As every year, we plan to carry out extensive technical work during the summer semester, including the regular maintenance of the antennas. Further work will also be done on the reduction of the sun avoidance circle. During this period, regular scientific observations will therefore mostly be carried out with the five element array. We plan to start the maintenance at the latest by the end of May and to schedule the D configuration between June and October.
We strongly encourage observers to submit proposals that can be executed during summer operating conditions. To keep the procedure as simple as possible, we ask to focus on:
As for the 30-m telescope, please refer to the full Call for Proposals on the IRAM web pages http://www.iram.fr/GENERAL/Proposals_observing.htm.
The software ASTRO has been updated to reflect these
receiver/correlator setup possibilities. Astronomers are urged to
download the most recent version of GILDAS at ../IRAMFR/GILDAS/
to prepare their proposals.
The previous LINE command has been replaced by several new commands (see internal help; the following description applies to the current receiver system). The behavior of the LINE command can be changed by the SET PDBI 1995|2000|2006 command, that selects the PdBI frontend/backend status corresponding to years 1995 (old receivers, 500 MHz bandwidth), 2000 (580 MHz bandwidth), 2006 (new receivers and new IF processor, 1GHz bandwidth). Default is 2006:
! choice of receiver tuning line xyz 230 lsb low 5500 ! choice of the correlator windows narrow Q2 Q2 ! correlator unit #1, on entry 1 spectral 1 20 520 /narrow 1 ! correlator unit #2, on entry 1 spectral 2 320 260 /narrow 1 ! correlator unit #3, on entry 2 spectral 3 40 666 /narrow 2 ...
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 this
call and at ../IRAMFR/PDB/docu.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 the
need for the Plateau de Bure Interferometer.