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Proposal Identification No.: A1955 Date Received: 2004 ­Jun­01 17:54:50
Technical Page
Proposal Type: Urgent
General Category: Astronomy
Sub­Category: Spectroscopy
Observation Category: Solar System
Total Time Requested: 30 Hours
Proposal Title: Additional Time on Comet LINEAR 2003 K4: Testing ALFA at OH Frequencies
ABSTRACT:
ALFA detection of 18­cm OH lines presents new science opportunities. A bright comet is available as an extended
OH line source, 25 mJy predicted flux in late July and early August 2004. We propose to extend our existing time
request of 4 days under project A1851, by 30 additional hours to use ALFA in OH mode, and do additional testing
while in the OH configuration. Since changing modes is time­consuming, extended testing now would be the most
e#cient way to determine the ALFA capabilities so that appropriate proposals can be made when ALFA is
generally available. The results of these observations will be available immediately to the scientific community.
Name Institution E­mail Phone Student
Ellen S Howell Arecibo Observatory ehowell@naic.edu 787­878­2612
x282
no
Service Observing Request Remot e Observing Request
X None No
All of the observing run. Maybe
Part of the observing run. X Yes
Queue Observing
Instrument Setup
L­wide ALFA
Atmospheric Observation Instruments:
Special Equipment or setup: We are testing ALFA at OH frequencies, and need for the OH filters to
be on ALFA during the times scheduled.
RFI Considerations
1

Frequency Ranges Planned
1610,1665,1667,1720
2