{"id":1105,"date":"2013-06-30T09:00:47","date_gmt":"2013-06-30T17:00:47","guid":{"rendered":"http:\/\/jazzistentialism.com\/blog\/?p=1105"},"modified":"2014-06-05T20:20:39","modified_gmt":"2014-06-06T04:20:39","slug":"southern-rr-lyrae-period-analysis","status":"publish","type":"post","link":"http:\/\/jazzistentialism.com\/blog\/?p=1105","title":{"rendered":"Southern RR Lyrae period analysis"},"content":{"rendered":"

Seven RR Lyrae variable stars were imaged over 4 nights spanning 12 June to 19 June. Targets were chosen with \u2018all night\u2019 viewing potential, to maximise data collection over a single night.<\/p>\n

\"BHPav\"<\/a><\/p>\n

<\/p>\n

Aperture photometry was performed using MaxIM DL\u2019s Photometry function to derive instrumental magnitudes for each target. The resultant light curves were exported as CSV files for analysis in Microsoft Excel.<\/p>\n

Excel was used to create light curves for each of the targets. Custom formulae were used to \u2018wrap\u2019 time and provide for magnitude compensation. An additional formula was created to align curves by specifying a period based on a starting point determined through inspection of the plotted curves. Changes as small as 0.001 hr were used to fine tune alignment of the 4 curves, allowing a very accurate period to be determined.<\/p>\n

This \u2018calculated\u2019 period was then compared to published periods, available from the AAVSO VSI service.<\/p>\n

Results<\/h2>\n

1. BH Pav<\/h3>\n

Calculated period = 11.447 hours<\/p>\n

Published period = 11.44689 hours<\/p>\n

\"BHPav\"<\/a><\/p>\n

 <\/p>\n

\n

2. HX Ara<\/h3>\n

Calculated period = 5.265 hours<\/p>\n

Published period = 5.256 hours<\/p>\n

\"HXAra\"<\/a><\/p>\n

 <\/p>\n

\n

\u00a03. MS Ara<\/h3>\n

Calculated period = 12.600<\/p>\n

Published period = 12.59961<\/p>\n

\"MSAra\"<\/a><\/p>\n

 <\/p>\n

\n

\u00a04. V0690 Sco<\/h3>\n

Calculated Period = 11.814 hours<\/p>\n

Published Period = 11.81409 hours<\/p>\n

\"V0690Sco\"<\/a><\/p>\n

 <\/p>\n

\n

5. WY Pav<\/h3>\n

Calculated Period = 14.130 hours<\/p>\n

Published Period = 14.12573 hours<\/p>\n

\"WYPav\"<\/a><\/p>\n

 <\/p>\n

\n

6. V0487 Sco<\/h3>\n

Calculated Period = 7.900 hours<\/p>\n

Published Period = 7.899037 hours<\/p>\n

\"V0487Sco\"<\/a><\/p>\n

 <\/p>\n

\n

7. V0494 Sco<\/h3>\n

Calculated Period = 10.250 hours<\/p>\n

Published Period = 10.2552 hours<\/p>\n

\"VO494Sco\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Seven RR Lyrae variable stars were imaged over 4 nights spanning 12 June to 19 June. Targets were chosen with \u2018all night\u2019 viewing potential, to maximise data collection over a single night.<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0},"categories":[20],"tags":[],"_links":{"self":[{"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1105"}],"collection":[{"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1105"}],"version-history":[{"count":15,"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1105\/revisions"}],"predecessor-version":[{"id":1128,"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1105\/revisions\/1128"}],"wp:attachment":[{"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1105"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1105"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1105"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}