NEXXUS 2 - The database for Nearby X-ray and extreme UV emitting Stars

Star Page     -     NS 2157-5100 A   GJ 841 A   HIP 108405   CD-51 13128   LTT 8767

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ROSAT Survey Field Image Browser     SIMBAD entry

Star Information:

RA (2000.0)	DE (2000.0)	μ [ "/yr ]	θ [ ° ]	Radial Velocity	Spectral Type	B	V	Distance [ pc ]
21 57 41.20	-51 00 22.24	0.375	184.7	-8.1	M2.5	11.87	10.36	16.12

ROSAT All-Sky Survey (RASS):

Detection Number	Count Rate	Background	Exposure Time	Likelihood	HR1	HR2	log Lx
1RXS J215740.9-510027	1.077 ± 0.08115	0.00134	375	471	-0.18 ± 0.07	-0.2 ± 0.11	28.66

ROSAT High Resolution Imager (HRI):

Detection Number	Sequence Id	Count Rate	SNR	OAX	Exposure Time	Observation Date	Images	log Lx
1RXH J215741.6-510017	201936 a01.001	0.3309 ± 0.00947	29.5	8	3719	1995-05-14 to 1995-05-17	rgb rgbd	29.39
1RXH J215741.0-510016	201936 n00.001	0.2217 ± 0.0172	11.5	8	783	1994-11-10 to 1994-11-10	rgb rgbd	29.22

ROSAT Wide Field Camera (WFC) All-Sky Survey:

Detection Number	RA (2000.0)	DE (2000.0)	S1 Count Rate	S2 Count Rate	Significance S1	Significance S2	Significance
2RE J2157-505	21 57 38.57	-50 59 45.6	0.03 ± 0.01	0.04 ± 0.01	8.5	9.7	12.6

Last modified on Tuesday, 28 October 2008.   C. Liefke | Impressum