Noah Brosch

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Cataclysmic variables (classical novae and dwarf novae) are binary star systems in which a red dwarf transfers hydrogen-rich matter, by way of an accretion disk, to its white dwarf companion. In dwarf novae, an instability is believed to episodically dump much of the accretion disk onto the white dwarf. The liberation of gravitational potential energy then(More)
Michael J.S. Belton a,⇑, Karen J. Meech , Steven Chesley , Jana Pittichová , Brian Carcich , Michal Drahus , Alan Harris , Stephen Gillam , Joseph Veverka , Nicholas Mastrodemos , William Owen , Michael F. A’Hearn , S. Bagnulo , J. Bai , L. Barrera , Fabienne Bastien , James M. Bauer , J. Bedient , B.C. Bhatt , Hermann Boehnhardt, N. Brosch , Marc Buie ,(More)
The Palomar Transient Factory (PTF) is a synoptic survey designed to explore the transient and variable sky in a wide variety of cadences. We use PTF observations of fields that were observed multiple times ( 10) per night, for several nights, to find asteroids, construct their light curves and measure their rotation periods. Here we describe the pipeline(More)
In preparation for the full Arecibo Legacy Fast ALFA extragalactic HI survey, precursor observations were carried out in Aug–Sep 2004 with the 7-beam Arecibo L-band feed array (ALFA) receiver system and the WAPP spectral processors. While these observations were geared mainly at testing and debugging survey strategy, hardware and software, approximately 48(More)
The time domain is under-exploited in an astrophysical context, because the large photographic plate collections are almost never consulted by young astronomers. This is a result of lack of education of the more recent generations of astronomers, and of the deluge of terabyte-size datasets produced by new observations. Yet astronomical plates represent a(More)
We report the discovery of a ∼500 kpc HI extension southwest of the Virgo Cluster HI-rich pair NGC 4532/DDO 137, detected as part of the Arecibo Legacy Fast ALFA (ALFALFA) Survey. The feature is the longest and most massive HI tail structure so far found in the Virgo Cluster and, at 1.8 Mpc from M87, the most distant from the main concentration of the(More)
We investigate a uniform sample of 113 light curves of meteors collected at the Wise Observatory in November 2002 during a campaign to observe the Leonid meteor shower. We use previously defined descriptors, such as the classical skewness parameter F and a recently-defined pointedness variable P , along with a number of other measurable or derived(More)
We present the first installment of HI sources extracted from the Arecibo Legacy Fast ALFA (ALFALFA) extragalactic survey, initiated in 2005. Sources have been extracted from 3-D spectral data cubes exploiting a matched filtering technique and then examined interactively to yield global HI parameters. A total of 730 HI detections are catalogued within the(More)