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Article overview
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A systematic search for novae in M31 on a large set of digitized archival Schmidt plate | | M. Henze
; H. Meusinger
; W. Pietsch
; | | Date: |
5 Oct 2007 | | Abstract: | This paper reports on the detection of optical novae in our neighbour galaxy
M31 based on digitized historical Tautenburg Schmidt plates. The accurate
positions of the detected novae lead to a much larger database for searches for
recurrent novae in M31. We conducted a systematic search for novae on 306
digitized Tautenburg Schmidt plates covering a time span of 36 years from 1960
to 1996. From the database of both ~ 300 000 light curves and about one million
detections on only one plate per colour band, nova candidates were efficiently
selected by automated algorithms and subsequently individually inspected by
eye. We report the detection of 84 nova candidates. In detail we found 55 nova
candidates from the automated analysis of the light curves. Among these, 22
were previously unknown, 12 were known but have not been identified on
Tautenburg Schmidt plates before and 21 novae have been discovered on
Tautenburg plates previously. An additional 29 known novae could be confirmed
by the detailed investigation of single detections. One of our newly discovered
nova candidates shows a high position coincidence with a nova detected about 30
years before. Therefore, this object is likely to be a recurrent nova.
Furthermore, we have re-investigated in detail all 41 nova candidates
previously found on Tautenburg plates and confirm them all but two. Positions
are given for all nova candidates with a typical accuracy of ~ 0.4 arcsec. We
present light curves and finding charts as online material. The analysis of the
plates has shown the wealth of information still buried in old plate archives.
Extrapolating from this survey, digitization of other historical M31 plate
archives (e.g. from the Mount Wilson or Asiago observatories) for a systematic
nova search looks very promising. | | Source: | arXiv, 0710.1194 | | Services: | Forum | Review | PDF | Favorites | |
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