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[vsnet-campaign-sn 149] SN Ib 2001B
Dear SN watchers,
SN 2001B (vsnet-alert 5523, vsnet-campaign-sn 126) has been revealed
as of type Ib, not Ia as reported earlier. Jan. 23 spectrum tells
that it was about 1 week past maximum, which is coincident with
vsnet-reported observations (max around mag 14.5 at Jan 15).
Generally, SN Ib has a maximum 1 magnitude dimmer than normal SN Ia.
As the expected maximum for SN Ia was 13.3, the vsnet light curve
shows very good agreement with it. Also, SN Ib tend to show slower
decline than SN Ia, so it will remain bright longer. After the
separation of subtype SN Ic, SN Ib has little been discovered and
observed. The followup photometry is encouraged for this relatively
rare event.
Sincerely Yours,
Hitoshi Yamaoka, Kyushu Univ., Japan
yamaoka@rc.kyushu-u.ac.jp
vsnet-adm@kusastro.kyoto-u.ac.jp
Return to Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
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