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href="/public/teles-instr/paranal-observatory/surveytelescopes/vista/4most/"> 4MOST </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/surveytelescopes/vista/surveys/"> The VISTA surveys </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/surveytelescopes/vista/consortium/"> The VISTA consortium </a></li></ul></li><li class="submenu"><a href="/public/teles-instr/paranal-observatory/surveytelescopes/vst/"> VST <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-308" class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/paranal-observatory/surveytelescopes/vst/mirror/"> The VST mirrors </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/surveytelescopes/vst/camera/"> OmegaCAM </a></li><li class=""><a href="/public/teles-instr/paranal-observatory/surveytelescopes/vst/surveys/"> The VST surveys 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href="/public/teles-instr/lasilla/05metre/double-channel-photometer/"> Double-Channel Photometer </a></li></ul></li><li class="submenu"><a href="/public/teles-instr/lasilla/coude/"> Coudé Auxiliary Telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-372" class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/lasilla/coude/ces/"> CES </a></li></ul></li><li class=""><a href="/public/teles-instr/lasilla/marly/"> MarLy 1-metre telescope </a></li><li class="submenu"><a href="/public/teles-instr/lasilla/09metre/"> Dutch 0.9-metre telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-375" class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/lasilla/09metre/walraven/"> Walraven Photometer </a></li></ul></li><li class=""><a href="/public/teles-instr/lasilla/t70/"> Swiss T70 telescope </a></li><li class="submenu"><a href="/public/teles-instr/lasilla/bochum/"> Bochum 0.61-metre telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-378" class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/lasilla/bochum/bochum-scanner/"> Bochum Scanner </a></li><li class=""><a href="/public/teles-instr/lasilla/bochum/bochum-photometer/"> Bochum Photometer </a></li></ul></li><li class="submenu"><a href="/public/teles-instr/lasilla/danish05/"> Danish 0.5-metre telescope <span class="desktop-children topmenu-arrow fa fa-angle-right"></span></a><span class="mobile-children"><span class="fa fa-angle-down"></span></span><ul id="submenu-aim-381" class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/lasilla/danish05/danish-two-channel-hb-photometer/"> Two-Channel Hβ Photometer </a></li><li class=""><a href="/public/teles-instr/lasilla/danish05/danish-four-channel-uvby-photometer/"> Four-Channel uvby Photometer </a></li><li class=""><a href="/public/teles-instr/lasilla/danish05/danish-six-channel-uvby-hb-photometer/"> Six-Channel uvby–Hβ Photometer </a></li></ul></li><li class=""><a href="/public/teles-instr/lasilla/gpo/"> Grand Prisme Objectif telescope </a></li><li class=""><a href="/public/teles-instr/lasilla/swiss04/"> Swiss 0.4-metre telescope </a></li><li class=""><a href="/public/teles-instr/lasilla/marseille/"> Marseille 0.36-metre telescope </a></li><li class=""><a href="/public/teles-instr/lasilla/grb/"> GRB Monitoring System </a></li><li class=""><a href="/public/teles-instr/lasilla/mascara/"> MASCARA </a></li><li class=""><a href="/public/teles-instr/lasilla/blackgem/"> BlackGEM </a></li><li class=""><a href="/public/teles-instr/lasilla/extra/"> ExTrA </a></li><li class=""><a href="/public/teles-instr/lasilla/test-bed/"> Test-Bed 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class="submenu-aim sublevel"><li class=""><a href="https://www.eso.org/public/science/event-horizon/"> First image of a black hole </a></li><li class=""><a href="https://www.eso.org/public/science/EHT-MilkyWay/"> First image of the Milky Way central black hole </a></li><li class=""><a href="https://www.eso.org/public/science/gc/"> More about the black hole at the galactic centre </a></li></ul></li><li class=""><a href="/public/science/grb/"> Gamma-Ray Bursts </a></li><li class=""><a href="/public/science/archive/"> Science Archive </a></li> </ul> </div> </div> </li> <li><a href="/public/events/">Events<span class="fa fa-angle-down level0-children-arrows"></span></a> <span class="mobile-children"> <span class="fa fa-angle-down"></span> </span> <div class="level1-wrapper"> <div class="level1"> <ul id="submenu-aim-434" class="submenu-aim"> <li class=""><a href="/public/events/press-evt/"> Press Events </a></li><li class="submenu"><a href="/public/events/special-evt/"> Special Events <span 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<div class="container " id="body"> <div class="row no-page"> <div class="col-md-12"> </div> </div> <div class="row page"> <div class="col-md-12 one-column"> <div id="edit-info-block"> <div id="page-edit-success" class="alert alert-success alert-dismissible" role="alert" style="display: none"> <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">×</span></button> Page saved successfully </div> <div id="page-edit-failure" class="alert alert-danger alert-dismissible" role="alert" style="display: none"> <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">×</span></button> Couldn't save page :( Please try again. </div> </div> <div class='page-content'> <div id="editable-content"> <h1>SOXS</h1> <h2>Son Of X-Shooter</h2> <div style="position: relative; overflow: hidden; height: 253px; margin-bottom: 30px;"><a href="/public/images/potw1311a/"> <img style="position: absolute; top: -200%; left: 0; right: 0; bottom: -100%; margin: auto;" src="/public/archives/images/screen/potw1311a.jpg" alt="Catching light" border="0"> </a></div> <div class="row"> <div class="col-md-8"> <p><a href="http://www.brera.inaf.it/~campana/SOXS/Son_of_X-Shooter.html" target="_blank" rel="noopener">SOXS</a> (Son Of <a href="/public/teles-instr/paranal-observatory/vlt/vlt-instr/x-shooter/">X-Shooter</a>) is a new instrument to be installed on the 3.5-m <a href="/public/teles-instr/lasilla/ntt/">New Technology Telescope</a> (NTT) at ESO’s <a href="/public/teles-instr/lasilla/">La Silla Observatory</a> in Chile. This instrument will be a unique spectroscopic facility for following up transient and variable astronomical events from ongoing and future imaging surveys. It will provide a key spectroscopic partner to any kind of transient survey, becoming the premier transient follow-up instrument in the southern hemisphere.</p> <p><a href="https://en.wikipedia.org/wiki/Transient_astronomical_event" target="_blank" rel="noopener">Transients</a> are astronomical events that only last for a certain amount of time. They are currently being discovered at a rapid rate which will only be increased with powerful future survey telescopes, and so the scope to further our understanding within this field is immense. However, it is critical that these discoveries are rapidly followed up within minutes or hours by dedicated optical telescopes. Designed to see in optical and near-infrared wavelengths, SOXS will be able to achieve this.</p> <p>“<em>In the last few years, optical surveys have discovered new classes of supernovae — super-luminous supernovae — and rare transients,</em>” comments Sergio Campana from <a href="http://www.inaf.it/en" target="_blank" rel="noopener">INAF</a> (at Osservatorio astronomico di Brera) in Italy, the institution leading the SOXS consortium. “SOXS will help us deepen our knowledge of these sources. We will study in detail the disruption of stars by supermassive black holes, and we can also try to pinpoint the counterparts of gravitational wave sources or very high-redshift gamma-ray burst counterparts, when the Universe was only several hundreds of millions years old.”</p> <p>ESO has strategically chosen the SOXS spectrometer to be installed on the NTT at the La Silla Observatory, at the edge of Chile’s Atacama Desert. Here, SOXS will follow-up on a mixture of transients encompassing all distance scales and branches of astronomies, including fast alerts (such as gamma-ray bursts and gravitational waves), mid-term alerts (such as supernovae and X-ray transients), and fixed-time events (such as the close-by passage of a minor planet or asteroid). It will also have the scope to observe exoplanet transits, active galactic nuclei and blazars, tidal disruption events, fast radio bursts, and more!</p> <p>SOXS aims to observe and classify these sources, to discover new kinds of sources, and to study and characterise the most interesting ones. But how does SOXS work?</p> <p>“<em>The instrument separates the incoming white light into a spectrum, where the position on the detector corresponds to a given wavelength, like the rainbow,</em>” explains Sergio Campana. “<em>The presence of emission and absorption lines — which show up as bright or dark lines in the spectrum — is a clear marker of specific elements, which allows us to study the chemical composition and the redshift of the source. For cosmological sources — that is, sources outside our galaxy — this allows us to determine how far away they are.</em>”</p> <p>The schedule of SOXS will be flexible and updated daily in order to respond to fast alerts, with scientists ready to respond instantaneously.</p> <p>SOXS is expected to see first light in early 2025.</p> </div> <div class="col-md-4"> <table class="table table-bordered" width="100%"> <tbody> <tr> <td> <h3>SOXS</h3> <p><small>This table lists the global capabilities of the instrument. </small></p> <table class="table"> <tbody> <tr> <td valign="top" width="30"><strong>Location:</strong></td> <td valign="top">La Silla Observatory</td> </tr> <tr> <td valign="top" width="30"><strong>Telescope:</strong></td> <td valign="top"><a href="/public/teles-instr/lasilla/ntt/">New Technology Telescope</a></td> </tr> <tr> <td valign="top"><strong>Focus:</strong></td> <td valign="top">Nasmyth</td> </tr> <tr> <td valign="top"><strong>Type:</strong></td> <td valign="top">Spectrograph</td> </tr> <tr> <td valign="top"><strong>Wavelength range:</strong></td> <td valign="top">350–2000 nm</td> </tr> <tr> <td valign="top"><strong>Spatial resolution:</strong></td> <td valign="top">Seeing limited</td> </tr> <tr> <td valign="top"><strong>Spectral resolution:</strong></td> <td valign="top">R~4500</td> </tr> <tr> <td valign="top"><strong>First light:</strong></td> <td valign="top">2025 (planned)</td> </tr> <tr> <td valign="top"><strong>Science goal:</strong></td> <td valign="top">Following up, studying, and classifying transient sources from ongoing and future imaging surveys</td> </tr> <tr> <td valign="top"><strong>Images taken with the instrument:</strong></td> <td valign="top"><a href="https://www.eso.org/public/images/archive/search/?instrument=93">Link</a></td> </tr> <tr> <td valign="top"><strong>Images of the <strong>instrument</strong>:</strong></td> <td valign="top"><a href="/public/images/archive/search/?subject_name=SOXS">Link</a></td> </tr> <tr> <td valign="top"><strong>Videos of the <strong>instrument</strong>:</strong></td> <td valign="top"><a href="/public/videos/archive/search/?subject_name=SOXS">Link</a></td> </tr> <tr> <td valign="top"><strong>Press Releases with the <strong>instrument</strong>:</strong></td> <td valign="top"><a href="https://www.eso.org/public/news/?search=SOXS">Link</a></td> </tr> <tr> <td valign="top"><strong>Consortium:</strong></td> <td valign="top"> <ul> <li><a href="http://www.inaf.it/en">INAF</a> (Italy)</li> <li><a href="http://www.astrofisicamas.cl/en/">Millenium Institute of Astrophysics</a> (Chile)</li> <li><a href="https://www.utu.fi/en/university/faculty-of-science-and-engineering/physics-and-astronomy">University of Turku</a> (Finland)</li> <li><a href="https://star.pst.qub.ac.uk/wiki/doku.php">Queen’s University Belfast</a> (UK)</li> <li><a href="https://physics.tau.ac.il/astrophysics">Tel Aviv University</a> (Israel)</li> <li>The <a href="http://www.weizmann.ac.il/particle/">Weizmann Institute</a> (Israel)</li> <li><a href="http://www.nbi.ku.dk/english/" target="_blank" rel="noopener">The Niels Bohr Institute</a> (Denmark)</li> </ul> </td> </tr> </tbody> </table> </td> </tr> </tbody> </table> </div> </div> </div> </div> </div> </div> </div>  <div class="row footernote"> <div class="col-xs-12 col-md-3"> <a href="mailto:information@eso.org">Send us your comments!</a> </div> <div class="col-xs-12 col-md-3"> <a href="/public/outreach/newsletters/esonews/">Subscribe to receive news from ESO in your language</a> </div> <div class="col-xs-12 col-md-3"> <a href="https://www.cdn77.com">Accelerated by CDN77</a> </div> <div class="col-xs-12 col-md-3"> <a href="/public/about-eso/privacy/">Terms & Conditions</a> </div> </div> <link href="/public/archives/djp/css/extras.d3e54451ebbb.css" rel="stylesheet" type="text/css" /> <script type="text/javascript">var MEDIA_URL = "/public/archives/"</script> <script type="text/javascript" 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