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Proposal Identification No.: A2765 Date Received: 2012Sep04 17:02:22
Technical Page
Proposal Type: Regular
General Category: Astronomy
SubCategory: Spectroscopy
Observation Category: Extragalactic
Total Time Requested: 90.75 Hours
Minimum Useful Time: 2.75 hr
Proposal Title: A Deep Arecibo 1 to 10 GHz Spectral Scan of Arp 220
ABSTRACT:
Following our earlier, shallow Arecibo spectral scan of Arp 220, we propose a followup, deep survey using the
Mock spectrometer in ``singlepixel'' mode. This should more than double the signaltonoise ratio of the data, and
among the expected detection of a large number of new molecular lines, we anticipate species and isotopologues
that will be new for these frequencies. The results will contribute to our understanding of the physical and
chemical conditions in the central regions of this prototype Ultra Luminous InfraRed Galaxy (ULIRG). Essentially
the whole frequency range between 1.1 and 10.0 GHz will be searched with noise levels at, and below,
#60 µJy beam -1 for a velocity resolution of 30 kms -1 . A total of 90 hr observing time is requested.
Name Institution Email Phone Student
Christopher J Salter Arecibo Observatory csalter@naic.edu 787 878 2612 X
281
no
Remote Observing Request
X Observer will travel to AO
Remote Observing
In Absentia (instructions to oper
ator)
Instrument Setup
Lwide C Slow Xband Shigh Chigh
Atmospheric Observation Instruments:
Special Equipment or setup: All receivers requested have equal priority, but not all need to be
available at the same time.
RFI Considerations
1

Frequency Ranges Planned
1100 10,000
This proposal requires Iridium RFI protection at 1612 MHz between 10pm and 6am EST.
This proposal requires coordination with Punta Salinas radar within the band 12221381 MHz..
This proposal requires coordination with GPS L3 at 1381 MHz.
2