wasp getting started

WASP: getting startedPeter Wheatley [email protected]

WASP getting started


Horne 2006


Mass-Radius Relation

Radius and inclination from

transits

Mass from inclination and radial velocity


Aperture

Horne 2002


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


11cm aperture; f/1.816 CCDs; 1000 sqr deg


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


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-South

• 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


Star counts

Archive contents: August 2005


Number of observations

Archive contents: August 2005

Archive contents: 11 Feb 2006

6,712,926 stars


6,712,926 stars; 12,791,907,925 observations


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


6,712,926 stars pl_sky.qin


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


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 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


Catalogue tables

Root (available by default)


Catalogue tablesPhotsummary (derived from WASP data)

Fieldnames


Catalogue tables

GCVS (cross-correlations)

Also Veron, ROSAT…

Analysis results…


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


6,712,926 stars pl_sky.qin


Analysis tasks

• Individual light curves

• Variability selection

• Period searches

• Advanced/custom analysis


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


Her X-1

Flux2 Rmag~13.9

pl_lc_all.qin

pl_lc.qin

pl_lc_nights.qin

pl_lomb.qin

pl_lfold.qin


Analysis tasks



• Period searches


pl_sky.qin


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


Blend fraction < 6 % Blend fraction > 10 %pl_chi_lc3.qin


Ghost images

pl_chi_lc3.qin

pl_sky.qin


pl_chi_lc3.qin

pl_sky.qin


Analysis tasks



• Period searches



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


Beta Lyra

W UMa

Unknown


Analysis tasks



• Period searches



Required tools

• wcatquery & wlcextract

• your favourite plotting software

• your favourite scripting language


Pulsating stars

Contact binariesEclipsing binaries

Pulsating stars

Advanced/custom analysis

Brett, West & Wheatley 2004MNRAS 353, 369


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 …?

wasp getting started

Documents