Skip to content
Snippets Groups Projects
Commit 0e6bcbbc authored by Colin Clark's avatar Colin Clark
Browse files

Added two remaining young pulsars from FGRP4

parent bd88d170
Branches
No related tags found
1 merge request!2Added two remaining young pulsars from FGRP4
......@@ -44,7 +44,7 @@ combination, these improvements led to FGRP4 being our most sensitive survey to
<p>We are very pleased to be able to announce the first set of results from FGRP4. Including the
discovery of PSR J1906+0722 at the beginning of this survey, these bring the total number of
gamma-ray pulsars discovered by our Einstein@Home volunteers to 19. You can find the details and
gamma-ray pulsars discovered by our Einstein@Home volunteers to 21. You can find the details and
plots of all the new discoveries below!</p>
<p>Currently we are working very hard to study all of the results from FGRP4, and we are hoping to
......@@ -686,6 +686,50 @@ gamma-ray emission as a function of pulsar rotation phase and resolve the pulse
</tr>
<!-- psr end //-->
<!-- psr start //-->
<tr>
<td>
<table style="text-align: left; width: 100%;" border="0" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td style="vertical-align: top;">
<table style="text-align: left; width: 202px; height: 41px; font-weight: bold;" border="0" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td style="vertical-align: top; background-color: rgb(204, 204, 204); text-align: center;">Pulsar J1641-5317</td>
</tr>
</tbody>
</table>
<br>
</td>
<td colspan="1" rowspan="2" style="vertical-align: top;" width="460">
<img style="width: 250px;" alt="J1641" src="img/fhist-J1641.png">
<img style="width: 196px; height: 373px;" alt="J1641" src="img/tvsph-J1641.png">
</td>
</tr>
<tr>
<td style="vertical-align: top;">
<b>Volunteers (Country):</b><br>
<a href="https://einsteinathome.org/show_user.php?userid=2013">UW-Madison CAE (USA)</a> and <a href="https://einsteinathome.org/show_user.php?userid=342084">ATLAS AEI Hannover (Germany)</a><br><br>
<b>Date:</b><br>
30 Dec 2015<br><br>
<b>Survey:</b><br>
FGRP4<br><br>
<b>Selected pulsar parameters:</b><br>
Right ascension: 16:41<br>
Declination: -53:17<br>
Spin frequency: 5.71 Hz<br>
First frequency derivate: -1.21 x 10<sup>-13</sup> Hz/s<br>
Characteristic age: 750 kyrs<br>
Spin-down power: 2.7 x 10<sup>34</sup> erg/s<br>
</td>
</tr>
</tbody>
</table>
<br><hr>
</td>
</tr>
<!-- psr end //-->
<!-- psr start //-->
<tr>
<td>
<table style="text-align: left; width: 100%;" border="0" cellpadding="0" cellspacing="0">
......@@ -730,6 +774,50 @@ gamma-ray emission as a function of pulsar rotation phase and resolve the pulse
</tr>
<!-- psr end //-->
<!-- psr start //-->
<tr>
<td>
<table style="text-align: left; width: 100%;" border="0" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td style="vertical-align: top;">
<table style="text-align: left; width: 202px; height: 41px; font-weight: bold;" border="0" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td style="vertical-align: top; background-color: rgb(204, 204, 204); text-align: center;">Pulsar J1817-1742</td>
</tr>
</tbody>
</table>
<br>
</td>
<td colspan="1" rowspan="2" style="vertical-align: top;" width="460">
<img style="width: 250px;" alt="J1817" src="img/fhist-J1817.png">
<img style="width: 196px; height: 373px;" alt="J1817" src="img/tvsph-J1817.png">
</td>
</tr>
<tr>
<td style="vertical-align: top;">
<b>Volunteers (Country):</b><br>
<a href="https://einsteinathome.org/show_user.php?userid=132914">dbillenness (Canada)</a> and <a href="https://einsteinathome.org/show_user.php?userid=499225">Jon Kerfoot (USA)</a><br><br>
<b>Date:</b><br>
24 Dec 2015<br><br>
<b>Survey:</b><br>
FGRP4<br><br>
<b>Selected pulsar parameters:</b><br>
Right ascension: 18:17<br>
Declination: -17:42<br>
Spin frequency: 6.68 Hz<br>
First frequency derivate: -9.18 x 10<sup>-13</sup> Hz/s<br>
Characteristic age: 115 kyrs<br>
Spin-down power: 2.42 x 10<sup>35</sup> erg/s<br>
</td>
</tr>
</tbody>
</table>
<br><hr>
</td>
</tr>
<!-- psr end //-->
<!-- psr start //-->
<tr>
<td>
<table style="text-align: left; width: 100%;" border="0" cellpadding="0" cellspacing="0">
......
img/fhist-J1641.png

19.1 KiB

img/fhist-J1817.png

19.6 KiB

img/psrs_vs_time.png

26.3 KiB | W: | H:

img/psrs_vs_time.png

19.4 KiB | W: | H:

img/psrs_vs_time.png
img/psrs_vs_time.png
img/psrs_vs_time.png
img/psrs_vs_time.png
  • 2-up
  • Swipe
  • Onion skin
img/tvsph-J1641.png

447 KiB

img/tvsph-J1817.png

380 KiB

......@@ -35,8 +35,9 @@ psr_timeline = np.array([[0,0],
[64,4], # 4 E@H Pulsars, 2013
[84,1], # J1906
[91, 13], # Next bunch of FGRP4 pulsars without J1208
[100, 1],
[102,0]]) # J1208
[100,1], # J1208
[106, 2], # J1817, J1641
[114,0]])
FGRP1_idx = 8
FGRP4_idx = 9
AEI_idx = 5
......@@ -54,7 +55,7 @@ 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.xticks(np.arange(2009,2019))
plt.ylabel('Total number of pulsars discovered')
plt.title('Timeline of gamma-ray pulsar discoveries in blind searches with Fermi LAT')
......@@ -69,9 +70,9 @@ plt.text(months[FGRP4_idx] + 0.75, 35,'E@H\nFGRP4',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[-2],months[-2],months[-1]],
[0,0,0,0,0,0],
[psrs[FGRP4_idx],psrs[FGRP4_idx],psrs[FGRP4_idx+1],psrs[FGRP4_idx+1],psrs[-2],psrs[-1]],
ax.fill_between([months[FGRP4_idx],months[FGRP4_idx+1],months[FGRP4_idx+1],months[FGRP4_idx+2],months[FGRP4_idx+2],months[-2],months[-2],months[-1]],
[0,0,0,0,0,0,0,0],
[psrs[FGRP4_idx],psrs[FGRP4_idx],psrs[FGRP4_idx+1],psrs[FGRP4_idx+1],psrs[FGRP4_idx+2],psrs[FGRP4_idx+2],psrs[-2],psrs[-1]],
color='grey')
ax.fill_between([months[AEI_idx],months[AEI_idx + 1],months[AEI_idx + 1],months[FGRP1_idx]],
......@@ -82,6 +83,7 @@ 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.ylim(ymin=0)
plt.savefig('img/psrs_vs_time.png',bbox_inches='tight')
plt.show()
0% Loading or .
You are about to add 0 people to the discussion. Proceed with caution.
Please register or to comment