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Massive stars exploding in a He-rich circumstellar medium โ VI. Observations of two distant Type Ibn supernova candidates discovered by La Silla-QUEST
We present optical observations of the peculiar stripped-envelope supernovae (SNe) LSQ12btw and LSQ13ccw discovered by the La Silla-QUEST survey. LSQ12btw reaches an absolute peak magnitude of M(g) = -19.3 +- 0.2, and shows an asymmetric light curve. Stringent prediscovery limits constrain its rise time to maximum light to less than โฆ