TIMMI/2 | ESO

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href="/public/teles-instr/lasilla/36/"> ESO 3.6-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-327" class="submenu-aim sublevel selected current current-leaf"><li class=""><a href="/public/teles-instr/lasilla/36/adonis/"> ADONIS </a></li><li class=""><a href="/public/teles-instr/lasilla/36/caspec/"> CASPEC </a></li><li class=""><a href="/public/teles-instr/lasilla/36/irspec/"> IRSPEC </a></li><li class=""><a href="/public/teles-instr/lasilla/36/harps/"> HARPS </a></li><li class=""><a href="/public/teles-instr/lasilla/36/mefos/"> MEFOS </a></li><li class=""><a href="/public/teles-instr/lasilla/36/nirps/"> NIRPS </a></li><li class=""><a href="/public/teles-instr/lasilla/36/optopus/"> OPTOPUS </a></li><li class=" current current-leaf"><a href="/public/teles-instr/lasilla/36/timmi2/"> TIMMI/2 </a></li><li class=""><a 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class="submenu-aim sublevel"><li class=""><a href="/public/teles-instr/lasilla/05metre/single-channel-photometer/"> Single-Channel Photometer </a></li><li class=""><a 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-374" 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-377" 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-380" 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 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href="/public/"> <div data-spy="affix" class="affix"> <div class="sprites-esologo"></div> <span>European<br>Southern<br>Observatory</span> </div> </a> </div> <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>TIMMI/2</h1> <h2>Thermal Infrared MultiMode Instrument</h2> <div style="position: relative; overflow: hidden; height: 253px; margin-bottom: 30px;"><a href="/public/images/eso0113e/"> <img style="position: absolute; top: -100%; left: 0; right: 0; bottom: -100%; margin: auto;" src="/public/archives/images/screen/eso0113e.jpg" alt="Catching light" border="0" /> </a></div> <div class="row"> <div class="col-md-8"> <p>TIMMI (Thermal Infrared MultiMode Instrument) was a combined camera and spectrometer installed on the <a href="/public/teles-instr/lasilla/36/">ESO 3.6-metre telescope</a> at La Silla. It was based on the detector of ISOCAM, flown on the <a href="https://www.cosmos.esa.int/web/iso" target="_blank" rel="noopener">ESA Infrared Space Observatory</a> (ISO). TIMMI registered light in the mid-infrared part of the electromagnetic spectrum, ranging from 5–17.5 µm, which is valuable for studying the birth of stars and the formation of circumstellar disks and planets. In order to reach sufficient sensitivity at infrared wavelengths, liquid helium was used to cool TIMMI’s camera to approximately -260°C, just a few degrees above absolute zero.</p> <p>Ground-based observations at wavelengths greater than 5 µm are dominated by the strong sky <a href="https://en.wikipedia.org/wiki/Background_(astronomy)" target="_blank" rel="noopener">background</a>: even seemingly empty sky is still fairly bright due to diffuse light in the Earth’s atmosphere. This makes it difficult to detect the fainter light of a target object. At mid-infrared wavelengths, this background radiation changes very quickly on time scales faster than a second. Ground observations therefore require a specific observing technique. For TIMMI this involved a “chopping” secondary mirror, which constantly underwent cyclic movements (“wobbled”) with an amplitude of a few millimetres, changing between the object of interest and the nearby sky. The two images were then subtracted, leaving only the light from the object.</p> <p>TIMMI was extremely productive. Among its many discoveries, TIMMI showed the presence of a disk around a hot and massive star for the first time (<a href="https://www.eso.org/public/news/eso9828/">eso9828</a>), observed the impact of <a href="https://en.wikipedia.org/wiki/Comet_Shoemaker–Levy_9" target="_blank" rel="noopener">Comet Shoemaker-Levy 9</a> on Jupiter (<a href="/public/news/eso9402/">eso9402</a>), and studied the dramatic brightening of the Periodic Comet Schwassmann-Wachmann 3 (<a href="/public/news/eso9601/">eso9601</a>).</p> <p dir="ltr">TIMMI was in constant use from 1992 to 1998, when it was decommissioned because the development of detectors had progressed so rapidly. In fact, in 1993, ESO had already joined a consortium of French institutes to develop a next-generation device based on the array used in TIMMI, and thus TIMMI was replaced by TIMMI2 in 2000.</p> <p>TIMMI2 was built by the <a href="https://www.uni-jena.de" target="_blank" rel="noopener">Friedrich-Schiller-Universität</a> (FSU) in Jena, Germany. It was interfaced to the ESO 3.6-metre telescope with a special infrared adaptor and detected infrared radiation in the mid-infrared spectral region, from 5–24 µm. At the time of its first light, it was the most sensitive and versatile instrument of its kind available in the world and put European astronomy at the forefront of research in this field.</p> <p>TIMMI2 was particularly well-suited for observations of the complex processes that take place in the innermost regions of star-forming clouds. Among the first images taken by TIMMI2 were some of the most penetrating mid-infrared views ever obtained of the central region of the Orion Nebula (<a href="/public/news/eso0113/">eso0113</a>). TIMMI2 was also the first ground-based telescope to detect mid-infrared radiation from Brown Dwarf stars (<a href="https://www.eso.org/public/news/eso0220/">eso0220</a>) and together with a fleet of other ESO instruments, obtained a first glimpse of the very first stages in the formation of heavy stars (<a href="https://www.eso.org/public/news/eso0317/">eso0317</a>).</p> <p>Seeing the Universe in the mid-infrared region opened TIMMI2’s eyes to study a variety of astronomical objects including active galactic nuclei, starburst galaxies, comets, other planets, variable stars, and compact objects like galactic centres, in addition to protoplanetary disks around young stars and brown dwarfs.</p> <p>TIMMI2 was discontinued in 2006.</p> </div> <div class="col-md-4"> <table class="table table-bordered" width="100%"> <tbody> <tr> <td> <h3>TIMMI/2</h3> <p><small>The authoritative technical specifications as offered for astronomical observations are available from the <a href="/sci/facilities/lasilla/instruments/timmi/">Science Operations page</a>.</small></p> <table class="table"> <tbody> <tr> <td valign="top" width="30"><strong>Location:</strong></td> <td valign="top">La Silla (now decommissioned)</td> </tr> <tr> <td valign="top" width="30"><strong>Telescope:</strong></td> <td valign="top"><a href="/public/teles-instr/lasilla/36/">ESO 3.6-m telescope</a></td> </tr> <tr> <td valign="top"><strong>Focus:</strong></td> <td valign="top">Cassegrain</td> </tr> <tr> <td valign="top"><strong>Type:</strong></td> <td valign="top">Multi mode (imaging, polarimetry, and long slit spectroscopy)</td> </tr> <tr> <td valign="top"><strong>Wavelength range:</strong></td> <td valign="top">5–17.5µm (TIMMI), 5–24µm (TIMMI2)</td> </tr> <tr> <td valign="top"><strong>Spatial resolution:</strong></td> <td valign="top">Diffraction limited at the 3.6m telescope: 0.7”@10µm</td> </tr> <tr> <td valign="top"><strong>Spectral resolution:</strong></td> <td valign="top">R~150</td> </tr> <tr> <td valign="top"><strong>First light:</strong></td> <td valign="top">1992 (TIMMI), 2000 (TIMMI2)</td> </tr> <tr> <td valign="top"><strong>Science goal:</strong></td> <td valign="top">To observe in the mid-infrared to study the birth of stars and the formation of planets</td> </tr> <tr> <td valign="top"><strong>Images taken with the instrument:</strong></td> <td valign="top"><a href="/public/images/archive/search/?instrument=41">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=TIMMI2">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=TIMMI2">Link</a></td> </tr> <tr> <td valign="top"><strong>Press Releases with the <strong>instrument</strong>:</strong></td> <td valign="top"><a href="/public/news/archive/search/?published_until_year=0&published_until_day=0&description=&title=&instruments=38&subject_name=&published_since_day=0&published_since_month=0&published_until_month=0&id=&published_since_year=0">TIMMI</a>, <a href="/public/news/archive/search/?published_until_year=0&published_until_day=0&description=&title=&instruments=41&subject_name=&published_since_day=0&published_since_month=0&published_until_month=0&id=&published_since_year=0">TIMMI2</a></td> </tr> <tr> <td valign="top"><strong>Data papers:</strong></td> <td valign="top"> <p><a href="http://telbib.eso.org/index.php?&flimiti=off&fq[]=instrument:TIMMI2">Link</a></p> <p><a href="http://www.eso.org/sci/observing/policies/publications.html">ESO data citation policy</a></p> </td> </tr> <tr> <td valign="top"><strong>Consortium:</strong></td> <td valign="top"> <ul> <li><a href="https://www.uni-jena.de" target="_blank" rel="noopener">Friedrich-Schiller-Universität</a> (FSU) in Jena, Germany</li> <li><a href="https://astro.univie.ac.at/" target="_blank" rel="noopener">Institut für Astrophysik at the University of Vienna</a>, Austria</li> <li>ESO</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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