NGC 6316 / C1713-280
RA: 17:16:37.30 DEC: -28:08:24.4  (J2000)

(Most recent updates: 
Membership probability flag - 2024; Remaining data - June 2013)
============================================================
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        17:16:42.57 -28:09:41.6 m1 ----     15.69  --    V L?     
2        17:16:39.58 -28:08:22.5 m1 ----     15.68  --    V L?     
3        17:16:36.66 -28:09:06.2 m1 ----     15.73  --    V L?     
4        17:16:35.63 -28:07:39.8 m1 ----     16.36  --    V L?     
5        17:16:37.71 -28:08:03.9 m1 ----     16.48  --    V L?     
6        17:16:33.08 -28:07:59.7 m1 ----     15.87  --    V ?     
7        17:16:53.43 -28:13:27.4 u  ----     16.49  --    V L?    f? 
8        17:16:48.82 -28:04:56.1 u  ----     17.13  --    V L?    f? 
9        17:16:38.53 -28:08:35.7 m1 ----     15.58  --    V L?     
10       17:16:34.14 -28:06:30.1 f  ----     17.15  --    V L?    f?  
11       17:16:10.85 -28:08:29.9 u  ----     17.17  --    V L?    f? 
12       17:16:50.34 -28:03:19.4 u  ----     17.85  --    V E?    f?
13       17:16:39.58 -28:10:44.0 f  ----     19.05  --    V ?     f?
14       17:16:28.07 -28:03:18.2 u    0.3969 15.05  0.24  V EW?   f;Note
15       17:16:55.69 -28:14:52.3 u    0.5602 17.13  0.71  V RR0   f;Note
16       17:17:05.07 -28:09:02.9 u    0.2725 17.19  0.47  V RR1   
17       17:16:25.64 -28:09:04.3 f    0.4883 17.37  0.84  V RR0   altP=0.9769   
18       17:16:25.46 -28:14:02.6 u    0.5822 17.48  1.06  V RR0   f;Note
19       17:16:43.89 -28:08:23.6 f    0.4225 17.82  0.29  V EW?   f;Note

PSR      -- -- --     -- -- --   u  ----     --     --            1 msP

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Supplementary Notes 

The periods, magnitudes, amplitudes, classifications, and membership
status are from the discovery paper by Layden et al. (2003).

The RA and dec for the four variables V14, V15, V18, V19 are from the GCVS  
where they are listed as V2719 Oph, V2721 Oph, V2718 Oph and V2720 Oph 
respectively.

For the remaining variables, the RA and dec are from matches
with 2MASS sources.  Initially, provisional values were calculated from 
relationships derived by Layden et al. (2003): 
Delta RA = -0.396*(X_pix - 1059); Delta dec = -0.396*(Y_pix - 993).
For these calculations, the cluster centre was assumed to be 17:16:37.3,
-28:08:24.4, the value published in the 2010 version of the Harris (1996) 
catalogue. The provisional coordinates and the 2MASS coordinates 
agreed to within 1 arcsec for all the variables except V11 for which the
difference was 3 arcsec.
=====================================================================
Discovery of the variable stars in NGC 6316

  V1-19 
    Layden et al. (2003) with pixel numbers

  PSR:  According to Paulo Freire's website at the Max Planck 
        Institute in Bonn (July 2024 version), there is
        1 millisecond pulsar in NGC 6316.

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References

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

Layden, A. C., Bowes, B. T., Welch, D. L., Webb, T. M. A. 2003, AJ, 
126, 255 

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

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