I was recently overviewing various massive compact halo object studies (the Anglo-Australian MACHO collaboration and the French I/II EROS collaboration), and they frequently reference "blue bumper stars," irregular variable stars which produce light curves very similar to gravitational microlensing event. Further searches for more information about them was mostly fruitless, producing a few conference proceedings:
- The MACHO Project LMC variable star inventory: Aperiodic blue variables (code 1995llnl.reptR....P)
- The MACHO Project LMC Variable Star Inventory: Aperiodic Blue Variables (code 1995AAS...18710202P),
but little else.
Is there any more information on this type of variable star, especially a more rigorous and targeted study of them? Also, how is it possible to get the full text for either of those articles?