Journal Article

Millisecond dips in the 2007–09 <i>RXTE</i>/PCA light curve of Sco X-1 and one possible occultation event

Hsiang-Kuang Chang, Chih-Yuan Liu and Kuan-Ting Chen

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 411, issue 1, pages 427-434
Published in print February 2011 | ISSN: 0035-8711
Published online January 2011 | e-ISSN: 1365-2966 | DOI:
Millisecond dips in the 2007–09 RXTE/PCA light curve of Sco X-1 and one possible occultation event

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Serendipitous stellar occultation search is so far the only way to detect the existence of very small, very dim, remote objects in the Solar system. To date, however, there are only very few reported detections for trans-Neptunian objects (TNOs) in optical bands. In the X-ray band, with the RXTE/PCA data of Sco X-1 taken from 2007 June to 2009 October, we found one possible X-ray occultation event. We discuss the veracity and properties of this event, and suggest upper limits to the size distribution of TNOs at hectometre size and of main-belt asteroids at decametre size.

Keywords: occultation; Kuiper belt: general; minor planets, asteroids: general; planets and satellites: formation; stars: neutron; X-rays: binaries

Journal Article.  6515 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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