Browsing FAS Scholarly Articles by Author "Aldcroft, Thomas"

Now showing items 1-5 of 5

    • Chandra Multiwavelength Project: Normal Galaxies at Intermediate Redshift 

      Kim, D.‐W.; Barkhouse, W. A.; Romero‐Colmenero, E.; Green, P. J.; Kim, M.; Mossman, Amy E.; Schlegel, E.; Silverman, J. D.; Aldcroft, Thomas L.; Anderson, C.; Ivezic, Z.; Kashyap, V.; Tananbaum, Harvey D.; Wilkes, Belinda Jane (IOP Publishing, 2006)
      We have investigated 136 Chandra extragalactic sources, including 93 galaxies with narrow emission lines (NELGs) and 43 with only absorption lines (ALGs). Based on fX/fO, LX, X-ray spectral hardness, and optical emission-line ...

    • The Chandra Multiwavelength Project: Optical Follow‐up of Serendipitous Chandra Sources 

      Green, P. J.; Silverman, J. D.; Cameron, R. A.; Kim, D.‐W.; Wilkes, Belinda Jane; Barkhouse, W. A.; LaCluyze, A.; Morris, D.; Mossman, Amy E.; Ghosh, H.; Grimes, J. P.; Jannuzi, B. T.; Tananbaum, Harvey D.; Aldcroft, Thomas L.; Baldwin, J. A.; Chaffee, F. H.; Dey, A.; Dosaj, A.; Evans, Nancy Remage; Fan, X.; Foltz, C.; Gaetz, Terrance J.; Hooper, E. J.; Kashyap, Vinay L.; Mathur, S.; McGarry, M. B.; Romero‐Colmenero, E.; Smith, M. G.; Smith, P. S.; Smith, R. C.; Torres, Guillermo; Vikhlinin, Alexey A.; Wik, D. R. (IOP Publishing, 2004)
      We present follow-up optical g', r', and i' imaging and spectroscopy of serendipitous X-ray sources detected in six archival Chandra images included in the Chandra Multiwavelength Project (ChaMP). Of the 486 X-ray sources ...

    • Discovery of a Jetlike Structure at the High-Redshift QSO CXOMP J084128.3+131107 

      Schwartz, D. A.; Silverman, J.; Birkinshaw, M.; Karovska Neily, Margarita; Aldcroft, Thomas L.; Barkhouse, W.; Green, P.; Kim, D.-W.; Wilkes, Belinda Jane; Worrall, Diana M. (IOP Publishing, 2004)
      The Chandra Multiwavelength Project has discovered a jetlike structure associated with a newly recognized QSO at redshift z = 1.866. The system was 9farcm4 off-axis during an observation of 3C 207. Although significantly ...

    • A Full Year's Chandra Exposure on Sloan Digital Sky Survey Quasars From the Chandra Multiwavelength Project 

      Green, Paul J.; Aldcroft, Thomas L.; Richards, G. T.; Barkhouse, W. A.; Constantin, Ana-Maria; Haggard, D.; Karovska Neily, Margarita; Kim, D.-W.; Kim, M.; Vikhlinin, Alexey A.; Anderson, S. F.; Mossman, Amy E.; Kashyap, Vinay L.; Myers, A. C.; Silverman, J. D.; Wilkes, Belinda Jane; Tananbaum, Harvey D. (IOP Publishing, 2008)
      We study the spectral energy distributions and evolution of a large sample of optically selected quasars from the Sloan Digital Sky Survey that were observed in 323 Chandra images analyzed by the Chandra Multiwavelength ...

    • The X‐Ray Warm Absorber in NGC 3516 

      Mathur, Smita; Wilkes, Belinda Jane; Aldcroft, Thomas L. (IOP Publishing, 1997)
      The Seyfert 1 galaxy, NGC 3516 has been the subject of many absorption line studies at both ultraviolet and X-ray wavelengths. In the UV, strong, broad, variable associated metal line absorption with velocity width ~2000 ...