Observation 1

  • Time: 7:30pm
  • Set camera cooler to -15 deg C
  • Connected the spectrometer to the telescope.
  • Aligned telescope with Vega by pointing it towards vega and centering it in the finderscope.
  • Attached the iris onto the telescope.
  • With the iris open, changed the focus of the telescope until Vega appeared as a very small dot.
  • Vega was then centered more accurately using the iris.The telescope was moved slightly in first North-South and then East-West directions until Vega disappeared from sight. This was to check the boundaries at which the telescope direction could be moved until Vega was no longer visible. By using judgement of sight, Vega was set approximately in the centre.
  • Once this was complete, set the micrometer position on spectrometer to 0.0mm, started to take 120s exposure frames.
  • Approximately after every 1/2 frames, we had to check that Vega was still properly centred. Due to the position of the telescope, there was a greater error in the RA axis. This meant that the RA fluctuated more than we expected. The RA was changed slightly until Vega was properly centred before we proceeded with data taking.
  • In total, we took 13 frames, all at 120s exposure. Starting at 0.0mm, increasing in 0.5mm increments, and finishing at 6.0mm.
  • After this point, a large belt of cloud appeared that obscured Vega. Also by this point, Vega was so low in the sky that very shortly after, we would not have been able to take data anyway.
  • Observation finished at around 11.30pm.
-- AshleaKemp - 21 Nov 2015
Topic attachments
I Attachment Action Size Date Who Comment
Compressed Zip archivezip 20151121_JB_AK.zip manage 7471.2 K 21 Nov 2015 - 23:17 AshleaKemp  

Physics WebpagesRHUL WebpagesCampus Connect • Royal Holloway, University of London, Egham, Surrey TW20 0EX; Tel/Fax +44 (0)1784 434455/437520

Topic revision: r4 - 27 Nov 2015 - AshleaKemp

This site is powered by the TWiki collaboration platformCopyright © 2008-2018 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding RHUL Physics Department TWiki? Send feedback