All Figures

$\begin{figure} \par\mbox{\resizebox{6.2cm}{!}{\includegraphics[angle=270]{6855f1... ...ps}}\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855f1d.ps}} } \end{figure}$ Figure 1: The left panel shows a pulse-stack of fifty successive pulses of PSR B0818-13. Two successive drift bands are vertically separated by P₃ and horizontally by P₂. The products of our analysis are shown for three pulsars. The top panel shows the integrated pulse profile (solid line), the longitude-resolved modulation index (solid line with error bars) and the longitude-resolved standard deviation (open circles). Below this panel the LRFS is shown with - on its horizontal axis - the pulse longitude in degrees, which is also the scale for the abscissa of the plot above. Below the LRFS the 2DFS is plotted and the power in the 2DFS is vertically integrated between the dashed lines, producing the bottom plots. Both the LRFS and 2DFS are horizontally integrated, producing the side-panels of the spectra.
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In the text

$\begin{figure} \par\includegraphics[angle=270,width=7.85cm,clip]{6855f2.ps}\end{figure}$ Figure 2: The solid line shows the fraction of pulsars we observe to exhibit the drifting phenomenon versus the measured S/N ratio of the observation. The dashed histogram shows the total number of pulsars observed in each S/N ratio bin. The root-mean-square (rms) is calculated as an estimate for the error (if the bin contains more than one observation). The dotted line is a fit for the S/N dependence of the chance to detect drifting subpulses and the dash-dotted line is that of Paper I.
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In the text

$\begin{figure} \par\includegraphics[angle=270,width=13cm,clip]{6855f3.ps}\end{figure}$ Figure 3: The ${P} -\dot {P}$ diagram of the analysed pulsars at 92 cm (including the low S/N observations). The pulsars without drifting subpulses are the dots, the diffuse (Dif and Dif ${^\ast }$ ) drifters are the open stars, the coherent drifters are the filled stars and the pulsars showing longitude stationary subpulse modulation are the open circles. Lines of equal surface magnetic field strength and characteristic ages are plotted, as well as a death line (Chen & Ruderman 1993).
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In the text

$\begin{figure} \par\includegraphics[angle=270,width=7.75cm,clip]{6855f4a.ps}\hspace*{8mm} \includegraphics[angle=270,width=7.75cm,clip]{6855f4b.ps}\end{figure}$ Figure 4: The left panel shows the histogram of the characteristic ages of the analyzed pulsars with a S/N $\geq$ 100. The solid line is the age distribution of pulsars without drifting subpulses, the dashed line shows all the drifters and the dotted line shows the coherent drifters. The right panel shows the " S/N versus age bias'' corrected histogram.
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In the text

$\begin{figure} \par\includegraphics[angle=270,width=7.9cm,clip]{6855f5.ps}\end{figure}$ Figure 5: The modulation index distribution of the pulsars without drifting subpulses (solid line), with drifting subpulses (dashed line) and with coherent drifting subpulses (dotted line). Only observations with a $S/N\geq 100$ are included this plot.
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In the text

$\begin{figure} \par\includegraphics[angle=270,width=7.9cm,clip]{6855f6.ps}\end{figure}$ Figure 6: The modulation index measured at 21 cm versus that measured at 92 cm. The points would lie on the dotted line when the modulation index is frequency independent. Only observations with a $S/N\geq 100$ are included this plot. The dashed and solid line are straight line fits through the data-points with and without weighting for the errorbars. The symbols are identical to those in Fig. 3.
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In the text

$\begin{figure} \par\includegraphics[angle=270,width=12cm,clip]{6855f7.ps}\end{figure}$ Figure 7: The modulation index for all analyzed pulsars with a $S/N\geq 100$ versus the four complexity parameters as described in the text.
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In the text

$\begin{figure} \par\includegraphics[angle=270,width=8.3cm,clip]{6855f8.ps}\end{figure}$ Figure 8: The probability functions $P(\rho )$ of the correlation coefficient $\rho$ for the four complexity parameters, the pulse period, the spin-down parameter and the characteristic age of the pulsar. The position of the maximum and the 1- $\sigma$ widths are indicated by the gray lines.
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In the text

$\begin{figure} \par\includegraphics[angle=270,width=7.9cm,clip]{6855f9.ps}\end{figure}$ Figure 9: The measured value of the vertical drift band separation P₃ compared at the two frequencies. Also the low-S/Nobservations are included. The diffuse (Dif and Dif ${^\ast }$ ) drifters are the open stars, the coherent drifters are the filled stars and the pulsars with longitude stationary subpulse modulation are the open circles. The dotted line shows the expected correlation when P₃ is independent of frequency.
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In the text

$\begin{figure} \par\includegraphics[angle=270,width=7.9cm,clip]{6855f10.ps}\end{figure}$ Figure 10: The measured values of the vertical drift band separation P₃ versus the pulsar age of all the pulsars showing the drifting phenomenon. The coherent drifters are the filled circles, the Dif drifters (with drift feature clearly separated from the alias borders) are the open circles and the Dif ${^\ast }$ drifters are the small dots. This figure contains both 92 and 21-cm observations.
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In the text

$\begin{figure} \par\mbox{\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a1... ...s}}\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a10.ps}} }\end{figure}$ Figure A.1: The integrated pulse profile (solid line) and the modulation index (solid points) are shown in the top plot, which is aligned with the LRFS. Below the LRFS is the 2DFS plotted. The integrated power of the spectra are shown the side- and bottom-panels of the spectra. See the main text and Fig. 1 for further details about the plots. The badly affected frequencies in the spectra are set to zero.

In the text

$\begin{figure} \par\mbox{\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a1... ...s}}\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a20.ps}} }\end{figure}$ Figure A.2: The integrated pulse profile (solid line) and the modulation index (solid points) are shown in the top plot, which is aligned with the LRFS. Below the LRFS is the 2DFS plotted. The integrated power of the spectra are shown the side- and bottom-panels of the spectra. See the main text and Fig. 1 for further details about the plots. The badly affected frequencies in the spectra are set to zero.

In the text

$\begin{figure} \par\mbox{\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a2... ...s}}\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a30.ps}} }\end{figure}$ Figure A.3: The integrated pulse profile (solid line) and the modulation index (solid points) are shown in the top plot, which is aligned with the LRFS. Below the LRFS is the 2DFS plotted. The integrated power of the spectra are shown the side- and bottom-panels of the spectra. See the main text and Fig. 1 for further details about the plots. The badly affected frequencies in the spectra are set to zero.

In the text

$\begin{figure} \par\mbox{\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a3... ...s}}\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a40.ps}} }\end{figure}$ Figure A.4: The integrated pulse profile (solid line) and the modulation index (solid points) are shown in the top plot, which is aligned with the LRFS. Below the LRFS is the 2DFS plotted. The integrated power of the spectra are shown the side- and bottom-panels of the spectra. See the main text and Fig. 1 for further details about the plots. The badly affected frequencies in the spectra are set to zero.

In the text

$\begin{figure} \par\mbox{\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a4... ...s}}\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a50.ps}} }\end{figure}$ Figure A.5: The integrated pulse profile (solid line) and the modulation index (solid points) are shown in the top plot, which is aligned with the LRFS. Below the LRFS is the 2DFS plotted. The integrated power of the spectra are shown the side- and bottom-panels of the spectra. See the main text and Fig. 1 for further details about the plots. The badly affected frequencies in the spectra are set to zero.

In the text

$\begin{figure} \par\mbox{\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a5... ...s}}\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a60.ps}} }\end{figure}$ Figure A.6: The integrated pulse profile (solid line) and the modulation index (solid points) are shown in the top plot, which is aligned with the LRFS. Below the LRFS is the 2DFS plotted. The integrated power of the spectra are shown the side- and bottom-panels of the spectra. See the main text and Fig. 1 for further details about the plots. The badly affected frequencies in the spectra are set to zero.

In the text

$\begin{figure} \par\mbox{\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a6... ...s}}\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a70.ps}} }\end{figure}$ Figure A.7: The integrated pulse profile (solid line) and the modulation index (solid points) are shown in the top plot, which is aligned with the LRFS. Below the LRFS is the 2DFS plotted. The integrated power of the spectra are shown the side- and bottom-panels of the spectra. See the main text and Fig. 1 for further details about the plots. The badly affected frequencies in the spectra are set to zero.

In the text

$\begin{figure} \par\mbox{\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a7... ...s}}\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a80.ps}} }\end{figure}$ Figure A.8: The integrated pulse profile (solid line) and the modulation index (solid points) are shown in the top plot, which is aligned with the LRFS. Below the LRFS is the 2DFS plotted. The integrated power of the spectra are shown the side- and bottom-panels of the spectra. See the main text and Fig. 1 for further details about the plots. The badly affected frequencies in the spectra are set to zero.

In the text

$\begin{figure} \par\mbox{\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a8... ...s}}\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a90.ps}} }\end{figure}$ Figure A.9: The integrated pulse profile (solid line) and the modulation index (solid points) are shown in the top plot, which is aligned with the LRFS. Below the LRFS is the 2DFS plotted. The integrated power of the spectra are shown the side- and bottom-panels of the spectra. See the main text and Fig. 1 for further details about the plots. The badly affected frequencies in the spectra are set to zero.

In the text

$\begin{figure} \par\mbox{\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a9... ...}}\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a100.ps}} }\end{figure}$ Figure A.10: The integrated pulse profile (solid line) and the modulation index (solid points) are shown in the top plot, which is aligned with the LRFS. Below the LRFS is the 2DFS plotted. The integrated power of the spectra are shown the side- and bottom-panels of the spectra. See the main text and Fig. 1 for further details about the plots. The badly affected frequencies in the spectra are set to zero.

In the text

$\begin{figure} \par\mbox{\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a1... ...}}\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a110.ps}} }\end{figure}$ Figure A.11: The integrated pulse profile (solid line) and the modulation index (solid points) are shown in the top plot, which is aligned with the LRFS. Below the LRFS is the 2DFS plotted. The integrated power of the spectra are shown the side- and bottom-panels of the spectra. See the main text and Fig. 1 for further details about the plots. The badly affected frequencies in the spectra are set to zero.

In the text

$\begin{figure} \par\mbox{\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a1... ...}}\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a120.ps}} }\end{figure}$ Figure A.12: The integrated pulse profile (solid line) and the modulation index (solid points) are shown in the top plot, which is aligned with the LRFS. Below the LRFS is the 2DFS plotted. The integrated power of the spectra are shown the side- and bottom-panels of the spectra. See the main text and Fig. 1 for further details about the plots. The badly affected frequencies in the spectra are set to zero.

In the text

$\begin{figure} \par\mbox{\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a1... ...}}\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a130.ps}} }\end{figure}$ Figure A.13: The integrated pulse profile (solid line) and the modulation index (solid points) are shown in the top plot, which is aligned with the LRFS. Below the LRFS is the 2DFS plotted. The integrated power of the spectra are shown the side- and bottom-panels of the spectra. See the main text and Fig. 1 for further details about the plots. The badly affected frequencies in the spectra are set to zero.

In the text

$\begin{figure} \par\mbox{\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a1... ...}}\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a140.ps}} }\end{figure}$ Figure A.14: The integrated pulse profile (solid line) and the modulation index (solid points) are shown in the top plot, which is aligned with the LRFS. Below the LRFS is the 2DFS plotted. The integrated power of the spectra are shown the side- and bottom-panels of the spectra. See the main text and Fig. 1 for further details about the plots. The badly affected frequencies in the spectra are set to zero.

In the text

$\begin{figure} \par\mbox{\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a1... ...}}\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a150.ps}} }\end{figure}$ Figure A.15: The integrated pulse profile (solid line) and the modulation index (solid points) are shown in the top plot, which is aligned with the LRFS. Below the LRFS is the 2DFS plotted. The integrated power of the spectra are shown the side- and bottom-panels of the spectra. See the main text and Fig. 1 for further details about the plots. The badly affected frequencies in the spectra are set to zero.

In the text

$\begin{figure} \par\mbox{\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a1... ...}}\resizebox{3.7cm}{!}{\includegraphics[angle=270]{6855a158.ps}} }\end{figure}$ Figure A.16: The integrated pulse profile (solid line) and the modulation index (solid points) are shown in the top plot, which is aligned with the LRFS. Below the LRFS is the 2DFS plotted. The integrated power of the spectra are shown the side- and bottom-panels of the spectra. See the main text and Fig. 1 for further details about the plots. The badly affected frequencies in the spectra are set to zero.

In the text

$\begin{figure} \mbox{\resizebox{3.5cm}{!}{\includegraphics[angle=270]{6855b1.ps}... ...ps}}\resizebox{3.5cm}{!}{\includegraphics[angle=270]{6855b5.ps}} }\end{figure}$ Figure A.17: The integrated pulse profile (solid line) and the modulation index (solid points) are shown in the top plot, which is aligned with the LRFS. Below the LRFS are two 2DFSs plotted of different pulse longitude ranges. The integrated power of the spectra are shown the side- and bottom-panels of the spectra. See the main text and Fig. 1 for further details about the plots. The badly affected frequencies in the spectra are set to zero.

In the text

$\begin{figure} \mbox{\resizebox{3.5cm}{!}{\includegraphics[angle=270]{6855b6.ps}... ...s}}\resizebox{3.5cm}{!}{\includegraphics[angle=270]{6855b10.ps}} }\end{figure}$ Figure A.18: The integrated pulse profile (solid line) and the modulation index (solid points) are shown in the top plot, which is aligned with the LRFS. Below the LRFS are two 2DFSs plotted of different pulse longitude ranges. The integrated power of the spectra are shown the side- and bottom-panels of the spectra. See the main text and Fig. 1 for further details about the plots. The badly affected frequencies in the spectra are set to zero.

In the text

$\begin{figure} \mbox{\resizebox{3.5cm}{!}{\includegraphics[angle=270]{6855b11.ps... ...s}}\resizebox{3.5cm}{!}{\includegraphics[angle=270]{6855b15.ps}} }\end{figure}$ Figure A.19: The integrated pulse profile (solid line) and the modulation index (solid points) are shown in the top plot, which is aligned with the LRFS. Below the LRFS are two 2DFSs plotted of different pulse longitude ranges. The integrated power of the spectra are shown the side- and bottom-panels of the spectra. See the main text and Fig. 1 for further details about the plots. The badly affected frequencies in the spectra are set to zero.

In the text

$\begin{figure} \mbox{\resizebox{3.5cm}{!}{\includegraphics[angle=270]{6855b16.ps... ...s}}\resizebox{3.5cm}{!}{\includegraphics[angle=270]{6855b20.ps}} }\end{figure}$ Figure A.20: The integrated pulse profile (solid line) and the modulation index (solid points) are shown in the top plot, which is aligned with the LRFS. Below the LRFS are two 2DFSs plotted of different pulse longitude ranges. The integrated power of the spectra are shown the side- and bottom-panels of the spectra. See the main text and Fig. 1 for further details about the plots. The badly affected frequencies in the spectra are set to zero.

In the text

$\begin{figure} \mbox{\resizebox{3.5cm}{!}{\includegraphics[angle=270]{6855b21.ps... ...s}}\resizebox{3.5cm}{!}{\includegraphics[angle=270]{6855b25.ps}} }\end{figure}$ Figure A.21: The integrated pulse profile (solid line) and the modulation index (solid points) are shown in the top plot, which is aligned with the LRFS. Below the LRFS are two 2DFSs plotted of different pulse longitude ranges. The integrated power of the spectra are shown the side- and bottom-panels of the spectra. See the main text and Fig. 1 for further details about the plots. The badly affected frequencies in the spectra are set to zero.

In the text

$\begin{figure} \mbox{\resizebox{3.5cm}{!}{\includegraphics[angle=270]{6855b26.ps... ...s}}\resizebox{3.5cm}{!}{\includegraphics[angle=270]{6855b30.ps}} }\end{figure}$ Figure A.22: The integrated pulse profile (solid line) and the modulation index (solid points) are shown in the top plot, which is aligned with the LRFS. Below the LRFS are two 2DFSs plotted of different pulse longitude ranges. The integrated power of the spectra are shown the side- and bottom-panels of the spectra. See the main text and Fig. 1 for further details about the plots. The badly affected frequencies in the spectra are set to zero.

In the text

$\begin{figure} \par\mbox{\resizebox{3.5cm}{!}{\includegraphics[angle=270]{6855b3... ...s}}\resizebox{3.5cm}{!}{\includegraphics[angle=270]{6855b33.ps}} }\end{figure}$ Figure A.23: The integrated pulse profile (solid line) and the modulation index (solid points) are shown in the top plot, which is aligned with the LRFS. Below the LRFS are two 2DFSs plotted of different pulse longitude ranges. The integrated power of the spectra are shown the side- and bottom-panels of the spectra. See the main text and Fig. 1 for further details about the plots. The badly affected frequencies in the spectra are set to zero.

In the text

$\begin{figure} \par\includegraphics[angle=270,width=7.75cm,clip]{6855f4a.ps}\hspace*{8mm} \includegraphics[angle=270,width=7.75cm,clip]{6855f4b.ps}\end{figure}$	Figure 4: The left panel shows the histogram of the characteristic ages of the analyzed pulsars with a S/N $\geq$ 100. The solid line is the age distribution of pulsars without drifting subpulses, the dashed line shows all the drifters and the dotted line shows the coherent drifters. The right panel shows the " S/N versus age bias'' corrected histogram.
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$\begin{figure} \par\includegraphics[angle=270,width=7.9cm,clip]{6855f5.ps}\end{figure}$	Figure 5: The modulation index distribution of the pulsars without drifting subpulses (solid line), with drifting subpulses (dashed line) and with coherent drifting subpulses (dotted line). Only observations with a $S/N\geq 100$ are included this plot.
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$\begin{figure} \par\includegraphics[angle=270,width=12cm,clip]{6855f7.ps}\end{figure}$	Figure 7: The modulation index for all analyzed pulsars with a $S/N\geq 100$ versus the four complexity parameters as described in the text.
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$\begin{figure} \par\includegraphics[angle=270,width=8.3cm,clip]{6855f8.ps}\end{figure}$	Figure 8: The probability functions $P(\rho )$ of the correlation coefficient $\rho$ for the four complexity parameters, the pulse period, the spin-down parameter and the characteristic age of the pulsar. The position of the maximum and the 1- $\sigma$ widths are indicated by the gray lines.
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