Refereed Publications by Andy Layden

NB: Papers numbered in red are my more significant contributions to the field.

46) Caddy, R.V., Layden, A.C., Reichart, D.E., Haislip, J.B., Kouprianov, V.V., Ivarsen, K.M., Moore, J.P., LaCluyze, A.P., Linder, T.M. & Nysewander, M.C. 2022, PASP, 134, 094201, Optical Time-Series Photometry of the Symbiotic Nova V1835 Aquilae. 

• File containing supplemental data [caddy.tar.gz, 14 Mb].
• ArXiv version of article including online Supplement in same document as the main article.

-- Layden, A., Osborn, W., Pritzl, B.J., & Smith, H.A. 2020, RNAAS, 4, 2, Improved Observational Data for V54, A Recently Discovered RR Lyrae Star in M13 [Not peer-reviewed]. 

45) Zinn, R., Chen, X., Layden, A.C., & Casetti-Dinescu, D.I. 2020, MNRAS, 492, 2161-2176, Local RR Lyrae stars: native and alien. 

44) Fabrizio, M., Bono, G., Braga, V.F., ... , Layden, A., ... (24 authors), 2019, ApJ, 882, 169 On the use of field RR Lyrae as Galactic probes: I. The Oosterhoff dichotomy based on fundamental variables.

43) Layden, A., Tiede, G.P., Chaboyer, B., Bunner, C., & Smitka, M., 2019, AJ, 158, 105 (23pp), Infrared K-band Photometry of Field RR Lyrae Variable Stars. 

• File containing supplemental data [lcs.tar.gz, 631 kb].

42) Osborn, W., Kopacki, G., Smith, H., Layden, A., Pritzl, B., Keuhn, C., & Anderson, M., 2019, Acta Astronomica, 69, 101-133, Variable Stars in M13. III. The Cepheid Variables and their Relation to Evolutionary Changes in Metal-poor BL Her Stars.

41) Lahey, A., Dimick, D. & Layden, A. 2017, JAAVSO, 45, 202-208, Improving the Photometric Calibration of the Enigmatic Star KIC 8462852 

• File containing supplemental data [kic_www.tar.gz, 0.9 Mb].

40) Osborn, W., Layden, A., Kopacki, G., Smith, H., Anderson, M., Kelley, A., McBride, K., & Pritzl, B., 2017, Acta Astronomica, 67, 131-158, Variable Stars in M13. II. The Red Variables and the Globular Cluster Period-Luminosity Relation

• File containing supplemental data [m13_lpv.tar.gz, 17 Mb], Clement catalogue entry.

39) Abbas, M., Layden, A., Guldenschuh, K., Reichart, D. Ivarsen, K. Haislip, J., Nysewander, M., LaCluyze, A. & Welch, D. 2015, AJ, 149, 40, Variable Stars in Metal-Rich Globular Clusters. IV. Long Period Variables in NGC 6496 (arXiv: 1410.3305)

• File containing supplemental data [n6496.tar.gz, 22 Mb], article [n6496.ps, 805 kb] Clement catalogue entry.

38) Kunder, A., Stetson, P.B., Cassisi, S., Layden, A., Bono, G., Catelan, M., Walker, A.R., et al. 2013, AJ, 146, 119, The RR Lyrae Variables and Horizontal Branch of NGC 6656 (M22)

• File containing light curve data files [m22data.tar.gz, 116 kb] Clement catalogue entry.

37) Wehrung, M., Layden, A., Rogel, A., Reichart, D., Ivarsen, K., Haislip, J., Nysewander, M., LaCluyze, A., 2013, IBVS, 6071, 1, Time-Series Photometry of the Symbiotic Nova NSV 11749 and New Variable Stars in Aquila

• File containing data files, FITS images corresponding to (x,y) coordinates, and supplemental plots [wehrung.tar.gz, 14 Mb]

36) Nemec, Smolec, Benko, Moskalik, Kolenberg, Szabo, Kurtz, Bryson, Guggenberger, Chadid, Jeon, Kunder, Layden, Kinemuchi, Kiss, Poretti, Christiansen-Dalsgaard, Kjeldsen, Caldwell, Ripepo, Derekas, Nuspl, Mullally, Thompson & Burucki, 2011, MNRAS, 417, 1022-1053, Fourier analysis of non-Blazhko ab-type RR Lyrae stars observed with the Kepler space telescope

35) Layden, A. Broderick, A, Pohl, B, Reichart, D. et al., 2010, PASP, 122, 1000-7, Searching for Long-Period Variables in Globular Clusters: A Demonstration on NGC 1851 using PROMPT

• File containing the complete text along with supplemental plots, data files, and FITS images of the cluster with corresponding coordinates [tar.gz, 6.4 Mb] Clement catalogue entry.

34) Kunder, A., Chaboyer, B. & Layden, A.C. 2010, AJ, 139, 415-424, The Determination of Reddening from Intrinsic VR Colors of RR Lyrae Stars

33) Harris, W. E., Harris, G. L. H., Layden, A. C. & Wehner, E. M. H., 2007, ApJ, 666, 903-918, The Leo Elliptical NGC 3379: A Metal-Poor Halo Emerges

32) Harris, W. E., Harris, G. L. H., Layden, A. C., & Stetson, P. B., 2007, AJ, 134, 43-55, Hubble Space Telescope Photometry for the Halo Stars in the Leo Elliptical NGC 3377

31) Baker, J.M., Layden, A.C., Welch, D.L., & Webb, T.M.A., 2007, AJ, 133, 139, Variable Stars in Metal-Rich Globular Clusters. III. NGC 6539.

• File containing plots, data files, and a FITS image of the cluster with corresponding coordinates [tar.gz, 11.4 Mb]. Clement catalogue entry.

30) Catelan, M. Stetson, P.B., Pritzl, B.J., Smith, H.A., Kinemuchi, K., Layden, A.C., Sweigart, A.V. & Rich, R.M. 2006, ApJL, 651, L133-136, Deep HST Photometry of NGC 6388: Age and Horizontal-Branch Luminosity. 

29) Layden, Andrew C., Sarajedini, Ata., von Hippel, Ted, & Cool, Adrienne M., 2005, ApJ, 632, 266, Deep Photometry of the Globular Cluster M5: Distance Estimates from White Dwarf and Main Sequence Stars.

• Photometry data from Table 2 [ascii, 0.8 Mb].
• File containing photometry data and FITS images with corresponding coordinates [tar.gz, 6.7 Mb].

28) Guldenschuh, K., Layden, A., Whiting, A., et al. 2005, PASP, 117, 721, The Intrinsic Colors of RR Lyrae Variables: A Means to Determine Interstellar Reddening.

• Preprint (postscript, 311 kb) and time series data (Table 2, ascii, 13 kb).

27) Pritzl, B.J., Smith, H.A., Stetson, P.B., Catelan, M., Sweigart, A.V., Layden, A.C., & Rich, R.M. 2003, AJ, 126, 1381, Hubble Space Telescope Snapshot Study of Variable Stars in Globular Clusters: The Inner Region of NGC 6441

26) Layden, A.C., Bowes, B.T., Welch, D.L., & Webb, T.M.A., 2003, AJ, 126, 255, Variable Stars in Metal-Rich Globular Clusters: II. NGC 6316.

• File containing data files and a FITS image of the cluster with corresponding coordinates [tar.gz, 4 Mb]. Clement catalogue entry.

25) Layden, Andrew C. & Sarajedini, A. 2003, AJ, 125, 208-223, Photometry of the Globular Cluster NGC 3201 and its Variable Stars. 

• File containing data files, FITS image with corresponding corrdinates, and an individual light curve for each RRL (eps). [tar.gz, 2.7 Mb]. Clement catalogue entry.

24) Day, A., Layden, A., Hoard, D., et al. 2002, PASP, 114, 645-649, Light and Color Curves of Six Field RR Lyrae Variable Stars.

23) Hoard, D., Layden, A., Buss, J., Demarco, R., Greene, J., Kim-Quijano, J., & Soderberg, A. 2001, PASP, 113, 82-85, The Distance to the RR Lyrae Star V716 Monocerotis. Data available.

22) Melbourne, J., Sarajedini, A., Layden, A., and Martins, D.H. 2000, AJ, 120, 3127-3138, CCD Photometry of the Globular Cluster NGC 4833 and Extinction Near the Galactic Plane.

21) Layden, Andrew C. & Sarajedini, Ata 2000, AJ, 119, 1760, Photometry of the Globular Cluster M54 and the Sagittarius Dwaft Galaxy: the Age-Metallicity Relation.

• Entire preprint (1 tar file containing gzipped files, including complete data tables, 2.6 Mb).
• A gzipped tar file containing complete photometry (Tables 2-6 and 12, and the combined photometry in Figs. 5a and 5b). 
• A tar file containing gzipped fits images of the M54 and Sgr fields, whose coordinates correspond to the XY values quoted in the text (4.9 Mb).
• Light curve templates (ascii, 6 Kb).

20) Wilhelm, R., Beers, T. C., Sommer-Larsen, J., Pier, J. R., Layden, A. C., Flynn, C., Rossi, S., Christensen, P. R. 1999, AJ, 117, 2329, Spectroscopy of Hot Stars in the Galactic Halo. III. Analysis of a Large Sample of Field Horizontal-Branch and Other A-Type Stars.

19) Layden, A.C., Ritter, L.A., Welch, D.L., & Webb, T.M.A. 1999, AJ, 117, 1313, The Variable Stars and Blue Horizontal Branch of the Metal-Rich Globular Cluster NGC 6441.

• A gzipped fits image of the cluster, (coordinates correspond to XY values quoted in text).
• FIGURE 1: A large-scale Image of the cluster (JPEG, 198kb).
• TABLE 1: Photometry of 32,268 Stars Toward NGC 6441 (all mags, all errors, R<1100pix; ASCII table; 1.6Mb).
• TABLE 6: Time Series Photometry of Variable Stars (ASCII, 60kb). Clement catalogue entry.

18) Layden, A.C. "Absolute Magnitudes Derived Using the Statistical Parallax Method", an invited review in "Post-Hipparcos Cosmic Candles", 1999, eds. A. Heck & F. Caputo, (Kluwer: Dordrecht).

• Postscript file (183kb), or gzipped PostScript file (67kb).

17) Lira, P., ... Layden, A.C., ... 1998, AJ, 115, 234, Optical Light Curves of the Type Ia Supernovae 1990N and 1991T.

16) Layden, A.C. 1998, AJ, 115, 193, RR Lyrae Variables in the Inner Halo. I. Photometry. Complete versions of Table 1 Individual Photometric Observations (ascii file, 38kb); Table 3 Six Light Curve Templates (ascii file, 2kb); and Table 4 Derived Light Curve Parameters (ascii file, 9kb).

15) Pesce, J., ... Layden, A.C., ... 1997, ApJ, 486, 770, Multiwavelength Monitoring of the BL Lacertae Object PKS 2155-304 in 1994 May. I. The Ground-based Campaign.

14) Layden, A.C. & Sarajedini, A. 1997, ApJ, 486, L107, The Globular Cluster M54 and the Star Formation History of the Sagittarius Dwarf Galaxy.

13) Layden, A.C. & Wachter, S. 1997, PASP, 110, 977, CG Muscae: A Cataclysmic Mis-Classification. ASCII data file containing all the photometric data from Table 2 (13kb).

12) Layden, A.C. 1997, PASP, 109, 524, Light Curves of 40 Field RR Lyare Variables. ASCII data file containing ALL the photometric data from Table 2 (105kb).

11) Sarajedini, A. & Layden, A.C., 1997, AJ, 113, 264, Reddenings, Metallicities, and Possible Abundance Anomalies in Young Globular Clusters.

10) Hamuy, M., ..., Layden, A.C., ... 1996, AJ, 112, 2048, BVRI Light Curves for 29 Type Ia Supernovae.

9) Layden, A.C., Hanson, R.B., Hawley, S.L., Klemola, A.R., & Hanley, C.J. 1996, AJ, 112, 2110, The Absolute Magnitude and Kinematics of RR Lyrae Stars via Statistical Parallax, basic data from Table 2 (19kb).

8) Rosen, S.R., Mittaz, J.P.D., Buckley, D.A., Layden, A.C., Clayton, K.L., McCain, C., Osborne, J.P., Watson, M.G., \& Wynn, G. 1996, MNRAS, 280, 1121, "Accretion Mode Changes in QS Tel (RE1938-461): EUVE, ROSAT and Optical Observations."

7) Layden, A.C. 1995, AJ, 110, 2312, The Metallicities and Kinematics of RR Lyrae Variables. III. On the Production of Metal-Rich RR Lyrae Stars.

6) Layden, A.C. 1995, AJ, 110, 2288, The Metallicities and Kinematics of RR Lyrae Variables. II. Galactic Structure and Formation from Local Stars, data from Table 1, Proper Motions and Space Velocities of 153 RR Lyrae.

5) Bailyn, ... Layden, ... 1995, Nature, 374, 701-703, "The Optical Counterpart of the Superluminal Source GRO J1655-40."

4) Sarajedini, A. & Layden, A.C. 1995, AJ, 109, 1086, A Photometric Study of the Globular Cluster M54 and the Sagittarius Dwarf Galaxy: Evidence for Three Distinct Populations.

3) Layden, A.C. 1994, AJ, 108, 1016, The Metallicities and Kinematics of RR Lyrae Variables. I. New Observations of Local Stars.

• Mother of all tables: data derived from individual spectra used in Layden (1994) (ASCII data, 133 kb). Here is a brief key describing the contents of this whopping table.
• Table 1 of Layden (1994): "Abundances and Velocities from the Literature" (ASCII data, 18 kb).
• Table 9 of Layden (1994): "New Data (Abundances and Velocities) for Local RR Lyrae Variables" (ASCII data, 26 kb).

2) Layden, A.C., Fox, P.A., Howard, J.M., Sarajedini, A., Schatten, K.H. & Sofia, S. 1990, Solar Physics, 132, 1-40, "Dynamo-Based Scheme for Forecasting the Magnitude of Solar Activity Cycles."

1) Herbst, W. & Layden, A.C. 1987, AJ, 94, 150-157, H-alpha Photometry of Dwarf K and M Stars. 

Updated 2015mar19 -- ACL