Adding pulsars-by-time graph

psrs_by_time.py

+import matplotlib.pyplot as plt
+from matplotlib.ticker import ScalarFormatter
+import numpy as np
+plt.rc('text',usetex=True)
+plt.rc('font',family='serif')
+
+# Timeline of pulsar discoveries: [month since launch, total psrs]
+
+# -------------------------------------------------------------------------------------
+# By T_obs
+# psr_timeline = np.array([[0,0],
+#                          [2,1],  # CTA 1
+#                          [5,15], # 16 PSRs - CTA1, Abdo et al., 2009
+#                          [11,8], # 8 PSRs, Saz Parkinson et al., 2010
+#                          [23,2], # 2 PSRs, Saz Parkinson et al., 2010
+#                          [32,10], # 9 Pulsars + J1838, Pletsch et al. 2012
+#                          [36,4], # 4 E@H Pulsars, 2013
+#                          [47,1],  # J1311-3430
+#                          [68,10], # First bunch of FGRP4 pulsars - 2 MSPs
+#                          [74, 4], # Next bunch of FGRP4 pulsars - J1208
+#                          [91, 0]] ) # Now
+# FGRP1_idx = 6
+# FGRP4_idx = 8
+
+# -------------------------------------------------------------------------------------
+# By publication date
+psr_timeline = np.array([[0,0],
+                         [4,1],  # CTA 1
+                         [12,15], # 16 PSRs - CTA1, Abdo et al., 2009
+                         [27,8], # 8 PSRs, Saz Parkinson et al., 2010
+                         [33,2], # 2 PSRs, Saz Parkinson et al., 2010
+                         [39,9], # 9 Pulsars, Pletsch et al. 2012
+                         [47,1], # J1838
+                         [47,1],  # J1311-3430
+                         [64,4], # 4 E@H Pulsars, 2013
+                         [84,1], # J1906
+                         [91, 13], # Next bunch of FGRP4 pulsars without J1208
+                         [95, 0]] ) # Now
+FGRP1_idx = 8
+FGRP4_idx = 9
+AEI_idx = 5
+
+# -------------------------------------------------------------------------------------
+
+start = 54682
+mjd2008 = 54466
+
+months = 2008 + (psr_timeline[:,0] * (365.25 / 12) + (start - mjd2008))/365.25
+psrs = np.cumsum(psr_timeline[:,1])
+
+xfmt = ScalarFormatter(useOffset=False)
+
+fig = plt.figure(figsize=(10,5.5))
+ax = fig.add_subplot(111)
+plt.step(months, psrs,where='post',color='red',linewidth=2.0)
+plt.xticks(np.arange(2009,2017))
+plt.ylabel('Total number of pulsars discovered')
+plt.title('Timeline of gamma-ray pulsar discoveries in blind searches with Fermi LAT')
+
+ax.xaxis.set_major_formatter(xfmt)
+plt.xlim(months[0],months[-1])
+
+# Survey labels
+plt.text(months[FGRP1_idx] + 0.8, psrs[FGRP1_idx]/2.0,'E@H\nFGRP1',ha='center')
+plt.text(months[FGRP4_idx] + 0.5, psrs[-1]/2.0,'E@H\nFGRP4',ha='center')
+plt.text(months[AEI_idx] + 1.0, psrs[AEI_idx]/2.0,'ATLAS Cluster\n AEI Hannover',ha='center')
+
+# Survey shading
+ax.fill_between([months[FGRP1_idx],months[FGRP1_idx+1]],[0,0],[psrs[FGRP1_idx],psrs[FGRP1_idx]],color='darkgrey')
+
+ax.fill_between([months[FGRP4_idx],months[FGRP4_idx+1],months[FGRP4_idx+1],months[-1]],
+                [0,0,0,0],
+                [psrs[FGRP4_idx],psrs[FGRP4_idx],psrs[FGRP4_idx+1],psrs[-1]],
+                color='grey')
+
+ax.fill_between([months[AEI_idx],months[AEI_idx + 1],months[AEI_idx + 1],months[FGRP1_idx]],
+                [0,0,0,0],
+                [psrs[AEI_idx],psrs[AEI_idx],psrs[AEI_idx + 2],psrs[AEI_idx + 2]],color='lightgrey')
+
+ax.spines['right'].set_visible(False)
+ax.spines['top'].set_visible(False)
+ax.xaxis.set_ticks_position('bottom')
+ax.yaxis.set_ticks_position('left')
+plt.savefig('img/psrs_vs_time.png',bbox_inches='tight')
+plt.show()
+