\begin{table}%t5
\caption{\label{t5}Line identification in the optical spectrum of V645~Cyg.}
\par
\small%\centering
\par
\begin{tabular}{crrrlclcrrrlcl}
\hline\hline
$\lambda$& $EW$    & $I/I_{\rm c}$& $V_{\rm r}$& ID      & {\it FWHM}  & Comment &$\lambda$& $EW$    & $I/I_{\rm c}$& $V_{\rm r}$& ID      & {\it FWHM}  & Comment \\
\hline
 4320.97 & 0.36 & 1.33 &$-$62.5& Ti II  (41)&  1.02 &  n               & 5657.92 &  0.69 & 1.32 &$-$38.2& Fe II (57)&  2.14 &  b        \\
 4330.26 & 0.00 & 1.33 &$-$47.8& Ti II  (94)&  0.00 &  n, b w/H$\gamma$& 5662.94 &  0.28 & 1.14 &$-$47.7& Fe  I (924)& 1.84 &  ID:      \\
 4340.47 & 3.20 & 0.30 &$-$313.1& H   I  (1)&  5.31 &  P Cyg          & 5667.16 &  0.00 & 1.11 &$-$33.9& Sc II  (29)& 0.00 &  +f       \\
 4340.47 & 7.18 & 3.08 &$-$12.5&  H   I  (1)&  4.12 &                 & 5669.03 &  0.42 & 1.15 &$-$48.7& Sc II  (29)& 0.00 &           \\
 4351.76 & 2.18 & 1.86 &$-$45.5& Fe II  (27)&  2.58 &                  & 5684.19 &  0.22 & 1.14 &$-$42.8& Sc II  (29)& 1.59 &           \\
 4374.83 & 0.00 & 1.88 &$-$40.4& Ti II  (93)&  0.00 &  b               & 5780.41 &  0.63 & 0.74 &$-$27.0& DIB        & 2.32 &           \\
 4385.38 & 3.60 & 2.10 &$-$52.7& Fe II  (27)&  3.45 &  n, b:           & 5796.03 &  0.20 & 0.84 &$-$28.5& DIB        & 1.16 &           \\
 4395.03 & 1.74 & 1.76 &$-$34.1& Ti II  (19)&  2.13 &                  & 5889.95 &  0.00 & 0.11 &$-$58.1& Na  I  (11)& 0.00 &           \\
 4399.86 & 1.32 & 1.70 &$-$40.9& Fe II  (20)&  2.17 &                  & 5889.95 &  0.00 & 0.00 &$-$35.7& Na  I  (11)& 0.00 &           \\
 4416.82 & 1.78 & 1.59 &    0.7& Fe II  (27)&  3.09 &  b:              & 5889.95 &  0.00 & 0.00 &$-$10.2& Na  I  (11)& 0.00 &           \\
 4421.95 & 0.30 & 1.20 &$-$23.8& Ti II  (93)&  1.61 &                  & 5895.92 &  0.00 & 0.17 &$-$57.5& Na  I  (11)& 0.00 &           \\
 4443.80 & 1.51 & 1.57 &$-$37.8& Ti II  (19)&  2.50 &                  & 5895.92 &  0.00 & 0.00 &$-$36.6& Na  I  (11)& 0.00 &           \\
 4489.19 & 0.00 & 1.66 &$-$44.8& Fe II  (37)&  0.00 &  +f              & 5895.92 &  0.00 & 0.09 &$-$12.7& Na  I  (11)& 0.00 &           \\
 4491.40 & 3.48 & 1.88 &$-$57.4& Fe II  (37)&  4.84 &                  & 5991.38 &  0.90 & 1.41 &$-$42.6& Fe II  (46)& 2.16 &           \\
 4501.27 & 0.64 & 1.42 &$-$54.6& Ti II  (31)&  1.43 &  P Cyg:          & 6084.11 &  0.45 & 1.21 &$-$44.9& Fe II  (46)& 2.15 &           \\
 4508.28 & 1.14 & 1.68 &$-$47.2& Fe II  (38)&  1.71 &  P Cyg           & 6102.72 &  0.05 & 1.03 &$-$23.6& Ca  I  (3)& 1.50 &           \\
 4515.34 & 0.60 & 1.44 &$-$48.5& Fe II  (37)&  1.37 &  P Cyg           & 6113.33 &  0.00 & 1.05 &$-$63.3& Fe II  (46)& 0.00 &  +f       \\
 4520.23 & 0.00 & 1.34 &$-$37.2& Fe II  (37)&  0.00 &  +f              & 6114.60 &  0.00 & 1.05 &$-$36.8& N  II  (7)& 0.00 &           \\
 4522.63 & 1.88 & 1.67 &$-$50.4& Fe II  (38)&  3.41 &                  & 6122.22 &  0.09 & 1.05 &$-$49.0& Ca  I  (3)& 1.65 &           \\
 4534.16 & 1.15 & 1.54 &$-$50.9& Fe II  (37)&  1.34 &  P Cyg:          & 6129.71 &  0.09 & 1.05 &$-$52.4& Fe II  (46)& 1.88 &           \\
 4549.47 & 1.80 & 1.90 &$-$38.9& Fe II  (38)&  1.95 &  P Cyg           & 6141.72 &  0.16 & 1.12 &$-$45.9& Ba II  (2)& 1.56 &           \\
 4555.89 & 1.17 & 1.50 &$-$77.7& Fe II  (37)&  2.23 &  b:              & 6147.73 &  1.93 & 1.54 & $-$2.9& Fe II  (74)& 3.28 &  b:       \\
 4558.58 & 0.54 & 1.41 &$-$43.4& Fe II  (20)&  1.16 &                  & 6191.56 &  0.33 & 1.18 &$-$41.2& Fe  I (169)& 1.79 &           \\
 4563.76 & 0.82 & 1.51 &$-$40.1& Ti II  (50)&  1.51 &  P Cyg:          & 6195.00 &  0.06 & 0.95 &$-$14.5& DIB        & 0.84 &           \\
 4571.97 & 0.94 & 1.55 &$-$42.0& Ti II  (82)&  1.64 &  P Cyg           & 6219.54 &  0.14 & 1.06 &$-$47.3& Fe II  (34)& 2.50 &           \\
 4576.33 & 0.26 & 1.30 &$-$48.5& Fe II  (38)&  0.77 &                  & 6238.38 &  1.35 & 1.46 &$-$32.2& Fe II  (74)& 2.83 &           \\
 4583.82 & 1.90 & 1.95 &$-$46.5& Fe II  (38)&  1.91 &  P Cyg           & 6247.56 &  2.04 & 1.72 &$-$48.5& Fe II  (74)& 2.92 &           \\
 4588.21 & 0.00 & 1.47 &$-$26.8& Cr II  (44)&  0.00 &  +2f             & 6252.56 &  0.11 & 1.05 &$-$31.2& Fe  I (169)& 2.02 &           \\
 4589.89 & 0.00 & 1.47 &$-$56.9& Cr II  (44)&  0.00 &                  & 6300.23 &  0.00 & 1.73 &$-$394.7& O  I  (1)& 0.00 &           \\
 4592.09 & 2.15 & 1.29 &$-$50.3& Cr II  (44)&  0.00 &                  & 6300.23 &  0.00 & 1.77 &$-$62.4& O   I  (1)& 0.00 &           \\
 4618.83 & 0.00 & 1.43 &$-$39.6& Cr II  (44)&  0.00 &  +f              & 6318.11 &  0.25 & 1.11 &$-$52.2& Ca  I  (53)& 2.13 &           \\
 4620.51 & 0.00 & 1.40 &$-$48.7& Fe II  (38)&  0.00 &                  & 6363.88 &  0.00 & 1.31 &$-$402.6& O  I  (1)& 0.00 &           \\
 4629.34 & 1.41 & 1.78 &$-$46.6& Fe II  (38)&  1.84 &  P Cyg           & 6363.88 &  0.00 & 1.26 &$-$72.6& O   I  (1)& 0.00 &           \\
 4634.11 & 1.17 & 1.45 &$-$40.8& Cr II  (44)&  2.73 &  P Cyg +p        & 6369.45 &  0.36 & 1.16 &$-$34.4& Fe II  (40)& 2.26 &  P Cyg    \\
 4648.23 & 0.00 & 1.10 &$-$43.9& Fe II  (38)&  0.00 &  n               & 6379.00 &  0.06 & 0.94 &$-$17.9& DIB        & 0.75 &           \\
 4656.97 & 0.45 & 1.22 &$-$44.5& Fe II  (43)&  1.88 &  n, P Cyg        & 6393.61 &  0.18 & 1.10 &$-$36.6& Fe  I (168)& 1.70 &           \\
 4666.75 & 0.40 & 1.25 &$-$39.2& Fe II  (37)&  1.40 &                  & 6400.01 &  0.13 & 1.05 &$-$42.2& Fe  I (816)& 2.41 &           \\
 4670.17 & 0.41 & 1.28 &$-$27.6& Fe II  (25)&  1.34 &                  & 6407.30 &  0.17 & 1.06 &$-$47.3& Fe II  (74)& 2.73 &  b:       \\
 4708.90 & 0.34 & 1.16 &$-$51.6& Ba II  (15)&  1.96 &                  & 6416.91 &  0.92 & 1.37 &$-$41.6& Fe II  (74)& 2.39 &  b:       \\
 4731.44 & 0.77 & 1.45 &$-$49.4& Fe II  (43)&  1.75 &                  & 6432.65 &  1.80 & 1.71 &$-$43.8& Fe II  (40)& 2.59 &           \\
 4764.54 & 0.73 & 1.36 &$-$72.4& Ti II  (48)&  2.10 &  b               & 6456.38 &  0.43 & 0.93 &$-$328.5&Fe II  (74)& 5.62 &           \\
 4779.99 & 0.56 & 1.33 &$-$41.4& Ti II  (92)&  1.85 &                  & 6456.38 &  2.19 & 1.83 &$-$42.7& Fe II  (74)& 2.60 &           \\
 4798.54 & 0.28 & 1.22 &$-$42.5& Ti II  (17)&  1.32 &                  & 6516.05 &  2.44 & 2.00 &$-$41.0& Fe II  (74)& 2.48 &           \\
 4805.11 & 0.58 & 1.30 &$-$41.2& Ti II  (92)&  1.75 &                  & 6562.82 &105.00 &15.50 & $-$9.1& H   I  (1)& 5.91 &           \\
 4824.13 & 1.07 & 1.51 &$-$45.4& Cr II  (30)&  2.19 &  b:              & 6604.60 &  0.30 & 1.11 &$-$31.3& Sc II  (19)& 2.76 &           \\
 4836.22 & 0.42 & 1.23 &$-$43.4& Cr II  (30)&  2.02 &                  & 6613.63 &  0.17 & 0.84 &$-$26.3& DIB        & 0.97 &           \\
 4848.24 & 0.43 & 1.23 &$-$66.2& Cr II  (30)&  1.73 &  b w/H$\beta$    & 6660.64 &  0.14 & 0.93 &$-$27.5& DIB        & 2.69 &           \\
 4861.33 & 6.58 & 0.25 &$-$423.3& H  I  (1)&  8.75 &                  & 6699.32 &  0.02 & 0.98 &$-$34.9& DIB        & 0.87 &           \\
 4861.33 &16.30 & 4.75 &$-$11.1& H   I  (1)&  3.50 &                  & 6717.00 &  0.00 & 1.13 &$-$451.1&S  II  (2)& 0.00 &           \\
\hline
 4876.41 & 0.83 & 1.35 &$-$50.5& Cr II  (30)&  2.35 &                  & 6717.00 &  0.00 & 1.13 &$-$115.7&S  II  (2)& 0.98 &           \\
 4884.57 & 0.52 & 1.24 &$-$80.5& Cr II  (30)&  1.92 &                  & 6717.69 &  0.10 & 1.06 &$-$21.9& Ca  I  (3)& 2.05 &  +p       \\
 4899.90 & 0.33 & 1.22 &$-$22.7& Fe II  (30)&  1.48 &  P Cyg:, ID:     & 6731.30 &  0.00 & 1.17 &$-$400.7&S  II  (2)& 0.00 &           \\
 4911.20 & 0.54 & 1.27 &$-$45.2& Ti II (114)&  1.89 &  b               & 6731.30 &  0.00 & 1.29 &$-$97.1& S  II  (2)& 1.43 &           \\
 4923.92 & 2.60 & 0.57 &$-$396.6& Fe II (42)&  5.67 &                  & 6828.50 &  0.15 & 1.06 &$-$51.4& C   I  (21)& 2.64 &  ID:      \\
 4923.92 & 3.44 & 2.32 &$-$40.8& Fe II  (42)&  2.50 &                  & 7004.60 &  0.16 & 1.07 &$-$44.5& Ti  I (256)& 1.81 &  ID:      \\
 4934.09 & 0.35 & 1.17 &$-$53.5& Ba II  (1)&  2.21 &                  & 7155.14 &  0.00 & 1.15 &$-$86.4& Fe II  (14)& 0.00 &           \\
 4957.15 & 0.16 & 1.19 &$-$18.8& Ba II  (10)&  0.95 &  ID:             & 7214.69 &  0.34 & 1.12 &$-$37.8& Fe II  (30)& 2.72 &  ID:      \\
 4993.35 & 0.83 & 1.35 &$-$42.7& Fe II  (36)&  2.92 &                  & 7222.39 &  0.00 & 1.20 &$-$28.7& Fe II  (73)& 0.00 &  c        \\
 5018.43 & 3.36 & 0.59 &$-$417.9& Fe II  (42)&  7.47 &                 & 7291.46 &  0.00 & 1.52 &$-$37.4& Ca II  (1)& 0.00 &  c        \\
 5018.43 & 3.51 & 2.32 &$-$37.7& Fe II  (42)&  2.58 &                  & 7307.97 &  0.00 & 1.23 &$-$27.5& Fe II  (73)& 0.00 &  c        \\
 5031.02 & 0.25 & 1.17 &$-$42.3& Sc II  (23)&  1.31 &                  & 7320.70 &  0.00 & 1.20 &$-$41.0& Fe II  (73)& 0.00 &  c        \\
 5129.14 & 0.00 & 1.47 &$-$45.0& Ti II  (86)&  0.00 &  b               & 7323.88 &  0.00 & 1.41 &$-$42.6& Ca II  (1)& 0.00 &  +p       \\
 5146.06 & 0.16 & 1.12 &$-$39.7& O   I  (28)&  1.15 &                  & 7376.46 &  0.00 & 1.17 &$-$61.4& Fe II  ()& 0.00 &  +p       \\
 5154.06 & 1.44 & 1.52 &$-$47.2& Ti II  (70)&  3.22 &                  & 7462.38 &  1.14 & 1.40 &$-$42.2& Fe II  (73)& 2.83 &           \\
 5169.03 & 3.30 & 0.47 &$-$363.9& Fe II  (42)&  5.86 &                 & 7533.42 &  0.34 & 1.10 &$-$53.8& Fe II  (72)& 3.06 &           \\
 5169.03 & 0.00 & 2.28 &$-$38.3& Fe II  (42)&  0.00 &                  & 7698.98 &  0.00 & 0.78 &$-$42.9& K   I  (1)& 0.00 &  +2f      \\
 5172.68 & 0.00 & 1.83 &$-$60.9& Mg  I  (2)&  0.00 &  +p              & 7698.98 &  0.00 & 0.56 &$-$31.6& K   I  (1)& 0.00 &           \\
 5183.60 & 0.00 & 1.59 &$-$40.5& Mg  I  (2)&  0.00 &                  & 7698.98 &  0.00 & 0.92 &$-$14.0& K   I  (1)& 0.00 &           \\
 5188.70 & 0.00 & 1.47 &$-$45.1& Ti II  (70)&  0.00 &                  & 7711.71 &  1.75 & 1.52 &$-$43.6& Fe II  (73)& 3.27 &           \\
 5197.57 & 2.53 & 2.13 &$-$40.4& Fe II  (49)&  2.38 &                  & 7774.00 &  5.15 & 0.59 &$-$323.0& O   I  (1)&12.70 &          \\
 5226.53 & 1.22 & 1.59 &$-$34.4& Ti II  (70)&  2.00 &                  & 8327.05 &  0.15 & 1.18 &$-$47.5& Fe  I  (60)& 1.67 &           \\
 5234.62 & 0.00 & 2.05 &$-$44.7& Fe II  (49)&  1.97 &  b:              & 8387.78 &  0.00 & 1.27 &$-$37.5& Fe  I  (60)& 0.00 &  b w/Pa20 \\
 5254.92 & 0.62 & 1.30 &$-$37.7& Fe II  (49)&  1.92 &  b               & 8413.32 &  1.27 & 1.24 &$-$51.0& H   I  (1)& 5.89 &  b: Pa19  \\
 5261.71 & 0.00 & 1.14 &$-$29.1& Ca  I  (22)&  1.64 &  +f              & 8446.35 &  0.00 & 1.96 &$-$55.7& O   I  (4)& 3.54 &  b:       \\
 5264.80 & 0.50 & 1.25 &$-$45.6& Fe II  (48)&  1.88 &                  & 8467.26 &  1.27 & 1.26 &$-$39.3& H   I  (1)& 4.89 &           \\
 5275.99 & 0.31 & 1.19 &$-$408.9& Fe II  (49)&  1.55 &  bp:            & 8498.02 & 15.92 & 4.64 &$-$35.6& Ca II  (2)& 4.00 &  +P16 PCyg\\
 5275.99 & 1.94 & 1.83 &$-$48.3& Fe II  (49)&  2.32 &                  & 8542.09 &  2.82 & 0.78 &$-$445.0& Ca II (2)&11.77 &  +P15 PCyg\\
 5284.09 & 1.33 & 1.68 &$-$44.9& Fe II  (41)&  1.89 &                  & 8542.09 & 18.40 & 4.56 &$-$19.0& Ca II  (2)& 5.08 &           \\
 5305.85 & 0.07 & 1.06 &$-$40.1& Cr II  (24)&  0.90 &                  & 8662.14 &  2.16 & 0.85 &$-$417.7& Ca II (2)&13.39 &           \\
 5316.78 & 0.99 & 0.77 &$-$378.0& Fe II  (48)&  4.24 &                 & 8662.14 & 16.30 & 4.20 &$-$26.0& Ca II  (2)& 4.93 &  +P13 PCyg\\
 5316.78 & 2.80 & 2.29 &$-$53.0& Fe II  (48)&  2.43 &                  & 8688.63 &  0.48 & 1.20 &$-$43.5& Fe  I  (60)& 2.38 &           \\
 5362.86 & 1.77 & 1.83 &$-$45.3& Fe II  (48)&  2.12 &  n, PCyg         & 8727.40 &  0.27 & 1.12 &$-$69.5& C   I  (3)& 2.22 &  ID:      \\
 5526.80 & 0.74 & 1.33 &$-$42.3& Sc II  (31)&  2.33 &                  & 8750.00 &  2.00 & 1.44 &$-$34.6& Pa 12      & 5.02 &  PCyg     \\
 5534.86 & 1.27 & 1.61 &$-$46.1& Fe II  (55)&  2.10 &                  & 8806.77 &  0.97 & 1.22 &$-$44.3& Mg  I  (7)& 4.49 &  P Cyg:   \\
 5577.34 & 0.79 & 7.58 &  10.8& O    I  (3)&  0.09 &  t               & 8824.22 &  0.55 & 1.16 &$-$39.8& Fe  I  (60)& 3.36 &           \\
 5586.76 & 0.23 & 1.10 &$-$33.3& Fe  I (686)&  2.35 &                  & 8862.79 &  1.56 & 1.43 &$-$50.4& Pa 11      & 3.49 &      P Cyg\\
 5615.65 & 0.17 & 1.10 &$-$47.6& Fe  I (686)&  1.84 &                  & 8927.36 &  1.11 & 1.14 &$-$59.8& Ca II  ()& 4.03 &  c        \\
\hline
\end{tabular}
\medskip
Column information: 1 -- laboratory wavelength of the line; 2~-- equivalent width in~\AA; 3~-- peak intensity in continuum units; 4~-- heliocentric radial velocity of the line peak from fitting to a
Gaussian; 5~-- line identification with the multiplet number according to Coluzzi (\cite{col93}); 6~-- full-width at half maximum in~\AA; 7~-- comment.  \\
Comment notation: b~-- blend; b:~-- possible blend; c~-- contaminated with telluric spectrum; n~-- noisy; t~-- telluric line; ID:~-- uncertain identification; +f~-- blend with the following line; +p~-- blend with the previous line, P~Cyg~-- the line has a P~Cyg type profile; P~Cyg:~-- weak or noisy P~Cyg type absorption. \\
Comments to table content: zeros in columns mean that the parameter cannot be measured due to noisiness or blending. Parameters of the P~Cyg type absorption components are measured
separately from the emission components of the same line only in cases when the absorptions are clearly seen. Equivalent width and {\it FWHM} for double-peaked profiles (e.g., [S~{\sc ii}]~$\lambda$6717~\AA\ and $\lambda$6731~\AA).
\end{table}