ACTIVE GALACTIC NUCLEI

        in  Seyfert Galaxies, Radio Galaxies, Quasars, Blazars etc.

Papers in Refereed Journals

• Soft X-ray properties of a high redshift sample of QSOs observed with ROSAT
• A 10-day ASCA observation of the narrow-line Seyfert 1 galaxy IRAS 13224-3809

• Optical and X-ray characteristics of a newly discovered narrow-line quasi-stellar object: RX J1334.2+3759.

• Surprises from a deep ASCA  Spectrum of the broad absorption line quasar PHL 5200

2000

• Active nucleus in a post-starburst galaxy: KUG 1259+280
• A new narrow-line Seyfert 1 galaxy: RX J1236.9+2656
• An ultra-soft X-ray source (RX~215319-1514) and discovery of a narrow line Seyfert 1 galaxy

• High resolution X-ray imaging observations of two low-luminosity Seyfert galaxies -- MNRAS,  309, 991

• X-Ray Spectrum of the High-Polarization Quasar PKS 1510-089

•  Strong X-Ray Absorption in a Broad Absorption Line Quasar: PHL 5200

•  Radio structure of the Seyfert galaxy Markarian 509
•  EXOSAT measurement of the spectrum of Markarian 382
•  X-ray variability in the Seyfert galaxy Markarian 618
•  X-ray continuum and line emission of the Seyfert galaxy MCG - 5-23-16

• X-ray observations of the bright Seyfert galaxy IC 4329A
• Observations of X-ray spectra of two nearby QSO's - Mrk 205 and Mrk 1148
• X-ray luminosity and spectral variability in the Seyfert type I galaxy - PG 2130 + 099
• Exosat observations of the quasar PKS 2135 - 147

• Exosat observations of the blazar PKS 1510 - 089
• Ginga observations of X-rays from the Seyfert I galaxy Markarian 509
• X-ray Observations of the radio Galaxy PICTOR-A

1987

• X-ray intensity and spectral variations in the BL Lac sources H2155-304 and PKS0548-322
• EXOSAT observations of a broad absorption-line quasar - PHL 5200

• X-ray and radio core emission in radio quasars

• Observation of soft X-ray spectra from a Seyfert 1 and a narrow emission-line galaxy
• Erratum:
• Soft X-ray observations of two BL Lacertae objects - Markarian 421 and 501