THE TIME DOMAIN SPECTROSCOPIC SURVEY: VARIABLE SELECTION and ANTICIPATED RESULTS

Eric Morganson; Paul J. Green; Scott F. Anderson; John J. Ruan; Adam D. Myers; Michael Eracleous; Brandon Kelly; Carlos Badenes; Eduardo Bañados; Michael R. Blanton; Matthew A. Bershady; Jura Borissova; William Nielsen Brandt; William S. Burgett; Kenneth Chambers; Peter W. Draper; James R.A. Davenport; Heather Flewelling; Peter Garnavich; Suzanne L. Hawley; Klaus W. Hodapp; Jedidah C. Isler; Nick Kaiser; Karen Kinemuchi; Rolf P. Kudritzki; Nigel Metcalfe; Jeffrey S. Morgan; Isabelle Pâris; Mahmoud Parvizi; Radosław Poleski; Paul A. Price; Mara Salvato; Tom Shanks; Eddie F. Schlafly; Donald P. Schneider; Yue Shen; Keivan Stassun; John T. Tonry; Fabian Walter; Chris Z. Waters

doi:10.1088/0004-637X/806/2/244

THE TIME DOMAIN SPECTROSCOPIC SURVEY: VARIABLE SELECTION and ANTICIPATED RESULTS

Eric Morganson, Paul J. Green, Scott F. Anderson, John J. Ruan, Adam D. Myers, Michael Eracleous, Brandon Kelly, Carlos Badenes, Eduardo Bañados, Michael R. Blanton, Matthew A. Bershady, Jura Borissova, William Nielsen Brandt, William S. Burgett, Kenneth Chambers, Peter W. Draper, James R.A. Davenport, Heather Flewelling, Peter Garnavich, Suzanne L. HawleyKlaus W. Hodapp, Jedidah C. Isler, Nick Kaiser, Karen Kinemuchi, Rolf P. Kudritzki, Nigel Metcalfe, Jeffrey S. Morgan, Isabelle Pâris, Mahmoud Parvizi, Radosław Poleski, Paul A. Price, Mara Salvato, Tom Shanks, Eddie F. Schlafly, Donald P. Schneider, Yue Shen, Keivan Stassun, John T. Tonry, Fabian Walter, Chris Z. Waters

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

Abstract

We present the selection algorithm and anticipated results for the Time Domain Spectroscopic Survey (TDSS). TDSS is an Sloan Digital Sky Survey (SDSS)-IV Extended Baryon Oscillation Spectroscopic Survey (eBOSS) subproject that will provide initial identification spectra of approximately 220,000 luminosity-variable objects (variable stars and active galactic nuclei across 7500 deg² selected from a combination of SDSS and multi-epoch Pan-STARRS1 photometry. TDSS will be the largest spectroscopic survey to explicitly target variable objects, avoiding pre-selection on the basis of colors or detailed modeling of specific variability characteristics. Kernel Density Estimate analysis of our target population performed on SDSS Stripe 82 data suggests our target sample will be 95% pure (meaning 95% of objects we select have genuine luminosity variability of a few magnitudes or more). Our final spectroscopic sample will contain roughly 135,000 quasars and 85,000 stellar variables, approximately 4000 of which will be RR Lyrae stars which may be used as outer Milky Way probes. The variability-selected quasar population has a smoother redshift distribution than a color-selected sample, and variability measurements similar to those we develop here may be used to make more uniform quasar samples in large surveys. The stellar variable targets are distributed fairly uniformly across color space, indicating that TDSS will obtain spectra for a wide variety of stellar variables including pulsating variables, stars with significant chromospheric activity, cataclysmic variables, and eclipsing binaries. TDSS will serve as a pathfinder mission to identify and characterize the multitude of variable objects that will be detected photometrically in even larger variability surveys such as Large Synoptic Survey Telescope.

Original language	English (US)
Article number	244
Journal	Astrophysical Journal
Volume	806
Issue number	2
DOIs	https://doi.org/10.1088/0004-637X/806/2/244
State	Published - Jun 20 2015

Keywords

quasars: supermassive black holes
stars: variables: general
surveys

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1088/0004-637X/806/2/244

Cite this

Morganson, E., Green, P. J., Anderson, S. F., Ruan, J. J., Myers, A. D., Eracleous, M., Kelly, B., Badenes, C., Bañados, E., Blanton, M. R., Bershady, M. A., Borissova, J., Brandt, W. N., Burgett, W. S., Chambers, K., Draper, P. W., Davenport, J. R. A., Flewelling, H., Garnavich, P., ... Waters, C. Z. (2015). THE TIME DOMAIN SPECTROSCOPIC SURVEY: VARIABLE SELECTION and ANTICIPATED RESULTS. Astrophysical Journal, 806(2), Article 244. https://doi.org/10.1088/0004-637X/806/2/244

Morganson, E, Green, PJ, Anderson, SF, Ruan, JJ, Myers, AD, Eracleous, M, Kelly, B, Badenes, C, Bañados, E, Blanton, MR, Bershady, MA, Borissova, J, Brandt, WN, Burgett, WS, Chambers, K, Draper, PW, Davenport, JRA, Flewelling, H, Garnavich, P, Hawley, SL, Hodapp, KW, Isler, JC, Kaiser, N, Kinemuchi, K, Kudritzki, RP, Metcalfe, N, Morgan, JS, Pâris, I, Parvizi, M, Poleski, R, Price, PA, Salvato, M, Shanks, T, Schlafly, EF, Schneider, DP, Shen, Y, Stassun, K, Tonry, JT, Walter, F & Waters, CZ 2015, 'THE TIME DOMAIN SPECTROSCOPIC SURVEY: VARIABLE SELECTION and ANTICIPATED RESULTS', Astrophysical Journal, vol. 806, no. 2, 244. https://doi.org/10.1088/0004-637X/806/2/244

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title = "THE TIME DOMAIN SPECTROSCOPIC SURVEY: VARIABLE SELECTION and ANTICIPATED RESULTS",

abstract = "We present the selection algorithm and anticipated results for the Time Domain Spectroscopic Survey (TDSS). TDSS is an Sloan Digital Sky Survey (SDSS)-IV Extended Baryon Oscillation Spectroscopic Survey (eBOSS) subproject that will provide initial identification spectra of approximately 220,000 luminosity-variable objects (variable stars and active galactic nuclei across 7500 deg2 selected from a combination of SDSS and multi-epoch Pan-STARRS1 photometry. TDSS will be the largest spectroscopic survey to explicitly target variable objects, avoiding pre-selection on the basis of colors or detailed modeling of specific variability characteristics. Kernel Density Estimate analysis of our target population performed on SDSS Stripe 82 data suggests our target sample will be 95% pure (meaning 95% of objects we select have genuine luminosity variability of a few magnitudes or more). Our final spectroscopic sample will contain roughly 135,000 quasars and 85,000 stellar variables, approximately 4000 of which will be RR Lyrae stars which may be used as outer Milky Way probes. The variability-selected quasar population has a smoother redshift distribution than a color-selected sample, and variability measurements similar to those we develop here may be used to make more uniform quasar samples in large surveys. The stellar variable targets are distributed fairly uniformly across color space, indicating that TDSS will obtain spectra for a wide variety of stellar variables including pulsating variables, stars with significant chromospheric activity, cataclysmic variables, and eclipsing binaries. TDSS will serve as a pathfinder mission to identify and characterize the multitude of variable objects that will be detected photometrically in even larger variability surveys such as Large Synoptic Survey Telescope.",

keywords = "quasars: supermassive black holes, stars: variables: general, surveys",

author = "Eric Morganson and Green, {Paul J.} and Anderson, {Scott F.} and Ruan, {John J.} and Myers, {Adam D.} and Michael Eracleous and Brandon Kelly and Carlos Badenes and Eduardo Ba{\~n}ados and Blanton, {Michael R.} and Bershady, {Matthew A.} and Jura Borissova and Brandt, {William Nielsen} and Burgett, {William S.} and Kenneth Chambers and Draper, {Peter W.} and Davenport, {James R.A.} and Heather Flewelling and Peter Garnavich and Hawley, {Suzanne L.} and Hodapp, {Klaus W.} and Isler, {Jedidah C.} and Nick Kaiser and Karen Kinemuchi and Kudritzki, {Rolf P.} and Nigel Metcalfe and Morgan, {Jeffrey S.} and Isabelle P{\^a}ris and Mahmoud Parvizi and Rados{\l}aw Poleski and Price, {Paul A.} and Mara Salvato and Tom Shanks and Schlafly, {Eddie F.} and Schneider, {Donald P.} and Yue Shen and Keivan Stassun and Tonry, {John T.} and Fabian Walter and Waters, {Chris Z.}",

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doi = "10.1088/0004-637X/806/2/244",

language = "English (US)",

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journal = "Astrophysical Journal",

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T1 - THE TIME DOMAIN SPECTROSCOPIC SURVEY

T2 - VARIABLE SELECTION and ANTICIPATED RESULTS

AU - Morganson, Eric

AU - Green, Paul J.

AU - Anderson, Scott F.

AU - Ruan, John J.

AU - Myers, Adam D.

AU - Eracleous, Michael

AU - Kelly, Brandon

AU - Badenes, Carlos

AU - Bañados, Eduardo

AU - Blanton, Michael R.

AU - Bershady, Matthew A.

AU - Borissova, Jura

AU - Brandt, William Nielsen

AU - Burgett, William S.

AU - Chambers, Kenneth

AU - Draper, Peter W.

AU - Davenport, James R.A.

AU - Flewelling, Heather

AU - Garnavich, Peter

AU - Hawley, Suzanne L.

AU - Hodapp, Klaus W.

AU - Isler, Jedidah C.

AU - Kaiser, Nick

AU - Kinemuchi, Karen

AU - Kudritzki, Rolf P.

AU - Metcalfe, Nigel

AU - Morgan, Jeffrey S.

AU - Pâris, Isabelle

AU - Parvizi, Mahmoud

AU - Poleski, Radosław

AU - Price, Paul A.

AU - Salvato, Mara

AU - Shanks, Tom

AU - Schlafly, Eddie F.

AU - Schneider, Donald P.

AU - Shen, Yue

AU - Stassun, Keivan

AU - Tonry, John T.

AU - Walter, Fabian

AU - Waters, Chris Z.

PY - 2015/6/20

Y1 - 2015/6/20

N2 - We present the selection algorithm and anticipated results for the Time Domain Spectroscopic Survey (TDSS). TDSS is an Sloan Digital Sky Survey (SDSS)-IV Extended Baryon Oscillation Spectroscopic Survey (eBOSS) subproject that will provide initial identification spectra of approximately 220,000 luminosity-variable objects (variable stars and active galactic nuclei across 7500 deg2 selected from a combination of SDSS and multi-epoch Pan-STARRS1 photometry. TDSS will be the largest spectroscopic survey to explicitly target variable objects, avoiding pre-selection on the basis of colors or detailed modeling of specific variability characteristics. Kernel Density Estimate analysis of our target population performed on SDSS Stripe 82 data suggests our target sample will be 95% pure (meaning 95% of objects we select have genuine luminosity variability of a few magnitudes or more). Our final spectroscopic sample will contain roughly 135,000 quasars and 85,000 stellar variables, approximately 4000 of which will be RR Lyrae stars which may be used as outer Milky Way probes. The variability-selected quasar population has a smoother redshift distribution than a color-selected sample, and variability measurements similar to those we develop here may be used to make more uniform quasar samples in large surveys. The stellar variable targets are distributed fairly uniformly across color space, indicating that TDSS will obtain spectra for a wide variety of stellar variables including pulsating variables, stars with significant chromospheric activity, cataclysmic variables, and eclipsing binaries. TDSS will serve as a pathfinder mission to identify and characterize the multitude of variable objects that will be detected photometrically in even larger variability surveys such as Large Synoptic Survey Telescope.

AB - We present the selection algorithm and anticipated results for the Time Domain Spectroscopic Survey (TDSS). TDSS is an Sloan Digital Sky Survey (SDSS)-IV Extended Baryon Oscillation Spectroscopic Survey (eBOSS) subproject that will provide initial identification spectra of approximately 220,000 luminosity-variable objects (variable stars and active galactic nuclei across 7500 deg2 selected from a combination of SDSS and multi-epoch Pan-STARRS1 photometry. TDSS will be the largest spectroscopic survey to explicitly target variable objects, avoiding pre-selection on the basis of colors or detailed modeling of specific variability characteristics. Kernel Density Estimate analysis of our target population performed on SDSS Stripe 82 data suggests our target sample will be 95% pure (meaning 95% of objects we select have genuine luminosity variability of a few magnitudes or more). Our final spectroscopic sample will contain roughly 135,000 quasars and 85,000 stellar variables, approximately 4000 of which will be RR Lyrae stars which may be used as outer Milky Way probes. The variability-selected quasar population has a smoother redshift distribution than a color-selected sample, and variability measurements similar to those we develop here may be used to make more uniform quasar samples in large surveys. The stellar variable targets are distributed fairly uniformly across color space, indicating that TDSS will obtain spectra for a wide variety of stellar variables including pulsating variables, stars with significant chromospheric activity, cataclysmic variables, and eclipsing binaries. TDSS will serve as a pathfinder mission to identify and characterize the multitude of variable objects that will be detected photometrically in even larger variability surveys such as Large Synoptic Survey Telescope.

KW - quasars: supermassive black holes

KW - stars: variables: general

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THE TIME DOMAIN SPECTROSCOPIC SURVEY: VARIABLE SELECTION and ANTICIPATED RESULTS

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Keywords

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