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|CfA3: 185 Type Ia Supernova Light Curves from the CfA|
We present multiband photometry of 185 type-Ia supernovae (SNe Ia), withover 11,500 observations. These were acquired between 2001 and 2008 atthe F. L. Whipple Observatory of the Harvard-Smithsonian Center forAstrophysics (CfA). This sample contains the largest number ofhomogeneously observed and reduced nearby SNe Ia (z lsim 0.08) publishedto date. It more than doubles the nearby sample, bringing SN Iacosmology to the point where systematic uncertainties dominate. Ournatural system photometry has a precision of lsim0.02 mag in BVRIr'i'and lsim0.04 mag in U for points brighter than 17.5 mag. We alsoestimate a systematic uncertainty of 0.03 mag in our SN Ia standardsystem BVRIr'i' photometry and 0.07 mag for U. Comparisons of ourstandard system photometry with published SN Ia light curves andcomparison stars, where available for the same SN, reveal agreement atthe level of a few hundredths mag in most cases. We find that1991bg-like SNe Ia are sufficiently distinct from other SNe Ia in theircolor and light-curve-shape/luminosity relation that they should betreated separately in light-curve/distance fitter training samples. TheCfA3 sample will contribute to the development of betterlight-curve/distance fitters, particularly in the few dozen cases wherenear-infrared photometry has been obtained and, together, can helpdisentangle host-galaxy reddening from intrinsic supernova color,reducing the systematic uncertainty in SN Ia distances due to dust.
|Kinematics of the Local Universe. XIII. 21-cm line measurements of 452 galaxies with the Nançay radiotelescope, JHK Tully-Fisher relation, and preliminary maps of the peculiar velocity field|
Aims.This paper presents 452 new 21-cm neutral hydrogen linemeasurements carried out with the FORT receiver of the meridian transitNançay radiotelescope (NRT) in the period April 2003-March 2005. Methods: This observational programme is part of a larger projectaiming at an exhaustive and magnitude-complete HI extragalacticcatalogue for Tully-Fisher applications (the so-called KLUN project, forKinematics of the Local Universe studies, to end in 2008). The wholeon-line HI archive of the NRT today contains reduced HI-profiles for4500 spiral galaxies of declination δ > -40°(http://klun.obs-nancay.fr). Results: As an example of thisapplication, we used the direct Tully-Fisher relation in three (JHK)bands in deriving distances to a large catalogue of 3126 spiral galaxiesdistributed through the whole sky and sampling the radial velocity rangewell between 0 and 8000 km s-1. Thanks to an iterative methodaccounting for selection bias and smoothing effects, we show a detailedand original map of the velocity field in the Local Universe as apreliminary output.Data Tables [see full text], [see full text], and [see full text]and HI-profiles (Fig. [see full text]) are only available inelectronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr(126.96.36.199) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/465/71
|Supernovae 2006fo and 2006le-2006lu|
IAUC 8770 available at Central Bureau for Astronomical Telegrams.
|A Digital Archive of H I 21 Centimeter Line Spectra of Optically Targeted Galaxies|
We present a homogeneous compilation of H I spectral parametersextracted from global 21 cm line spectra for some 9000 galaxies in thelocal universe (heliocentric velocity-200
|Arcsecond Positions of UGC Galaxies|
We present accurate B1950 and J2000 positions for all confirmed galaxiesin the Uppsala General Catalog (UGC). The positions were measuredvisually from Digitized Sky Survey images with rms uncertaintiesσ<=[(1.2")2+(θ/100)2]1/2,where θ is the major-axis diameter. We compared each galaxymeasured with the original UGC description to ensure high reliability.The full position list is available in the electronic version only.
|Galaxy coordinates. II. Accurate equatorial coordinates for 17298 galaxies|
Using images of the Digitized Sky Survey we measured coodinates for17298 galaxies having poorly defined coordinates. As a control, wemeasured with the same method 1522 galaxies having accurate coordinates.The comparison with our own measurements shows that the accuracy of themethod is about 6 arcsec on each axis (RA and DEC).
|Search and Redshift Survey for IRAS Galaxies behind the Milky Way and Structure of the Local Void|
This is the third and final paper of our systematic visual search forIRAS galaxies behind the Milky Way at |b| <= 15 deg. This paperpresents a catalog of 950 IRAS galaxies with 60 mu m flux densitieslarger than 0.6 Jy located between l = 0 deg and 150 deg, of which 293are newly identified by this search. We made a redshift survey for theidentified galaxies and obtained new redshift data of 171 galaxies. Wealso present newly measured redshifts of 27 IRAS galaxies between l =150 deg and 225 deg at |b| <= 15 deg. In this paper we studied thestructure of the Local void using IRAS galaxies and galaxies from theThird Reference Catalogue of Bright Galaxies in the region l = 30deg--120 deg and b = -50 deg to +30 deg. The center of the Local voidturned out to be located at l ~ 60 deg, b ~ -15 deg, and cz ~ 2500 kms-1, and the size is about 2500 km s-1 along the direction toward thecenter.
|A 21 CM survey of the Pisces-Perseus supercluster. III - The region north of +38 degrees|
As part of a comprehensive survey of galaxies in the region of thePisces-Perseus supercluster and its surroundings, 21-cm lineobservations obtained with the NRAO 91-m telescope are presented for 383galaxies in the right ascension range from 22 to 10 hr and north of +38deg declination. Recent improvements to the Green Bank receiver/feedsystem have dramatically raised detection rates at the distance ofPisces-Perseus (cz = +5000 km/s). The present study has contributed todouble the number of known redshifts outside rich clusters in thissection of the sky. The H I content of the current sample, as expressedin terms of the H I mass expected for a galaxy of the same optical sizeand morphology, matches the standard of normalcy established forisolated galaxies.
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