Observation by Robin Leadbeater: Quasars in misty skies

Uploaded by

Robin Leadbeater

Observer

Robin Leadbeater

Observed

2024 Jan 05 - 21:44

Uploaded

2024 Jan 08 - 17:40

Objects

Spectrum

Equipment

ALPY 200 spectrograph
ATIK 428 ex camera
Celestron C11 SCT 280mm aperture f5.5

Location

Wigton Cumbria UK

Target name

7C 1821+6419 , QSO B1634+7037

Title

Quasars in misty skies

About this image

Noticing some recent images of QSO by Steve Knight using his little SeeStar S50 Smart Telescope

KUV 18217+6419 / 7c1821+6419

https://britastro.org/observations/observation.php?id=20240103_224931_2197fc161bd3633a

PG 1634+706/ QSO B1634+7037

https://britastro.org/observations/observation.php?id=20231231_203242_a8f101961083698b

I thought it would be interesting to take low resolution spectra to confirm the redshifts. At around mag 14-15, these should have been easy targets for the ALPY200, in this case made more challenging by misty skies and low elevation. Some key emission features identifying the redshifts are clear though.

In 7C 1821+6419 H beta/[OIII] are shifted almost to where H alpha would be at rest and H alpha is pushed well into the IR

In QSO B1634+7037 we see CIII and [Mg II] with rest wavelengths in the UV, unreachable from the ground due to ozone absorption, shifted into the visible region

Files associated with this observation

SK_quasar_poster.png (411.3 kB)

Like this image

Steve Knight, Hugh Allen, Jeremy Shears, Dr Paul Leyland, James Weightman, Graham Winstanley, Alun Halsey

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