NGC 6352 / C1721-484
RA: 17:25:29.11  DEC: -48:25:19.8 (J2000)

(Most recent updates: 
Membership probability flag - 2024; Remaining data - January 2025)
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Bytes  Format      Explanation
1-8      A8        Star ID
10-32  A11,1x,A11  Position
34-35    A2        Membership probability flag based on data published
                   by Prudil & Arellano Ferro (2024)
                    m1: prob >=0.85;  m2: prob >=0.7 and <0.85;
                    m3: prob >= 0.5 and <0.7; f: prob <0.5
                    u:  no data available
37-44   F8.4       Period  (days)
46-51   F6.3       Mean magnitude (or maximum magnitude if "max" 
                      is indicated in the remarks column)
53-57   F5.3       Light amplitude (range of variability)
59      A1         Colour for mean magnitude and amplitude
                    e.g.  B, V, R, I, J, K
                    or P (for photographic).
61-65   A5         Type of variable (draft 2006 GCVS classifications)
                      CST denotes non variable stars previously designated
                      as variables
67-80   A19        Notes and Remarks  (f denotes field star)
 
 "--" or "----" indicates no data available
=========================================================================
ID       Position               Mem   Period <mag>  ampl  C Type  Notes/
         RA          Dec        Flag                              Remarks
=========================================================================
1        17:25:52.00 -48:28:09.8 f  ----     15.91  --    V       f
2        17:25:42.31 -48:24:36.0 f  ----     14.57  --    V       f?
3        17:25:00.00 -48:23:10.4 f  ----     16.74  --    V       f
4        17:25:24.73 -48:26:58.0 m1  70.0    13.1   0.6   V SR    mem
5        17:25:37.52 -48:22:10.0 m1 175.0    13.85  0.5   V M     mem
6        17:24:05.52 -48:42:13.1 u   46.24    9.43  0.3   V SR?   f
====================================================================
Supplementary Notes 

The RA and dec listed above are from Samus et al (2009).

CM diagrams by Hartwick & Hesser (1972) and by Fullton et al.  (1995) 
show a red HB and a blue straggler sequence.
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Data for the individual stars

V1-5:    Membership status, magnitudes and amplitudes listed for 
         V1-5 are from Lloyd Evans & Menzies (1977).  All of them are
         red variables.

         For V4-5, periods and variability types are from Whitelock 
         (1986). 

V6 = V0819 Ara in the Moscow GCVS
         The data listed for V6 are from Hesser (1980)
         We conclude this is a field star because of its extreme
         brightness and because the ID chart of Hartwick & Hesser 
         indicates that it is beyond the tidal radius listed in 
         the 2010 update to the Harris (1996) catalogue.

======================================================
Discovery of the variable stars in NGC 6352:

   V1-3 = FL 1, 4, 8 
     Fourcade et al. (1966) with x,y positions and an ID chart
     
     Sawyer Hogg in her 3rd catalog assigned the numbers V1-3 and
     stated that the remaining 9 variables announced by Fourcade et 
     al: FL2, FL3, FL5-7, and FL9-12 are considered to be field stars.

     Since the Fourcade catalogue is not available in many libraries 
     and has not been digitized, many of the stars listed in their 
     catalogue will soon become lost to the literature on globular 
     cluster variable stars.  For this reason, Layden et al. (2025) 
     published the RA and dec (J2000) for these 9 "field" variables
     in NGC 6352.  They derived their coordinates by matching the 
     stars in Fourcade's charts with modern digital images.  In their 
     paper, Layden et al. also listed a Gaia Source ID for each star.


   V4-5 
     Lloyd Evans & Menzies (1973) 
       V4=HH113 of Hartwick & Hesser (1972) 
       V5=L36 identified in chart by Lloyd Evans & Menzies (1977)
     The number V4 was assigned by Sawyer Hogg (1973).  At that time,
     L36 was considered to be a field star, but after Lloyd Evans &
     Menzies (1977) classified it as a probable member, it was assigned
     the number V5 in our electronic catalogue (Clement et al. 2001).

   V6 = star E of Hartwick & Hesser, ApJ 175, 77 (1972)
      with variability announced by Hesser (1980, IBVS 1758)
      The number V6 was assigned in our electronic catalogue (Clement et
      al. 2001).
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References

Clement, C. M., Muzzin, A., Dufton, Q., Ponnampalam, T., Wang, J.,
Burford, J., Richardson, A., Rosebery, T. 2001, AJ, 122, 2587

Fourcade, C. R., Laborde, J. R., Albarracin, J. 1966, Atlas y Catalogue
de Estrellas Variables en Cumulos Globulares al sur de -29 degrees, Cordoba

Fullton, L. K., Carney, B. W., Olszewski, E. W., Zinn, R., Demarque, P.,
Janes, K. A., Da Costa, G. S., Seitzer, P. 1995, AJ, 110, 652

Harris, W. E. 1996, AJ, 112, 1487

Hartwick. F. D. A. & Hesser, J. E. 1972, ApJ, 175, 77 

Hesser, J. E. 1980, IBVS,  1758

Layden, A. C., Revangelista, J., Gupta, S., Mittameda, M., Mulloy, E.,
Muslim, S. I., Olushola-Alao, T., Rishi, A. 2025, Astron. Nachr., 346,
(in press)

Lloyd Evans, T. & Menzies, J. W. 1973, in IAU Colloq. No. 21, Variable  
Stars in Globular Clusters and in Related Systems, 151

Lloyd Evans, T. & Menzies, J. W. 1977, MNRAS, 178, 163

Prudil Z., Arellano Ferro, A. 2024, MNRAS, 534, 3654

Samus, N. N., Kazarovets, E. V., Pastukhova, E. N., Tsvetkova, T. M.,
Durlevich, O. V. 2009, PASP, 121, 1378

Sawyer Hogg, H. 1973,  Publ. DDO, 3, No.  6

Whitelock, P. A. 1986, MNRAS, 219, 525 
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