Standard

Ultra-precise monitoring of a class I methanol maser. / Voronkov, M. A.; Breen, S. L.; Ellingsen, S. P. et al.
In: Proceedings of the International Astronomical Union, Vol. 18, No. S380, 01.12.2022, p. 255-257.

Research output: Contribution to journal › Conference article › peer-review

Harvard

Voronkov, MA, Breen, SL, Ellingsen, SP, Green, JA, Sobolev, AM, Parfenov, SY & Van Der Walt, DJ 2022, 'Ultra-precise monitoring of a class I methanol maser', Proceedings of the International Astronomical Union, vol. 18, no. S380, pp. 255-257. https://doi.org/10.1017/S1743921323001941

APA

Voronkov, M. A., Breen, S. L., Ellingsen, S. P., Green, J. A., Sobolev, A. M., Parfenov, S. Y., & Van Der Walt, D. J. (2022). Ultra-precise monitoring of a class I methanol maser. Proceedings of the International Astronomical Union, 18(S380), 255-257. https://doi.org/10.1017/S1743921323001941

Vancouver

Voronkov MA, Breen SL, Ellingsen SP, Green JA, Sobolev AM, Parfenov SY et al. Ultra-precise monitoring of a class I methanol maser. Proceedings of the International Astronomical Union. 2022 Dec 1;18(S380):255-257. doi: 10.1017/S1743921323001941

Author

Voronkov, M. A. ; Breen, S. L. ; Ellingsen, S. P. et al. / Ultra-precise monitoring of a class I methanol maser. In: Proceedings of the International Astronomical Union. 2022 ; Vol. 18, No. S380. pp. 255-257.

BibTeX

@article{7088f6043ffc401094fc137ef0ce54ee,
title = "Ultra-precise monitoring of a class I methanol maser",
abstract = "We report the results of a 7-year monitoring program using the Australia Telescope Compact Array (ATCA) for the 9.9 GHz class I methanol maser in G331.13-0.24 where a periodic class II methanol maser is present. The great deal of the project was to control systematics at an unprecedented level. Although no periodic flux variation was found, the maser shows a very stable decline of 166±7 Jy/day. The radial velocity of the maser is stable down to 1 m/s level. We also report a marginal periodic signal in radial velocity (comparable to the level of systematics) of about 20±7 cm/s with the period of 475±22 days, close to that of the 6.7-GHz maser in the source. No hyperfine split was detected which suggests preferential excitation of a single hyperfine transition.",
author = "Voronkov, {M. A.} and Breen, {S. L.} and Ellingsen, {S. P.} and Green, {J. A.} and Sobolev, {A. M.} and Parfenov, {S. Yu.} and {Van Der Walt}, {D. J.}",
year = "2022",
month = dec,
day = "1",
doi = "10.1017/S1743921323001941",
language = "English",
volume = "18",
pages = "255--257",
journal = "Proceedings of the International Astronomical Union",
issn = "1743-9213",
publisher = "Cambridge University Press",
number = "S380",

}

RIS

TY - JOUR

T1 - Ultra-precise monitoring of a class I methanol maser

AU - Voronkov, M. A.

AU - Breen, S. L.

AU - Ellingsen, S. P.

AU - Green, J. A.

AU - Sobolev, A. M.

AU - Parfenov, S. Yu.

AU - Van Der Walt, D. J.

PY - 2022/12/1

Y1 - 2022/12/1

N2 - We report the results of a 7-year monitoring program using the Australia Telescope Compact Array (ATCA) for the 9.9 GHz class I methanol maser in G331.13-0.24 where a periodic class II methanol maser is present. The great deal of the project was to control systematics at an unprecedented level. Although no periodic flux variation was found, the maser shows a very stable decline of 166±7 Jy/day. The radial velocity of the maser is stable down to 1 m/s level. We also report a marginal periodic signal in radial velocity (comparable to the level of systematics) of about 20±7 cm/s with the period of 475±22 days, close to that of the 6.7-GHz maser in the source. No hyperfine split was detected which suggests preferential excitation of a single hyperfine transition.

AB - We report the results of a 7-year monitoring program using the Australia Telescope Compact Array (ATCA) for the 9.9 GHz class I methanol maser in G331.13-0.24 where a periodic class II methanol maser is present. The great deal of the project was to control systematics at an unprecedented level. Although no periodic flux variation was found, the maser shows a very stable decline of 166±7 Jy/day. The radial velocity of the maser is stable down to 1 m/s level. We also report a marginal periodic signal in radial velocity (comparable to the level of systematics) of about 20±7 cm/s with the period of 475±22 days, close to that of the 6.7-GHz maser in the source. No hyperfine split was detected which suggests preferential excitation of a single hyperfine transition.

UR - http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=85185759344

U2 - 10.1017/S1743921323001941

DO - 10.1017/S1743921323001941

M3 - Conference article

VL - 18

SP - 255

EP - 257

JO - Proceedings of the International Astronomical Union

JF - Proceedings of the International Astronomical Union

SN - 1743-9213

IS - S380

ER -

ID: 53845812