SIMBAD references

1999A&A...345..414W - Astronomy and Astrophysics, volume 345, 414-418 (1999/5-2)

Simultaneous multifrequency observations of the BL Lac MS 0205.7+3509.

WATSON D., HANLON L., McBREEN B., SMITH N., TASHIRO M., FOLEY A.R., METCALFE L., BECKMANN V., SANCHEZ S.F. and TERAESRANTA H.

Abstract (from CDS):

Radio and optical observations of the possible microlensed BL Lac source MS 0205.7+3509 were obtained simultaneously with ASCA x-ray measurements in February 1997. A single power law model, with a photon index of 2.61, is an adequate fit to the ASCA data, once hydrogenic absorption in excess of the Galactic value is permitted, confirming a previous ROSAT measurement. On the basis of our simultaneous data we have determined MS 0205.7+3509 to be a typical x-ray selected BL Lac, with αxox=-0.82. There is no indication of an inverse Compton (IC) component in the ASCA spectrum up to 10keV. No evidence for variability on hour-long timescales is present in either the x-ray or the optical data. We discuss these results in the context of a gravitational microlensing scenario for MS 0205.7+3509.

Abstract Copyright:

Journal keyword(s): X-rays: galaxies - cosmology: gravitational lensing - galaxies: BL Lacertae objects: individual: MS 0205.7+3509

Nomenclature: Table 3: [WHM99] HHMMSS.ss-DDMMSS.ss N=3.

Simbad objects: 9

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2019.09.17-03:07:28

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