The K correction
نویسندگان
چکیده
The K correction “corrects” for the fact that sources observed at different redshifts are, in general, compared with standards or each other at different rest-frame wavelengths. It is part of the relation between the emittedor rest-frame absolute magnitude of a source in one broad photometric bandpass to the observed-frame apparent magnitude of the same source in another broad bandpass. This short pedagogical paper provides definitions of and equations for the K correction.
منابع مشابه
The Functional Correction of Forward Shoulder Posture with Kinesiotape Improves Chest Mobility and Inspiratory Muscle Strength: A Randomized Controlled Trial
Background. Kinesiotape (K-tape) application can attenuate postural malalignment. However, the effects of K-tape on the changes in the respiratory system in postural problems remain unclear. Objectives. This study investigated the effects of 6-week functional correction with the K-tape on the forward shoulder posture (FSP) and respiratory function. Methods. A randomized clinical trial was per...
متن کاملCorrection to: An Ex vivo Analysis of Apical Transportation in Root Canals Prepared with BT Race Rotary and Hand K-Flexofile by Cone Beam Computed Tomography
Correction to: An Ex vivo Analysis of Apical Transportation in Root Canals Prepared with BT Race Rotary and Hand K-Flexofile by Cone Beam Computed Tomography Abbas Mesgarani1, Azadeh Zakariaie2, Azam Haddadi Kohsar1, Sina Haghanifar3, Jamshid Yazdani Charati4, Arman Ebrahimi5 1 Assistant Professor, Department of Endodontics, Faculty of Dentistry, Mazandaran University of Medical S...
متن کاملGENERALIZED JOINT HIGHER-RANK NUMERICAL RANGE
The rank-k numerical range has a close connection to the construction of quantum error correction code for a noisy quantum channel. For noisy quantum channel, a quantum error correcting code of dimension k exists if and only if the associated joint rank-k numerical range is non-empty. In this paper the notion of joint rank-k numerical range is generalized and some statements of [2011, Generaliz...
متن کاملA new approach to scatter correction in SPECT images based on Klein_Nishina equation
Introduction: Scattered photon is one of the main defects that degrade the quality and quantitative accuracy of nuclear medicine images. Accurate estimation of scatter in projection data of SPECT is computationally extremely demanding for activity distribution in uniform and non-uniform dense media. Methods: The objective of this paper is to develop and validate a scatter correction technique ...
متن کاملSurgical correction of urethral diverticulum in a female pseudo-hermaphrodite crossbred calf
A 40 kg crossbred calf of one month age was presented to the Institute Referral Polyclinic, with a history of dysuria, stranguria along with a fluctuant swelling in the mid-perineal region. On physical examination, a diverticulum was observed which on aspiration revealed urine. It was reported that urine outflow was from a tiny orifice at the proposed natural site of the vulva. Dissection of th...
متن کاملSimulation and patient studies of scatter correction in cardiac SPECT imaging
Introduction: Myocardial perfusion imaging is a nuclear medicine imaging method that is used to detect coronary artery diseases. One of the main sources of error in this imaging method is the detection of Compton scattered photons in the photopeak energy window used for data acquisition. This results in the degradation of the image contrast, and therefore decreases the...
متن کامل