AAVSO Alert Notice 399: Nightly Monitoring of AG Dra in Support of HST Calibration ObservationsAAVSO Alert Notice 399: Nightly Monitoring of AG Dra in Support of HST Calibration Observations
AAVSO Alert Notice 399:<br /> Nightly monitoring of AG Dra in support of HST calibration observations<br /> July 27, 2009 <p>Edward Smith (STScI) has requested nightly photometric monitoring of the symbiotic star AG