Observations of V420 Aur (HD 34921) needed to support spectroscopy

Active Dates: Oct. 3, 2016 – Oct. 24, 2016


Abstract:

Marcella Wijngaarden and Kelly Gourdji have requested AAVSO observers' assistance in providing optical photometry in support of their high-resolution spectroscopy with the Mercator telescope + Hermes spectrograph in La Palma 2016 October 7 through 17.

Justification:

V420 Aur (HD 34921) is the optical Be star that is part of a peculiar High Mass X-ray Binary that exhibits highly complex and variable spectra. It is difficult to construct a physical model of this HMXB system. Though based on these observations, the system is thought to contain a B[e] star with a dense plasma region, an accretion disk around a neutron star, a shell and circumstellar regions of cold dust. New observations will contribute to a better understanding of this system.

Requested Data Types:

Photometry



Targets
Name Magnitude Variability Type Photometry Notes Spectroscopy Notes
R Aur 6.70 M

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: Marcella Wijngaarden and Kelly Gourdji; Imported Campaign (Alert Notice #554)