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East Asian VLBI Network (EAVN)

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Status Report 2019A
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Introduction
Introduction
System
Array
Antennas
Nobeyama 45-m Telescope
Tianma 65-m Telescope
Nanshan 26-m Telescope
Receivers
Brief Summary of NRO45 Receiving System
Brief Summary of Tianma65 Receiving System
Brief Summary of NSRT26 Receiving System
Digital Signal Process
Recorder
Correlators
Calibration
Delay and Bandpass Calibration
Gain Calibration
Observing Proposal
Call for Proposal (CfP)
Proposal Submission
Observation Mode
Possible Conflict/duplication with eavn Large Programs
Target of Opportunity (ToO) Observations
Angular Resolution and Largest Detectable Angular Scale
Sensitivity
Calibrator Information
Date Archive
Observation and Data Reduction
Preparation of an EAVN Observation
Observation and Correlation
Data Reduction
Further Information
References

Calibrator Information

The NRAO VLBA calibrator survey is very useful to search for a continuum source which can be used as a reference source to carry out the delay, bandpass, and phase calibrations. The source list of this calibrator survey can be found at the following VLBA homepage,

http://www.vlba.nrao.edu/astro/calib/index.shtml.

For delay calibrations and bandpass calibrations, calibrators with 1 Jy or brighter are strongly recommended as listed in the VLBA fringe finder survey:

http://www.aoc.nrao.edu/~analysts/vlba/ffs.html.

Interval of observing calibrator scans must be shorter than 1 hour to track the delay and delay rate in the correlation process.

Figure 7: The receiver noise temperature (blue crosses) and the system noise temperature (red open circles) at the zenith at K-band (left) and Q-band (right) in VERA-Mizusawa station.

Figure 8: The zenith system noise temperature (red ﬁlled circles) at K-band (left) and Q-band (right) in KVN-Ulsan station.

EAVN ( East Asia VLBI Network )