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<\/a><\/h1>\nWithin the German association “Vereinigung der Sternfreunde e.V.” (VdS) we are part of the division\u00a0<\/span><\/span>\u201eVdS-Fachgruppe Astrofotografie\u201c. <\/span><\/span><\/p>\n Our\u00a0project group was established in January 2012 to\u00a0detect faint objects in\u00a0very long exposed images of galaxies with amateur telescopes. Our aim is to reach phenomena of very low surface brightness around\u00a0galaxies like tidal plumes, stellar streams or dwarf companions.\u00a0In case of new detections we are interested to get in contact with professional astronomers, in order to start discussions.\u00a0To do this, please get in contact with our\u00a0TBG team via the contact Formular<\/span><\/span><\/a>.<\/span><\/p>\n latest news:<\/span><\/strong><\/span><\/p>\n-2020-11-11: A further cooperation between the team of Prof. Dr. Karachentsev and the TBG-team could confirm 5 dwarf companions around\u00a0 M 63 (NGC 5055)<\/a> (link to publication<\/a>).<\/span><\/address>\n\u00a0<\/address>\n-2018-01-03: <\/span>In addition to his TBG activities our team member W. Probst could support F. Schweizer et al. with his image of NGC 7727 for the following scientific publication (see page 6): <\/span><\/address>\nSchweizer F. et al. (2018): The second nucleus of NGC 7727: Direct evidence for the formation and evolution of an ultracompact dwarf galaxy; ApJ, 853, 54-54. <\/span><\/address>\n(link to publication<\/a><\/span>)<\/span><\/address>\n\u00a0<\/address>\n-2017-01-10: The cooperation between the team of Prof. Dr. Karachentsev and the TBG-team could confirm, that the galaxy “MAPS-PP 0-778-973630” is a real satellite of NGC 7331<\/a>. Deep images gave the chance to notice faint tidal effects in direction to NGC 7331. Spectral investigations with the 6-m-telescope confirmed a radial velocity of vh = 763 +\/- 30 km\/s as well. This value differes from the radial velocity of NGC 7331 only around -53 +\/- 30 km\/s. We detected a further dwarf companion candidate in the TBG-image. M<\/span>orphology, surface brightness and angular diameter are typical for dSph galaxies (link to publication<\/a> \/ link to “Astrofisika”<\/a>).<\/span><\/address>\n\u00a0<\/address>\n-2016-11-17: On 2016-10-06 our member of the TBG group O. Schneider discovered a possible new dwarf companion near NGC 7454<\/a>.\u00a0It seems that this unknown dwarf can be classified as “dIrr\u00a0type” with a diameter of approximately 16600 light years.<\/span><\/address>\n\u00a0<\/address>\n– 2016-07-10: In\u00a0September 2015 the nova “PNV J01044358+0203419” occured in the local dwarf galaxy IC 1613<\/a>. Our Member Robert P\u00f6lzl had imaged this galaxy during this time. TBG-internal investigations showed that the light from this nova did not originate in the nearby planetary nebula IC 1613 PN2, which had been discovered by Magrini et al. in 2005. Nova and PN are only separated by 2-3 arcsec. It was a real pleasure to get in contact with Laura Magrini during our investigations.\u00a0<\/span><\/address>\n\u00a0<\/address>\n– 2016-04-03: The TBG-Group presents a possible new stellar stream around NGC 4725<\/a>. Regarding this discovery the German astronomical journal “Sterne und Weltraum” published an article<\/a>. <\/span><\/address>\n\u00a0<\/address>\n– 2016-03-31: The situation of nebulae around NGC 4631\/56<\/span><\/span><\/a><\/span> was described by Taylor & Wang (2003). They show a dust arc in the northern part of the galaxy.\u00a0We clearly see that deepest optical images may be used for confirmation of radio (CO) structures.\u00a0 See more details in the link to NGC 4631\/56.<\/span><\/address>\n\u00a0<\/address>\n– 2016-03-25:\u00a0An impressive\u00a0deep look into Messier 33 (NGC 598<\/a>)<\/span><\/address>\n\u00a0<\/address>\n– 2015-11-03:\u00a0Confirmation of several dwarf companions around \u00a0the following galaxies:\u00a0NGC 672<\/a>, NGC 891<\/a>, NGC 1156<\/a>, NGC 283<\/a>, NGC 3344<\/a>, NGC 4258<\/a>, NGC 4618<\/a>, NGC 4631<\/a>, and NGC 5457 <\/a>(link to publication<\/a>).\u00a0The\u00a0spectral investigations of the dwarfs of NGC 891 (see latest news: 2015-03-23<\/span>) and NGC 2683\u00a0(see\u00a0latest news: <\/span>2014-12-03<\/span>) were also published now (link to publication<\/a>). <\/span><\/address>\n\u00a0<\/span><\/address>\n– 2015-06-15: <\/span>In addition to the tidal stream discovered by Malin\u00a0& Hadley around M 104 (NGC 4594)<\/a> in 1997 [Malin, D. & Hadley, B. 1997, Publ. Astron. Soc. Australia, 14, 52], S. K\u00fcppers identified furthermore four dwarf companions – two of them seem to be unknown till now. <\/span><\/span><\/address>\n\u00a0<\/address>\n– <\/span>2015-03-23: In the field of NGC\u00a0891\u00a0one of two dwarf companions\u00a0could now be confirmed by spectral investigations. At the Russian 6-m telescope (Igor Karachentsev \/ Margarita\u00a0Sharina) a radial velocity of\u00a0692+-58 km\/s was determined.\u00a0 <\/span><\/span><\/span><\/address>\n\u00a0<\/address>\n– <\/span>2014-12-03: In the field of NGC 2683 a dwarf companion\u00a0could be confirmed by spectral investigations. At the Russian 6-m telescope a radial velocity of 380 +-25<\/span> km\/s was determined.\u00a0 <\/span><\/span><\/address>\n\u00a0<\/address>\n– <\/span>2014-09-17: Igor Karachentsev received the “ambartsumian-international-prize-2014<\/a>” (Explanation of this prize<\/a>)<\/span><\/address>\n\u00a0<\/address>\n– 2014-05-07: NGC 4631\/56<\/span><\/span><\/span><\/a>:<\/span> Possible new\u00a0giant tidal tail was detected in an image\u00a0exposed \u00a0for 50 hours.<\/span><\/address>\n\u00a0<\/address>\n\u00a0\u00a0<\/span><\/span><\/address>\n","protected":false},"excerpt":{"rendered":" Within the German association “Vereinigung der Sternfreunde e.V.” (VdS) we are part of the division\u00a0\u201eVdS-Fachgruppe Astrofotografie\u201c. Our\u00a0project group was established in January 2012 to\u00a0detect faint objects in\u00a0very long exposed images of galaxies with amateur telescopes. Our aim is to reach … Continue reading <\/a><\/p>\n