The Sloan Digital Sky Survey Photometric System
This paper describes the Sloan Digital Sky Survey photometric system, a new five-color (u‧ g‧ r‧ i‧ z‧) wide-band CCD system with wavelength coverage from 3000 to 11 000 Å. The ...
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299 publications
The FIRST Survey: Faint Images of the Radio Sky at Twenty Centimeters
view Abstract Citations (2408) References (28) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The FIRST Survey: Faint Images of the Radio Sky a...
Naturalistic inquiry and the saturation concept: a research note
Saturation is mentioned in many qualitative research reports without any explanation of what it means and how it occurred. Recognizing the saturation point presents a challenge ...
An Illustration of a Pitfall in Estimating the Effects of Aggregate Variables on Micro Units
Many economic researchers have attempted to measure the effect of aggregate market or public policy variables on micro units by merging aggregate data with micro observations by...
Secondary standard stars for absolute spectrophotometry
view Abstract Citations (2379) References (6) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Secondary standard stars for absolute spectrophoto...
Taking Time Seriously: Time-Series-Cross-Section Analysis with a Binary Dependent Variable
Researchers typically analyze time-series-cross-section data with a binary dependent \nvariable (BTSCS) using ordinary logit or probit. However, BTSCS observations are \...
Association Between Administration of Systemic Corticosteroids and Mortality Among Critically Ill Patients With COVID-19
In this prospective meta-analysis of clinical trials of critically ill patients with COVID-19, administration of systemic corticosteroids, compared with usual care or placebo, w...
The Jackknife and the Bootstrap for General Stationary Observations
We extend the jackknife and the bootstrap method of estimating standard errors to the case where the observations form a general stationary sequence. We do not attempt a reducti...
The 2dF Galaxy Redshift Survey: spectra and redshifts
The 2dF Galaxy Redshift Survey (2dFGRS) is designed to measure redshifts for approximately 250 000 galaxies. This paper describes the survey design, the spectroscopic observatio...
The epithelial–mesenchymal transition: new insights in signaling, development, and disease
The conversion of an epithelial cell to a mesenchymal cell is critical to metazoan embryogenesis and a defining structural feature of organ development. Current interest in this...