Long-term CCD monitoring of ER UMa-type variable DDE 48 in Vulpecula

Active Dates: July 21, 2017 – Oct. 31, 2017


Abstract:

The campaign aims to study the long-term behavior of the cataclysmic variable DDE 48 in Vulpecula, an ER UMa subtype of dwarf novae. DDE 48 exhibits superoutbursts to magnitude V=15.4 approximately once a month, with several normal outbursts between the superoutbursts.

Justification:

1) To study the long-term behavior (determine the supercycle length and the exact number of normal outbursts per supercycle); 2) To measure the orbital period and to follow the evolution of superhumps period during the superoutbursts.

Requested Data Types:

Photometry



Targets
Name Magnitude Variability Type Photometry Notes Spectroscopy Notes
DDE 48 15.30 UGER+UGZ

Cadence: Not Specified

Precision: 100

Not Requested

Spectroscopy Lines:

No spectroscopy lines provided

Photometry Filters:

No photometry filters provided

Comparison Stars:

No comparison stars provided


Co-Authorship

Observers are not eligible for co-authorship.

Additional Observer Input:

Not provided

Additional Submission Location:

Not provided


Forum URL

N/A


Notes:

Principal Investigator: Denis Denisenko; Imported Campaign (Alert Notice #588)