Open main menu
Last modified on 22 February 2024, at 14:05

SHOCnWonder

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

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