Observation by Robin Leadbeater: Three galaxies - one redshift

Uploaded by

Robin Leadbeater

Observer

Robin Leadbeater

Observed

2021 Nov 24 - 20:56

Uploaded

2021 Nov 27 - 14:15

Objects

NGC7769
NGC7770
NGC7771
Spectrum

Equipment

ALPY 200 spectrograph
ATK 314 camera
Celestron C11 SCT 280mm aperture f5.5

Exposure

2400s (4x600s)

Location

Wigton, Cumbria

Target name

NGC 7769, NGC 7770, NGC 7771

Title

Three galaxies - one redshift

About this image

After a failed attempt to take a classifying spectrum for possible supernova AT 2021aexi in NGC 7771 (too faint, bright moon), I noticed two other galaxies in the same guider field so since I was there I decided to take spectra of all three. The spectrum images are sky subtracted and the digitised spectra (R~130) are of the bright central regions. They all show clear H alpha emission at similar redshift so are likely part of the same group at a similar distance.

Files associated with this observation

poster_ngc7769-70-71.png (412.2 kB)

Like this image

Mike Harlow, Jeremy Shears, Nick James, Andy Wilson, Alun Halsey, Callum Potter, Alan Thomas

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