The Table Access Protocol Service at HEASARC allow for simple geometric queries. For example, this query searches for observations in the rostmaster catalog within a circle of radius 1 degree of the coordinates (ra,dec)=(50,-85) -- i.e., basically a cone search -- and an exposure longer than 10000 seconds:
SELECT * FROM rosmaster WHERE exposure > 10000 and 1=CONTAINS(POINT('ICRS', ra, dec),CIRCLE('ICRS', 50, -85, 1)) The Table Access Protocol Service at HEASARC allow for simple geometric and cross-match queries. For example, this query searches for observations common to the rostmaster catalog AND the chanmaster catalog with a minimum exposure of 10ks.
SELECT * FROM rosmaster as ros INNER JOIN chanmaster as chan ON ros.name = chan.name WHERE ros.exposure > 10000 and chan.exposure > 10000 ORDER by ros.exposure
The Table Access Protocol Service at HEASARC allow for simple geometric queries. For example, this (slow) query searches for observations in the rostmaster catalog where a circle of radius 1 degree of the coordinates (ra,dec)=(50,-85) intersects with a circle of 1 degree radius around the center of the pointing:
SELECT * FROM rosmaster WHERE 1=INTERSECTS(CIRCLE('ICRS', ra, dec,1),CIRCLE('ICRS', 50, -85, 1)) The Table Access Protocol Service at HEASARC allow for simple geometric queries. For example, this query searches for observations in the rostmaster catalog where a pointing lies with a user-defined polygon, in this case a triangle with vertices (-5,-5), (5,-5), and (0,5)):
SELECT * FROM rosmaster WHERE exposure > 10000 AND 1=CONTAINS(POINT('ICRS', ra, dec),POLYGON('ICRS', -5, -5, 5, -5, 0, 5)) The Table Access Protocol Service at HEASARC allow for simple geometric queries. For example, this query computes the distance between rostmaster observations and a given point, selecting those observations near it, and ordering the result by that distance:
SELECT DISTANCE( POINT('ICRS', ra, dec), POINT('ICRS', 266.41683, -29.00781)) AS dist, * FROM rosmaster WHERE 1=CONTAINS( POINT('ICRS', ra, dec), CIRCLE('ICRS', 266.41683, -29.00781, 1)) ORDER BY dist ASC The Table Access Protocol Service at HEASARC allow for simple geometric queries. For example, this query searches for observations in the rostmaster catalog within a circle of radius 1 degree of the coordinates (ra,dec)=(50,-85) -- i.e., basically a cone search -- and an exposure longer than 10000 seconds:
SELECT * FROM rosmaster WHERE exposure > 10000 and 1=CONTAINS(POINT('ICRS', ra, dec),CIRCLE('ICRS', 50, -85, 1)) The Table Access Protocol Service at HEASARC allow for simple geometric and cross-match queries. For example, this query searches for observations common to the rostmaster catalog AND the chanmaster catalog with a minimum exposure of 10ks.
SELECT * FROM rosmaster as ros INNER JOIN chanmaster as chan ON ros.name = chan.name WHERE ros.exposure > 10000 and chan.exposure > 10000 ORDER by ros.exposure
The Table Access Protocol Service at HEASARC allow for simple geometric queries. For example, this (slow) query searches for observations in the rostmaster catalog where a circle of radius 1 degree of the coordinates (ra,dec)=(50,-85) intersects with a circle of 1 degree radius around the center of the pointing:
SELECT * FROM rosmaster WHERE 1=INTERSECTS(CIRCLE('ICRS', ra, dec,1),CIRCLE('ICRS', 50, -85, 1)) The Table Access Protocol Service at HEASARC allow for simple geometric queries. For example, this query searches for observations in the rostmaster catalog where a pointing lies with a user-defined polygon, in this case a triangle with vertices (-5,-5), (5,-5), and (0,5)):
SELECT * FROM rosmaster WHERE exposure > 10000 AND 1=CONTAINS(POINT('ICRS', ra, dec),POLYGON('ICRS', -5, -5, 5, -5, 0, 5)) The Table Access Protocol Service at HEASARC allow for simple geometric queries. For example, this query computes the distance between rostmaster observations and a given point, selecting those observations near it, and ordering the result by that distance:
SELECT DISTANCE( POINT('ICRS', ra, dec), POINT('ICRS', 266.41683, -29.00781)) AS dist, * FROM rosmaster WHERE 1=CONTAINS( POINT('ICRS', ra, dec), CIRCLE('ICRS', 266.41683, -29.00781, 1)) ORDER BY dist ASC These are examples for ADQL you can run in TAP services carrying
+ an ivoa.obscore table. See
+ ObsCore for the underlying
+ data model.
Suppose you read in an old amateur observer's log there was an unexpected +object on the night sky in the cold winter nights of the week between January +12th and 18th, 1903 – and now you would like to see whether there could +be an observation of such a thing.
+
+SELECT s_ra, s_dec, t_min FROM ivoa.obscore
+ WHERE t_min BETWEEN gavo_to_mjd('1903-01-12')
+ AND gavo_to_mjd('1903-01-19')
+
+ There is also a shortcut via user defined functions. As an extension +to regular ADQL, DaCHS lets you write gavo_simbadpoint('object') and replaces +the result with a position obtained from simbad, like this:
+
+SELECT access_url, t_exptime, t_min FROM ivoa.obscore
+ WHERE
+ t_min BETWEEN gavo_to_mjd('J2416128.5')
+ AND gavo_to_mjd('J2416133.5') AND
+ 1=CONTAINS(gavo_simbadpoint('Aldebaran'),
+ CIRCLE('ICRS', s_ra, s_dec, 15))
+
+