Alberto C. Sadun
Agnes Scott College
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Alberto C. Sadun.
web science | 1996
R. Edelson; T. Alexander; D. M. Crenshaw; Shai Kaspi; M. Malkan; Bradley M. Peterson; R. S. Warwick; J. Clavel; A. V. Filippenko; K. Horne; Kirk T. Korista; Gerard A. Kriss; Julian H. Krolik; D. Maoz; K. Nandra; Paul T. O'Brien; Steven V. Penton; T Yaqoob; P. Albrecht; Danielle Alloin; Thomas R. Ayres; Tj Balonek; P. Barr; Aaron J. Barth; R. Bertram; Ge Bromage; Michael T. Carini; Te Carone; Fz Cheng; K. K. Chuvaev
This paper combines data from the three preceding papers in order to analyze the multi-waveband variability and spectral energy distribution of the Seyfert~1 galaxy NGC~4151 during the December 1993 monitoring campaign. The source, which was near its peak historical brightness, showed strong, correlated variability at X-ray, ultraviolet, and optical wavelengths. The strongest variations were seen in medium energy (
The Astrophysical Journal | 1994
G. A. Reichert; P. M. Rodriquez-Pascual; D. Alloin; J. Clavel; D. M. Crenshaw; Gerard A. Kriss; Julian H. Krolik; M. Malkan; Hagai Netzer; Bradley M. Peterson; Willem Wamsteker; A. Altamore; B. Altieri; Ksj Anderson; J. H. Blackwell; C. Boisson; Noah Brosch; T. E. Carone; M. Dietrich; M. N. England; I. N. Evans; A. V. Filippenko; C. M. Gaskell; M. R. Goad; P. M. Gondhalekar; K. Horne; D. Kazanas; W. Kollatschny; Anuradha Purushottam Koratkar; Kirk T. Korista
sim
The Astrophysical Journal | 1994
J. R. Webb; Chris R. Shrader; T. J. Balonek; D. M. Crenshaw; D. Kazanas; Sandra Denise Clements; A. G. Smith; A. D. Nair; R. J. Leacock; P. P. Gombola; Alberto C. Sadun; H. R. Miller; I. Robson; Ryuichi Fujimoto; F. Makino; Tsuneo Kii; H. D. Aller; Margo F. Aller; Philip A. Hughes; Esko Valtaoja; H. Teräsranta; E. Salonen; M. Tornikoski; W. Chism
1.5~keV) X-rays, with a normalized variability amplitude (NVA) of 24%. Weaker (NVA = 6%) variations (uncorrelated with those at lower energies) were seen at soft
The Astrophysical Journal | 1995
A. Treves; H. H. Fink; M. Malkan; S. J. Wagner; Belinda J. Wilkes; F. Baganoff; J. Heidt; E. Pian; Alberto C. Sadun; S. Schaeidt; J. T. Bonnell; W. Brinkmann; D. de Martino; L. Maraschi; E. G. Tanzi; M. H. Ulrich; Willem Wamsteker
gamma
Advances in Space Research | 1995
P. Grandi; L. Maraschi; Claudia M. Urry; Ann E. Wehrle; Margo F. Aller; Hugh D. Aller; T. J. Balonek; J Jason; I. M. McHardy; R. C. Hartman; E. Pian; J.A Stevens; Alberto C. Sadun; H. Teräsranta; A. Treves
-ray energies of
web science | 1996
D. M. Crenshaw; Pm RodriguezPascual; Steven V. Penton; R. Edelson; Danielle Alloin; Thomas R. Ayres; J. Clavel; K. Horne; Wn Johnson; Shai Kaspi; Kirk T. Korista; Gerard A. Kriss; Julian H. Krolik; M. Malkan; D. Maoz; Hagai Netzer; Paul T. O'Brien; Bradley M. Peterson; Ga Reichert; J. M. Shull; Mh Ulrich; Willem Wamsteker; R. S. Warwick; T Yaqoob; Tj Balonek; P. Barr; Ge Bromage; Michael T. Carini; Te Carone; Fz Cheng
sim
Symposium - International Astronomical Union | 1996
L. Takalo; A. Sillanpää; T. Pursimo; Harry J. Lehto; K. Nilsson; Pekka Teerikorpi; P. Heinamaki; M. Kidger; J. A. de Diego; Tim Mahoney; J. M. Rodríguez-Espinosa; Jose Nicolas Gonzalez-Perez; Paul Boltwood; D. Dultzin-Hacyan; E. Benítez; George W. Turner; J. W. Robertson; R. K. Honeycut; Yu. S. Efimov; N. M. Shakhovskoy; Philip A. Charles; D. Kühl; K. J. Schramm; Ulf Borgeest; Joachim von Linde; W. Weneit; T. Schramm; Alberto C. Sadun; Randy Grashuis; J. Heidt
100~keV. No significant variability was seen in softer (0.1--1~keV) X-ray bands. In the ultraviolet/optical regime, the NVA decreased from 9% to 1% as the wavelength increased from 1275~AA to 6900~AA. These data do not probe extreme ultraviolet (1200~AA to 0.1~keV) or hard X-ray (2--50~keV) variability. The phase differences between variations in different bands were consistent with zero lag, with upper limits of
The Astrophysical Journal | 1996
P. Grandi; Claudia M. Urry; L. Maraschi; Ann E. Wehrle; Greg M. Madejski; Margo F. Aller; H. D. Aller; Charles D. Bailyn; T. J. Balonek; T. H. Bock; I. S. Glass; S.J. Litchfield; I. M. McHardy; John S. Mulchaey; H.-P. Reuter; E.I. Robson; Alberto C. Sadun; W. Sherry; H. Steppe; J. A. Stevens; H. Teraesranta; M. Tornikoski; S. J. Wagner
ls
The Astronomical Journal | 1990
J. R. Webb; Michael T. Carini; Sandra Denise Clements; S. Fajardo; P. P. Gombola; R. J. Leacock; Alberto C. Sadun; A. G. Smith
0.15~day between 1275~AA and the other ultraviolet bands,
Astronomy & Astrophysics Supplement Series | 1996
L. Takalo; A. Sillanpää; Tapio Pursimo; Harry J. Lehto; Kim K. Nilsson; P. Teerikorpi; P. Heinämäki; Markku Lainela; M. Kidger; J. A. de Diego; Jose Nicolas Gonzalez-Perez; J. M. Rodríguez-Espinosa; Tim Mahoney; Paul Boltwood; Deborah Dultzin-Hacyan; E. Benítez; George W. Turner; J. W. Robertson; R. K. Honeycut; Yu. S. Efimov; N. H. Shakhovskoy; Philip A. Charles; K. J. Schramm; Ulf Borgeest; Joachim von Linde; W. Weneit; D. Kühl; T. Schramm; Alberto C. Sadun; Randy Grashuis
ls
