43
43
Sep 18, 2013
09/13
by
Samaya Nissanke; Michele Vallisneri; Gijs Nelemans; Thomas A. Prince
texts
eye 43
favorite 1
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Compact Galactic binaries where at least one member is a white dwarf or neutron star constitute the majority of individually detectable sources for future low-frequency space-based gravitational-wave (GW) observatories; they also form an unresolved continuum, the dominant Galactic foreground at frequencies below a few mHz. Due to the paucity of electromagnetic observations, the majority of studies of Galactic-binary populations so far have been based on population-synthesis simulations....
Source: http://arxiv.org/abs/1201.4613v2
94
94
Sep 21, 2013
09/13
by
Yu Cao; Susan Terebey; Thomas A. Prince; Charles A. Beichman
texts
eye 94
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An atlas of the Galactic plane (-4.7 deg < b < 4.7 deg) plus the molecular clouds in Orion, Rho Oph, and Taurus-Auriga has been produced at 60 and 100 micron from IRAS data. The Atlas consists of resolution-enhanced coadded images having 1 arcmin -- 2 arcmin resolution as well as coadded images at the native IRAS resolution. The IRAS Galaxy Atlas, together with the DRAO HI line / 21 cm continuum and FCRAO CO (1-0) line Galactic plane surveys, both with similar (approx. 1 arcmin)...
Source: http://arxiv.org/abs/astro-ph/9705147v2
724
724
Sep 22, 2013
09/13
by
Robert E. Rutledge; Robert J. Brunner; Thomas A. Prince; Carol Lonsdale
texts
eye 724
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We quantitatively cross-associate the 18811 ROSAT Bright Source Catalog (RASS/BSC) X-ray sources with optical sources in the USNO-A2 catalog, calculating the the probability of unique association (Pid) between each candidate within 75 arcsec of the X-ray source position, on the basis of optical magnitude and proximity. We present catalogs of RASS/BSC sources for which the probability of association is >98%, >90%, and >50%, which contain 2705, 5492, and 11301 unique USNO-A2 optical...
Source: http://arxiv.org/abs/astro-ph/0004053v2
57
57
Sep 19, 2013
09/13
by
Thomas A. Prince; Massimo Tinto; Shane L. Larson; J. W. Armstrong
texts
eye 57
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The multiple Doppler readouts available on the Laser Interferometer Space Antenna (LISA) permit simultaneous formation of several interferometric observables. All these observables are independent of laser frequency fluctuations and have different couplings to gravitational waves and to the various LISA instrumental noises. Within the functional space of interferometric combinations LISA will be able to synthesize, we have identified a triplet of interferometric combinations that show optimally...
Source: http://arxiv.org/abs/gr-qc/0209039v2
40
40
Sep 17, 2013
09/13
by
Robert J. Brunner; S. George Djorgovski; Thomas A. Prince; Alex S. Szalay
texts
eye 40
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As a scientific discipline, Astronomy is rather unique. We only have one laboratory, the Universe, and we cannot, of course, change the initial conditions and study the resulting effects. On top of this, acquiring Astronomical data has historically been a very labor-intensive effort. As a result, data has traditionally been preserved for posterity. With recent technological advances, however, the rate at which we acquire new data has grown exponentially, which has generated a Data Tsunami,...
Source: http://arxiv.org/abs/astro-ph/0108381v1
115
115
Sep 22, 2013
09/13
by
Robert J. Brunner; S. George Djorgovski; Thomas A. Prince; Alex S. Szalay
texts
eye 115
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Astronomy has a long history of acquiring, systematizing, and interpreting large quantities of data. Starting from the earliest sky atlases through the first major photographic sky surveys of the 20th century, this tradition is continuing today, and at an ever increasing rate. Like many other fields, astronomy has become a very data-rich science, driven by the advances in telescope, detector, and computer technology. Numerous large digital sky surveys and archives already exist, with...
Source: http://arxiv.org/abs/astro-ph/0106481v1
144
144
Jul 20, 2013
07/13
by
Bruce Margon; David Levitan; Thomas A. Prince; Gregg Hallinan; the PTF Collaboration
texts
eye 144
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The Palomar Transient Factory proves to be a prolific source of Magnetic Cataclysmic Variables, selected by their distinctive photometric variability, and followed up spectroscopically. Here, we present six new candidate systems, together with preliminary photometric periods and spectra.
Source: http://arxiv.org/abs/1304.4585v1
5
5.0
Jun 29, 2018
06/18
by
Walid A. Majid; Aaron B. Pearlman; Tatyana Dobreva; Shinji Horiuchi; Jonathon Kocz; Jonas Lippuner; Thomas A. Prince
texts
eye 5
favorite 0
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We have carried out high frequency radio observations of the high magnetic field pulsar PSR J1119-6127 following its recent X-ray outburst. While initial observations showed no evidence of significant radio emission, subsequent observations detected pulsed emission across a large frequency band. In this letter, we report on the initial disappearance of the pulsed emission and its prompt reactivation and dramatic evolution over several months of observation. The periodic pulse profile at S-band...
Topics: Astrophysics, High Energy Astrophysical Phenomena, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1612.02868
3
3.0
Jun 30, 2018
06/18
by
David Levitan; Paul J. Groot; Thomas A. Prince; Shrinivas R. Kulkarni; Russ Laher; Eran O. Ofek; Branimir Sesar; Jason Surace
texts
eye 3
favorite 0
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The AM CVn systems are a class of He-rich, post-period minimum, semi-detached, ultra-compact binaries. Their long-term light curves have been poorly understood due to the few systems known and the long (hundreds of days) recurrence times between outbursts. We present combined photometric light curves from the LINEAR, CRTS, and PTF synoptic surveys to study the photometric variability of these systems over an almost 10 yr period. These light curves provide a much clearer picture of the outburst...
Topics: Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1410.6987
4
4.0
Jun 29, 2018
06/18
by
Chan-Kao Chang; Hsing-Wen Lin; Wing-Huen Ip; Thomas A. Prince; Shrinivas R. Kulkarni; David Levitan; Russ Laher; Jason Surace
texts
eye 4
favorite 0
comment 0
In order to look for large super-fast rotators, five dedicated surveys covering ~ 188 square degree in the ecliptic plane have been carried out in R-band with ~10 min cadence using the intermediate Palomar Transient Factory in late 2014 and early 2015. Among 1029 reliable rotation periods obtained from the surveys, we discovered one new large super-fast rotator, (40511) 1999 RE88, and other 18 candidates. (40511) 1999 RE88 is an S-type inner main-belt asteroid with a diameter of D = 1.9 +- 0.3...
Topics: Earth and Planetary Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1608.07910
36
36
Jun 29, 2018
06/18
by
Adam Waszczak; Thomas A. Prince; Russ Laher; Frank Masci; Brian Bue; Umaa Rebbapragada; Tom Barlow; Jason Surace; George Helou; Shrinivas Kulkarni
texts
eye 36
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Near-Earth asteroids (NEAs) in the 1-100 meter size range are estimated to be $\sim$1,000 times more numerous than the $\sim$15,000 currently-catalogued NEAs, most of which are in the 0.5-10 kilometer size range. Impacts from 10-100 meter size NEAs are not statistically life-threatening but may cause significant regional damage, while 1-10 meter size NEAs with low velocities relative to Earth are compelling targets for space missions. We describe the implementation and initial results of a...
Topics: Earth and Planetary Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1609.08018
3
3.0
Jun 30, 2018
06/18
by
Chan-Kao Chang; Adam Waszczak; Hsing-Wen Lin; Wing-Huen Ip; Thomas. A. Prince; Shrinivas R. Kulkarni; Russ Laher; Jason Surace
texts
eye 3
favorite 0
comment 0
Asteroids of size larger than 150 m generally do not have rotation periods smaller than 2.2 hours. This spin cutoff is believed to be due to the gravitationally bound rubble-pile structures of the asteroids. Rotation with periods exceeding this critical value will cause asteroid breakup. Up until now, only one object, 2001 OE84, has been found to be an exception to this spin cutoff. We report the discovery of a new super-fast rotator, (335433) 2005 UW163, spinning with a period of 1.290 hours...
Topics: Earth and Planetary Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1407.8264
102
102
Sep 19, 2013
09/13
by
Mark H. Finger; Lars Bildsten; Deepto Chakrabarty; Thomas A. Prince; D. Matthew Scott; Colleen A. Wilson; Robert B. Wilson; S. Nan Zhang
texts
eye 102
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We present observations of a series of 10 outbursts of pulsed hard X-ray flux from the transient 10.6 mHz accreting pulsar GS 1843-02, using the Burst and Transient Source Experiment on the Compton Gamma Ray Observatory. These outbursts occurred regularly every 242 days, coincident with the ephemeris of the periodic transient GRO J1849-03 (Zhang et al. 1996), which has recently been identified with the SAS 3 source 2S 1845-024 (Soffitta et al. 1998). Our pulsed detection provides the first...
Source: http://arxiv.org/abs/astro-ph/9812475v1
7
7.0
Jun 29, 2018
06/18
by
Wil Kao; David L. Kaplan; Thomas A. Prince; Sumin Tang; Irina Ene; Kyu Bin Kim; David Levitan; Shrinivas R. Kulkarni; Russ R. Laher
texts
eye 7
favorite 0
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We present a sample of 59 periodic variables from the Palomar Transient Factory, selected from published catalogues of white dwarf (WD) candidates. The variability can likely be attributed to ellipsoidal variation of the tidally distorted companion induced by the gravity of the primary (WD or hot subdwarf) or to the reflection of hot emission by a cooler companion. We searched 11311 spectroscopically or photometrically selected WD candidates from three hot star/WD catalogues, using the...
Topics: Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1606.04627
7
7.0
Jun 29, 2018
06/18
by
Monika D. Soraisam; Marat Gilfanov; Thomas Kupfer; Frank Masci; Allen W. Shafter; Thomas A. Prince; Shrinivas R. Kulkarni; Eran O. Ofek; Eric Bellm
texts
eye 7
favorite 1
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[abridged] In large-scale time-domain surveys, the processing of data, from procurement up to the detection of sources, is generally automated. One of the main challenges is contamination by artifacts, especially in regions of strong unresolved emission. We present a novel method for identifying candidates for variables and transients from the outputs of such surveys' data pipelines. We use the method to systematically search for novae in iPTF observations of the bulge of M31. We demonstrate...
Topics: Astrophysics, Instrumentation and Methods for Astrophysics, Astrophysics of Galaxies
Source: http://arxiv.org/abs/1612.00116
56
56
Sep 19, 2013
09/13
by
Deepto Chakrabarty; Lars Bildsten; Mark H. Finger; John M. Grunsfeld; Danny T. Koh; Robert W. Nelson; Thomas A. Prince; Brian A. Vaughan; Robert B. Wilson
texts
eye 56
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Over five years of daily hard X-ray (>20 keV) monitoring of the 2-min accretion-powered pulsar GX 1+4 with the Compton Gamma Ray Observatory/BATSE large-area detectors has found nearly continuous rapid spin-down, interrupted by a bright 200-d spin-up episode. During spin-down, the torque becomes more negative as the luminosity increases (assuming that the 20-60 keV pulsed flux traces bolometric luminosity), the opposite of what is predicted by standard accretion torque theory. No changes in...
Source: http://arxiv.org/abs/astro-ph/9703047v1
146
146
Jul 19, 2013
07/13
by
Joseph C. Jacob; Daniel S. Katz; G. Bruce Berriman; John Good; Anastasia C. Laity; Ewa Deelman; Carl Kesselman; Gurmeet Singh; Mei-Hui Su; Thomas A. Prince; Roy Williams
texts
eye 146
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Montage is a portable software toolkit for constructing custom, science-grade mosaics by composing multiple astronomical images. The mosaics constructed by Montage preserve the astrometry (position) and photometry (intensity) of the sources in the input images. The mosaic to be constructed is specified by the user in terms of a set of parameters, including dataset and wavelength to be used, location and size on the sky, coordinate system and projection, and spatial sampling rate. Many...
Source: http://arxiv.org/abs/1005.4454v1
67
67
Sep 22, 2013
09/13
by
Robert W. Nelson; Lars Bildsten; Deepto Chakrabarty; Mark H. Finger; Danny T. Koh; Thomas A. Prince; Bradley C. Rubin; D. Mathew Scott; Brian A. Vaughan; Robert B. Wilson
texts
eye 67
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Dramatic torque reversals between spin up and spin down have been observed in half of the persistent X-ray pulsars monitored by the BATSE all-sky monitor on CGRO. Theoretical models developed to explain early pulsar timing data can explain spin down torques via a disk-magnetosphere interaction if the star nearly corotates with the inner accretion disk. To produce the observed BATSE torque reversals, however, these equilibrium models require the disk to alternate between two mass accretion...
Source: http://arxiv.org/abs/astro-ph/9708193v1
54
54
Sep 23, 2013
09/13
by
Sumin Tang; Yi Cao; Lars Bildsten; Peter Nugent; Eric Bellm; Shrinivas R. Kulkarni; Russ Laher; David Levitan; Frank Masci; Eran O. Ofek; Thomas A. Prince; Branimir Sesar; Jason Surace
texts
eye 54
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We report the discovery of R Coronae Borealis (RCB) stars in the Andromeda galaxy (M31) using the Palomar Transient Factory (PTF). RCB stars are rare hydrogen-deficient, carbon-rich supergiant variables, most likely the merger products of two white dwarfs. These new RCBs, including two confirmed ones and two candidates, are the first to be found beyond the Milky Way and the Magellanic Clouds. All of M31 RCBs showed >1.5 mag irregular declines over timescales of weeks to months. Due to the...
Source: http://arxiv.org/abs/1303.1820v2
21
21
Jun 27, 2018
06/18
by
Adam Waszczak; Chan-Kao Chang; Eran O. Ofek; Russ Laher; Frank Masci; David Levitan; Jason Surace; Yu-Chi Cheng; Wing-Huen Ip; Daisuke Kinoshita; George Helou; Thomas A. Prince; Shrinivas Kulkarni
texts
eye 21
favorite 0
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We fit 54,296 sparsely-sampled asteroid lightcurves in the Palomar Transient Factory to a combined rotation plus phase-function model. Each lightcurve consists of 20+ observations acquired in a single opposition. Using 805 asteroids in our sample that have reference periods in the literature, we find the reliability of our fitted periods is a complicated function of the period, amplitude, apparent magnitude and other attributes. Using the 805-asteroid ground-truth sample, we train an automated...
Topics: Astrophysics, Earth and Planetary Astrophysics
Source: http://arxiv.org/abs/1504.04041
51
51
Sep 23, 2013
09/13
by
David Levitan; Thomas Kupfer; Paul J. Groot; Shrinivas R. Kulkarni; Thomas A. Prince; Gregory V. Simonian; Iair Arcavi; Joshua S. Bloom; Russ Laher; Peter E. Nugent; Eran O. Ofek; Branimir Sesar; Jason Surace
texts
eye 51
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We present five new outbursting AM CVn systems and one candidate discovered as part of an ongoing search for such systems using the Palomar Transient Factory (PTF). This is the first large-area, systematic search for AM CVn systems using only large-amplitude photometric variability to select candidates. Three of the confirmed systems and the candidate system were discovered as part of the PTF transient search. Two systems were found as part of a search for outbursts through the PTF photometric...
Source: http://arxiv.org/abs/1212.5312v1
5
5.0
Jun 30, 2018
06/18
by
Sumin Tang; David L. Kaplan; Sterl Phinney; Thomas A. Prince; Rene P. Breton; Eric Bellm; Lars Bildsten; Yi Cao; A. K. H. Kong; Daniel A. Perley; Branimir Sesar; William M. Wolf; T. -C. Yen
texts
eye 5
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We report the optical identification of the companion to the {\it Fermi} black widow millisecond pulsar PSR J1544+4937. We find a highly variable source on Keck LRIS images at the nominal pulsar position, with 2 magnitude variations over orbital period in the B, g, R, and I bands. The nearly achromatic light curves are difficult to explain with a simply irradiated hemisphere model, and suggest that the optical emission is dominated by a nearly isothermal hot patch on the surface of the...
Topics: High Energy Astrophysical Phenomena, Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1407.0081
13
13
Jun 28, 2018
06/18
by
Chan-Kao Chang; Wing-Huen Ip; Hsing-Wen Lin; Yu-Chi Cheng; Chow-Choong Ngeow; Ting-Chang Yang; Adam Waszczak; Shrinivas R. Kulkarni; David Levitan; Branimir Sesar; Russ Laher; Jason Surace; Thomas. A. Prince
texts
eye 13
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Two dedicated asteroid rotation-period surveys have been carried out using data taken on January 6-9 and February 20-23 of 2014 by the Intermediate Palomar Transient Factory (iPTF) in the $R$~band with $\sim 20$-min cadence. The total survey area covered 174~deg$^2$ in the ecliptic plane. Reliable rotation periods for 1,438 asteroids are obtained from a larger data set of 6,551 mostly main-belt asteroids, each with $\geq 10$~detections. Analysis of 1751, PTF based, reliable rotation periods...
Topics: Earth and Planetary Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1506.08493
4
4.0
Jun 30, 2018
06/18
by
David Levitan; Thomas Kupfer; Paul J. Groot; Bruce Margon; Thomas A. Prince; Shrinivas R. Kulkarni; Gregg Hallinan; Leon K. Harding; Gillian Kyne; Russ Laher; Eran O. Ofek; René G. M. Rutten; Branimir Sesar; Jason Surace
texts
eye 4
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We report on PTF1 J191905.19+481506.2, a newly discovered, partially eclipsing, outbursting AM CVn system found in the Palomar Transient Factory synoptic survey. This is only the second known eclipsing AM CVn system. We use high-speed photometric observations and phase-resolved spectroscopy to establish an orbital period of 22.4559(3) min. We also present a long-term light curve and report on the normal and super-outbursts regularly seen in this system, including a super-outburst recurrence...
Topics: Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1402.7129
98
98
Sep 22, 2013
09/13
by
Lars Bildsten; Deepto Chakrabarty; John Chiu; Mark H. Finger; Danny T. Koh; Robert W. Nelson; Thomas A. Prince; Bradley C. Rubin; D. Matthew Scott; Mark Stollberg; Brian A. Vaughan; Colleen A. Wilson; Robert B. Wilson
texts
eye 98
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We summarize five years of continuous monitoring of accretion-powered pulsars with the Burst and Transient Source Experiment (BATSE) on the Compton Gamma Ray Observatory. Our 20-70 keV observations have determined or refined the orbital parameters of 13 binaries, discovered 5 new transient accreting pulsars, measured the pulsed flux history during outbursts of 12 transients (GRO J1744-28, 4U 0115+634, GRO J1750-27, GS 0834-430, 2S 1417-624, GRO J1948+32, EXO 2030+375, GRO J1008-57, A 0535+26,...
Source: http://arxiv.org/abs/astro-ph/9707125v2
8
8.0
Jun 30, 2018
06/18
by
Chan-Kao Chang; Wing-Huen Ip; Hsing-Wen Lin; Yu-Chi Cheng; Chow-Choong Ngeow; Ting-Chang Yang; Adam Waszczak; Shrinivas R. Kulkarni; David Levitan; Branimir Sesar; Russ Laher; Jason Surace; Thomas. A. Prince; the PTF Team
texts
eye 8
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A new asteroid rotation period survey have been carried out by using the Palomar Transient Factory (PTF). Twelve consecutive PTF fields, which covered an area of 87 deg$^2$ in the ecliptic plane, were observed in $R$ band with a cadence of $\sim$20 min during February 15--18, 2013. We detected 2500 known asteroids with a diameter range of 0.5 km $\leq D \leq$ 200 km. Of these, 313 objects had highly reliable rotation periods and exhibited the "spin barrier" at $\sim2$ hours. In...
Topics: Earth and Planetary Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1405.1144
12
12
Jun 30, 2018
06/18
by
Sumin Tang; Lars Bildsten; William M. Wolf; K. L. Li; Albert K. H. Kong; Yi Cao; S. Bradley Cenko; Annalisa De Cia; Mansi M. Kasliwal; Shrinivas R. Kulkarni; Russ Laher; Frank Masci; Peter E. Nugent; Daniel A. Perley; Thomas A. Prince; Jason Surace
texts
eye 12
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comment 0
The iPTF detection of the most recent outburst of the recurrent nova system RX J0045.4+4154 in the Andromeda Galaxy has enabled the unprecedented study of a massive ($M>1.3\ M_\odot$) accreting white dwarf (WD). We detected this nova as part of the near daily iPTF monitoring of M31 to a depth of $R\approx 21$\,mag and triggered optical photometry, spectroscopy and soft X-ray monitoring of the outburst. Peaking at an absolute magnitude of $M_R=-6.6$ mag, and with a decay time of 1 mag per...
Topics: High Energy Astrophysical Phenomena, Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1401.2426
123
123
Jul 20, 2013
07/13
by
David Levitan; Benjamin J. Fulton; Paul J. Groot; Shrinivas R. Kulkarni; Eran O. Ofek; Thomas A. Prince; Avi Shporer; Joshua S. Bloom; S. Bradley Cenko; Mansi M. Kasliwal; Nicholas M. Law; Peter E. Nugent; Dovi Poznanski; Robert M. Quimby; Assaf Horesh; Branimir Sesar; Assaf Sternberg
texts
eye 123
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We present extensive photometric and spectroscopic observations of PTF1 J071912.13+485834.0, an outbursting AM CVn system discovered by the Palomar Transient Factory (PTF). AM CVn systems are stellar binaries with some of the smallest separations known and orbital periods ranging from 5 to 65 minutes. They are believed to be composed of a white dwarf accretor and a (semi)-degenerate He-rich donor and are considered to be the helium equivalents of Cataclysmic Variables. We have spectroscopically...
Source: http://arxiv.org/abs/1107.1209v1
5
5.0
Jun 29, 2018
06/18
by
Thomas Kupfer; Jan van Roestel; Jared Brooks; Stephan Geier; Tom R. Marsh; Paul J. Groot; Steven Bloemen; Thomas A. Prince; Eric Bellm; Ulrich Heber; Lars Bildsten; Adam A. Miller; Martin J. Dyer; Vik S. Dhillon; Matthew Green; Puji Irawati; Russ Laher; Stuart P. Littlefair; David L. Shupe; Charles C. Steidel; Somsawat Rattansoon; Max Pettini
texts
eye 5
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We present the discovery of the hot subdwarf B star (sdB) binary PTF1 J082340.04+081936.5. The system has an orbital period P$_{\rm orb}=87.49668(1)$ min (0.060761584(10) days), making it the second-most compact sdB binary known. The lightcurve shows ellipsoidal variations. Under the assumption that the sdB primary is synchronized with the orbit, we find a mass $M_{\rm sdB}=0.45^{+0.09}_{-0.07}$ M$_\odot$, a companion white dwarf mass $M_{\rm WD}=0.46^{+0.12}_{-0.09}$ M$_\odot$ and a mass ratio...
Topics: Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1612.02019
6
6.0
Jun 29, 2018
06/18
by
Jacob E. Jencson; Mansi M. Kasliwal; Joel Johansson; Carlos Contreras; Sergio Castellón; Howard E. Bond; Andrew J. Monson; Frank J. Masci; Ann Marie Cody; Jennifer E. Andrews; John Bally; Yi Cao; Ori D. Fox; Timothy Gburek; Robert D. Gehrz; Wayne Green; George Helou; Eric Hsiao; Nidia Morrell; Mark Phillips; Thomas A. Prince; Robert A. Simcoe; Nathan Smith; Samaporn Tinyanont; Robert Williams
texts
eye 6
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SPIRITS---SPitzer InfraRed Intensive Transients Survey---is an ongoing survey of nearby galaxies searching for infrared (IR) transients with Spitzer/IRAC. We present the discovery and follow-up observations of one of our most luminous ($M_{[4.5]} = -17.1\pm0.4$ mag, Vega) and red ($[3.6] - [4.5] = 3.0 \pm 0.2$ mag) transients, SPIRITS 15c. The transient was detected in a dusty spiral arm of IC 2163 ($D\approx35.5$ Mpc). Pre-discovery ground-based imaging revealed an associated, shorter-duration...
Topics: Astrophysics, High Energy Astrophysical Phenomena, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1609.04444
8
8.0
Jun 28, 2018
06/18
by
Eric C. Bellm; David L. Kaplan; Rene P. Breton; E. Sterl Phinney; Varun B. Bhalerao; Fernando Camilo; Sumit Dahal; S. G. Djorgovski; Andrew J. Drake; J. W. T. Hessels; Russ R. Laher; David B. Levitan; Fraser Lewis; Ashish A. Mahabal; Eran O. Ofek; Thomas A. Prince; Scott M. Ransom; Mallory S. E. Roberts; David M. Russell; Branimir Sesar; Jason A. Surace; Sumin Tang
texts
eye 8
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PSR J2129-0429 is a "redback" eclipsing millisecond pulsar binary with an unusually long 15.2 hour orbit. It was discovered by the Green Bank Telescope in a targeted search of unidentified Fermi gamma-ray sources. The pulsar companion is optically bright (mean $m_R = 16.6$ mag), allowing us to construct the longest baseline photometric dataset available for such a system. We present ten years of archival and new photometry of the companion from LINEAR, CRTS, PTF, the Palomar 60-inch,...
Topics: High Energy Astrophysical Phenomena, Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1510.00721
5
5.0
Jun 30, 2018
06/18
by
Russ R. Laher; Jason Surace; Carl J. Grillmair; Eran O. Ofek; David Levitan; Branimir Sesar; Julian C. van Eyken; Nicholas M. Law; George Helou; Nouhad Hamam; Frank J. Masci; Sean Mattingly; Ed Jackson; Eugean Hacopeans; Wei Mi; Steve Groom; Harry Teplitz; Vandana Desai; David Hale; Roger Smith; Richard Walters; Robert Quimby; Mansi Kasliwal; Assaf Horesh; Eric Bellm; Tom Barlow; Adam Waszczak; Thomas A. Prince; Shrinivas R. Kulkarni
texts
eye 5
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The Palomar Transient Factory (PTF) is a multi-epochal robotic survey of the northern sky that acquires data for the scientific study of transient and variable astrophysical phenomena. The camera and telescope provide for wide-field imaging in optical bands. In the five years of operation since first light on December 13, 2008, images taken with Mould-R and SDSS-g' camera filters have been routinely acquired on a nightly basis (weather permitting), and two different H-alpha filters were...
Topics: Instrumentation and Methods for Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1404.1953
11
11
Jun 30, 2018
06/18
by
Mansi M. Kasliwal; John Bally; Frank Masci; Ann Marie Cody; Howard E. Bond; Jacob E. Jencson; Samaporn Tinyanont; Yi Cao; Carlos Contreras; Devin A. Dykhoff; Samuel Amodeo; Lee Armus; Martha Boyer; Matteo Cantiello; Robert L. Carlon; Alexander C. Cass; David Cook; David T. Corgan; Joseph Faella; Ori D. Fox; Wayne Green; Robert Gehrz; George Helou; Eric Hsiao; Joel Johansson; Rubab M. Khan; Ryan M. Lau; Norbert Langer; Emily Levesque; Peter Milne; Shazrene Mohamed; Nidia Morrell; Andy Monson;...
texts
eye 11
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We present an ongoing, systematic search for extragalactic infrared transients, dubbed SPIRITS --- SPitzer InfraRed Intensive Transients Survey. In the first year, using Spitzer/IRAC, we searched 190 nearby galaxies with cadence baselines of one month and six months. We discovered over 1958 variables and 43 transients. Here, we describe the survey design and highlight 14 unusual infrared transients with no optical counterparts to deep limits, which we refer to as SPRITEs (eSPecially Red...
Topics: Solar and Stellar Astrophysics, Astrophysics, High Energy Astrophysical Phenomena
Source: http://arxiv.org/abs/1701.01151
