Version 2.0
(ALMA Cycle 2)

!! IMPORTANT !!: User Message 26/02/2015

Array Instrument Queue Status Help ALMA Helpdesk
OST Latest News
Sky Setup Source model Choose a library source model or supply your own
Upload a FITS file You may upload your own model here (max 10MB)
Declination Ensure correct formatting of this string (+/-00d00m00.0s)
Image peak / point flux in  Set to 0.0 for no rescaling of source model
Observation Setup Central frequency in GHz The value entered must be within an ALMA band
Bandwidth in  Use broad for continuum, narrow for single channel
Use recommended continuum setup? No Yes If Bandwidth = 7.5GHz use the ALMA recommended spectral window
spacing for continuum simulations.
Required resolution in arcseconds OST will choose config if instrument is set to ALMA
Pointing strategy Selecting single will apply primary beam attenuation
Start hour angle Deviation of start of observation from transit
Phase Cycle in   The length of time between cutting to a phase calibrator.
Currently limited to either 0s or between 300s and 600s.
On Phase Calibrator in   The length of time spent observing phase calibrator (including slewing time).
Currently limited to either 0s or between 30s and 120s.
On-source time in  Per pointing for Mosaics.
Number of visits How many times the observation is repeated
Number of polarizations This affects the noise in the final map
Corruption Atmospheric conditions Determines level of noise due to water vapour
Imaging Imaging weights This allows a resolution / sensitivity trade-off
Perform deconvolution? Apply the CLEAN algorithm to deconvolve the image
Output image format CASA format images are returned as a tar file
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