Survey Requirements for Accurate and Precise Photometric Redshifts for Type Ia Supernovae

Abstract

In this paper we advance the simple analytic photometric redshift estimator for Type Ia supernovae (SNe Ia) proposed by Wang (2007), and use it to study simulated SN Ia data. We find that better than 0.5% accuracy in z_phot (with RMS[(z_phot-z_spec)/(1+z_spec)]<0.005) is possible for SNe Ia with well sampled lightcurves in three observed passbands (riz) with a signal-to-noise ratio of 25 at peak brightness, if the extinction by dust is negligible. The corresponding bias in z_phot (the mean of (z_phot-z_spec)) is 5.4\times 10^{-4}. If dust extinction is taken into consideration in the riz observer-frame lightcurves, the accuracy in z_phot deteriorates to 4.4%, with a bias in z_phot of 8.0\times 10^{-3}. Adding the g band lightcurve improves the accuracy in z_phot to 2.5%, and reduces the bias in z_phot to -1.5\times 10^{-3}. Our results have significant implications for the design of future photometric surveys of SNe Ia from both ground and space telescopes. Accurate and precise photometric redshifts boost the cosmological utility of such surveys.

arXiv comment11 pages, including 3 color figures. Typo in Eq.(7) corrected. Accepted for publication in MNRAS

References in corpus (15)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda and w from the First Year Data Set
• Improved Distances to Type Ia Supernovae with Multicolor Light Curve Shapes: MLCS2k2
• Using SN Ia Light Curve Shapes to Measure The Hubble Constant
• Correlated Fluctuations in Luminosity Distance and the (Surprising) Importance of Peculiar Motion in Supernova Surveys
• A Local Hubble Bubble from SNe Ia?
• Is there Evidence for a Hubble bubble? The Nature of Type Ia Supernova Colors and Dust in External Galaxies
• Hubble Diagrams of Type Ia Supernovae in the Near Infrared
• A Catalog of Color-based Redshift Estimates for z <~ 4 Galaxies in the Hubble Deep Field
• Large-Scale Bulk Motions Complicate the Hubble Diagram
• Supernova pencil beam survey
• Redshift Accuracy Requirements for Future Supernova and Number Count Surveys
• Implications of Cosmic Microwave Background Anisotropies for Large Scale Variations in Hubble's Constant
• A Model-Independent Photometric Redshift Estimator for Type Ia Supernovae

Cited by in corpus (13)

• Photometric SN Ia Candidates from the Three-Year SDSS-II SN Survey Data
• Spectroscopic Needs for Imaging Dark Energy Experiments: Photometric Redshift Training and Calibration
• Robust Machine Learning Applied to Astronomical Datasets III: Probabilistic Photometric Redshifts for Galaxies and Quasars in the SDSS and GALEX
• Photometric Estimates of Redshifts and Distance Moduli for Type Ia Supernovae
• Bayesian inference from photometric redshift surveys
• Sample variance in photometric redshift calibration: cosmological biases and survey requirements
• Photometric classification and redshift estimation of LSST Supernovae
• Galaxy Peculiar Velocities From Large-Scale Supernova Surveys as a Dark Energy Probe
• Utilizing Type Ia Supernovae in a Large, Fast, Imaging Survey to Constrain Dark Energy
• Detection and classification of supernovae beyond z~2 redshift with the James Webb Space Telescope
• Measuring Baryon Acoustic Oscillations with Millions of Supernovae
• Forecasting Supernova Observations with the CSST: I. Photometric Samples
• Lower bounds on photometric redshift errors from Type Ia supernovae templates