were observed. (Thanks to them again for all their effort on our behalf) We are still in the process of measuring all the redshifts, but the progress bar above is really starting to grow.

Example Spectra and Preliminary Results

This section has been superceded. See our new results page.

  • From our first observing run.
  • Data from another early commissioning run.
  • Postscript plot of some QSOs and galaxies taken from an AAO Newsletter article.
  • Still more exmaples. These 10 spectra were selected to be of better than average quality and are drawn from across the full redshft range of the survey. They are therefore better regarded as `example QSOs' than as samples of the 2QZ. Postscript figures or On-screen GIF plots.
  • Our observed magnitude, redshift and spatial distributions.
  • We do not only find QSOs. This plot shows UBR catalogue contamination as a function of colour.

    What's New
    Spectroscopic Data Release 1
    A few cosmetic updates and changes. The new URL should now be working and all future access to the web page be via http://www.2dfquasar.org.
    A few cosmetic updates and changes. I have added a results page. I would consider this much more a `work in progress' page than just links to published papers. At the moment there is little there, but I would gratefully accept submissions from team members of things to include. These can either just be interesting plots about which I can write a brief public explanation, or write up a whole page I can simply link to.
    Survey team members can now get the FITS and gif postage stamp images of all 2QZ sources from the database extraction web form.
    Some more example spectra have been included.
    Full QSO+galaxy files can now be extracted from the database by team members. See the archive page.
    Extracting data from the archive just got easier again. Instructions are here. Remember, this is for survey member only. You can expect an announcement about schedule for public data release `soon'.
    More information on how survey members can extract the data they need from the archive.
  • Putting together the HTML proceedings for the Coral Sea Conference has given me the excuse to put up a few more pretty colour plots. There are updated N(m) and N(z) histograms, and a new wedge plot showing the QSOs and the 2dF galaxies. There is also a map of survey sky coverage and a figure illustrating the UBR catalogue contamination as a function of colour.
  • More importantly, I have made some changes to the data archive (survey team members only), most particularly describing how to extract spectra from the database.
    Updated redshift wedge.
    Since you are reading this, you no doubt know that the web page has moved to a new home: http://msowww.anu.edu.au/~rsmith/QSO_Survey/qso_surv.html.
    I have also updated the N(z) plot
    Greater than 1000 QSOs!
    Updated redshift wedge.
    We've added a page for the redshift wedge plot Scott has produced.
    A new update on the survey QSOs' N(m) and N(z) relations.
  • Impressive progress has been made on the 2dF instrument itself. See the 2dF page and in particular a report on the first observing run with the full complement of 400 fibres and both spectrographs observing simultaneously.
  • Updated contact addresses page.
    The CCD photometry used for callibration of the UVX catalogue is now publicly available.
    We have added a few more example spectra from more recent observing runs.
    We have our very first spectra!

    Home Results Contact

    The 2QZ team
    (Tue Jul 2 15:58:17 BST 2002 by RJS)

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