First loosely coherent search for continuous gravitational wave sources with substellar companions in the Orion spur

We report on the first loosely coherent search for continuous gravitational waves from neutron stars in binary systems. We searched <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mo>≈</a:mo><a:mn>0.01</a:mn><a:mtext> </a:mtext><a:mtext> </a:mtext><a:mi>sr</a:mi></a:math> in the Orion spur, a high stellar density region close to Earth. We covered gravitational wave frequencies from 100 to 700 Hz and frequency derivatives in the range <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mo>±</c:mo><c:msup><c:mn>10</c:mn><c:mrow><c:mo>−</c:mo><c:mn>11</c:mn></c:mrow></c:msup><c:mtext> </c:mtext><c:mtext> </c:mtext><c:mi>Hz</c:mi><c:mo>/</c:mo><c:mi mathvariant="normal">s</c:mi></c:math>. An atlas of results from the search is made publicly available. A follow-up was performed, on a subset of the released results, which found no outliers.