LISA High Luminosity Spectrograph User Guide Shelyak Instruments Les Roussets 38420 Revel / France Phone: +33.476.413.681 http://www.shelyak.com Email: [email protected] Ref. DC0012A LISA – User Guide – DC0012A 1 / 67 February 2011 Table of Content 1 Introduction.........................................................................................................4 2 Out of the box......................................................................................................5 3 Overview of the LISA............................................................................................5 3.1 The Basic Elements......................................................................................................5 3.2 Calibrating the spectra.................................................................................................7 3.3 Features & performance..............................................................................................10 3.4 Accessories (optional elements)...................................................................................10 4 Mechanical interfaces..........................................................................................10 4.1.1 Telescope interface......................................................................10 4.1.2 CCD camera interface...................................................................12 4.1.3 Guiding camera interface..............................................................13 5 Starting & tuning................................................................................................13 5.1 Setup your guiding camera.........................................................................................14 5.1.1 Installation.................................................................................14 5.1.2 Guiding camera focus...................................................................14 5.2 Setup your acquisition camera.....................................................................................16 5.2.1 Installation.................................................................................16 5.2.2 Focus.........................................................................................19 5.3 Grating angle............................................................................................................20 5.4 Checking the calibration screen....................................................................................22 6 In the field.........................................................................................................25 6.1 Operation to be done during daylight............................................................................25 6.1.1 Mounting the LISA on the telescope................................................25 6.1.2 Check / Fine tune adjustments (focus guiding, focus LISA acquisition, focus telescope...)................................................................................25 6.2 Standard acquisition procedure....................................................................................25 6.2.1 CCD master frames......................................................................25 6.2.2 Calibration frames.......................................................................26 6.2.3 Object frames.............................................................................27 6.2.4 Reference star spectrum...............................................................28 7 Processing.........................................................................................................28 7.1 Preprocessing............................................................................................................28 7.2 Geometry..................................................................................................................28 7.3 Remove background...................................................................................................28 7.4 Combining spectra.....................................................................................................28 7.5 Extracting spectra......................................................................................................29 7.6 Wavelength calibration...............................................................................................29 7.7 Instrumental response................................................................................................29 7.8 Software...................................................................................................................30 8 Spectroscopy: introduction...................................................................................31 8.1 In the beginning........................................................................................................31 8.2 Different types of spectra............................................................................................31 8.3 Message from light.....................................................................................................32 8.4 Effective temperature and spectral types......................................................................33 8.5 Spectral class............................................................................................................33 8.6 Chemical composition and metallicity...........................................................................33 8.7 Doppler Effect............................................................................................................34 8.8 Conclusion................................................................................................................34 9 Troubleshooting / Support....................................................................................35 LISA – User Guide – DC0012A 2 / 67 10 References.......................................................................................................36 10.1 Books.....................................................................................................................36 10.2 Web links................................................................................................................50 10.2.1 General....................................................................................50 10.2.2 Software...................................................................................50 11 Appendix.........................................................................................................51 11.1 Appendix A - Add Automatic Calibration Module...........................................................51 11.2 Appendix B - Opening / closing the LISA.....................................................................57 11.3 Appendix C - Switching from VIS to IR........................................................................68 11.4 Appendix D - Switching from IR to VIS........................................................................72 11.5 Appendix E - Tuning the grating angle........................................................................72 11.6 Appendix F - Tuning the calibration screen..................................................................75 11.7 Appendix G - Aligning the guiding mirror.....................................................................77 11.8 Appendix H - Focusing & aligning the collimator...........................................................80 11.9 Appendix I - Factory tuning process............................................................................82 LISA – User Guide – DC0012A 3 / 67 1 Introduction This document will help you to use your LISA high luminosity, low resolution, spectrograph. We consider that you are already familiar with spectroscopy basics and that you are able to control your telescope and your CCD camera. We start with a presentation of the instrument, then we'll describe how to prepare it, and and we'll finish with its using in the field. You'll find also in appendix how to tune all the parts of the instrument, as it has been done in the factory. LISA can be used in two different configurations : the standard one is VISIBLE mode. This is the one we describe in this document. The other one is INFRA-RED. You will find in appendix the differences between two configurations and how to switch from one to another (this must be done by experienced user only). Keep in mind that the spectrograph must be tuned and prepared during daylight in a room : do not go straight towards the telescope and wait for night ! Starting in spectroscopy can be impressive, since there are several elements to put under control. But thanks to this guide, you will see that none of them is very complex, and just some rigour is required to make things working together. We hope that you will enjoy spectroscopy with LISA. Join the increasing Shelyak Instruments users and amateur spectroscopist community on Spectro-L (http://groups.yahoo.com/group/spectro-l/) to keep us informed of your progress and results and to look for new projects or observing campaigns. But most importantly, enjoy spectrography! Olivier Thizy ([email protected]) François Cochard ([email protected]) LISA – User Guide – DC0012A 4 / 67 2 Out of the box When you receive the your LISA, you should find these elements : – The LISA spectrograph – A tool set, if you need to tune the instrument – The CCD camera adapter – Documentation – Depending on your order, some optional