KIC 8462852 FADED AT AN AVERAGE RATE OF 0.164 ± 0.013 MAGNITUDES PER CENTURY FROM 1890 TO 1989

@article{Schaefer2016KIC8F,
  title={KIC 8462852 FADED AT AN AVERAGE RATE OF 0.164 ± 0.013 MAGNITUDES PER CENTURY FROM 1890 TO 1989},
  author={Bradley E. Schaefer},
  journal={The Astrophysical Journal Letters},
  year={2016},
  volume={822}
}
  • B. Schaefer
  • Published 13 January 2016
  • Physics, Geology
  • The Astrophysical Journal Letters
KIC 8462852 is a completely ordinary F3 main-sequence star, except that the light curve from Kepler shows episodes of unique and inexplicable day-long dips with up to 20% dimming. Here, I provide a light curve of 1338 Johnson B-band magnitudes from 1890 to 1989 taken from archival photographic plates at Harvard. KIC 8462852 displays a secular dimming at an average rate of 0.164 ± 0.013 mag per century. From the early-1890s to the late-1980s, KIC 8462852 faded by 0.193 ± 0.030 mag. The decline… 

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References

SHOWING 1-10 OF 17 REFERENCES

IRTF/SPEX OBSERVATIONS OF THE UNUSUAL KEPLER LIGHT CURVE SYSTEM KIC 8462852

We have utilized the NASA/IRTF 3 m SpeX instrument’s high-resolution spectral mode to observe and characterize the near-infrared flux emanating from the unusual Kepler light curve system KIC 8462852.

A STATISTICAL ANALYSIS OF THE ACCURACY OF THE DIGITIZED MAGNITUDES OF PHOTOMETRIC PLATES ON THE TIMESCALE OF DECADES WITH AN APPLICATION TO THE CENTURY-LONG LIGHT CURVE OF KIC 8462852

We present a statistical analysis of the accuracy of the digitized magnitudes of photometric plates on the timescale of decades. In our examination of archival Johnson B photometry from the Harvard

KIC 8462852: THE INFRARED FLUX

We analyzed the warm Spitzer/IRAC data of KIC 8462852. We found no evidence of infrared excess at 3.6 μm and a small excess of 0.43 ± 0.18 mJy at 4.5 μm below the 3σ threshold necessary to claim a

KIC 8462852: TRANSIT OF A LARGE COMET FAMILY

We investigate the plausibility of a cometary source of the unusual transits observed in the KIC 8462852 light curve. A single comet of similar size to those in our solar system produces a transit

Pluto's light curve in 1933–1934

The Structure of the Kuiper Belt: Size Distribution and Radial Extent

The size distribution in the Kuiper Belt records physical processes operating during the formation and subsequent evolution of the solar system. This paper reports a study of the apparent magnitude

Planet Hunters IX. KIC 8462852-where's the flux?

TSB acknowledges support provided through NASA grant ADAP12-0172 and ADAP14-0245. MCW and GMK acknowledge the support of the European Union through ERC grant number 279973. The authors acknowledge

Gamma-ray burster counterparts - Archival data

This paper reports on the results of a search for optical transient images associated with gamma-ray bursters based on the collection of archival photographs at the Harvard College Observatory. This

Improved Photometry for the DASCH Pipeline

The Digital Access to a Sky Century@Harvard (DASCH) project is digitizing the ∼500,000 glass plate images obtained (full sky) by the Harvard College Observatory from 1885 to 1992. Astrometry and

UBVRI Photometric Standard Stars Around the Celestial Equator: Updates and Additions

New broadband UBVRI photoelectric observations on the Johnson–Kron–Cousins photometric system have been made of 202 stars around the sky, and centered at the celestial equator. These stars constitute