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J/A+A/598/A40       Separation and confirmation of showers     (Neslusan+, 2017)

The separation and confirmation of showers. Neslusan L., Hajdukova M.Jr. <Astron. Astrophys. 598, A40 (2017)> =2017A&A...598A..40N (SIMBAD/NED BibCode)
ADC_Keywords: Comets Keywords: meteorites, meteors, meteoroids - catalogs - methods: data analysis Abstract: Using IAU MDC photographic, IAU MDC CAMS video, SonotaCo video, and EDMOND video databases, we aim to separate all provable annual meteor showers from each of these databases. We intend to reveal the problems inherent in this procedure and answer the question whether the databases are complete and the methods of separation used are reliable. We aim to evaluate the statistical significance of each separated shower. In this respect, we intend to give a list of reliably separated showers rather than a list of the maximum possible number of showers. Description: To separate the showers, we simultaneously used two methods. The use of two methods enables us to compare their results, and this can indicate the reliability of the methods. To evaluate the statistical significance, we suggest a new method based on the ideas of the break-point method. We give a compilation of the showers from all four databases using both methods. Using the first (second) method, we separated 107 (133) showers, which are in at least one of the databases used. These relatively low numbers are a consequence of discarding any candidate shower with a poor statistical significance. Most of the separated showers were identified as meteor showers from the IAU MDC list of all showers. Many of them were identified as several of the showers in the list. This proves that many showers have been named multiple times with different names. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablea1.dat 144 107 *The characteristics of the showers separated from the used databases by the MoI method tablea2.dat 144 133 *The characteristics of the showers separated from the used databases by the MoR& method
Note on tablea1.dat: MoI : method of indices (Svoren et al., 2000, Planet. Space Sci., 48, 933). Note on tablea2.dat: MoR& : method suggested and described by Rudawska et al. (2015, Planet. Space Sci., 118, 38).
See also: J/A+A/287/990 : Meteor stream activity. I. (Jenniskens 1994) J/A+A/295/206 : Meteor stream activity. II. (Jenniskens, 1995) J/A+A/320/631 : Meteor streams detected among 502TV (Jopek+ 1997) J/A+AS/128/179 : Precision meteor orbits (Betlem+ 1998) J/A+A/580/A67 : Catalogue of representative meteor spectra (Vojacek+, 2015) Byte-by-byte Description of file: tablea1.dat tablea2.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Shower Shower number and abbreviation in the IAU MDC list of showers or our number 11- 12 A2 --- Class Class of reliability 15 A1 --- DB Database from which the listed shower was separated (1) 18- 22 F5.1 deg lambdaSun Mean solar longitude 24- 28 F5.1 deg e_lambdaSun rms uncertainty on lambdaSun 30- 34 F5.3 AU q Mean perihelion distance 36- 40 F5.3 AU e_q rms uncertainty on q 43- 47 F5.3 --- e Mean eccentricity 49- 53 F5.3 --- e_e rms uncertainty on e 56- 60 F5.1 deg omega Mean argument of perihelion 62- 65 F4.1 deg e_omega rms uncertainty on omega 68- 72 F5.1 deg Omega Mean longitude of ascending node 74- 77 F4.1 deg e_Omega rms uncertainty on Omega 80- 84 F5.1 deg i Mean inclination to the ecliptic 86- 89 F4.1 deg e_i rms uncertainty on i 92- 96 F5.1 deg RAg Mean right ascension of geocentric radiant 98-102 F5.1 deg e_RAg rms uncertainty on RAg 104-108 F5.1 deg DEg Mean declination of geocentric radiant 110-113 F4.1 deg e_DEg rms uncertainty on DEg 115-118 F4.1 km/s Vg Mean geocentric velocity 120-122 F3.1 km/s e_Vg rms uncertainty on Vg 125-128 F4.1 km/s Vh Mean heliocentric velocity 130-132 F3.1 km/s e_Vh rms uncertainty on Vh 135-138 I4 --- N Number of separated meteors of given shower 141-144 F4.2 --- Dlim Limiting value of the Southworth-Hawkins D-discriminant at which the shower was separated
Note (1): we give the given shower separated from that database, in which the value of limiting D-discriminant was the lowest. Abbreviations of the used databases as follows: F = photographic IAU MDC database C = CAMS video-database S = SonotaCo video-database E = EDMOND video-database
Acknowledgements: Lubos Neslusan, ne(at)
(End) Patricia Vannier [CDS] 02-Nov-2016
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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