A new access to SIMBAD TAP in astroquery

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</div> <h1 aria-label="Page title"> A new access to SIMBAD TAP in astroquery </h1> </header> <div class="search-container" data-pagefind-ignore> <div class="modal-background"></div> <div class="search-form"> <input type="text" placeholder="Mots 脿 chercher..." /> </div> <div class="search-result hidden"> <div class="message">D茅sol茅 ! Aucune page trouv茅e avec les mots <code class="terms"></code></div> <div class="filters"></div> <ul class="results"></ul> </div> </div> <div class=" main-wrapper" > <main data-pagefind-body> <div class="pageDates"> <strong>Cr茅ation:</strong> <span title="April 05, 2024 - 10:32 UTC">April 05, 2024 - 12:32 CEST</span> <br/> <strong>Modification:</strong> <span title="December 01, 2024 - 04:04 UTC">December 01, 2024 - 05:04 CET</span> </div> <p>The latest version of the python library <a href="https://astroquery.readthedocs.io/en/latest/"target="_blank" rel="noopener">astroquery</a> (v0.4.7) ships a new access to SIMBAD TAP.</p> <p>The detailed documentation is on <a href="https://astroquery.readthedocs.io/en/latest/simbad/simbad.html#query-tap"target="_blank" rel="noopener">astroquery's page</a>, but here is a quick preview of some of the new functionalities:</p> <h2 id="simple-simbad-tap-access">Simple SIMBAD TAP access <a href="#simple-simbad-tap-access" class="quick-link" title="Quick link on this section."></a></h2><p>You can now call <code>query_tap</code> directly. Let's, for example, look for stars in 5 degrees around M13 where SIMBAD references a flux in the U band:</p> <div class="highlight"><pre tabindex="0" style=";-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-python" data-lang="python"><span style="display:flex;"><span><span style="color:#008000;font-weight:bold">from</span> <span style="color:#00f;font-weight:bold">astroquery.simbad</span> <span style="color:#008000;font-weight:bold">import</span> Simbad </span></span><span style="display:flex;"><span><span style="color:#008000;font-weight:bold">from</span> <span style="color:#00f;font-weight:bold">astropy.coordinates</span> <span style="color:#008000;font-weight:bold">import</span> SkyCoord </span></span><span style="display:flex;"><span><span style="color:#408080;font-style:italic"># first, we call sesame to find M13 coordinates</span> </span></span><span style="display:flex;"><span>m13 <span style="color:#666">=</span> SkyCoord<span style="color:#666">.</span>from_name(<span style="color:#ba2121">"M13"</span>) </span></span><span style="display:flex;"><span><span style="color:#408080;font-style:italic"># then we create an ADQL query</span> </span></span><span style="display:flex;"><span>adql <span style="color:#666">=</span> <span style="color:#ba2121">rf</span><span style="color:#ba2121">"""SELECT main_id, otype, flux, filter, bibcode AS flux_reference </span></span></span><span style="display:flex;"><span><span style="color:#ba2121">-- join the tables "basic" and "flux" </span></span></span><span style="display:flex;"><span><span style="color:#ba2121">FROM flux JOIN basic ON oidref = oid </span></span></span><span style="display:flex;"><span><span style="color:#ba2121">-- take the filter 'U' </span></span></span><span style="display:flex;"><span><span style="color:#ba2121">WHERE filter = 'U' </span></span></span><span style="display:flex;"><span><span style="color:#ba2121">-- select any object which main type descends from Star </span></span></span><span style="display:flex;"><span><span style="color:#ba2121">AND otype = 'Star..' </span></span></span><span style="display:flex;"><span><span style="color:#ba2121">-- and add the coordinates condition </span></span></span><span style="display:flex;"><span><span style="color:#ba2121">AND CONTAINS(POINT('ICRS', ra, dec), CIRCLE('ICRS', </span><span style="color:#b68;font-weight:bold">{</span>m13<span style="color:#666">.</span>ra<span style="color:#666">.</span>deg<span style="color:#b68;font-weight:bold">}</span><span style="color:#ba2121">, </span><span style="color:#b68;font-weight:bold">{</span>m13<span style="color:#666">.</span>dec<span style="color:#666">.</span>deg<span style="color:#b68;font-weight:bold">}</span><span style="color:#ba2121">, 5)) = 1 </span></span></span><span style="display:flex;"><span><span style="color:#ba2121">"""</span> </span></span><span style="display:flex;"><span>Simbad<span style="color:#666">.</span>query_tap(adql) </span></span></code></pre></div><pre tabindex="0"><code><Table length=58> main_id otype flux filter flux_reference object object float32 object object ----------------------- ------ ------- ------ ------------------- HD 151428 ** 7.85 U 1986A&AS...65..405O LSPM J1639+4124E PM* 16.13 U 2005MNRAS.358..333G GD 358 WD* 12.511 U 2013AJ....146..131L UCAC4 625-052116 * 18.075 U 2013AJ....146..131L UCAC4 613-056337 * 15.186 U 2013AJ....146..131L * nu.02 CrB PM* 8.8 U 2002yCat.2237....0D ... ... ... ... ... 2MASS J16342453+4059547 PM* 15.11 U 2005MNRAS.358..333G 2MASS J16382119+4122543 PM* 15.05 U 2005MNRAS.358..333G TYC 3066-2095-1 * 13.43 U 2005MNRAS.358..333G TYC 3074-1095-1 * 13.22 U 2005MNRAS.358..333G V* HZ Her LXB 11.9 U 2007A&A...469..807L PG 1636+351 WD* 13.585 U 2013AJ....146..131L </code></pre><h2 id="mix-your-own-tables-in-the-query">Mix your own tables in the query <a href="#mix-your-own-tables-in-the-query" class="quick-link" title="Quick link on this section."></a></h2><p>This new method also provides an easy way to join your own table(s) with Simbad tables within an ADQL query (this is like the <code>upload table</code> functionality on the SIMBAD TAP webpage):</p> <div class="highlight"><pre tabindex="0" style=";-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-python" data-lang="python"><span style="display:flex;"><span><span style="color:#008000;font-weight:bold">from</span> <span style="color:#00f;font-weight:bold">astroquery.simbad</span> <span style="color:#008000;font-weight:bold">import</span> Simbad </span></span><span style="display:flex;"><span><span style="color:#008000;font-weight:bold">from</span> <span style="color:#00f;font-weight:bold">astropy.table</span> <span style="color:#008000;font-weight:bold">import</span> Table </span></span><span style="display:flex;"><span>list_of_objects <span style="color:#666">=</span> Table([[<span style="color:#ba2121">"M1"</span>, <span style="color:#ba2121">"M2"</span>, <span style="color:#ba2121">"M3"</span>]], names<span style="color:#666">=</span>[<span style="color:#ba2121">"messier_id"</span>]) </span></span><span style="display:flex;"><span>adql <span style="color:#666">=</span> <span style="color:#ba2121">"""SELECT main_id, messier_id, ra, dec, otype FROM basic </span></span></span><span style="display:flex;"><span><span style="color:#ba2121">JOIN messiers </span></span></span><span style="display:flex;"><span><span style="color:#ba2121">ON basic.main_id = messiers.messier_id </span></span></span><span style="display:flex;"><span><span style="color:#ba2121">"""</span> </span></span><span style="display:flex;"><span>Simbad<span style="color:#666">.</span>query_tap(adql, messiers<span style="color:#666">=</span>list_of_objects) </span></span></code></pre></div><pre tabindex="0"><code><Table length=3> main_id messier_id ra dec otype deg deg object object float64 float64 object ------- ---------- ------------------ ------------------- ------ M 1 M1 83.6287 22.0147 SNR M 2 M2 323.36258333333336 -0.8232499999999998 GlC M 3 M3 205.5484166666666 28.37727777777778 GlC </code></pre><p>Note that we created an astropy Table from scratch so that the example would be self-contained, but you can also do this with a table read from any file format that astropy understands.</p> <p>If you have any feedback, don't hesitate to contact us!</p> <div class="paginate" data-pagefind-ignore><a class="prev-page" href="https://cds.unistra.fr/fr/news/2024/06/20-service-outage/"><i class="icon-arrow-right"></i> <small>Service outage</small></a><a class="top-page" href="https://cds.unistra.fr/fr/news/">Sommaire</a><a class="next-page" href="https://cds.unistra.fr/fr/news/2024/03/28-easter-egg-hunt/"><small>Easter Egg Hunt</small> <i class="icon-arrow-left"></i></a> </div> </main> </div> <div class="void-wrapper for-footer" data-pagefind-ignore>  <footer class="cds-footer for-cds" data-pagefind-ignore> 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A new access to SIMBAD TAP in astroquery