NGC 5024 (Messier 53) C1310+184 R.A. 13 10.5, Dec +18 26' (1950) Periods and magnitudes for V1-47 from Goranskij, VS Supp 3 (1976) Periods for V48-50 from Cuffey, AJ 71 p.514 (1966) Revised positions and periods for V6-11, V18, V19, V23-25, V29, V32, V33, V37, V40-44 as well as all elements of V51-70 from Kopacki, A&A 358 p.547 (2000) Amplitudes for V51-64 were estimated from the light curves in Kopacki, A&A 358 p.547 (2000). They are considered approximate because the photometry was derived from image subtraction and is not on a regular magnitude system. Sohn et al., (2001) will have observations of 44 RR Lyrae Sohn, S., et al., AAS 198 #46.02 (2001) No. x" y" Max. Min. Epoch Period Remarks 1 + 9.6 -171.0 16.30 17.51 41393.431 0.6098313 RR0 2 - 78.0 -183.6 16.80 17.40 41801.477 0.3861821 RR1 3 - 60.6 -138.0 16.45 17.75 33748.683 0.6306156 RR0 4 -169.5 -156.6 16.85 17.40 39974.408 0.3856380 RR1 5 -237.0 -258.0 16.32 17.70 41070.238 0.6394228 RR0 6 +122.1 + 13.9 16.45 17.50 39974.690 0.6640142 RR0 7 + 79.9 + 85.1 16.15 17.55 41801.359 0.5448460 RR0 8 + 73.2 + 60.1 16.45 17.50 39260.611 0.6155072 RR0 9 + 66.1 - 40.2 16.07 17.38 41393.523 0.6003482 RR0 10 -137.7 + 54.7 16.32 17.60 41801.738 0.6082530 RR0 11 -144.9 - 59.4 16.40 17.45 41393.618 0.6299424 RR0 12 +409.5 +187.5 16.15 17.70 40294.618 0.6125904 RR0 13 +462.0 -299.7 16.08 17.65 40294.556 0.6274482 RR0 14 +354.6 -207.0 16.25 17.70 40705.482 0.5453423 RR0 15 +248.4 +228.0 16.78 17.25 41801.627 0.3087293 RR1 16 -136.5 -202.5 16.85 17.38 41393.151 0.3031674 RR1 17 -214.5 +114.0 16.75 17.25 41413.274 0.3811170 RR1 18 - 96.3 + 11.2 15.83 16.42 0.33611 RR1 19 +164.9 - 40.8 16.62 17.25 41391.561 0.3909871 RR1 20 +188.4 -351.6 16.85 17.50 41393.802 0.384186 RR1 21 +437.4 - 27.0 16.84 17.48 41801.943 0.3385265 RR1 22 - 53.4 -288.0 17.43 not var 23 + 97.5 - 90.1 16.75 17.40 41801.389 0.36579 RR1 24 -117.1 - 29.2 16.9 17.5 40294.690 0.7631901 RR0 25 +129.8 + 31.1 16.70 17.30 39260.156 0.7051473 RR0 26 -288.0 -279.9 16.73 17.30 41801.616 0.3911442 RR1 27 -203.8 -157.9 16.35 17.45 40294.303 0.6710617 RR0 28 -181.4 +459.0 16.21 17.65 39974.096 0.6327959 RR0 29 +125.3 - 79.6 16.90 17.40 40705.680 0.8232550 RR0 30 + 57.7 -482.8 16.25 17.60 41393.604 0.5354634 RR0, Bl: 37d 31 + 59.6 - 0.1 16.70 17.05 42048.747 0.70572 RR0 32 -111.7 - 86.3 16.63 17.15 41413.344 0.39041 RR1 33 -165.5 + 12.5 16.35 17.75 42048.848 0.624585 RR0 34 -144.0 -216.7 16.48 16.70 not var 35 +104.1 +153.2 16.95 17.35 41801.768 0.3726709 RR1 36 +120.3 +306.5 16.90 17.30 40294.455 0.3732012: RR1 37 - 43.5 + 62.7 16.30 17.27 42048.477 0.717611 RR0 38 + 21.3 -143.2 16.45 17.40 41393.307 0.7057836 RR0 39 -234.0 +212.5 17.56 not var 40 + 8.8 +111.5 16.87 17.20 41801.238 0.3146633 RR2? 41 + 20.7 + 64.7 16.30 16.95 42048.515 0.61455 RR0 42 - 69.2 + 17.7 16.30 17.30 42048.282 0.713694 RR0 43 - 32.2 + 52.6 0.71205 RR0 44 + 53.6 - 2.1 15.20 15.99 0.27276 RR1 45 - 4.3 - 36.5 16.30 17.40 42048.587 0.654966 RR0 46 - 11.8 + 33.7 0.70363 RR0 47 - 68.7 +138.0 16.60 17.0 37763.435 0.35047 RR1 48 + 4.68 + 11.58 16.63 17.53 0.33277660 RR1 49 + 1.05 + 4.39 15.25 15.65 111.6 LPV 50 -139.9 - 88.4 15.22 15.52 55.4 LPV Vamp 51 + 31.7 + 44.7 ~0.38 0.35519 RR1 52 + 7.7 + 33.1 ~0.62 0.37414 RR1 53 + 6.6 + 31.6 ~0.58 0.38910 RR1 54 - 15.2 + 28.3 ~0.44 0.31512 RR1 55 - 27.4 + 33.5 ~0.57 0.30677 RR1 56 - 25.4 - 37.5 ~0.44 0.32895 RR1 57 + 2.0 - 5.6 ~1.03 0.56831 RR0 58 + 2.1 - 33.0 ~0.49 0.35499 RR1 59 + 17.0 - 43.8 ~0.32 0.30393 RR2? 60 + 22.1 - 27.9 ~1.09 0.64475 RR0 61 - 2.5 + 6.9 ~0.52 0.37951 RR1 62 - 19.6 + 26.4 ~0.44 0.35992 RR1 63 + 12.9 - 3.5 ~0.44 0.31044 RR1 64 - 41.0 + 9.6 ~0.51 0.31955 RR1 65 +133.9 + 53.3 red 66 + 88.5 - 1.6 red 67 + 80.7 + 4.2 red 68 + 14.6 -101.6 red 69 + 11.3 + 15.4 red 70 - 1.8 - 21.9 red Margoni Asiago Contr 150 (1964) Margoni Asiago Contr 170 (1965) Margoni Asiago Contr 198 (1967) Goranskij, AC 767 p.6 (1973), period of var.24 Goranskij, AC 832 p.7 (1974), per. of var.31,33,37,41,42, and 45 Zinn, ApJ 193 p.593 (1974), UV-bright stars and their evolutionary status Butler, ApJ 200 p.68 (1975), metal abundances of RR Lyrae variables Goranskij, VS Supp 2 p.323 (1976), Blazhko period of V30 = 37.61d Goranskij, VS Supp 3 p.1 (1976), revised periods and changes of RR Lyraes Caputo et al., A&A 123 p.141 (1983), values of He-dependent A for RR Lyraes Frogel, ApJ 272 p.167 (1983), red variables in globular clusters Frogel et al., ApJ Supp 53 p.713 (1983), IR photometry of giant stars Harris et al., PASP 95 p.256 (1983), UV-bright stars, composite CMD Kadla & Gerashchenko, Izv Glav Astron Obs 202 p.83 (1984), cluster properties Whitelock, MN 219 p.525 (1986), study of cool variables Anderson et al IAUCirc 4853 (1989) 33 millisecond pulsar Castellani & Quarta, A&AS 71, 1 (1987), RR Lyrae periods vs. metallicity Sanduleak ApJS 71, 713(1989)objective prism survey for outlying HB stars (chart) Ray & Kluzniak, Accretion powered Compact Bin, 457 (1990) origin of GC pulsars Kulkarni et al, ApJ 356 174(1990)search for pulsar content in globular clusters Lee, ApJ 350 155(1990) HB stars & period shifts Romani, ApJ 357 493(1990)LMXB & LMBP studies Sandage, ApJ 350 631(1990) Oosterhoff period effect Raffelt, ApJ 365 559(1990) RR Lyrae mag compared with red giant tip Ray & Kluzniak, Nature 344 415(1990) genesis of pulsars in GCs Lee, ApJ 363 159(1990) RR Lyrae period shifts vs [Fe/H] Heasley & Christian, AJ101, 967 (1991) CCD photometry with B,V C-M diagram Deich et al. 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