Planning Spectral Observations

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Planning Spectral Observations Surface Brightness Masers - resolved often at <1kpc HI absorption - background 10 6 K Resolution Global? Fill in e.g. MERLIN? Check archives NGC4261 van Langevelde et al.

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Planning Spectral Observations. Surface Brightness Masers - resolved often at < 798Z 1kpc HI absorption - background Z 10 6 K Resolution Global? Fill in e.g. MERLIN? Check archives. NGC4261 van Langevelde et al. MERLIN archive www.merlin.ac.uk /archive/ EVN archive VL(B)A archives - PowerPoint PPT Presentation

Transcript of Planning Spectral Observations

Page 1: Planning Spectral Observations

Planning Spectral Observations

Surface Brightness Masers - resolved

often at <1kpc HI absorption -

background 106K

Resolution Global? Fill in e.g. MERLIN?

Check archivesNGC4261 van Langevelde et al.

Page 2: Planning Spectral Observations

MERLIN archivewww.merlin.ac.uk/archive/

EVN archiveVL(B)A archivesvia respectiveweb pages

Page 3: Planning Spectral Observations

Line frequency, width, VVLSR,radLSR,rad

RFI avoidanceReceivers, filters & No. IF's available

Correlator capacity NchNpolNBNIF/ <t max

ResolutionHA coverage

Sensitivity How long?

Calibrators observe more than once! Delay Bandpass - bright! Fringe &/or phase Polarisation

leakage Polarisation angle

Can be the same source(s)

Ask advice!


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