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LSST Data Management Base Package
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ProperMotion.h
Go to the documentation of this file.
1// -*- LSST-C++ -*-
2/*
3 * This file is part of jointcal.
4 *
5 * Developed for the LSST Data Management System.
6 * This product includes software developed by the LSST Project
7 * (https://www.lsst.org).
8 * See the COPYRIGHT file at the top-level directory of this distribution
9 * for details of code ownership.
10 *
11 * This program is free software: you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation, either version 3 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program. If not, see <https://www.gnu.org/licenses/>.
23 */
24
25#ifndef LSST_JOINTCAL_PROPER_MOTION_H
26#define LSST_JOINTCAL_PROPER_MOTION_H
27
28#include <cmath> // atan2
29#include <iostream>
30#include <memory>
31
32namespace lsst {
33namespace jointcal {
34
35class Point;
36
46public:
47 ProperMotion(double ra, double dec, double raErr, double decErr, double raDecCov = 0)
48 : _ra(ra), _dec(dec), _raErr(raErr), _decErr(decErr), _raDecCov(raDecCov) {
49 _offsetBearing = atan2(dec, ra);
50 };
51
52 ProperMotion(ProperMotion const &) = default;
54 ProperMotion &operator=(ProperMotion const &) = default;
56 ~ProperMotion() = default;
57
68 Point apply(const Point& star, double timeDeltaYears) const;
69
70 friend std::ostream &operator<<(std::ostream &stream, ProperMotion const &pm);
71
72private:
73 // Proper motion in ra and dec. Units are radians/year
74 double _ra, _dec;
75 double _raErr, _decErr, _raDecCov;
76
77 // Cache the bearing along-which to offset.
78 double _offsetBearing;
79};
80} // namespace jointcal
81} // namespace lsst
82
83#endif // LSST_JOINTCAL_PROPER_MOTION_H
T atan2(T... args)
A point in a plane.
Definition Point.h:37
ProperMotion & operator=(ProperMotion &&)=default
Point apply(const Point &star, double timeDeltaYears) const
Apply proper motion correction to the input star, returning a star with PM-corrected coordinates.
ProperMotion(double ra, double dec, double raErr, double decErr, double raDecCov=0)
ProperMotion & operator=(ProperMotion const &)=default
ProperMotion(ProperMotion &&)=default
friend std::ostream & operator<<(std::ostream &stream, ProperMotion const &pm)
ProperMotion(ProperMotion const &)=default
T dec(T... args)