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Optical Identification of X-ray Sources in a High X-ray Flux Sensitivity Area from the RASS

  • Raúl Mújica (a1), Franz-Josef Zickgraf (a2), V. Chavushyan (a3), Y. Juárez (a3), A. Serrano (a3), I. Appenzeller (a4) and J. Krautter (a4)...

Abstract

We have optically identified a complete sub-sample of ROSAT All-Sky Survey (RASS) X-ray sources contained in 6 study areas. Of the original 12° × 12° area near the NEP, only one-quarter was observed until now in order to keep the number of sources to a manageable size. This area is of particular interest because the RASS integration time is about a factor of ten longer than in the other areas and therefore a factor of 3-4 deeper in flux. We have started to observe the RASS sources in the remaining 3/4 of this area. First results are presented.

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References

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Appenzeller, et al. 1998, ApJS, 117, 319, Paper III
Condon, et al. 1998, AJ, 115, 1693
Krautter, et al. 1999, A&A, 350, 743, Paper IV
Stocke, et al. 1991, ApJ, 348, 141
Zickgraf, et al. 1997, A&AS, 123, 103, Paper II

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