The Atacama Cosmology Telescope: Systematic Transient Search of 3 Day Maps

Yaqiong Li; Emily Biermann; Sigurd Naess; Simone Aiola; Rui An; Nicholas Battaglia; Tanay Bhandarkar; Erminia Calabrese; Steve K. Choi; Kevin T. Crowley; Mark Devlin; Cody J. Duell; Shannon M. Duff; Jo Dunkley; Rolando Dünner; Patricio A. Gallardo; Yilun Guan; Carlos Hervías-Caimapo; Adam D. Hincks; Johannes Hubmayr; Kevin M. Huffenberger; John P. Hughes; Arthur Kosowsky; Thibaut Louis; Maya Mallaby-Kay; Jeff McMahon; Federico Nati; Michael D. Niemack; John Orlowski-Scherer; Lyman Page; Maria Salatino; Cristóbal Sifón; Suzanne T. Staggs; Cristian Vargas; Eve M. Vavagiakis; Yuhan Wang; Edward J. Wollack

doi:10.3847/1538-4357/ace599

The Atacama Cosmology Telescope: Systematic Transient Search of 3 Day Maps

Yaqiong Li, Emily Biermann, Sigurd Naess, Simone Aiola, Rui An, Nicholas Battaglia, Tanay Bhandarkar, Erminia Calabrese, Steve K. Choi, Kevin T. Crowley, Mark Devlin, Cody J. Duell, Shannon M. Duff, Jo Dunkley, Rolando Dünner, Patricio A. Gallardo, Yilun Guan, Carlos Hervías-Caimapo, Adam D. Hincks, Johannes HubmayrKevin M. Huffenberger, John P. Hughes, Arthur Kosowsky, Thibaut Louis, Maya Mallaby-Kay, Jeff McMahon, Federico Nati, Michael D. Niemack, John Orlowski-Scherer, Lyman Page, Maria Salatino, Cristóbal Sifón, Suzanne T. Staggs, Cristian Vargas, Eve M. Vavagiakis, Yuhan Wang, Edward J. Wollack

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Abstract

We conduct a systematic search for transients in 3 yr of data (2017-2019) from the Atacama Cosmology Telescope (ACT). ACT covers 40% of the sky at three bands spanning from 77-277 GHz. Analysis of 3 day mean-subtracted sky maps, which were match filtered for point sources, yielded 29 transient detections. Eight of these transients are due to known asteroids, and three others were previously published. Four of these events occur in areas with poor noise models and thus we cannot be confident they are real transients. We are left with 14 new transient events occurring at 11 unique locations. All of these events are associated with either rotationally variable stars or cool stars. Ten events have flat or falling spectra indicating radiation from synchrotron emission. One event has a rising spectrum indicating a different engine for the flare.

Original language	English (US)
Article number	36
Journal	Astrophysical Journal
Volume	956
Issue number	1
DOIs	https://doi.org/10.3847/1538-4357/ace599
State	Published - Oct 1 2023

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/1538-4357/ace599

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Li, Y., Biermann, E., Naess, S., Aiola, S., An, R., Battaglia, N., Bhandarkar, T., Calabrese, E., Choi, S. K., Crowley, K. T., Devlin, M., Duell, C. J., Duff, S. M., Dunkley, J., Dünner, R., Gallardo, P. A., Guan, Y., Hervías-Caimapo, C., Hincks, A. D., ... Wollack, E. J. (2023). The Atacama Cosmology Telescope: Systematic Transient Search of 3 Day Maps. Astrophysical Journal, 956(1), Article 36. https://doi.org/10.3847/1538-4357/ace599

@article{5db72538a966468281592c30ae9da206,

title = "The Atacama Cosmology Telescope: Systematic Transient Search of 3 Day Maps",

abstract = "We conduct a systematic search for transients in 3 yr of data (2017-2019) from the Atacama Cosmology Telescope (ACT). ACT covers 40% of the sky at three bands spanning from 77-277 GHz. Analysis of 3 day mean-subtracted sky maps, which were match filtered for point sources, yielded 29 transient detections. Eight of these transients are due to known asteroids, and three others were previously published. Four of these events occur in areas with poor noise models and thus we cannot be confident they are real transients. We are left with 14 new transient events occurring at 11 unique locations. All of these events are associated with either rotationally variable stars or cool stars. Ten events have flat or falling spectra indicating radiation from synchrotron emission. One event has a rising spectrum indicating a different engine for the flare.",

author = "Yaqiong Li and Emily Biermann and Sigurd Naess and Simone Aiola and Rui An and Nicholas Battaglia and Tanay Bhandarkar and Erminia Calabrese and Choi, {Steve K.} and Crowley, {Kevin T.} and Mark Devlin and Duell, {Cody J.} and Duff, {Shannon M.} and Jo Dunkley and Rolando D{\"u}nner and Gallardo, {Patricio A.} and Yilun Guan and Carlos Herv{\'i}as-Caimapo and Hincks, {Adam D.} and Johannes Hubmayr and Huffenberger, {Kevin M.} and Hughes, {John P.} and Arthur Kosowsky and Thibaut Louis and Maya Mallaby-Kay and Jeff McMahon and Federico Nati and Niemack, {Michael D.} and John Orlowski-Scherer and Lyman Page and Maria Salatino and Crist{\'o}bal Sif{\'o}n and Staggs, {Suzanne T.} and Cristian Vargas and Vavagiakis, {Eve M.} and Yuhan Wang and Wollack, {Edward J.}",

note = "Publisher Copyright: {\textcopyright} 2023. The Author(s). Published by the American Astronomical Society.",

year = "2023",

month = oct,

day = "1",

doi = "10.3847/1538-4357/ace599",

language = "English (US)",

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issn = "0004-637X",

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Li, Y, Biermann, E, Naess, S, Aiola, S, An, R, Battaglia, N, Bhandarkar, T, Calabrese, E, Choi, SK, Crowley, KT, Devlin, M, Duell, CJ, Duff, SM, Dunkley, J, Dünner, R, Gallardo, PA, Guan, Y, Hervías-Caimapo, C, Hincks, AD, Hubmayr, J, Huffenberger, KM, Hughes, JP, Kosowsky, A, Louis, T, Mallaby-Kay, M, McMahon, J, Nati, F, Niemack, MD, Orlowski-Scherer, J, Page, L, Salatino, M, Sifón, C, Staggs, ST, Vargas, C, Vavagiakis, EM, Wang, Y & Wollack, EJ 2023, 'The Atacama Cosmology Telescope: Systematic Transient Search of 3 Day Maps', Astrophysical Journal, vol. 956, no. 1, 36. https://doi.org/10.3847/1538-4357/ace599

TY - JOUR

T1 - The Atacama Cosmology Telescope

T2 - Systematic Transient Search of 3 Day Maps

AU - Li, Yaqiong

AU - Biermann, Emily

AU - Naess, Sigurd

AU - Aiola, Simone

AU - An, Rui

AU - Battaglia, Nicholas

AU - Bhandarkar, Tanay

AU - Calabrese, Erminia

AU - Choi, Steve K.

AU - Crowley, Kevin T.

AU - Devlin, Mark

AU - Duell, Cody J.

AU - Duff, Shannon M.

AU - Dunkley, Jo

AU - Dünner, Rolando

AU - Gallardo, Patricio A.

AU - Guan, Yilun

AU - Hervías-Caimapo, Carlos

AU - Hincks, Adam D.

AU - Hubmayr, Johannes

AU - Huffenberger, Kevin M.

AU - Hughes, John P.

AU - Kosowsky, Arthur

AU - Louis, Thibaut

AU - Mallaby-Kay, Maya

AU - McMahon, Jeff

AU - Nati, Federico

AU - Niemack, Michael D.

AU - Orlowski-Scherer, John

AU - Page, Lyman

AU - Salatino, Maria

AU - Sifón, Cristóbal

AU - Staggs, Suzanne T.

AU - Vargas, Cristian

AU - Vavagiakis, Eve M.

AU - Wang, Yuhan

AU - Wollack, Edward J.

PY - 2023/10/1

Y1 - 2023/10/1

N2 - We conduct a systematic search for transients in 3 yr of data (2017-2019) from the Atacama Cosmology Telescope (ACT). ACT covers 40% of the sky at three bands spanning from 77-277 GHz. Analysis of 3 day mean-subtracted sky maps, which were match filtered for point sources, yielded 29 transient detections. Eight of these transients are due to known asteroids, and three others were previously published. Four of these events occur in areas with poor noise models and thus we cannot be confident they are real transients. We are left with 14 new transient events occurring at 11 unique locations. All of these events are associated with either rotationally variable stars or cool stars. Ten events have flat or falling spectra indicating radiation from synchrotron emission. One event has a rising spectrum indicating a different engine for the flare.

AB - We conduct a systematic search for transients in 3 yr of data (2017-2019) from the Atacama Cosmology Telescope (ACT). ACT covers 40% of the sky at three bands spanning from 77-277 GHz. Analysis of 3 day mean-subtracted sky maps, which were match filtered for point sources, yielded 29 transient detections. Eight of these transients are due to known asteroids, and three others were previously published. Four of these events occur in areas with poor noise models and thus we cannot be confident they are real transients. We are left with 14 new transient events occurring at 11 unique locations. All of these events are associated with either rotationally variable stars or cool stars. Ten events have flat or falling spectra indicating radiation from synchrotron emission. One event has a rising spectrum indicating a different engine for the flare.

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U2 - 10.3847/1538-4357/ace599

DO - 10.3847/1538-4357/ace599

M3 - Article

AN - SCOPUS:85175798664

SN - 0004-637X

VL - 956

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 36

ER -

The Atacama Cosmology Telescope: Systematic Transient Search of 3 Day Maps

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