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

Star Page     -     Gl 490A      G123-075   BF~CVn 1E1255.3+3529a

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ROSAT Survey Field Image Browser      Simbad Objects

Star Information:

RA (2000.0)	DE (2000.0)	Mu	Theta	Radial Velocity	Spectral Type	V	B-V	R-I	MV	Pi	Distance
12 57 40	+ 35 13.5	0.3172	236.2	-7.9	M0 V e	10.67	1.44	1.05	9.38	55.27 ± 3.15	18.09

ROSAT All-Sky Survey (RASS):

Detection Number	Count Rate	Background	Exposure Time	Likeli	HR1	HR2	log Lx
1RXS J125740.2+351334	0.8377 ± 0.04181	0.00152	521	1170	-0.22 ± 0.04	0.07 ± 0.07	29.29

ROSAT Position Sensitive Proportional Counter (PSPC):

Detection Number	Sequence Id	Count Rate	Background	Likeli	OAX	Exposure Time	Observation Time	HR1	HR2	Images	log Lx
2RXP J125740.4+351324	600164 n00.007	0.6415 ± 0	0.002128	4326	27	12854	911220 to 911224	-0.24 ± 0.01	-0.06 ± 0.02	rgb rgbd	29.18
2RXP J125740.5+351333	701178 n00.021	0.5897 ± 0.0125	0.001608	3478	9	3760	921231 to 921231	-0.13 ± 0.02	-0.13 ± 0.03	rgb rgbd	29.14

ROSAT High Resolution Imager (HRI):

Detection Number	Sequence Id	Count Rate	SNR	OAX	Exposure Time	Observation Date	Images	log Lx
1RXH J125740.2+351333	201929 a01.001	0.1437 ± 0.00933	12.7	1	1652	960619 to 960619	rgb rgbd	29.13

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 J1257+351	12 57 39.25	+35 13 16.8	0.018 ± 0.004	0.022 ± 0.005	6.1	5.5	8.2

ROSAT Wide Field Camera (WFC) Pointed Observations:

Source	RA (2000.0)	DE (2000.0)	Sequence ID	Count Rate	OAX	Significance	Filter	mjd
1	12 57 39.61	+ 35 13 57.3	600164 w00_s1a	0.0125 ± 0.00402	27.8	4.24	S1	48610.72
1	12 57 38.72	+ 35 13 44.3	600273 w01_s1a	0.02728 ± 0.00597	27.8	6.79	S1	48967

Last modified on Thursday, 23 October 2003.   C. Liefke | Impressum