Despite the fact that we still rely on ground transport and transport
by helicopter, we are confident that we can support at least three
configuration changes this winter. We therefore ask investigators to
submit proposals for all four of the primary configurations of the six
antenna array. The D, C and B configurations have already been
scheduled last winter. With the A configuration, the Plateau de Bure
Interferometer will offer anew the possibility to carry out high
resolution observations. The A configuration provides an angular
resolution of 0.6'' at 230 GHz for targets at
A preliminary configuration schedule for the winter period is outlined below. Please note that the more compact configurations (C and D) will be available only at the end of January at the earliest. The scheduling priority will later be adapted according to pressure in right ascension ranges and may further be changed during the winter period depending on weather conditions. The configuration schedule should be taken as a guideline, in particular when astronomical targets are requested that cannot be observed during the entire winter period (45 sun avoidance circle).
|Conf||Scheduling Priority Winter 2002/2003|
|B||November - December|
|A||December - January|
|C||February - March|
|D||March - April|
When the atmospheric conditions are not good enough at
1.3mm, 3mm projects will be observed: last winter, 20-30% of the time
was found to be poor at 1.3mm, but was excellent at 3mm. We therefore
invite proposers to submit a significant number of proposals also for
observations at 3mm.
Finally, we would like to draw attention to the fact that we have started discussions with the CDS about the publication of summary tables with detailed information on PdB proposals. As a further step to making the interferometer results available as widely as possible, we are discussing the introduction of proprietory periods for which the data will be protected before becoming available in an archive.
Under normal operating conditions, IRAM schedules and completes between 40 to 60 projects during the winter period, with an elapsed time of at least two months between start and end of any given project. Selection is based on scientific merit, technical feasibility, and adequacy to the instrument.
Details of the PdBI and the observing procedures are given in the document ``An Introduction to the IRAM Plateau de Bure Interferometer''. A copy can be obtained from the address below or from the World-Wide-Web at http://iram.fr/PDBI/bure.html). Proposers should read this document carefully before submitting any proposal.
Proposal templates "proposal.tex" as well as the Latex style file "proposal.sty" are available by anonymous ftp from iram.fr (in the directory dist/proposal), or from the Internet via the Web at http://iram.fr/proposal/proposal.html. In case of problems, contact the scientific secretary, Mrs Cathy Berjaud (firstname.lastname@example.org).
Do not use characters smaller than 11pt, which could make your proposal illegible when duplicated or faxed. For the same reasons, also avoid sending figures with grey scale maps by fax. In case your proposal reaches us in time, but is incomplete or unreadable when copied, we will try our best to contact you. The Principal Investigator will receive by return mail an acknowledgement of receipt and the proposal number.
The scientific aims of the proposed programme should be explained in 2 pages of text maximum, plus up to two pages of figures, tables, and references. Proposals should be self-explanatory, clearly state their aims, and explain the need of the Plateau de Bure interferometer.
In all cases, indicate on the first page whether your proposal is (or is not) the resubmission of a previously rejected proposal or the continuation of either a 30m telescope or PdBI proposal. In case of a resubmission, state very briefly in the introduction why the proposal is being resubmitted (e.g. improved scientific justification, observational restrictions).
For this call for proposals, please note the following details.
The six antennas can now be arranged in four primary configurations, instead of the six for the 5-antenna array (the 5-antenna array configurations will still be used during the summer antenna maintenance). The configurations for the winter period will be:
The four array configurations can be used in different combinations to improve on angular resolution and sensitivity. Mosaicing is usually done with D or CD, but the combination BCD can also be requested for high resolution mosaics. Enter ANY in the proposal form if the scientific goals can be reached with any of the four configurations or their subsets.
Please consult the documentation on the Plateau de Bure configurations for further details.
Below 105 GHz, receivers offer best performances in LSB tuning with high rejection (20 dB): expected system temperatures are 100 to 150 K for the winter time. Above 110 GHz, best performances are obtained with USB tuning, low rejection (4 to 6 dB): expected system temperatures are 250 K at 115 GHz.
The 1.3 mm receivers have DSB tuning with typical T below 50 K. Expected SSB system temperature are 250 to 350 K. The guaranteed tuning range is 205-245 GHz, but it may be possible to reach some lower frequencies. Higher frequencies are not feasible on all antennas because of limitations in the triplers.
Please do not forget to specify LSR velocities for the sources. For pure continuum projects, the ``special'' velocity NULL (no Doppler tracking) can be used.
Coordinates and velocities in the proposal MUST BE CORRECT. A coordinate error is a potential cause for proposal rejection.
A local contact will be assigned to every A or B rated proposal which does not involve an in-house collaborator. He will assist you in the preparation of the observing procedures and provide help to reduce the data. Assistance is also provided before a deadline to help newcomers in the preparation of a proposal. Depending upon the programme complexity, IRAM may require an in-house collaborator instead of the normal local contact.
Finally, we would like to stress again the
importance of the quality of the observing proposal. The IRAM
interferometer is a powerful, but complex instrument, and proposal
preparation requires special care. Information is available in the
documentation and at http://iram.fr/PDBI/bure.html. The IRAM staff can
help in case of doubts if contacted well before the deadline. Note
that the proposal should not only justify the scientific interest, but
also demonstrate how the Plateau de Bure interferometer will bring new