3 blue transients - Aug 2012

LSQ12dlf

Orphan, definite ULSN, 2010gx like, z=0.3. No galaxy emission lines but features need z=0.3 to match 2010gx-like SN.

First detection : 20120710 2456118.8593
Peak in LSQ LC  : 20120730

Date     Phase      Data          Comment 
20120710  -20       m=18.7         LSQ 
20120722  -8        m=18.3         "
20120730   0        m=18.2         " (7 epochs LSQ data from 20120710 - 20120730) 
20120807  +8        Gr#13          Blue continuum 
20120809  +10      Gr11+16/UBVRi   Good S/N, 10gx like z=0.3 
20120811  +11       gri            LCOGT-FTS
20120812  +12       UBVri          LT
20120813  +13       griz           LCOGT-FTS
20120816  +16       griz           LCOGT-FTS
20120818  +19       Gr#13/UBVRi    Good S/N, 10gx like at +20d (matches phase) 
20120818  +19       UBVri          LT        
20120825  +26       Gr#13/UBVRi
20120909  +41       Gr#13
20120915  +47      BVRi
Latest epoch of imaging 
20121107  +99       BVRi 600s each  R~21.5 (Good data)

LSQ12dyw

Host galaxy, not blue starforming galaxy. z=0.09 from H-alpha/[NII], reddish in SDSS

First detection : 20120717 
Peak in LSQ LC  : 20120808 - 20120810 (broad) 

Date      Phase      Data          Comment 
20120717   -22      m=19.3         LSQ 
20120727   -12      m=18.8         LSQ 
20120807   ~0       Gr#13          Blue continuum 
20120808   ~0        m=18.5        LSQ, around peak, but peak seems broad
20120808   ~0     Gr11+Gr16 UBVRi
20120810   ~+2      m=18.5         LSQ
20120812   +4       UBVri          LT
20120818   +10      UBVri          LT        
20120825   +17       Gr#13/UBVRi 
20120909   +32     Gr#13
20120915   +38    Gr#13/UBVRi

SSS120810:231802-560926

First detection : 20120810 (CRTS - SSS) 
Peak in LSQ LC  : ?? 

No useful constrain in explosion - previous SSS image was from May 2012. Check with LSQ (and skymapper ?)

Date      Phase      Data          Comment 
20120810   ?         m=18.0         SSS photometry
20120817   ?         Gr#13           Blue continuum
20120818   ?        Gm13+UBVRi       comparison with 10gx it seems at +7d from maximum lights and a redshift close to 0.34 (if the z is correct the abs magnitude at the discovery should be -23.2)??
20120825   ?        Gr#13/UBVRi
20120906   ?       Gr#13/UBVRi
20120915   ?        Gr#13/UBVRi
20121010           B(100s) VRi (200s each)    r = ~ 20 mag 
                           B needs longer,VRi OK.
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