SHOCnWonder

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Revision as of 14:05, 22 February 2024 by Nerasmus (Talk | contribs) (Specifications)

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Introduction

This page contains additional information for the "new SHOC" aka "shocnwonder" that is now permanently mounted on the 74-inch as a secondary instrument via the 74-inch "Instrument Selector" so user should first familiarise themselves with the "Instrument Selector" wiki: wiki-link.

All the hardware for the new SHOC system is new but the underlying control software, GUI and data-folder structures etc. are identical to the old SHOC systems so user should also first familiarise themselves with the old SHOC wiki if they are not already regular SHOC users: wiki-link.

Specifications

  • Camera: Andor DU934P deep depletion camera, 1024 × 1024 CCD, 13 μm pixels (CCD performance test sheet)
  • Spectral range: 400.5 – 799.5 nm [1]
  • Spectral resolution:
    Dispersion: 3.88 Å/px
    Resolution:
    80µm slit
    R = 301.0 @4671.23 Å
    R = 374.4 @5823.89 Å
    R= 492.5 @7642.02 Å
    160µm slit
    R = 172 @4671.23 Å
  • Plate scale: 0.588 arcsec/px
  • Field of view: 10.07' × 10.07'
  • Slit: Long slit with narrow (80µm, 2") and wide (160µm, 4") sections.
  • Filters:
    Filter Slide A: Full set of SDSS filters (u', g', r', i', z')
    Filter Slide B: Longpass order blocking (OB) filter, and clear filter. There are three empty slots in this slide available for future use.

  1. Preliminary values based on lab tests at LJMU or original spec. Actual values to be confirmed during commissioning.

GUI and login details

GUI url (onsite or via VPN access only): http://shocnwonder.suth.saao.ac.za:5000/

username: shoc74in

password: the regular "shoc74in" user password

Data access

There is a automated log being generated as files appear on disk by scraping the fits headers:

https://www.saao.ac.za/~sbp/74in_SHW_ObsLogs/

As with the old SHOC systems, data can be copied as follow:

    • Open a shell on your local PC (Putty if you're using Windows or a bash/tcsh/sh if on Mac or Linux)
    • Copy the data using the following command:
       rsync -avzP shoc74in@shoc74in.suth.saao.ac.za:"/data/74in/shw/<YYYY>/<MMDD>/*.fits" /LocalFilePath
         ---- the password is that for the shoc74in accounts
  • NOTE: if the rsync command fails, try it WITHOUT the wildcard (*) and specify a specific file. Some rsync programs apparently do not support this function.

OLD vs. NEW