WASP: getting startedPeter Wheatley [email protected]
WASP: getting startedPeter Wheatley [email protected]
Mass-Radius Relation
Radius and inclination from
transits
Mass from inclination and radial velocity
WASP: getting startedPeter Wheatley [email protected]
LSST
WASP
Optics: sky coverage and depth
11cm aperture
16 CCDs
2.5% of sky
8m aperture - 750 CCDs – 0.02% of sky
1% of sky with 1 CCD
WASP: getting startedPeter Wheatley [email protected]
Survey Grasp
Aperture FOV Grasp
WASP 0.11m 8deg 0.77x16=12.4
INT-WFC 2.5m 0.5deg 1.6
VST 2.6m 1deg 6.8
WASP: getting startedPeter Wheatley [email protected]
INT
WASP
VST
Parameter Space
• For flat logN-logS, best to survey shallow and wide
• WASP will find the rare bright examples of variable objects
WASP: getting startedPeter Wheatley [email protected]
WASP: getting startedPeter Wheatley [email protected]
• WASP-N– Operated with 5 cameras
for 5 months in 2004– 2004 data reduced and
available in archive– Operations with 8
cameras due to begin in April 2006
• WASP-S– Operations recently
begun with 8 cameras
Status
WASP: getting startedPeter Wheatley [email protected]
Number of observations
Archive contents: August 2005
Archive contents: 11 Feb 2006
6,712,926 stars
Archive contents: 11 Feb 2006
6,712,926 stars; 12,791,907,925 observations
Archive contents: 11 Feb 2006
6,712,926 stars; 12,791,907,925 observations
WASP: getting startedPeter Wheatley [email protected]
WASP Archive• Designed and built by Richard West (Leicester)
– development on-going; issues of scaling and access times– documentation at http://www.wasp.le.ac.uk/archive/
• Archive use is a two stage process1. Search the catalogue for objects of interest2. Download and analyse light curves
• Access is via command-line-driven perl scripts– use of web-protocols to be firewall compatible
• Philosophy is avoid reinventing the wheel1. Data served as FITS files, so compatible with existing software2. Each user can use their favourite scripting language (e.g. IDL)3. Expect users to share analysis tools for common tasks4. Users can also share results via new database tables
Archive contents: 11 Feb 2006
6,712,926 stars pl_sky.qin
WASP: getting startedPeter Wheatley [email protected]
WASP: getting startedPeter Wheatley [email protected]
The WASP Archive
• User interface via perl scripts– wcatquery – filter database tables to select objects of interest– wlcextract – download light curves for selected objects
Bulk photometry
Catalogue database tables
Archive software
Remote user
Internet
Archive
WASP: getting startedPeter Wheatley [email protected]
wcatquery
> wcatquery –qryfile=filename.qry1SWASP J141609.92+512202.0 214.041369 51.367231 4.640000 11SWASP J152617.38+342009.5 231.572433 34.335994 4.650000 11SWASP J173055.37+310929.2 262.730717 31.158136 5.110000 11SWASP J165258.05+314206.0 253.241906 31.701675 5.180000 11SWASP J170136.36+333405.7 255.401503 33.568267 5.260000 11SWASP J170330.21+352450.5 255.875897 35.414053 5.460000 21SWASP J163102.78+351330.2 247.761597 35.225061 5.480000 51SWASP J113832.32+333733.0 174.634678 33.625833 5.520000 11SWASP J103330.91+345919.2 158.378794 34.988694 5.540000 21SWASP J153848.85+344030.1 234.703547 34.675039 5.570000 41SWASP J173608.10+281106.3 264.033756 28.185089 5.590000 21SWASP J165043.14+323313.2 252.679792 32.553667 5.610000 21SWASP J103752.26+340443.0 159.467772 34.078625 5.630000 11SWASP J173149.58+282426.9 262.956586 28.407494 5.650000 21SWASP J123347.41+332304.8 188.447561 33.384669 5.660000 11SWASP J174041.18+311714.9 265.171611 31.287483 5.730000 11SWASP J170217.10+315302.7 255.571286 31.884108 5.770000 21SWASP J172644.24+481536.2 261.684339 48.260064 5.770000 11SWASP J164351.68+340219.6 250.965361 34.038803 5.860000 21SWASP J103151.37+322246.3 157.964064 32.379553 5.860000 1
WASP: getting startedPeter Wheatley [email protected]
WASP Query Language (WQL)
# Example WQL query
# load database tables (main table available by default)
using photsummary
# select attributes to be returned
display obj_id, ra, declination, usno_rmag1, npts
# format for output file qdat/text/html
format text
# filters
filter npts > 0
filter usno_rmag1 < 10.0
WASP: getting startedPeter Wheatley [email protected]
Catalogue tablesPhotsummary (derived from WASP data)
Fieldnames
WASP: getting startedPeter Wheatley [email protected]
Catalogue tables
GCVS (cross-correlations)
Also Veron, ROSAT…
Analysis results…
WASP: getting startedPeter Wheatley [email protected]
wcatquery
> wcatquery –qryfile=filename.qry1SWASP J141609.92+512202.0 214.041369 51.367231 4.640000 11SWASP J152617.38+342009.5 231.572433 34.335994 4.650000 11SWASP J173055.37+310929.2 262.730717 31.158136 5.110000 11SWASP J165258.05+314206.0 253.241906 31.701675 5.180000 11SWASP J170136.36+333405.7 255.401503 33.568267 5.260000 11SWASP J170330.21+352450.5 255.875897 35.414053 5.460000 21SWASP J163102.78+351330.2 247.761597 35.225061 5.480000 51SWASP J113832.32+333733.0 174.634678 33.625833 5.520000 11SWASP J103330.91+345919.2 158.378794 34.988694 5.540000 21SWASP J153848.85+344030.1 234.703547 34.675039 5.570000 41SWASP J173608.10+281106.3 264.033756 28.185089 5.590000 21SWASP J165043.14+323313.2 252.679792 32.553667 5.610000 21SWASP J103752.26+340443.0 159.467772 34.078625 5.630000 11SWASP J173149.58+282426.9 262.956586 28.407494 5.650000 21SWASP J123347.41+332304.8 188.447561 33.384669 5.660000 11SWASP J174041.18+311714.9 265.171611 31.287483 5.730000 11SWASP J170217.10+315302.7 255.571286 31.884108 5.770000 21SWASP J172644.24+481536.2 261.684339 48.260064 5.770000 11SWASP J164351.68+340219.6 250.965361 34.038803 5.860000 21SWASP J103151.37+322246.3 157.964064 32.379553 5.860000 1
Archive contents: 11 Feb 2006
6,712,926 stars pl_sky.qin
WASP: getting startedPeter Wheatley [email protected]
Analysis tasks
• Individual light curves
• Variability selection
• Period searches
• Advanced/custom analysis
WASP: getting startedPeter Wheatley [email protected]
cone 220.5 31.1 0.005
cone 08h30m 45d15m30s 15s
cone "Her X-1" 0.25m
> wcatquery –qryfile=filename.qry1SWASP J165749.80+352032.8 254.457536 35.342456 13.880000 1072
> wlcextract –object=’1SWASP J165749.80+352032.8’
> ls
1SWASPJ165749.80+352032.8.fits
Individual objects
.
.
.
# filters
WASP: getting startedPeter Wheatley [email protected]
pl_lc.qin
pl_lc_nights.qin
pl_lomb.qin
pl_lomb.qin
pl_lfold.qin
WASP: getting startedPeter Wheatley [email protected]
Analysis tasks
• Individual light curves
• Variability selection
• Period searches
• Advanced/custom analysis
pl_sky.qin
pl_sky.qin
pl_sky.qin
pl_sky.qin
pl_sky.qin
WASP: getting startedPeter Wheatley [email protected]
wcatquery
display obj_id, ra, declination, usno_rmag1, \ npts, flux_mean, flux_chisq, blend_fraction
# filters
filter field = “SW1543+3126”
# remembering to load all necessary database tables
using photsummary, fieldnames
.
.
.
# select attributes to be returned
pl_chi_lc3.qin
WASP: getting startedPeter Wheatley [email protected]
Blend fraction < 6 % Blend fraction > 10 %pl_chi_lc3.qin
pl_chi_lc3.qin
pl_sky.qin
pl_chi_lc3.qin
pl_sky.qin
WASP: getting startedPeter Wheatley [email protected]
WASP: getting startedPeter Wheatley [email protected]
WASP: getting startedPeter Wheatley [email protected]
Analysis tasks
• Individual light curves
• Variability selection
• Period searches
• Advanced/custom analysis
WASP: getting startedPeter Wheatley [email protected]
1SWASPJ165749.80+352032.8.fits
1SWASPJ162340.13+352910.6.fits
1SWASPJ162406.56+344241.9.fits
1SWASPJ162531.70+335908.0.fits
1SWASPJ162700.83+324327.1.fits
1SWASPJ162721.01+345927.4.fits
1SWASPJ162814.75+345413.0.fits
1SWASPJ162826.61+320807.7.fits
1SWASPJ162829.56+343149.4.fits
1SWASPJ162929.13+341622.2.fits
1SWASPJ162946.59+281038.0.fits
1SWASPJ163018.58+342734.9.fits
1SWASPJ163137.18+343222.9.fits
. . .
Download light curves
> wcatquery –qryfile=filename.qry > filename.txt
> wlcextract –file=filename.txt
> ls
WASP: getting startedPeter Wheatley [email protected]
WASP: getting startedPeter Wheatley [email protected]
Analysis tasks
• Individual light curves
• Variability selection
• Period searches
• Advanced/custom analysis
WASP: getting startedPeter Wheatley [email protected]
Required tools
• wcatquery & wlcextract
• your favourite plotting software
• your favourite scripting language
WASP: getting startedPeter Wheatley [email protected]
Pulsating stars
Contact binariesEclipsing binaries
Pulsating stars
Advanced/custom analysis
Brett, West & Wheatley 2004MNRAS 353, 369
WASP: getting startedPeter Wheatley [email protected]
Conclusions
• Full set of 2004 data available in archive
• Can be analysed with simple tools and familiar software
• Philosophy – Borrow and share analysis tools– Return your results to archive
• Be aware of spurious variability associated with:– blending– ghost images– satellite trails– overlapping fields– and …?