== Introduction ==
This page contains additional information for the "new SHOC" aka "'''shocnwonder'''" that is now permanently mounted on the 74-inch 1.9m "Instrument Selector" as a secondary instrument via the 74-inch "Instrument Selector" , so user users should first familiarise themselves with the "Instrument Selector" wiki: [https://topswiki.saao.ac.za/index.php/74%22_/_1.9m_-_%22Instrument_Selector%22 Instrument Selector wiki-link].
All the hardware for the new SHOC system shocnwonder is new , but the underlying control software, GUI, service startup instructions, and data-folder structures , etc. are identical to the old original SHOC systems , so the user should also first familiarise themselves with the old SHOC wiki if they are not already regular SHOC users: [https://topswiki.saao.ac.za/index.php/SHOC SHOC wiki-link].
== Specifications ==
*'''Camera''': [[Media:Andor-ixon-ultra-emccd-specifications.pdf|Andor iXon 888 #BV USB3]] , 1024 × 1024px CCD, 13 μm pixels ([[Media:Shocnwonder_spec_sheet.pdf|CCD performance test sheet]])
*'''Plate scale:''' 0.16 arcsec/px
*'''Field of view:''' 2.7' × 2.7' (the new system also has a focal reducer so the FoV-width is roughy double that the width of the old system)
*'''Filters:'''
*:'''Filter Slide wheel A:''' U,B,V,R,I *:'''Filter Slide wheel B:''' Currently unpopulated but eventually (will later have u', g', r', i', z')
== GUI and login details ==
GUI url (onsite or via VPN access only): http://shocnwonder.suth.saao.ac.za:5000/ '''OR''' http://shoc74in.suth.saao.ac.za:5000/
username: shoc74inUsername and password will be communicated to you.
password== Acquiring a target with shocnwonder on the instrument selector == The instrument selector has replaced the old acquisition box, though the guide mirror remains. With shocnwonder mounted on the instrument selector, the acquisition procedure is slightly different from when past imaging cameras were mounted on the acquisition box. Whereas before, one would centre the guide mirror to allow the beam to pass through the central hole in the guide mirror to the camera, that hole is now covered by a fold mirror that directs the beam to shocnwonder, which is mounted at a 90 degree angle, effectively in the "initialise" position of the old acquisition & guiding camera. The new guide camera is mounted on linear stages that move in X and Y across the guide star finderchart field of view. If the guide camera is centred, it will obscure the SHOC beam, so it should always be away from centre when using SHOC. The XY slide coordinates at the centre of the field are (7150, 82000). The procedure for acquiring a target with shocnwonder on the 1.9m is as follows: '''On the TCS (tcs74v4), slew to the target:''' '''1.''' If the guide star finderchart GUI is open, kill it with the regular "shoc74inx" user passwordin the top corner '''2.''' Enter RA and Dec into the guide star coordinates GUI, then press “Set” '''3.''' Press “TARGET” on TCS GUI '''4.''' Press “READ” on TCS GUI (RA, Dec will populate from the guide star GUI) '''5.''' Press “Auto” on TCS GUI (telescope will slew to target) '''To ensure that the guide camera is away from the centre of the field to avoid obscuring the SHOC beam, you should select your guide star now:''' '''6.''' On guide star finderchart GUI - click on an appropriate guide star in the region outside of the green circle and the red rectangle '''7.''' On TCS GUI: XY Slides Control - click on “Goto GS” '''8.''' On TCS GUI: Exposures & Guiding - select and appropriate exposure time from the "Expose" pull down menu '''Check fold mirror and focus on TCS GUI:''' '''9.''' Press so that “FOLD MIRROR IS IN BEAM”. It should be in beam at all times while using SHOC. '''10.''' If this is the start of your run, set telescope focus (FOCUS F18) to ~2170 (else use the value from last night/previous target) '''11.''' Set Guide "Camera Focus" to ~6000 (enter 6000 in the "GOTO" box and press Enter on the keyboard) '''12.''' Acquire field on SHOC: * use SHOC's “Preview” mode * adjust telescope pointing* adjust telescope focus* adjust guide camera focus if necessary '''Start guiding:''' '''13.''' Check that there is a guide star in the Acquisition & Guiding Control image, if not, repeat steps 6 & 7 '''14.''' On TCS GUI: Pointer - press “Guide Star” '''15.''' On TCS GUI: Exposures & Guiding - press “GUIDE” '''Start photometry:''' '''16.''' On SHOC GUI - configure and take science exposures
== Data access ==
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" account
* NOTE 1: if the rsync command fails, try it WITHOUT the wildcard (*) and specify a specific file. Some rsync programs apparently do not support this function.
* NOTE 2: data is also backed-up at the end of the night and on a daily basis to the "astro2015" servers so data can also be accessed with the same folder structure from there.
* ssh to the "shoc box" as the "shoc74in" user (password is the regular "shoc74in" user’s password)
ssh shoc74in@shoc74in.suth.saao.ac.za
-> the password is that for the "shoc74in" account
* Navigate to the scripting folder
cd /home/ccd/development/shoc-scripting/