British Astronomical Association
Supporting amateur astronomers since 1890

BAA Images Tony Rodda

Observation by Tony Rodda: V725 Tau during outburst

Uploaded by

Tony Rodda

Observer

Tony Rodda

Observed

2016 Nov 23 - 20:30

Uploaded

2016 Dec 07 - 16:29

Objects

Spectrum

Equipment
  • C925 (0.63) with CGEM
  • ALPY600 with calibration module
  • Atik460EX mono
Location

Newcastle (TRO)

Target name

V725 Tau (X-ray binary)

Title

V725 Tau during outburst

About this image

Some of you may have seen the recent notices recently from TA, BAA, AAVSO, et al regarding the Be star in the high mass X-ray transient AO535+26/HDE245770.

I took this on 23/11/2016, roughly midway between Periastron (16th) and the final coverage date requested (2/12/2016).  That is, at the onset of the X-ray outburst following the optical brightening expected at Periastron passage.

Nothing like the usual O type star spectrum (either using a nearby Miles star or a Pickles O9V as instrument responses).

The flux calibration can't be taken seriously as the star brightens from it's usual 9.39 V mag in that regime at this point.  

Files associated with this observation
Like this image
Copyright of all images and other observations submitted to the BAA remains with the owner of the work. Reproduction of work by third parties is expressly forbidden without the consent of the copyright holder. By submitting images to this online gallery, you grant the BAA permission to reproduce them in any of our publications.