SN 1987A in the Large Magellanic Cloud. IV - Photometry from the spectrophotometry

Details SN 1987A in the Large Magellanic Cloud. IV - Photometry from the spectrophotometry SN 1987A in the Large Magellanic Cloud. IV - Photometry from the spectrophotometry

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pasp..102..888h&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 102, Aug. 1990, p. 888-897. Research supported by the F

Astronomy and Astrophysics

Astronomy

20

Astronomical Photometry, Light Curve, Magellanic Clouds, Stellar Spectrophotometry, Supernova 1987A, Brightness, Charge Coupled Devices, Emission Spectra, Phototubes, Stellar Luminosity

Scientific paper

Systematic differences in the UBVRI photometry of SN 1987A exist between the published photometry from CTIO and SAAO. The largest differences occur in the I band where the SAAO photometry is up to 0.4 magnitude brighter than the CTIO photometry. The filter/phototube response of the CTIO system has been measured and VRI photometry from the CCD spectrophotometry of SN 1987A obtained at CTIO has been synthesized. The differences between the synthesized and photoelectric photometry for both the CTIO and SAAO natural systems are less than 0.05 magnitude. This confirms a previous suggestion that the nonstellar nature of the supernova spectrum can give rise to large systematic errors in photometry obtained at different sites. The comparison of the light curves of any two supernovae can be in error by a similar amount due to the different natural photometric systems.

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