| Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. I-an 8 month campaign of monitoring NGC 5548 with IUE J Clavel, GA Reichert, D Alloin, DM Crenshaw, G Kriss, JH Krolik, ... Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 366, Jan. 1, 1991, p …, 1991 | 659 | 1991 |
| Multiwavelength observations of short-timescale variability in NGC 4151. IV. Analysis of multiwavelength continuum variability RA Edelson, T Alexander, DM Crenshaw, S Kaspi, MA Malkan, ... The Astrophysical Journal, 1996 | 246 | 1996 |
| An algorithm for the relative scaling of spectra E van Groningen, I Wanders Publications of the Astronomical Society of the Pacific 104 (678), 700, 1992 | 166 | 1992 |
| The extended narrow line region of NGC 4151. I-Emission line ratios and their implications MV Penston, A Robinson, D Alloin, I Appenzeller, I Aretxaga, DJ Axon, ... Astronomy and Astrophysics (ISSN 0004-6361), vol. 236, no. 1, Sept. 1990, p …, 1990 | 152 | 1990 |
| Multiwavelength Observations of Short-Timescale Variability in NGC 4151. I. Ultraviolet Observations DM Crenshaw, PM Rodriguez-Pascual, SV Penton, RA Edelson, D Alloin, ... The Astrophysical Journal, 1996 | 104 | 1996 |
| Broad emission line variability in the Seyfert 1 galaxies NGC 5548 and NGC 3783 GM Stirpe, AG De Bruyn, E Van Groningen Astronomy and Astrophysics (ISSN 0004-6361), vol. 200, no. 1-2, July 1988, p …, 1988 | 72 | 1988 |
| Spectroscopic monitoring of active galactic nuclei. II-The Seyfert-1 galaxy NGC 3516 I Wanders, E Van Groningen, D Alloin, I Aretxaga, D Axon, AG de Bruyn, ... Astronomy and Astrophysics (ISSN 0004-6361), vol. 269, no. 1-2, p. 39-53 …, 1993 | 63 | 1993 |
| Spectrscopic monitoring of active galactic nuclei. 3: Size of the broad line region in NGC 3227 I Salamanca, D Alloin, T Baribaud, D Axon, G de Bruyn, M Goad, ... Astronomy and Astrophysics (ISSN 0004-6361), vol. 282, no. 3, p. 742-752 282 …, 1994 | 51 | 1994 |
| Accretion disks in Seyfert nuclei-Broad line profiles and asymmetries E Van Groningen Astronomy and Astrophysics (ISSN 0004-6361), vol. 126, no. 2, Oct. 1983, p …, 1983 | 41 | 1983 |
| Broad emission line profiles in Seyfert-1 galaxies-Forbidden line O III-wings from a transition zone E Van Groningen, AG de Bruyn Astronomy and Astrophysics (ISSN 0004-6361), vol. 211, no. 2, March 1989, p …, 1989 | 40 | 1989 |
| Further evidence for Raman scattering in RR Tel E van Groningen Monthly Notices of the Royal Astronomical Society 264 (4), 975-979, 1993 | 38 | 1993 |
| Monitoring of active galacitc nuclei. 4: The Seyfert 1 galaxy NGC 4593 M Dietrich, W Kollatschny, D Alloin, I Aretxaga, D Axon, AG de Bruyn, ... Astronomy and Astrophysics (ISSN 0004-6361), vol. 284, no. 1, p. 33-43 284 …, 1994 | 36 | 1994 |
| VBLUW photometry of the association SCO OB1 (containing the open cluster NGC 6231)-A discussion on the evolutionary status of the hypergiant Zeta (1) SCO (B1Ia+) AM Van Genderen, W Bijleveld, E Van Groningen Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 58, Dec …, 1984 | 36 | 1984 |
| One-sided jets in extragalactic radiosources E Van Groningen, GK Miley, CA Norman Astronomy and Astrophysics, vol. 90, no. 1-2, Oct. 1980, p. L7-L9. Research …, 1980 | 35 | 1980 |
| Host galaxies of intermediate redshift radio-loud and radio-quiet quasars J Rönnback, E van Groningen, I Wanders, E Örndahl Monthly Notices of the Royal Astronomical Society 283 (1), 282-296, 1996 | 32 | 1996 |
| Broad emission line profiles in Seyfert-1 galaxies. I-Evidence for a disk and a wind in MKN 335 E Van Groningen Astronomy and Astrophysics (ISSN 0004-6361), vol. 186, no. 1-2, Nov. 1987, p …, 1987 | 31 | 1987 |
| Monitoring of active galactic nuclei. I-The quasars 1302-102 and 1217+ 023 N Jackson, PT O'Brien, M Goad, D Alloin, DJ Axon, AG de Bruyn, J Clavel, ... Astronomy and Astrophysics (ISSN 0004-6361), vol. 262, no. 1, p. 17-25. 262 …, 1992 | 27 | 1992 |
| Seeing and aperture effects on forbidden O III-based flux calibration of AGN spectra-NGC 3516: A case study I Wanders, BM Peterson, RW Pogge, MM DeRobertis, E Van Groningen Astronomy and Astrophysics (ISSN 0004-6361), vol. 266, no. 1, p. 72-76. 266 …, 1992 | 23 | 1992 |
| Development in astronomy and space science in Africa M Pović, M Backes, P Baki, D Baratoux, SB Tessema, Z Benkhaldoun, ... Nature Astronomy 2 (7), 507-510, 2018 | 21 | 2018 |
| An Analysis of the Spectra of Three SEYFERT-1 Galaxies with Strong CAII Emission E van Groningen Astronomy and Astrophysics, Vol. 272, NO. 1/MAYI, P. 25, 1993 272, 25, 1993 | 20 | 1993 |
Ignaz WandersVectr.ConsultingVerified email at vectr.consulting
