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Proposal Identification No.: A1911 Date Received: 2004­Feb­02 12:00:18
Technical Page
Proposal Type: Regular
General Category: Astronomy
Sub­Category: Spectroscopy
Observation Category:
Total Time Requested: 34 Hours
Proposal Title: Mapping Hi and OH Toward NGC 383 (3C31)
ABSTRACT:
We request 34 hours of telescope time to conduct mapping observations at the Hi and OH transitions towards and
surrounding the extended, bright continuum region associated with NGC 383 (3C31) in the Pisces­Perseus
Supercluster (PPS). These observations will allow a detailed morphological analysis of the Hi of the system from
the anticipated emission and absorption information which is otherwise conspicuously absent. From these data a
unique, fully sampled and high spatial resolution map of the thermal characteristics of the system can be calculated
and a dedicated study of the molecular component of the emission region will be possible. These observations will
adopt a hexagonal pointing pattern to Nyquist sample the system, achieving an adequate velocity resolution for the
required studies. This experiment will be the first to analyse the Hi of NGC 383 and its environs on a group­wide
scale. The resolution and sensitivity of the Arecibo telescope makes it the most suitable instrument for this project.
Name Institution E­mail Phone Student
Erik M Muller Arecibo Observatory emuller@naic.edu (787) 878 2612
x 359
no
Service Observing Request Remot e Observing Request
X None X No
All of the observing run. Maybe
Part of the observing run. Yes
Queue Observing
Instrument Setup
L­wide
Atmospheric Observation Instruments:
Special Equipment or setup: none
1

RFI Considerations
Frequency Ranges Planned
1390 ­ 1402
1631 ­ 1643
1578 ­ 1590
1685 ­ 1697
2