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An Atlas For Interpreting Gamma-Ray Pulsar Light Curves
Kyle P. Watters, Roger W. Romani, Patrick Weltevrede +1
We have simulated a population of young spin-powered pulsars and computed the beaming pattern and lightcurves for the three main geometrical models: polar cap emission, two-pole ca…
Suzaku Observations of Extreme MeV Blazar SWIFT J0746.3+2548
Shin Watanabe, Rie Sato, Tadayuki Takahashi +8
We report the Suzaku observations of the high luminosity blazar SWIFT J0746.3+2548 (J0746) conducted in November 2005. This object, with z = 2.979, is the highest redshift source o…
Pulsar Timing for the Fermi Gamma-ray Space Telescope
D. A. Smith, L. Guillemot, F. Camilo +25
We describe a comprehensive pulsar monitoring campaign for the Large Area Telescope (LAT) on the {\em Fermi Gamma-ray Space Telescope} (formerly GLAST). The detection and study of…
Rings and Jets around PSR J2021+3651: the `Dragonfly Nebula'
Adam Van Etten, Roger W. Romani, C. -Y. Ng
We describe recent Chandra ACIS observations of the Vela-like pulsar PSR J2021+3651 and its pulsar wind nebula (PWN). This `Dragonfly Nebula' displays an axisymmetric morphology, w…
First-Year Spectroscopy for the SDSS-II Supernova Survey
Chen Zheng, Roger W. Romani, Masao Sako +77
This paper presents spectroscopy of supernovae discovered in the first season of the Sloan Digital Sky Survey-II Supernova Survey. This program searches for and measures multi-band…
A Measurement of the Rate of type-Ia Supernovae at Redshift 0.1 from the First Season of the SDSS-II Supernova Survey
Benjamin Dilday, R. Kessler, J. A. Frieman +50
We present a measurement of the rate of type Ia supernovae (SNe Ia) from the first of three seasons of data from the SDSS-II Supernova Survey. For this measurement, we include 17 S…
Fitting Pulsar Wind Tori. II. Error Analysis and Applications
C. -Y. Ng, Roger W. Romani
We have applied the torus fitting procedure described in Ng & Romani (2004) to PWNe observations in the Chandra data archive. This study provides quantitative measurement of the PW…
CGRaBS: An All-Sky Survey of Gamma-Ray Blazar Candidates
Stephen E. Healey, Roger W. Romani, Garret Cotter +7
We describe a uniform all-sky survey of bright blazars, selected primarily by their flat radio spectra, that is designed to provide a large catalog of likely gamma-ray AGN. The def…
Characteristics of EGRET Blazars in the VLBA Imaging and Polarimetry Survey (VIPS)
G. B. Taylor, S. E. Healey, J. F. Helmboldt +12
We examine the radio properties of EGRET-detected blazars observed as part of the VLBA Imaging and Polarimetry Survey (VIPS). VIPS has a flux limit roughly an order of magnitude be…
The Sloan Digital Sky Survey-II Supernova Survey: Search Algorithm and Follow-up Observations
Masao Sako, B. Bassett, A. Becker +47
The Sloan Digital Sky Survey-II Supernova Survey has identified a large number of new transient sources in a 300 sq. deg. region along the celestial equator during its first two se…
A Study of the Type Ia/IIn Supernova 2005gj from X-ray to the Infrared: Paper I
J. L. Prieto, P. M. Garnavich, M. M. Phillips +53
We present extensive ugrizYHJK photometry and optical spectroscopy of SN 2005gj obtained by the SDSS-II and CSP Supernova Projects, which give excellent coverage during the first 1…
CRATES: An All-Sky Survey of Flat-Spectrum Radio Sources
Stephen E. Healey, Roger W. Romani, Gregory B. Taylor +5
We have assembled an 8.4 GHz survey of bright, flat-spectrum (alpha > -0.5) radio sources with nearly uniform extragalactic (|b|>10 deg) coverage for sources brighter than S_{4.8 G…
Birth Kick Distributions and the Spin-Kick Correlation of Young Pulsars
C. -Y. Ng, Roger W. Romani
Evidence from pulsar wind nebula symmetry axes and radio polarization observations suggests that pulsar motions correlate with the spin directions. We assemble this evidence for yo…
The VLBA Imaging and Polarimetry Survey at 5 GHz
J. F. Helmboldt, G. B. Taylor, S. Tremblay +13
We present the first results of the VLBA Imaging and Polarimetry Survey (VIPS), a 5 GHz VLBI survey of 1,127 sources with flat radio spectra. Through automated data reduction and i…
The Origin and Motion of PSR J0538+2817 in S147
C. -Y. Ng, Roger W. Romani, Walter F. Brisken +2
We report on VLBA astrometry and CXO imaging of PSR J0538+2817 in the supernova remnant S147. We measure a parallax distance of kpc along with a high-precisio…
The Spectral Energy Distribution of the High-Z Blazar Q0906+693
Roger W. Romani
We describe further observations of QSO J0906+6930, a z=5.48 blazar likely to be detected in gamma-rays. New radio and X-ray data place significant constraints on any kpc-scale ext…
Proper Motion of the Crab Pulsar Revisited
C. -Y. Ng, Roger W. Romani
It has been suggested that the Crab pulsar's proper motion is well aligned with the symmetry axis of the pulsar wind nebula. We have re-visited this question, examining over 6 year…
Near-Infrared, Kilosecond Variability of the Wisps and Jet in the Crab Pulsar Wind Nebula
A. Melatos, D. Scheltus, M. T. Whiting +6
We present a time-lapse sequence of 20 near-infrared (J- and K'-band) snapshots of the central 20x20 arcsec of the Crab pulsar wind nebula, taken at subarcsecond resolution with th…
The Complex Wind Torus and Jets of PSR B1706-44
Roger W. Romani, C. -Y. Ng, Richard Dodson +1
We report on Chandra ACIS imaging of the pulsar wind nebula (PWN) of the young Vela-like PSR B1706-44, which shows the now common pattern of an equatorial wind and polar jets. The…
The Fall 2004 SDSS Supernova Survey
Masao Sako, Roger Romani, Josh Frieman +38
In preparation for the Supernova Survey of the Sloan Digital Sky Survey (SDSS) II, a proposed 3-year extension to the SDSS, we have conducted an early engineering and science run d…
Two Pulsar Wind Nebulae: Chandra/XMM-Newton Imaging of GeV J1417-6100
C. -Y. Ng, Mallory S. E. Roberts, Roger W. Romani
We report on Chandra ACIS and XMM-Newton MOS/PN imaging observations of two pulsar wind nebulae (K3/PSR J1420-6048 and G313.3+0.1=`the rabbit') associated with the Galactic unident…
A Search for Radio Emission from the Young 16-ms X-ray Pulsar PSR J0537-6910
F. Crawford, M. McLaughlin, S. Johnston +2
PSR J0537-6910 is a young, energetic, rotation-powered X-ray pulsar with a spin period of 16 ms located in the Large Magellanic Cloud. We have searched for previously undetected ra…
The Vela Pulsar in the Ultraviolet
Roger W. Romani, Oleg Kargaltsev, George G. Pavlov
We describe time-tagged observations of the Vela pulsar (PSR B0833-45) with the HST STIS MAMA-UV detectors. Using an optimal extraction technique, we obtain a NUV light curve and c…
A Northern Survey of Gamma-Ray Blazar Candidates
David Sowards-Emmerd, Roger W. Romani, Peter F. Michelson +2
In preparation for GLAST, we have compiled a sample of blazar candidates to increase the pool of well studied AGN from which GLAST counterparts will be drawn. Sources were selected…