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

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ROSAT Survey Field Image Browser     SIMBAD entry


Star Information:

RA (2000.0)DE (2000.0)μ [ "/yr ]θ [ ° ]Spectral TypeBVDistance [ pc ]
12 57 39.35 +35 13 19.140.317236.2M414.813.1619.2


ROSAT All-Sky Survey (RASS):

Detection NumberCount RateBackgroundExposure TimeLikelihoodHR1HR2log Lx
1RXS J125740.2+3513340.8377 ± 0.041810.001525211170-0.22 ± 0.040.07 ± 0.0729.35


ROSAT Position Sensitive Proportional Counter (PSPC):

Detection NumberSequence IdCount Rate BackgroundLikeliOAXExposure TimeObservation TimeHR1HR2Imageslog Lx
2RXP J125740.4+351324600164 n00.0070.6415 ± 00.00213432627128541991-12-20 to 1991-12-24-0.24 ± 0.01-0.06 ± 0.02rgb rgbd29.23
2RXP J125740.5+351333701178 n00.0210.5897 ± 0.01250.001613478937601992-12-31 to 1992-12-31-0.13 ± 0.02-0.13 ± 0.03rgb rgbd29.19


ROSAT High Resolution Imager (HRI):

Detection NumberSequence IdCount RateSNROAXExposure TimeObservation DateImageslog Lx
1RXH J125740.2+351333201929 a01.0010.1437 ± 0.0093312.7116521996-06-19 to 1996-06-19rgb rgbd29.18


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

Detection NumberRA (2000.0)DE (2000.0) S1 Count Rate S2 Count RateSignificance S1Significance S2Significance
2RE J1257+35112 57 39.25+35 13 16.80.02 ± 00.02 ± 0.016.15.58.2


ROSAT Wide Field Camera (WFC) Pointed Observations:

SourceRA (2000.0)DE (2000.0)Sequence IDCount RateOAXSignificanceFilterObservation Date
112 57 39.61+ 35 13 57.2600164 w00_s1a0.0125 ± 0.0040227.84.24S11991-12-20T18:00
112 57 38.72+ 35 13 44.3600273 w01_s1a0.02728 ± 0.0059727.86.79S11992-12-11T00:00


EUVE sources detected in other ways:

Detection NumberRA (2000.0)DE (2000.0)58-174 Å Count Rate156-234 Å Count Rate67-178 Å Count Rate157-364 Å Count Rate
EUVE J1257+35212 57 41+35 13.60.0350.06

Joint EUVE-ROSAT Detections:

Detection NumberRA (2000.0)DE (2000.0)58-174 Å Count Rate
EUVE J1257+35212 57 40+35 13 340.03

Einstein Imaging Proportional Counter (IPC):

Detection NumberRA (2000.0)DE (2000.0)Sequence IDCount RateExposure TimeSNROAXObservation DateImagesData
2E 1255.3+353012 57 41.6+35 13 25445 29200.105 ± 0.012604.710.227.41978-12-18 to 1978-12-18gif FITSEvents
2E 1255.3+353012 57 40.5+35 13 455390 29200.059 ± 0.00230711.825.627.11980-06-30 to 1980-07-03gif FITSEvents

Einstein High Resolution Imager (HRI):

RA (2000.0)DE (2000.0)Sequence IDCount RateExposure TimeSNRObservation DateImagesData
12 57 40+35 13 3410354 30.04512 ± 0.0063212270.397.141981-01-18 to 1981-01-18gif FITSEvents



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