P
P. L. Nolan
Researcher at University of California, San Diego
Publications - 11
Citations - 543
P. L. Nolan is an academic researcher from University of California, San Diego. The author has contributed to research in topics: Spectral line & Gamma-ray astronomy. The author has an hindex of 8, co-authored 11 publications receiving 534 citations.
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Journal ArticleDOI
The HEAO 1 A-4 catalog of high-energy X-ray sources
Alan M. Levine,F. Lang,Walter H. G. Lewin,F. A. Primini,C. A. Dobson,John P. Doty,Jeffrey A. Hoffman,S. K. Howe,A. Scheepmaker,W. A. Wheaton,James L. Matteson,W. A. Baity,Duane Gruber,F. K. Knight,P. L. Nolan,R. M. Pelling,Richard E. Rothschild,Laurence E. Peterson +17 more
TL;DR: In this article, the results of an all-sky survey carried out at high X-ray energies (13-180 keV) from August 1977 until January 1979 using data obtained with the UCSD/MIT Hard X-Ray and Low-Energy Gamma-Ray Instrument on the HEAO 1 satellite are reported.
Journal ArticleDOI
An absorption feature in the spectrum of the pulsed hard X-ray flux from 4U0115 + 63
Wm. A. Wheaton,John P. Doty,F. A. Primini,B. A. Cooke,C. A. Dobson,Alan S. Goldman,Michael H. Hecht,Jeffrey A. Hoffman,S. K. Howe,A. Scheepmaker,E. Y. Tsiang,Walter H. G. Lewin,James L. Matteson,Duane Gruber,W. A. Baity,Richard E. Rothschild,F. K. Knight,P. L. Nolan,Laurence E. Peterson +18 more
TL;DR: In this paper, a spectral feature, apparently an absorption line, has been observed at an energy of 20.1 + or - 0.5 keV in the pulsed flux of the 3.61-s X-ray pulsar 4U 0115+63 by using the UCSD/MIT instrument on HEAO 1.
Journal ArticleDOI
Centaurus A (NGC 5128) at 2 keV-2.3 MeV : HEAO 1 observations and implications.
W. A. Baity,R. E. Rothschild,Richard E. Lingenfelter,W.A. Stein,P. L. Nolan,Duane Gruber,F. K. Knight,James L. Matteson,Laurence E. Peterson,F. A. Primini,A. M. Levine,Walter H. G. Lewin,R. F. Mushotzky,A. F. Tennant +13 more
TL;DR: The active-nucleus galaxy Centaurus A has been studied at 2 keV-2.3 MeV using data from the UCSD/MIT hard X-ray and low-energy gamma-ray instrument and the GSFC/CIT cosmic Xray experiment on HEAO-1 as mentioned in this paper.
Journal ArticleDOI
HEAO 1 observations of gamma-ray lines from a solar flare
TL;DR: The 2.223 MeV line of deuterium and the 4.43 MeV lines of C-12 from a white-light solar flare of 1978 July 11 were observed in this article.
Journal ArticleDOI
Hercules X-1 hard X-ray pulsations observed from HEAO 1
D. E. Gruber,James L. Matteson,P. L. Nolan,F. K. Knight,W. A. Baity,R. E. Rothschild,Laurence E. Peterson,Jeffrey A. Hoffman,A. Scheepmaker,W. A. Wheaton,F. A. Primini,A. M. Levine,Walter H. G. Lewin +12 more
TL;DR: The 1.24-sec pulsations of Her X-1 in the energy range 13-75 keV have been analyzed in data obtained from the UCSD/MIT experiment on HEAO 1 during observations of the source on three dates in February 1978 and three in August 1978.