gbtnews #18
10 May 2004

Call for GBT Proposals - Trimester 04C
Deadline: 1 June 2004, 5:00 P.M., EDT

The next deadline for observing proposals for the GBT will be 1 June 2004.  
At this call, we will accept approximately 700 hours of low frequency
(<=10 GHz) observing time and approximately 200 hours of high frequency
(>10 GHz) time.  We have essentially eliminated the backlog of proposals
for low frequencies but still have a significant queue of higher frequency
proposals carried over from previous terms.  We expect that all older
proposals in the queue will be scheduled within the next two trimesters,
however.

We will accept proposals for all commissioned receivers for this call,
including 290-920 MHz (PF1), 910-1230 MHz (PF2), 1.15-1.73 GHz (L),
1.73-2.60 (S), 3.95-5.85 (C), 8.0-10.1 (X), and 12.0-15.4 (Ku), 18.0-26.5
(K), and 40.0-52.0 GHz (Q-Band).  We should complete the commissioning of
the Ka-band receiver in the fall and early winter, but it will not be
available for extensive astronomical use before Trimester 05A.  
Consequently, we will not accept proposals for Ka-Band before the 05A
deadline in October.

Available observing modes include spectral line, continuum, pulsar, and
VLBI/VLBA.  Pulsar modes include those with the Spectral Processor, and
the BCPM (Berkeley-Caltech Pulsar Machine) through agreement with its
developers.  The pulsar Spigot mode of the GBT Spectrometer will be
available in limited modes for expert users through agreement with its
developers.  Proposals requesting GBT participation in VLBA or global VLBI
observations should be submitted to the VLBA only, not to the GBT.

The Observatory continues to offer financial support for graduate and
undergraduate students performing research with the GBT through the
Student Support Program.  Applications are made in conjunction with GBT
observing proposals, and will be accepted at the 1 June 2004 deadline.  
Information about the program can be found at
	http://www.gb.nrao.edu/gbtprops/gbtstudentsupport.shtml

All proposals must be submitted electronically using version 1.1 of the
NRAO Proposal Submission Tool (PST), which is available from the downloads
page.  If you have downloaded v1.1 previously, you need to download a new
version of the gbtDatan.xml file, which informs the PST of available
resources, start and end dates, etc., for each trimester.  This is a
simple text file, which needs to be copied to the appropriate source
location for the PST to access.

Proposal receipt will open on Friday, 14 May 2004 and will close at 5:00
P.M. EDT on Tuesday, 1 June 2004.  (N.B. The deadline falls during the AAS
meeting, so please allow for that in your submission planning.)

Questions about the proposal submission process may be addressed to Carl
Bignell (304-456-2165 or cbignell@nrao.edu). Technical questions about GBT
hardware, software, and observing modes may be addressed to Ron Maddalena
(304-456-2207 or rmaddale@nrao.edu).

						Phil Jewell