Notes for 98-BLG-35

update: 14 May 1999

The planet(s):

• Detection method: Microlensing
• Basic data:
  • M:       ~ (0.4 - 1.51 Earth mass
  • Semi-major axis:      either ~1.5 AU or ~ 2.3 AU (projected on the sky)
  • Orbital period:      ?
  • Eccentricity:       ?
• Remarks:
  1. 7 March 2001; "The probability for explaining the data on MACHO 98-BLG-35 without a planet is <1%." (Bond et al., 2001)
  2. The lensing method does not provide orbital elements.
     This is not a repeatable observation..
  3. 14 january 1999: the PLANET team is proceeding an independent analysis of its own data on this event.
  4. Rhie et al 1999 give in their preprint a 4.5 sigmas significance level based on ~ half a dozen data points.
  5. References:
     1. BOND I., RATTENBYRY N., SKULJAN J., ABE F., DODD R., HEARNSHAW J., HONDA M., JUGAKU J., KILMARTIN P., MARLES A., MATSUBARA Y., MURAKI Y., NAKAMURA T., NANKIVELL G., NODA S., NOGUCHI C., OHNISHI K., REID M., SAITO To., SATO H., SEKIGUCHI M., SULLIVAN D., SUMI T., TAKEUTI M., WATASE Y., WILKINSON S., YAMADA R., YANAGISAWA T. & YOCK P., 2001
        Study by MOA of extra-solar planets in gravitational microlensing events of high magnification.
        MNRAS, submitted
        preprint
     2. RHIE S., BENNETT D., FRAGILE P., KING L., QUINN J., BECKER A., B. R. JOHNSON B., PETERSON B., ABE F., MASUDA K., MATSUBARA Y., MURAKI Y., NODA S., SATO S., SUMI T., YANAGISAWA T., BOND I., KILMARTIN M., CARTER B., DODD R., NANKIVELL G., RUMSEY N., HEARNSHAW J., HONDA M., SEKIGUCHI M., JUGAKU J., KABE S., WATASE B., NAKAMURA B., SATO H., RATTENBURY N., YOCK P., M. REID M., SULLIVAN D., SAITO T. & M. YOSHIZAWA M., 1998
        A Report from Microlensing Planet Search Collaboration: A Possible Earth Mass Planetary System found in MACHO-98-BLG-35?
        193^rd AAS meeting
        abstract
     3. RHIE S., BENNET D., BECKER A., PETERSON B., FRAGILE P., JOHNSON B., QUINN J., CROUCH A., GRAY J., KING L., MESSENGER B., THOMSON S., BOND I., ABE F., CARTER B., DODD R., HEARNSHAW J., HONDA M., JUGAKU J., KABE S., KILMARTIN P., KORIBALSKI B., MASUDA K., MATSUBARA Y., MURAKI Y., NAKAMURA T., NANKIVELL G., NODA S., RATTENBURY N., REID M., RUMSEY N., SAITO To., SATO H., SATO S., SEKIGUCHY M., SULLIVAN D., SUMI T., WATESE Y., YANAGISAWA T., YOCK P. & YOSHIZAWA M. (The MPS and MOA Collaborations), 1999
        On Planetary Companions to the MACHO-98-BLG-35 Microlens Star.
        preprint
  6. Other Web pages:
     1. Amplification light curve (MPS Collab.)
     2. Analysis of this event by the PLANET team

The star:

• Distance: In the Galactic Bulge
• Spectral type:
• Apparent magnitude:
• Absolute luminosity:
• Coordinates (2000):          
• More data:
  • Basic Data (from simbad )
  • Most recent refs. (from ADS; enter ` ' in the `objects' field)