The Sloan Digital Sky Survey-II Supernova Survey: Technical Summary

Abstract

The Sloan Digital Sky Survey-II (SDSS-II) has embarked on a multi-year project to identify and measure light curves for intermediate-redshift (0.05 < z < 0.35) Type Ia supernovae (SNe Ia) using repeated five-band (ugriz) imaging over an area of 300 sq. deg. The survey region is a stripe 2.5 degrees wide centered on the celestial equator in the Southern Galactic Cap that has been imaged numerous times in earlier years, enabling construction of a deep reference image for discovery of new objects. Supernova imaging observations are being acquired between 1 September and 30 November of 2005-7. During the first two seasons, each region was imaged on average every five nights. Spectroscopic follow-up observations to determine supernova type and redshift are carried out on a large number of telescopes. In its first two three-month seasons, the survey has discovered and measured light curves for 327 spectroscopically confirmed SNe Ia, 30 probable SNe Ia, 14 confirmed SNe Ib/c, 32 confirmed SNe II, plus a large number of photometrically identified SNe Ia, 94 of which have host-galaxy spectra taken so far. This paper provides an overview of the project and briefly describes the observations completed during the first two seasons of operation.

Submitted to The Astronomical Journal (24 pages, 10 figures)

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• Biases from Non-Simultaneous Regression with Correlated Covariates: A Case Study from Supernova Cosmology
• Linear growth of structure in projected massive gravity
• An Information Theory Approach on Deciding Spectroscopic Follow Ups
• Mass content of UGC 6446 and UGC 7524 through HI rotation curves: deriving the stellar discs from stellar population synthesis models
• The Friedmann equations in deformed Hořava-Lifshitz gravity and Debye model
• Observational Constraints on Phantom Crossing DGP Gravity
• Reconstructing galaxy fundamental distributions and scaling relations from photometric redshift surveys. Applications to the SDSS early-type sample
• Astronomical image time series classification using CONVolutional attENTION (ConvEntion)
• Spectral Signatures of Quasar Ages at z~3
• Forecasting Cosmological Constraints from the Weak Lensing Magnification of Type Ia Supernovae Measured by the Nancy Grace Roman Space Telescope
• New Constraints on Anisotropic Expansion from Supernovae Type Ia
• Photometric properties of intermediate redshift Type Ia Supernovae observed by SDSS-II Supernova Survey
• Effect of lensing magnification on type Ia supernova cosmology
• 1 um Excess Sources in the UKIDSS - I. Three T Dwarfs in the SDSS Southern Equatorial Stripe
• The snapshot distance method: estimating the distance to a Type Ia supernova from minimal observations
• An excess of low-mass X-ray binaries in the outer halo of NGC 4472
• AstroServ: Distributed Database for Serving Large-Scale Full Life-Cycle Astronomical Data
• Reconstructing the weak lensing magnification distribution of Type Ia supernovae
• Constraints on the birth of the universe and origin of cosmic dark flow
• Modified scaling in $k$-essence model in interacting dark energy - dark matter scenario
• Addressing type Ia supernova color variability with a linear spectral template
• SCONE: Supernova Classification with a Convolutional Neural Network
• Late time solutions for inhomogeneous Lambda-CDM cosmology, their characterization and observation
• Confronting Einstein Yang Mills Higgs Dark Energy in light of observations
• Efficient use of simultaneous multi-band observations for variable star analysis
• Dynamical analysis of $k$-essence cosmology in the light of Supernova Ia observations
• Physically motivated fit to mass surface density profiles observed in galaxies
• PISCOLA: a data-driven transient light-curve fitter
• A Study of Cataclysmic Variables from the eFEDS Survey