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Articles: 2'113'726
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16 September 2021
 
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Results 1 to 20 of 45 for query "David J. Helfand". (0.00 sec.)

[    1    2    3    ]   Next
1.
FIRST-2MASS Sources Below the APM Detection Threshold: A Population of Highly Reddened Quasars
Eilat Glikman; Michael D. Gregg; Mark Lacy; David J. Helfand; Robert H. Becker; Richard L. White;
16 Feb 2004   /  Astrophys.J. 607 (2004) 60-75
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2.
The FIRST Radio-Loud Broad Absorption Line QSO and Evidence for a Hidden Population of Quasars
Robert H. Becker; Michael D. Gregg; Isobel M. Hook; Richard G. McMahon; Richard L. White; David J. Helfand;
31 Dec 1996
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3.
Weak Lensing by Large-Scale Structure with the FIRST Radio Survey
Tzu-Ching Chang; Alexandre Refregier; David J. Helfand;
30 Aug 2004   /  Astrophys.J. 617 (2004) 794-810
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4.
A New Catalog of Radio Compact HII Regions in the Milky Way
Uriel Giveon; Robert H. Becker; David J. Helfand; Richard L. White;
3 Oct 2004
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5.
The Serendipitous Extragalactic X-Ray Source Identification (SEXSI) Program: II. Optical Imaging
Megan E. Eckart; Elise S. Laird; Daniel Stern; Peter H. Mao; David J. Helfand; Fiona A. Harrison;
1 Sep 2004
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6.
The 3-53 keV Spectrum of the Quasar 1508+5714: X-rays from z = 4.3
Edward C. Moran; David J. Helfand;
19 May 1997
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7.
The FIRST Bright QSO Survey
Michael D. Gregg; Robert H. Becker; Richard L. White; David J. Helfand; Richard G. McMahon; Isobel M. Hook;
25 Apr 1996
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8.
The FIRST-2MASS Red Quasar Survey
Eilat Glikman; David J. Helfand; Richard L. White; Robert H. Becker; Michael D. Gregg; Mark Lacy;
21 Jun 2007
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9.
A Near-Infrared Spectral Template for Quasars
Eilat Glikman; David J. Helfand; Richard L. White;
22 Nov 2005
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10.
A Galaxy at z = 6.545 and Constraints on the Epoch of Reionization
Daniel Stern; Sarah A. Yost; Megan E. Eckart; Fiona A. Harrison; David J. Helfand; S.G. Djorgovski; Sangeeta Malhotra; James E. Rhoads;
19 Jul 2004   /  Astrophys.J. 619 (2005) 12-18
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11.
New Constraints on the Structure and Evolution of the Pulsar Wind Nebula 3C 58
Patrick Slane; David J. Helfand; Eric van der Swaluw; Stephen S. Murray;
19 May 2004   /  Astrophys.J. 616 (2004) 403-413
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12.
The Serendipitous Extragalactic X-Ray Source Identification (SEXSI) Program: I. Characteristics of the Hard X-Ray Sample
Fiona A. Harrison; Megan E. Eckart; Peter H. Mao; David J. Helfand; Daniel Stern;
29 Jun 2003   /  Astrophys.J. 596 (2003) 944-956
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13.
An X-ray Image of the Composite SNR G16.7+0.1
David J. Helfand; Marcel A. Agueros; E. V. Gotthelf;
16 Apr 2003   /  Astrophys.J. 592 (2003) 941-946
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14.
An I-Band-Selected Sample of Radio-Emitting Quasars: Evidence for a Large Population of Red Quasars
Richard L. White; David J. Helfand; Robert H. Becker; Michael D. Gregg; Marc Postman; Tod R. Lauer; William Oegerle;
1 Apr 2003   /  Astron.J. 126 (2003) 706
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15.
Chandra X-ray Imaging Spectroscopy of the Young Supernova Remnant Kesteven 75
David J. Helfand; Benjamin F. Collins; E. V. Gotthelf;
18 Sep 2002   /  Astrophys.J. 582 (2003) 783-792
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16.
Optical Counterparts for 70,000 Radio Sources: APM Identifications for the FIRST Radio Survey
Richard G. McMahon; Richard L. White; David J. Helfand; Robert H. Becker;
18 Oct 2001   /  Astrophys.J.Suppl. 143 (2002) 1-24
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17.
The FIRST Bright Quasar Survey III. The South Galactic Cap
Robert H. Becker; Richard L. White; Michael D. Gregg; Sally A. Laurent-Muehleisen; Michael S. Brotherton; Chris D. Impey; Frederic H. Chaffee; Gordon T. Richards; David J. Helfand; Mark Lacy; Frederic Courbin; Deanne D. Proctor;
17 Apr 2001   /  Astrophys.J.Suppl. 135 (2001) 227-262
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18.
The Nuclear Spectroscopic Telescope Array (NuSTAR) Mission
Fiona A. Harrison; William W. Craig; Finn E. Christensen; Charles J. Hailey; Will W. Zhang; Steven E. Boggs; Daniel Stern; W. Rick Cook; Karl Forster; Paolo Giommi; Brian W. Grefenstette; Yunjin Kim; Takao Kitaguchi; Jason E Koglin; Kristin K. Madsen; Peter H. Mao; Hiromasa Miyasaka; Kaya Mori; Matteo Perri; Michael J. Pivovaroff; Simonetta Puccetti; Vikram R. Rana; Niels J. Westergaard; Jason Willis; Andreas Zoglauer; Hongjun An; Matteo Bachetti; Nicolas M. Barriere; Eric C. Bellm; Varun Bhalerao; Nicolai F. Brejnholt; Felix Fuerst; Carl C. Liebe; Craig B. Markwardt; Melania Nynka; Julia K. Vogel; Dominic J. Walton; Daniel R. Wik; David M. Alexander; Lynn R. Cominsky; Ann E. Hornschemeier; Allan Hornstrup; Victoria M. Kaspi; Greg M. Madejski; Giorgio Matt; Silvano Molendi; David M. Smith; John A. Tomsick; Marco Ajello; David R. Ballantyne; Mislav Balokovic; Diddier Barret; Franz E. Bauer; Roger D. Blandford; W. Niel Brandt; Laura W. Brenneman; James Chiang; Deepto Chakrabarty; Jerome Chenevez; Andrea Comastri; Martin Elvis; Andrew C. Fabian; Duncan Farrah; Chris L. Fryer; Eric V. Gotthelf; Jonathan E. Grindlay; David J. Helfand; Roman Krivonos; David L. Meier; Jon M. Miller; Lorenzo Natalucci; Patrick Ogle; Eran O. Ofek; Andrew Ptak; Stephen P. Reynolds; Jand R. Rigby; Gianpiero Tagliaferri; Stephen E. Thorsett; Ezequiel Treister; C. Megan Urry;
30 Jan 2013
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19.
Exploring the Optical Transient Sky with the Palomar Transient Factory
Arne Rau; Shrinivas R. Kulkarni; Nicholas M. Law; Joshua S. Bloom; David Ciardi; George S. Djorgovski; Derek B. Fox; Avishay Gal-Yam; Carl C. Grillmair; Mansi M. Kasliwal; Peter E. Nugent; Eran O. Ofek; Robert M. Quimby; William T. Reach; Michael Shara; Lars Bildsten; S. Bradley Cenko; Andrew J. Drake; Alexei V. Filippenko; David J. Helfand; George Helou; D. Andrew Howell; Dovi Poznanski; Mark Sullivan;
29 Jun 2009
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20.
The Chandra ACIS Survey of M33: X-ray, Optical and Radio Properties of the Supernova Remnants
Knox S. Long; William P. Blair; P. Frank Winkler; Robert H. Becker; Terrance J. Gaetz; Parviz Ghavamian; David J. Helfand; John P. Hughes; Robert P. Kirshner; Kip D. Kuntz; Emily K. McNeil; Thomas G. Pannuti; Paul P. Plucinsky; Destry Saul; Ralph Tuellmann; Benjamin Williams;
9 Feb 2010
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