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drao [2017/12/13 15:31]
Déborah Paradis
drao [2023/04/11 15:21] (current)
Déborah Paradis
Line 1: Line 1:
 ====== DRAO 22 MHz radio continuum/ 1.4 GHz polarization ====== ====== DRAO 22 MHz radio continuum/ 1.4 GHz polarization ======
 +
 +/* AH: 25/08/18
 +should we separate this page into two separate surveys (22MHz, 1.4GHz polar)?
 +*/
  
 This 22 MHz radio continuum survey covers ~73% of the sky between declination -28° and +80°, derived from observations with the radiotelescope at the Dominion Radio Astrophyical Observatory (DRAO), at a resolution of 1.1°x1.7°secant(zenith angle). Units of the map are ''​KTB''​. ​ This 22 MHz radio continuum survey covers ~73% of the sky between declination -28° and +80°, derived from observations with the radiotelescope at the Dominion Radio Astrophyical Observatory (DRAO), at a resolution of 1.1°x1.7°secant(zenith angle). Units of the map are ''​KTB''​. ​
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 The Q and U maps are the combination of the 26-m DRAO (Dominion Radio Astrophysical Observatory) and the 30-m Villa Elisa polarization survey, at 1.4 GHz (21 cm), with an angular resolution of 36'. Units of the maps are ''​mKTB''​. The Q and U maps are the combination of the 26-m DRAO (Dominion Radio Astrophysical Observatory) and the 30-m Villa Elisa polarization survey, at 1.4 GHz (21 cm), with an angular resolution of 36'. Units of the maps are ''​mKTB''​.
  
-The Villa Elisa 30-m telescope was used to map the southern sky simultaneously in continuum and linear polarization,​ yielding a fully sampled map of the 21cm linearly polarized emission for declinations between -10 and -90 degrees. Data in the overlap region between -10 and -27 degrees was used to match the Villa Elisa survey'​s zero-level with that of the DRAO 1.4 GHz linear polarization survey.+The Villa Elisa 30-m telescope was used to map the southern sky simultaneously in continuum and linear polarization,​ yielding a fully sampled map of the 21cm linearly polarized emission for declinations between -10 and -90 degrees. Data in the overlap region between -10 and -27 degrees was used to match the Villa Elisa survey'​s zero-level with that of the DRAO 1.4 GHz linear polarization survey.\\ 
 + 
 +Healpix maps made by D. Paradis
  
 === Reference ​ for the 22 MHz survey === === Reference ​ for the 22 MHz survey ===
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   * 'An absolutely calibrated survey of polarized emission from the northern sky at 1.4 GHz. Observations and data reduction'​ by Wolleben, M. et al. 2006, A&A, 448, 411 http://​adsabs.harvard.edu/​abs/​2006A%26A...448..411W ​   * 'An absolutely calibrated survey of polarized emission from the northern sky at 1.4 GHz. Observations and data reduction'​ by Wolleben, M. et al. 2006, A&A, 448, 411 http://​adsabs.harvard.edu/​abs/​2006A%26A...448..411W ​
   * 'A fully sampled λ21 cm linear polarization survey of the southern sky' by Testori, J. et al. 2008, A&A, 484, 733 http://​adsabs.harvard.edu/​abs/​2008A%26A...484..733T ​   * 'A fully sampled λ21 cm linear polarization survey of the southern sky' by Testori, J. et al. 2008, A&A, 484, 733 http://​adsabs.harvard.edu/​abs/​2008A%26A...484..733T ​
 +<​html>​
 +<script src="​lib/​scripts/​aladin-btns.js"></​script>​
 +<​script>​
 +// Broadcasts a table given a hub connection.
 +var drao22mhz = function(connection) {
 +    var msg = new samp.Message("​image.load.fits",​
 +    {"​url":​ "​http://​cade.irap.omp.eu/​documents/​Ancillary/​DRAO/​DRAO_22MHz_1_256.fits","​name":"​DRAO 22MHz"​} );
 +    connection.notifyAll([msg]);​
 +};
 +var draopolu= function(connection) {
 +    var msg = new samp.Message("​image.load.fits",​
 +    {"​url":​ "​http://​cade.irap.omp.eu/​documents/​Ancillary/​DRAO/​DRAO_VillaElisa_21cm_POLU_1_256.fits","​name":"​DRAO+Villa Elisa 21cm POLU"} );
 +    connection.notifyAll([msg]);​
 +};
 +var draopolq= function(connection) {
 +    var msg = new samp.Message("​image.load.fits",​
 +    {"​url":​ "​http://​cade.irap.omp.eu/​documents/​Ancillary/​DRAO/​DRAO_VillaElisa_21cm_POLQ_1_256.fits","​name":"​DRAO+Villa Elisa 21cm POLQ"} );
 +    connection.notifyAll([msg]);​
 +};
 +
 +</​script>​
 +</​html>​
 +
 +
  
 ^  __**DRAO 22 MHz**__ ​ ^  __**DRAO+Villa Elisa 1.4 GHz POLU**__ ​ ^  __**DRAO+Villa Elisa 1.4 GHz POLQ**__ ​ ^ ^  __**DRAO 22 MHz**__ ​ ^  __**DRAO+Villa Elisa 1.4 GHz POLU**__ ​ ^  __**DRAO+Villa Elisa 1.4 GHz POLQ**__ ​ ^
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 <div id="​aladin-lite-div-draopolq"​ class="​aladin-lite-container200"></​div>​ <div id="​aladin-lite-div-draopolq"​ class="​aladin-lite-container200"></​div>​
 </​html> ​ | </​html> ​ |
 +
 +
 +=== Maps ===
 +
 +- 22 MHz : [[http://​cade.irap.omp.eu/​documents/​Ancillary/​DRAO/​DRAO_22MHz_1_256.fits| DRAO_22MHz_1_256.fits]]<​html>​
 +<button class="​aladin-btn"​ type="​button"​ onclick="​connector.runWithConnection(drao22mhz)">​Aladin</​button>​
 +</​html>​
 +
 +- 1.4 GHz POLU : [[http://​cade.irap.omp.eu/​documents/​Ancillary/​DRAO/​DRAO_VillaElisa_21cm_POLU_1_256.fits| DRAO_VillaElisa_21cm_POLU_1_256.fits]]<​html>​
 +<button class="​aladin-btn"​ type="​button"​ onclick="​connector.runWithConnection(draopolu)">​Aladin</​button>​
 +</​html>​
 +
 +- 1.4 GHz POLQ : [[http://​cade.irap.omp.eu/​documents/​Ancillary/​DRAO/​DRAO_VillaElisa_21cm_POLQ_1_256.fits| DRAO_VillaElisa_21cm_POLQ_1_256.fits]]<​html>​
 +<button class="​aladin-btn"​ type="​button"​ onclick="​connector.runWithConnection(draopolq)">​Aladin</​button>​
 +</​html>​
  
 <​html>​ <​html>​
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 </​html>​ </​html>​
  
 +=== HiPS=== ​
  
-=== Maps === +DRAO HiPS are available in Aladin ​Collections/Image
- +
-- 22 MHz : [[http://​cade.irap.omp.eu/​documents/​Ancillary/​DRAO/​DRAO_22MHz_1_256.fits| DRAO_22MHz_1_256.fits]] +
-<​html>​ +
-<button class="​aladin-btn"​ type="​button"​ onclick="​connector.runWithConnection(drao22mhz)">​Aladin</​button>​ +
-</​html>​ +
- +
-- 1.4 GHz POLU : [[http://​cade.irap.omp.eu/​documents/​Ancillary/​DRAO/​DRAO_VillaElisa_21cm_POLU_1_256.fits| DRAO_VillaElisa_21cm_POLU_1_256.fits]] +
- +
-- 1.4 GHz POLQ : [[http://​cade.irap.omp.eu/​documents/​Ancillary/​DRAO/DRAO_VillaElisa_21cm_POLQ_1_256.fits| DRAO_VillaElisa_21cm_POLQ_1_256.fits]] +
  
 === Original WCS data === === Original WCS data ===