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|Title:||Hyper: Hybrid photometry and extraction routine||Authors:||TRAFICANTE, ALESSIO
Fuller, G. A.
Pineda, J. E.
|Issue Date:||2015||Journal:||ASTRONOMY & ASTROPHYSICS||Number:||574||First Page:||A119||Abstract:||We present a new hybrid photometry and extraction routine called Hyper. It is designed to do compact source photometry, allowing for varying spatial resolution and sensitivity in multi-wavelength surveys. Hyper combines multi-Gaussian fitting with aperture photometry to provide reliable photometry in regions with variable backgrounds and in crowded fields. The background is evaluated and removed locally for each source using polynomial fits of various orders. Source deblending is done through simultaneous multi-Gaussian fitting of the main source and its companion(s), followed by the subtraction of the companion(s). Hyper also allows simultaneous multi-wavelength photometry by setting a fixed aperture size independent of the map resolution and by evaluating the source flux within the same region of the sky at multiple wavelengths at the same time. This new code has been initially designed for precise aperture photometry in complex fields such as the Galactic plane observed in the far infrared (FIR) by the Herschel infrared survey of the Galactic plane (Hi-GAL). Hyper has been tested on both simulated and real Herschel fields to quantify the quality of the source identification and photometry. The code is highly modular and fully parameterisable, therefore it can be easily adapted to different experiments. Comparison of the Hyper photometry with the catalogued sources in the Bolocam Galactic Plane Survey (BGPS), the 1.1 mm survey of the Galactic plane carried out with the Caltech Submillimeter Observatory, demonstrates the versatility of Hyper on different datasets. It is fast and light in its memory, and it is freely available to the scientific community.||Acknowledgments:||This research has made use of data from the Herschel Gould Belt Survey (HGBS) project ( http://gouldbelt-herschel.cea.fr ). The HGBS is a Herschel Key Programme jointly carried out by SPIRE Specialist Astronomy Group 3 (SAG 3), scientists of several institutes in the PACS Consortium (CEA Saclay, INAF-IFSI Rome and INAF-Arcetri, KU Leuven, MPIA Heidelberg), and scientists of the Herschel Science Center (HSC). The authors also want to thank the HGBS consortium for using the B1 Perseus map at PACS 70 m and to publish the Cutex and getsources fluxes in Table 8 . The authors want to thank Alexander Men’shchikov for having run getsources on a part of the B1 Perseus region. J.E.P. has received funding from the European Communitys Seventh Framework Programme (/FP7/20072013/) under grant agreement No 229517. A.T. wants to thank Maria del Mar Rubio Diez for the help during the test phase of the Hyper algorithm. A.T. is supported by STFC consolidated grant to JBCA.||URI:||http://hdl.handle.net/20.500.12386/23883||URL:||https://www.aanda.org/articles/aa/abs/2015/02/aa23254-13/aa23254-13.html||ISSN:||0004-6361||DOI:||10.1051/0004-6361/201323254||Bibcode ADS:||2015A&A...574A.119T||Fulltext:||open|
|Appears in Collections:||1.01 Articoli in rivista|
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checked on Jan 26, 2021
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