Photometry and Spectroscopy requested for V406 Vul (XTE J1859+226)

Active Dates: Feb. 4, 2021 – Feb. 4, 2021


Abstract:

Dr. Eric Bellm (University of Washington) has requested AAVSO assistance in monitoring the black hole Low-Mass X-ray Binary V406 Vul (XTE J1859+226), which has brightened significantly in recent days and may be undergoing a major outburst. CCD observations and spectroscopy are requested.

Justification:

A well-sampled optical light curve during the rise from quiescence can help shed light on where in the accretion disk the instability which causes the outburst occurs. The campaign will continue until the optical flux has returned to quiescent levels (V > 20).

Requested Data Types:

Photometry, Spectroscopy



Targets
Name Magnitude Variability Type Photometry Notes Spectroscopy Notes
R Vul 7.00 M

Cadence: Not Specified

Precision: 100

Cadence: Not Specified

Resolution: 250

Desired SNR: 100


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: Dr. Eric Bellm; Imported Campaign (Alert Notice #729)