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id="primary" class="content-area columns__md-8 u-b-margin"> <main id="main" class="site-main"> <article id="post-1408" class="gx-card post-1408 page type-page status-publish hentry"> <div class="gx-card-content"> <header class="entry-header"> <h1 class="entry-title">Science Validation</h1> </header> <div class="entry-content"> <p>The Milky Way Mapper needs fundamental parameters for stars, white dwarfs, and binary systems to complete its science goals. We also desire to understand how results obtained from high-resolution near-IR <a href="/instruments/apogee-spectrographs/">APOGEE </a>spectra compare to results obtained from low-resolution optical <a href="/instruments/boss-spectrographs/">BOSS</a> spectra. More globally, we plan to compare our results with other large-scale spectroscopic surveys of the Milky Way, including <a href="https://www.desi.lbl.gov">DESI</a>, <a href="https://ingconfluence.ing.iac.es:8444/confluence//display/WEAV/The+WEAVE+Project" data-type="URL" data-id="https://ingconfluence.ing.iac.es:8444/confluence//display/WEAV/The+WEAVE+Project">WEAVE</a>, and <a href="https://www.4most.eu/cms/" data-type="URL" data-id="https://www.4most.eu/cms/">4MOST</a>. Therefore, there are several curated cartons implemented or planned for MWM. </p> <div class="wp-block-image"> <figure class="alignleft size-full is-resized"><img fetchpriority="high" decoding="async" src="/wp-content/uploads/2023/01/Comparison_of_planets_and_stars_2017_update.png" alt="" class="wp-image-2588" width="424" height="211" srcset="https://www.sdss.org/wp-content/uploads/2023/01/Comparison_of_planets_and_stars_2017_update.png 847w, https://www.sdss.org/wp-content/uploads/2023/01/Comparison_of_planets_and_stars_2017_update-300x149.png 300w, https://www.sdss.org/wp-content/uploads/2023/01/Comparison_of_planets_and_stars_2017_update-768x382.png 768w" sizes="(max-width: 424px) 100vw, 424px" /><figcaption class="wp-element-caption">The relative sizes of Jupiter, Proxima Centauri, the Sun, and Sirius<br>Image Credit: <a href="https://commons.wikimedia.org/wiki/File:Comparison_of_planets_and_stars_(2017_update).png">JoeyPknowsalotaboutthat</a>, <a href="https://creativecommons.org/licenses/by-sa/4.0">CC BY-SA 4.0</a>, via Wikimedia Commons</figcaption></figure></div> <p>In targeting generation v0.5.3, only one of these cartons has been implemented. However, the extensive data taken on the APOGEE and BOSS instruments will be reduced with the MWM pipelines and used as well, including cluster stars and stars with asteroseismic parameters.</p> <h2 class="wp-block-heading">Cartons</h2> <p>The mwm_legacy_ir2opt carton’s goal is to get BOSS spectra for stars observed by APOGEE to aid in the calibration of BOSS data. The high-quality information from the APOGEE spectra can be used for empirical derivations of stellar parameters from BOSS spectra. This carton uses <a href="https://www.cosmos.esa.int/web/gaia/dr2" target="_blank" rel="noreferrer noopener">Gaia DR2</a> magnitudes to ensure that the stars are not too bright in the optical.</p> <div class="wp-block-pb-accordion-item c-accordion__item js-accordion-item no-js" data-initially-open="false" data-click-to-close="true" data-auto-close="true" data-scroll="false" data-scroll-offset="0"><h4 id="at-14080" class="c-accordion__title js-accordion-controller" role="button">Science Validation Cartons for Targeting Generation v0.5.3<br></h4><div id="ac-14080" class="c-accordion__content"> <ul class="wp-block-list"> <li>mwm_legacy_ir2opt <ul class="wp-block-list"> <li>Target is in APOGEE DR16, in particular the mos_sdss_apogeeallstarmerge_r13 table, available on the <a href="https://data.sdss.org/sas/dr18/mos/target/1.0.1/" data-type="URL" data-id="https://data.sdss.org/sas/dr18/mos/target/1.0.1/">SAS</a> and on <a href="https://skyserver.sdss.org/CasJobs/">CasJobs</a>. </li> <li>13 < G < 18</li> <li>G<sub>BP</sub> > 13</li> <li>G<sub>RP </sub>> 13</li> </ul> </li> </ul> </div></div> <h2 class="wp-block-heading">Cadences</h2> <p>All mwm_legacy_ir2opt use the bright_1x1 cadence on the BOSS instrument.</p> </div> </div> </article> </main> </div> <div class="columns__md-4"> <div class="sidebar__inner"> <aside id="secondary" class="widget-area sidebar-1 h-center-upto-md" aria-label="Sidebar"> <section id="nav_menu-35" class="widget gx-card-content u-b-margin widget_nav_menu"><h3 class="widget-title">Milky Way Mapper</h3><nav class="menu-milky-way-mapper-container" aria-label="Milky Way Mapper"><ul id="menu-milky-way-mapper" class="menu"><li id="menu-item-1308" class="menu-item menu-item-type-post_type menu-item-object-page current-page-ancestor menu-item-1308"><a href="https://www.sdss.org/dr18/mwm/">MWM Overview</a></li> <li id="menu-item-1315" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-1315"><a 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