possible supernova in nearby NGC 5002

Forums Deep Sky possible supernova in nearby NGC 5002

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  • #574694
    Robin Leadbeater
    Participant

    The ASAS-SN team report a possible supernova ASASSN-20jq/ AT2020qxp in NGC 5002 (12Mpc)

    https://wis-tns.weizmann.ac.il/object/2020qxp

    It is currently mag 16.8 and yet to be classified but a type Ia would be expected to reach ~mag 11 excluding extinction at this distance so one to watch!

    Robin

    #582983
    David Swan
    Participant

    About 3deg from Cor Caroli in CVn, for those who don’t speak NGC or can’t be bothered to look it up 😉

    #582985
    Tim Haymes
    Participant

    I imaged the galaxy through thin cloud – on Aug 9th at 2100UT. Despite the poor transparency the stacked subs indicate the transient at about 16.5 mag. (C11 at f5.5, QHY174m)

    Tim

    #582997
    Robin Leadbeater
    Participant

    A bit closer still, same part of the sky (unfortunately).  Confirmed as a 1a.  Rising rapidly, heading for ~mag 11 ?

    https://wis-tns.weizmann.ac.il/object/2020rcq

    Robin

    #583007
    Robin Leadbeater
    Participant

    SN 2020qxp is now also confirmed as a Ia and the classifiers suggest it should be near maximum light in which case it should in theory be  approaching  ~mag 11 excluding extinction in the parent galaxy.  They also compare it though with SN 2007on which was classed as “transitional” (ie with a luminosity lower than normal for a 1a but more luminous than sub luminous 91bg-types).  SN 2007on was considered a good candidate for a white dwarf merger supernova event eg

    https://arxiv.org/abs/1802.09469

    The light curve of SN 2020qxp could be interesting

    Cheers

    Robin

    #583009
    Robin Leadbeater
    Participant

    Magnitude estimates from Odd Trondal on ISN_chat last night  SN 2020qxp ~14.5     SN 2020rcq  ~13.4

    #583030
    Robin Leadbeater
    Participant

    Estimates from Stan Howerton last night give SN 2020rcq 12.5 V so still rising but SN 2020qxp at 14.5 so probably sub-luminous near maximum as suggested by the TNS classifiers

    https://www.flickr.com/photos/146026104@N07/50246735516

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