PRELIMINARY RESULTS FROM NEOWISE: AN ENHANCEMENT TO THE<i>WIDE-FIELD INFRARED SURVEY EXPLORER</i>FOR SOLAR SYSTEM SCIENCE

Mainzer, Amy; Bauer, J. M.; Grav, T.; Masiero, J.; Cutri, R. M.; Dailey, J.; Eisenhardt, Peter; McMillan, R. S.; Wright, E. L.; Walker, Russell G.; Jedicke, Robert; Spahr, T. B.; Tholen, David J.; Alles, R.; Beck, R.; Brandenburg, H.; Conrow, T.; Evans, T. M.; Fowler, J. W.; Jarrett, T. H.; Marsh, Ken; Masci, Frank J.; McCallon, H.; Wheelock, S.; Wittman, M.; Wyatt, P.; DeBaun, E.; Elliott, G. T.; Elsbury, D.; Gautier, T. N.; Gomillion, S.; Leisawitz, David; Maleszewski, C.; Micheli, M.; Wilkins, Ashlee

doi:10.1088/0004-637x/731/1/53

Cited by 735 publications

(500 citation statements)

References 68 publications

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“…The neutral to moderately red slopes, 0%-3% per 0.1 μm, are potentially the most consistent with the suggested Q or V spectral types. The chosen range of η is based on the distribution of beaming parameters in WISE observations of near-Earth objects (Mainzer et al 2011). For each combination of S and η, we let diameter, D, and geometric albedo, A p , vary freely.…”

Section: Resultsmentioning

confidence: 99%

“…Most do not display a coma or tail; however, these "sporadic" objects are designated as comets since all prior objects seen at these distances have been of apparently cometary origin. This assumption is reasonable given that SOHOʼs limiting magnitude would necessitate a bare asteroid being 10 km in diameter to be observed; numerous such large objects are unlikely to be missed in the modern survey era, especially by NEOWISE where they would be particularly bright (Mainzer et al 2011). Although these objects are almost certainly active when in the SOHO fields of view (0.15 au), this activity is not necessarily due to the traditional "cometary" mechanism of sublimation of volatile ices.…”

Section: Introductionmentioning

confidence: 99%

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Comet 322p/Soho 1: An Asteroid With the Smallest Perihelion Distance?*

Knight

Fitzsimmons

Kelley

et al. 2016

ApJL

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We observed comet 322P/SOHO 1 (P/1999 R1) from the ground and with the Spitzer Space Telescope when it was between 2.2 and 1.2 au from the Sun. These are the first observations of any Solar and Heliospheric Observatory (SOHO)-discovered periodic comet by a non-solar observatory and allow us to investigate its behavior under typical cometary circumstances. 322P appeared inactive in all images. Its light curve suggests a rotation period of 2.8 ± 0.3 hr and has an amplitude 0.3 mag, implying a density of at least 1000 kg m −3 , considerably higher than that of any known comet. It has average colors of ¢ -¢ =  g r 0.52 0.04 and ¢ -¢ =  r i 0.03 0.06. We converted these to Johnson colors and found that the V − R color is consistent with average cometary colors, but R − I is somewhat bluer; these colors are most similar to V-and Q-type asteroids. Modeling of the optical and IR photometry suggests it has a diameter of 150-320 m and a geometric albedo of 0.09-0.42, with diameter and albedo inversely related. Our upper limits to any undetected coma are still consistent with a sublimation lifetime shorter than the typical dynamical lifetimes for Jupiter-family comets. These results suggest that 322P may be of asteroidal origin and only active in the SOHO fields of view via processes different from the volatile-driven activity of traditional comets. If so, it has the smallest perihelion distance of any known asteroid.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comet 322p/Soho 1: An Asteroid With the Smallest Perihelion Distance?*

Knight

Fitzsimmons

Kelley

et al. 2016

ApJL

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“…In the Southern sky (δ < −20 • ), there is very little SDSS data. Nevertheless, the availability and coverage of the AllWISE catalogue (Mainzer et al 2011) allows us to use period and colour information to broadly separate distinct types of variability.…”

Section: Discussionmentioning

confidence: 99%

The Catalina Surveys Southern periodic variable star catalogue

Drake

Djorgovski

Catelan

et al. 2017

Monthly Notices of the Royal Astronomical Society

167

133

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Here, we present the results from our analysis of 6 yr of optical photometry taken by the Siding Spring Survey (SSS). This completes a search for periodic variable stars within the 30 000 deg 2 of the sky covered by the Catalina Surveys. The current analysis covers 81 million sources with declinations between −20 • and −75 • with median magnitudes in the range 11 < V < 19.5. We find approximately 34 000 new periodic variable stars in addition to the ∼9000 RR Lyrae that we previously discovered in SSS data. This brings the total number of periodic variables identified in Catalina data to ∼110 000. The new SSS periodic variable stars mainly consist of eclipsing binaries, RR Lyrae, LPVs, RS CVn stars, δ Scutis, and Anomalous Cepheids. By cross-matching these variable stars with those from prior surveys, we find that ∼90 per cent of the sources are new discoveries and recover ∼95 per cent of the known periodic variables in the survey region. For the known sources, we find excellent agreement between our catalogue and prior values of luminosity, period, and amplitude. However, we find many variable stars that had previously been misclassified. Examining the distribution of RR Lyrae, we find a population associated with the Large Magellanic Cloud (LMC) that extends more than 20 • from its centre confirming recent evidence for the existence of a very extended stellar halo in the LMC. By combining SSS photometry with Dark Energy Survey data, we identify additional LMC halo RR Lyrae, thus confirming the significance of the population.

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“…The approximate flux limits of the AO13 portion of the Stripe 82X survey are 2.2×10 −15 erg s −1 cm −2 , 1.3×10 −14 erg s −1 cm −2 , and 6.7×10 −15 erg s −1 cm −2 , in the soft (0.5-2 keV), hard (2-10 keV), and full (0.5-10 keV) bands. From matching the X-ray source list to available multiwavelength catalogs, including SDSS (Ahn et al 2012;Jiang et al 2014), WISE (Wright et al 2010;Mainzer et al 2011), UKIDSS (Hewett et al 2006;Casali et al 2007;Lawrence et al 2007;Warren et al 2007), VHS (McMahon et al 2013), GALEX (Morrissey et al 2007), FIRST Helfand et al 2015), and Herschel (Viero et al 2014), we identified reliable counterparts for 93% of the sample. About 29% of the X-ray sources are classified via spectroscopic redshifts.…”

Section: Resultsmentioning

confidence: 95%

“…Since publishing our initial Stripe 82X multi-wavelength matched catalogs in LaMassa et al (2013a), the AllWISE Source Catalog was released, combining data from the cryogenic and NEOWISE missions (Wright et al 2010;Mainzer et al 2011). As this catalog has enhanced sensitivity and astrometric precision, we match the XMM-Newton AO13 X-ray source list to this release, and update the archival Chandra and XMM-Newton and XMM-Newton AO10 matches to AllWISE, as detailed in the appendix.…”

Section: Wisementioning

confidence: 99%

THE 31 DEG² RELEASE OF THE STRIPE 82 X-RAY SURVEY: THE POINT SOURCE CATALOG

LaMassa

Urry²,

Cappelluti

et al. 2016

ApJ

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We release the next installment of the Stripe 82 X-ray survey point-source catalog, which currently covers 31.3 deg 2 of the Sloan Digital Sky Survey (SDSS) Stripe 82 Legacy field. In total, 6181 unique X-ray sources are significantly detected with XMM-Newton (>5σ) and Chandra (>4.5σ). This catalog release includes data from XMM-Newton cycle AO 13, which approximately doubled the Stripe 82X survey area. The flux limits of the Stripe 82X survey are 8.7×10 −16 erg s −1 cm −2 , 4.7×10 −15 erg s −1 cm −2 , and 2.1×10 −15 erg s −1 cm −2 in the soft (0.5-2 keV), hard (2-10 keV), and full bands (0.5-10 keV), respectively, with approximate half-area survey flux limits of 5.4×10 −15 erg s −1 cm −2 , 2.9×10 −14 erg s −1 cm −2 , and 1.7×10 −14 erg s −1 cm −2 . We matched the X-ray source lists to available multi-wavelength catalogs, including updated matches to the previous release of the Stripe 82X survey; 88% of the sample is matched to a multi-wavelength counterpart. Due to the wide area of Stripe 82X and rich ancillary multi-wavelength data, including coadded SDSS photometry, mid-infrared WISE coverage, near-infrared coverage from UKIDSS and VISTA Hemisphere Survey, ultraviolet coverage from GALEX, radio coverage from FIRST, and far-infrared coverage from Herschel, as well as existing ∼30% optical spectroscopic completeness, we are beginning to uncover rare objects, such as obscured high-luminosity active galactic nuclei at high-redshift. The Stripe 82X point source catalog is a valuable data set for constraining how this population grows and evolves, as well as for studying how they interact with the galaxies in which they live.

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PRELIMINARY RESULTS FROM NEOWISE: AN ENHANCEMENT TO THEWIDE-FIELD INFRARED SURVEY EXPLORERFOR SOLAR SYSTEM SCIENCE

Abstract: The Wide-field Infrared Survey Explorer has surveyed the entire sky at four infrared wavelengths with greatly improved sensitivity and spatial resolution compared to its predecessors, the Infrared Astronomical Satellite and the Cosmic

Cited by 735 publications

References 68 publications

Comet 322p/Soho 1: An Asteroid With the Smallest Perihelion Distance?*

Comet 322p/Soho 1: An Asteroid With the Smallest Perihelion Distance?*

The Catalina Surveys Southern periodic variable star catalogue

THE 31 DEG² RELEASE OF THE STRIPE 82 X-RAY SURVEY: THE POINT SOURCE CATALOG

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PRELIMINARY RESULTS FROM NEOWISE: AN ENHANCEMENT TO THEWIDE-FIELD INFRARED SURVEY EXPLORERFOR SOLAR SYSTEM SCIENCE

Abstract: The Wide-field Infrared Survey Explorer has surveyed the entire sky at four infrared wavelengths with greatly improved sensitivity and spatial resolution compared to its predecessors, the Infrared Astronomical Satellite and the Cosmic

Cited by 735 publications

References 68 publications

Comet 322p/Soho 1: An Asteroid With the Smallest Perihelion Distance?*

Comet 322p/Soho 1: An Asteroid With the Smallest Perihelion Distance?*

The Catalina Surveys Southern periodic variable star catalogue

THE 31 DEG2 RELEASE OF THE STRIPE 82 X-RAY SURVEY: THE POINT SOURCE CATALOG

Contact Info

Product

Resources

About

THE 31 DEG² RELEASE OF THE STRIPE 82 X-RAY SURVEY: THE POINT SOURCE CATALOG