Method for finding variable radio sources in drift-scan interferometric data from the Nasu observatory

T. Tanaka; T. Nakamizo; T. Aoki; S. Kida; K. Asuma; A. Imai; N. Furukawa; R. Hiruma; N. Matsumura; K. Takefuji; K. Niinuma; T. Daishido

doi:10.1086/666592

Method for finding variable radio sources in drift-scan interferometric data from the Nasu observatory

T. Tanaka^*, T. Nakamizo, T. Aoki, S. Kida, K. Asuma, A. Imai, N. Furukawa, R. Hiruma, N. Matsumura, K. Takefuji, K. Niinuma, T. Daishido

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

We have developed an analysis method for finding flux variabilities of the fringes in drift-scan interferometric data at 1.4 GHz obtained from the Nasu observatory. This method uses the expectation data of the Nasu observation generated from a radio sky survey catalog at 1.4 GHz, such as the NRAO VLA Sky Survey (NVSS) catalog. The variabilities are detected by comparing the power scales of the fringes in the observation data with those in the expectation data. A difference in both data fringe scales indicates the possible presence of variabilities. By using the technique described above, we analyzed the Nasu drift-scan survey results at δ = 32:5° ± 0:3°. Thus, we succeeded in finding the fringe variabilities in the data. This result indicates that our method is effective in detecting fringe variabilities in the Nasu interferometric data.

Original language	English
Pages (from-to)	616-623
Number of pages	8
Journal	Publications of the Astronomical Society of the Pacific
Volume	124
Issue number	916
DOIs	https://doi.org/10.1086/666592
Publication status	Published - 2012 Jun

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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@article{2246872973f448df8446152af2938852,

title = "Method for finding variable radio sources in drift-scan interferometric data from the Nasu observatory",

abstract = "We have developed an analysis method for finding flux variabilities of the fringes in drift-scan interferometric data at 1.4 GHz obtained from the Nasu observatory. This method uses the expectation data of the Nasu observation generated from a radio sky survey catalog at 1.4 GHz, such as the NRAO VLA Sky Survey (NVSS) catalog. The variabilities are detected by comparing the power scales of the fringes in the observation data with those in the expectation data. A difference in both data fringe scales indicates the possible presence of variabilities. By using the technique described above, we analyzed the Nasu drift-scan survey results at δ = 32:5° ± 0:3°. Thus, we succeeded in finding the fringe variabilities in the data. This result indicates that our method is effective in detecting fringe variabilities in the Nasu interferometric data.",

author = "T. Tanaka and T. Nakamizo and T. Aoki and S. Kida and K. Asuma and A. Imai and N. Furukawa and R. Hiruma and N. Matsumura and K. Takefuji and K. Niinuma and T. Daishido",

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TY - JOUR

T1 - Method for finding variable radio sources in drift-scan interferometric data from the Nasu observatory

AU - Tanaka, T.

AU - Nakamizo, T.

AU - Aoki, T.

AU - Kida, S.

AU - Asuma, K.

AU - Imai, A.

AU - Furukawa, N.

AU - Hiruma, R.

AU - Matsumura, N.

AU - Takefuji, K.

AU - Niinuma, K.

AU - Daishido, T.

PY - 2012/6

Y1 - 2012/6

N2 - We have developed an analysis method for finding flux variabilities of the fringes in drift-scan interferometric data at 1.4 GHz obtained from the Nasu observatory. This method uses the expectation data of the Nasu observation generated from a radio sky survey catalog at 1.4 GHz, such as the NRAO VLA Sky Survey (NVSS) catalog. The variabilities are detected by comparing the power scales of the fringes in the observation data with those in the expectation data. A difference in both data fringe scales indicates the possible presence of variabilities. By using the technique described above, we analyzed the Nasu drift-scan survey results at δ = 32:5° ± 0:3°. Thus, we succeeded in finding the fringe variabilities in the data. This result indicates that our method is effective in detecting fringe variabilities in the Nasu interferometric data.

AB - We have developed an analysis method for finding flux variabilities of the fringes in drift-scan interferometric data at 1.4 GHz obtained from the Nasu observatory. This method uses the expectation data of the Nasu observation generated from a radio sky survey catalog at 1.4 GHz, such as the NRAO VLA Sky Survey (NVSS) catalog. The variabilities are detected by comparing the power scales of the fringes in the observation data with those in the expectation data. A difference in both data fringe scales indicates the possible presence of variabilities. By using the technique described above, we analyzed the Nasu drift-scan survey results at δ = 32:5° ± 0:3°. Thus, we succeeded in finding the fringe variabilities in the data. This result indicates that our method is effective in detecting fringe variabilities in the Nasu interferometric data.

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JO - Publications of the Astronomical Society of the Pacific

JF - Publications of the Astronomical Society of the Pacific

IS - 916

ER -

Method for finding variable radio sources in drift-scan interferometric data from the Nasu observatory

Abstract

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