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OEJV# Publication's title Author   Date
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0088108 New Variable Stars in the NSVS Database
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Maxim Usatov, Artem Nosulchik2008-05-08
 In this paper we present 105 SR+L, 1 Orion T Tau and 2 RS CVn type variable stars found in the Northern Sky Variability Survey (NSVS) database. This work is designated to complement and finalize our previous publication of the Extended Catalog of Red AGB Variable Stars found in the NSVS database as is primarily designated to find SR+L stars. While the previous work employed the AOV ratio cutoff at >1.6 to pick stars showing slow variability pattern, we have manually processed all the remaining objects originally filtered out by the smaller AOV ratio and picked the ones with light curves showing obvious variability pattern. All the stars presented have no identification in General Catalogue of Variable Stars, SIMBAD and VSX databases thus most likely the stars presented are new discoveries.

Simbad object(s): 2MASS J20433466-0736475, 2MASS J17470357-1237151, 2MASS J17372172-0940359, 2MASS J08262938-1927037, 2MASS J05520873-2208100, 2MASS J05432701-0959375, 2MASS J20100180+0238133, 2MASS J20013484+0459252, 2MASS J20083061-0245583, 2MASS J19574292-0145397, 2MASS J19081342-0612469, 2MASS J18301526+0702188, 2MASS J18245505-0057143, 2MASS J18141768-0104597, 2MASS J18113558-0219464, 2MASS J17593613-0125033, 2MASS J17573307-0336121, 2MASS J17530373+0342451, 2MASS J08405392-0509358, 2MASS J05581071-0255185, ...

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John Greaves wrote 2008-05-09:
About a dozen of the objects are misidentified with the wrong 2MASS object, the erroneous cases are especially evident if a plot of MAX-J versus J-Ks is used. Similar, but two to three dozen objects, occur for OEJV 87. This is why it can be safest to use the name of the investigated object, ie the NSVS identity in this instance, rather than hoping to have made no cross identification errors. As a consequence of this a few dozen 2MASS objects will now be incorrectly entered into SIMBAD as variable, whilst the truly variable 2MASS objects, oft times much brighter in J and Ks than the mistaken identities, will still be unknown as variable.

Although the ROTSE1 system has a 14.4\" per pixel resolution, the practical limit is usually several pixels, and in some cases the NSVS astrometry is nearly an arcminute poor, see for instance the erroneous 2MASS identification objects in Cassiopeia.

This has to be taken into account on a just in case level, though note the papers\' methods have worked for by far the vast majority of objects.

Nice hard worked paper.


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