Skip to main content

Fabio Pasian

Follower

1

Following

2

Public Views

Now a senior scientist associated with INAF, Fabio has led several international enterprises, including the European archive of Hubble space telescope, and the Scientific Ground Segments of the ESA Planck/LFI and Euclid missions. Currently he is the Editor-in-Chief of the Elsevier "Astronomy and Computing" journal.

less

Christian Surace

Liceo Abate MOlina

Ester Piedipalumbo

Barbara Sartoris

carmelita carbone

Istituto Nazionale di Astrofisica

Elisabetta Majerotto

University of Paris

Centro de Estudios de Física del Cosmos de Aragón

Vanshika Kansal

CEA

Interests

Uploads

Papers by Fabio Pasian

Euclid: Cosmological forecasts from the void size function

Astronomy & Astrophysics

The Euclid mission – with its spectroscopic galaxy survey covering a sky area over 15 000 deg2 in... more The Euclid mission – with its spectroscopic galaxy survey covering a sky area over 15 000 deg2 in the redshift range 0.9 < z < 1.8 – will provide a sample of tens of thousands of cosmic voids. This paper thoroughly explores for the first time the constraining power of the void size function on the properties of dark energy (DE) from a survey mock catalogue, the official Euclid Flagship simulation. We identified voids in the Flagship light-cone, which closely matches the features of the upcoming Euclid spectroscopic data set. We modelled the void size function considering a state-of-the art methodology: we relied on the volume-conserving (Vdn) model, a modification of the popular Sheth & van de Weygaert model for void number counts, extended by means of a linear function of the large-scale galaxy bias. We found an excellent agreement between model predictions and measured mock void number counts. We computed updated forecasts for the Euclid mission on DE from the void size func...

ASTERICS: Addressing Cross-Cutting Synergies and Common Challenges for the Next Decade Astronomy Facilities

The large infrastructure projects for the next decade will allow a new quantum leap in terms of n... more The large infrastructure projects for the next decade will allow a new quantum leap in terms of new possible science. ESFRI, the European Strategy Forum on Research Infrastructures, a strategic initiative to develop the scientific integration of Europe, has identified four facilities (SKA, CTA, KM3Net and E-ELT) deserving priority in support. The ASTERICS project aims to address the cross-cutting synergies and common challenges shared by the various Astronomy ESFRI and other world-class facilities. The project (22 partners across Europe) is funded by the EU Horizon 2020 programme with 15 MEuro in 4 years. It brings together for the first time the astronomy, astrophysics and particle astrophysics communities, in addition to other related research infrastructures.

Grid Data Source Engine: Grid gateway to the Virtual Observatory

… and Systems XV, 2006

... Baruffolo2, Fabio ~ Leopoldo Benacchio2 Istituto Nazioriale di Astrofisica, 00136 Rome, Italy... more ... Baruffolo2, Fabio ~ Leopoldo Benacchio2 Istituto Nazioriale di Astrofisica, 00136 Rome, ItalyEdgardo Ambrosi, Antonia ... Catalog and the the archive of observational data from the Italian Galileo National ... X, ed. FR Harnden, Jr., FA Primini, &amp;amp; HE Payne (San Francisco: ASP), 160 ...

Euclid Preparation. XIV. The Complete Calibration of the Color–Redshift Relation (C3R2) Survey: Data Release 3

The Astrophysical Journal Supplement Series, 2021

The Complete Calibration of the Color–Redshift Relation (C3R2) survey is obtaining spectroscopic ... more The Complete Calibration of the Color–Redshift Relation (C3R2) survey is obtaining spectroscopic redshifts in order to map the relation between galaxy color and redshift to a depth of i ∼ 24.5 (AB). The primary goal is to enable sufficiently accurate photometric redshifts for Stage iv dark energy projects, particularly Euclid and the Nancy Grace Roman Space Telescope (Roman), which are designed to constrain cosmological parameters through weak lensing. We present 676 new high-confidence spectroscopic redshifts obtained by the C3R2 survey in the 2017B–2019B semesters using the DEIMOS, LRIS, and MOSFIRE multiobject spectrographs on the Keck telescopes. Combined with the 4454 redshifts previously published by this project, the C3R2 survey has now obtained and published 5130 high-quality galaxy spectra and redshifts. If we restrict consideration to only the 0.2 < z p < 2.6 range of interest for the Euclid cosmological goals, then with the current data release, C3R2 has increased t...

Planckintermediate results. XXII. Frequency dependence of thermal emission from Galactic dust in intensity and polarization

Astronomy & Astrophysics, 2015

Planck intermediate results. XXII. Frequency dependence of thermal emission from Galactic dust in... more

Euclid preparation

Astronomy & Astrophysics, 2019

We provide predictions of the yield of 7 < z < 9 quasars from the Euclid wide survey, upd... more We provide predictions of the yield of 7 < z < 9 quasars from the Euclid wide survey, updating the calculation presented in the Euclid Red Book in several ways. We account for revisions to the Euclid near-infrared filter wavelengths; we adopt steeper rates of decline of the quasar luminosity function (QLF; Φ) with redshift, Φ ∝ 10k(z − 6), k = −0.72, and a further steeper rate of decline, k = −0.92; we use better models of the contaminating populations (MLT dwarfs and compact early-type galaxies); and we make use of an improved Bayesian selection method, compared to the colour cuts used for the Red Book calculation, allowing the identification of fainter quasars, down to JAB ∼ 23. Quasars at z > 8 may be selected from Euclid OYJH photometry alone, but selection over the redshift interval 7 < z < 8 is greatly improved by the addition of z-band data from, e.g., Pan-STARRS and LSST. We calculate predicted quasar yields for the assumed values of the rate of decline o...

Euclid space mission: a cosmological challenge for the next 15 years

Proceedings of the International Astronomical Union, 2014

Euclid is the next ESA mission devoted to cosmology. It aims at observing most of the extragalact... more Euclid is the next ESA mission devoted to cosmology. It aims at observing most of the extragalactic sky, studying both gravitational lensing and clustering over ~15,000 square degrees. The mission is expected to be launched in year 2020 and to last six years. The sheer amount of data of different kinds, the variety of (un)known systematic effects and the complexity of measures require efforts both in sophisticated simulations and techniques of data analysis. We review the mission main characteristics, some aspects of the the survey and highlight some of the areas of interest to this meeting.

Planckintermediate results. XXVI. Optical identification and redshifts ofPlanckclusters with the RTT150 telescope

Astronomy & Astrophysics, 2015

Planck intermediate results. XXVI. Optical identification and redshifts of Planck clusters with t... more

Planck2013 results. VIII. HFI photometric calibration and mapmaking

Astronomy & Astrophysics, 2014

Planck2013 results. XX. Cosmology from Sunyaev–Zeldovich cluster counts

Astronomy & Astrophysics, 2014

We present constraints on cosmological parameters using number counts as a function of redshift f... more We present constraints on cosmological parameters using number counts as a function of redshift for a sub-sample of 189 galaxy clusters from the Planck SZ (PSZ) catalogue. The PSZ is selected through the signature of the Sunyaev-Zeldovich (SZ) effect, and the sub-sample used here has a signal-to-noise threshold of seven, with each object confirmed as a cluster and all but one with a redshift estimate. We discuss the completeness of the sample and our construction of a likelihood analysis. Using a relation between mass M and SZ signal Y calibrated to X-ray measurements, we derive constraints on the power spectrum amplitude σ 8 and matter density parameter Ω m in a flat ΛCDM model. We test the robustness of our estimates and find that possible biases in the Y-M relation and the halo mass function are larger than the statistical uncertainties from the cluster sample. Assuming the X-ray determined mass to be biased low relative to the true mass by between zero and 30%, motivated by comparison of the observed mass scaling relations to those from a set of numerical simulations, we find that σ 8 = 0.75 ± 0.03, Ω m = 0.29 ± 0.02, and σ 8 (Ω m /0.27) 0.3 = 0.764 ± 0.025. The value of σ 8 is degenerate with the mass bias; if the latter is fixed to a value of 20% (the central value from numerical simulations) we find σ 8 (Ω m /0.27) 0.3 = 0.78 ± 0.01 and a tighter one-dimensional range σ 8 = 0.77 ± 0.02. We find that the larger values of σ 8 and Ω m preferred by Planck's measurements of the primary CMB anisotropies can be accommodated by a mass bias of about 40%. Alternatively, consistency with the primary CMB constraints can be achieved by inclusion of processes that suppress power on small scales relative to the ΛCDM model, such as a component of massive neutrinos. We place our results in the context of other determinations of cosmological parameters, and discuss issues that need to be resolved in order to make further progress in this field.

D6.3: 1st Report on Data Interoperability: Findability and Interoperability

The EOSCpilot project is the first phase in the development of the European Open Science Cloud (E... more The EOSCpilot project is the first phase in the development of the European Open Science Cloud (EOSC). It aims to improve interoperability between European data infrastructures, enabling efficient means to discover, access and share data in a sustainable manner, which is also easy to implement. This document reports on the development of a set of guidelines to facilitate findability and reuse through a simple set of metadata properties that can be easily adopted, and that are applicable across scientific domains. We describe the process used in the identification of these properties, the properties themselves, and analyse how they relate to those properties proposed for use by other, comparable, international efforts. In addition, we describe the means by which these guidelines can be adopted, and list the demonstrators that are under consideration to validate them.

Evolving the VO: from interoperable data collections to an integrated system of services for data-intensive science

Communications of the Byurakan Astrophysical Observatory, 2020

The Virtual Observatory (VO) represents a successful international enterprise providing interoper... more The Virtual Observatory (VO) represents a successful international enterprise providing interoperability of data collections, thus allowing the possibility of multi-frequency and multi-messenger research. The Big Data era, that astrophysics has stepped into, is forcing scientists to perform data-intensive research. This new concept requires an evolution of the VO concept to provide additional services, in order to transform the VO: from sets of interoperable data to an integrated system of services capable of supporting data-intensive science.

VizieR Online Data Catalog: Planck Catalogue of Galactic cold clumps (PGCC) (Planck+, 2016)

Estimators of Ellipticity

Optimal filtering techniques for photograms

ABSTRACT

The Astronet documentation system

ABSTRACT

The ELSPEC/4 interactive spectra processing package

USSP, Version 1.0. User's guide

ABSTRACT

Objective prism plate analysis

ABSTRACT

Using U. L. D. A. in Internet: USPLIT

Euclid: Cosmological forecasts from the void size function

Astronomy & Astrophysics

The Euclid mission – with its spectroscopic galaxy survey covering a sky area over 15 000 deg2 in... more The Euclid mission – with its spectroscopic galaxy survey covering a sky area over 15 000 deg2 in the redshift range 0.9 < z < 1.8 – will provide a sample of tens of thousands of cosmic voids. This paper thoroughly explores for the first time the constraining power of the void size function on the properties of dark energy (DE) from a survey mock catalogue, the official Euclid Flagship simulation. We identified voids in the Flagship light-cone, which closely matches the features of the upcoming Euclid spectroscopic data set. We modelled the void size function considering a state-of-the art methodology: we relied on the volume-conserving (Vdn) model, a modification of the popular Sheth & van de Weygaert model for void number counts, extended by means of a linear function of the large-scale galaxy bias. We found an excellent agreement between model predictions and measured mock void number counts. We computed updated forecasts for the Euclid mission on DE from the void size func...

ASTERICS: Addressing Cross-Cutting Synergies and Common Challenges for the Next Decade Astronomy Facilities

The large infrastructure projects for the next decade will allow a new quantum leap in terms of n... more The large infrastructure projects for the next decade will allow a new quantum leap in terms of new possible science. ESFRI, the European Strategy Forum on Research Infrastructures, a strategic initiative to develop the scientific integration of Europe, has identified four facilities (SKA, CTA, KM3Net and E-ELT) deserving priority in support. The ASTERICS project aims to address the cross-cutting synergies and common challenges shared by the various Astronomy ESFRI and other world-class facilities. The project (22 partners across Europe) is funded by the EU Horizon 2020 programme with 15 MEuro in 4 years. It brings together for the first time the astronomy, astrophysics and particle astrophysics communities, in addition to other related research infrastructures.

Grid Data Source Engine: Grid gateway to the Virtual Observatory

… and Systems XV, 2006

... Baruffolo2, Fabio ~ Leopoldo Benacchio2 Istituto Nazioriale di Astrofisica, 00136 Rome, Italy... more ... Baruffolo2, Fabio ~ Leopoldo Benacchio2 Istituto Nazioriale di Astrofisica, 00136 Rome, ItalyEdgardo Ambrosi, Antonia ... Catalog and the the archive of observational data from the Italian Galileo National ... X, ed. FR Harnden, Jr., FA Primini, &amp;amp; HE Payne (San Francisco: ASP), 160 ...

Euclid Preparation. XIV. The Complete Calibration of the Color–Redshift Relation (C3R2) Survey: Data Release 3

The Astrophysical Journal Supplement Series, 2021

The Complete Calibration of the Color–Redshift Relation (C3R2) survey is obtaining spectroscopic ... more The Complete Calibration of the Color–Redshift Relation (C3R2) survey is obtaining spectroscopic redshifts in order to map the relation between galaxy color and redshift to a depth of i ∼ 24.5 (AB). The primary goal is to enable sufficiently accurate photometric redshifts for Stage iv dark energy projects, particularly Euclid and the Nancy Grace Roman Space Telescope (Roman), which are designed to constrain cosmological parameters through weak lensing. We present 676 new high-confidence spectroscopic redshifts obtained by the C3R2 survey in the 2017B–2019B semesters using the DEIMOS, LRIS, and MOSFIRE multiobject spectrographs on the Keck telescopes. Combined with the 4454 redshifts previously published by this project, the C3R2 survey has now obtained and published 5130 high-quality galaxy spectra and redshifts. If we restrict consideration to only the 0.2 < z p < 2.6 range of interest for the Euclid cosmological goals, then with the current data release, C3R2 has increased t...

Planckintermediate results. XXII. Frequency dependence of thermal emission from Galactic dust in intensity and polarization

Astronomy & Astrophysics, 2015

Planck intermediate results. XXII. Frequency dependence of thermal emission from Galactic dust in... more

Euclid preparation

Astronomy & Astrophysics, 2019

We provide predictions of the yield of 7 < z < 9 quasars from the Euclid wide survey, upd... more We provide predictions of the yield of 7 < z < 9 quasars from the Euclid wide survey, updating the calculation presented in the Euclid Red Book in several ways. We account for revisions to the Euclid near-infrared filter wavelengths; we adopt steeper rates of decline of the quasar luminosity function (QLF; Φ) with redshift, Φ ∝ 10k(z − 6), k = −0.72, and a further steeper rate of decline, k = −0.92; we use better models of the contaminating populations (MLT dwarfs and compact early-type galaxies); and we make use of an improved Bayesian selection method, compared to the colour cuts used for the Red Book calculation, allowing the identification of fainter quasars, down to JAB ∼ 23. Quasars at z > 8 may be selected from Euclid OYJH photometry alone, but selection over the redshift interval 7 < z < 8 is greatly improved by the addition of z-band data from, e.g., Pan-STARRS and LSST. We calculate predicted quasar yields for the assumed values of the rate of decline o...

Euclid space mission: a cosmological challenge for the next 15 years

Proceedings of the International Astronomical Union, 2014

Euclid is the next ESA mission devoted to cosmology. It aims at observing most of the extragalact... more Euclid is the next ESA mission devoted to cosmology. It aims at observing most of the extragalactic sky, studying both gravitational lensing and clustering over ~15,000 square degrees. The mission is expected to be launched in year 2020 and to last six years. The sheer amount of data of different kinds, the variety of (un)known systematic effects and the complexity of measures require efforts both in sophisticated simulations and techniques of data analysis. We review the mission main characteristics, some aspects of the the survey and highlight some of the areas of interest to this meeting.

Planckintermediate results. XXVI. Optical identification and redshifts ofPlanckclusters with the RTT150 telescope

Astronomy & Astrophysics, 2015

Planck intermediate results. XXVI. Optical identification and redshifts of Planck clusters with t... more

Planck2013 results. VIII. HFI photometric calibration and mapmaking

Astronomy & Astrophysics, 2014

Planck2013 results. XX. Cosmology from Sunyaev–Zeldovich cluster counts

Astronomy & Astrophysics, 2014

We present constraints on cosmological parameters using number counts as a function of redshift f... more We present constraints on cosmological parameters using number counts as a function of redshift for a sub-sample of 189 galaxy clusters from the Planck SZ (PSZ) catalogue. The PSZ is selected through the signature of the Sunyaev-Zeldovich (SZ) effect, and the sub-sample used here has a signal-to-noise threshold of seven, with each object confirmed as a cluster and all but one with a redshift estimate. We discuss the completeness of the sample and our construction of a likelihood analysis. Using a relation between mass M and SZ signal Y calibrated to X-ray measurements, we derive constraints on the power spectrum amplitude σ 8 and matter density parameter Ω m in a flat ΛCDM model. We test the robustness of our estimates and find that possible biases in the Y-M relation and the halo mass function are larger than the statistical uncertainties from the cluster sample. Assuming the X-ray determined mass to be biased low relative to the true mass by between zero and 30%, motivated by comparison of the observed mass scaling relations to those from a set of numerical simulations, we find that σ 8 = 0.75 ± 0.03, Ω m = 0.29 ± 0.02, and σ 8 (Ω m /0.27) 0.3 = 0.764 ± 0.025. The value of σ 8 is degenerate with the mass bias; if the latter is fixed to a value of 20% (the central value from numerical simulations) we find σ 8 (Ω m /0.27) 0.3 = 0.78 ± 0.01 and a tighter one-dimensional range σ 8 = 0.77 ± 0.02. We find that the larger values of σ 8 and Ω m preferred by Planck's measurements of the primary CMB anisotropies can be accommodated by a mass bias of about 40%. Alternatively, consistency with the primary CMB constraints can be achieved by inclusion of processes that suppress power on small scales relative to the ΛCDM model, such as a component of massive neutrinos. We place our results in the context of other determinations of cosmological parameters, and discuss issues that need to be resolved in order to make further progress in this field.

D6.3: 1st Report on Data Interoperability: Findability and Interoperability

The EOSCpilot project is the first phase in the development of the European Open Science Cloud (E... more The EOSCpilot project is the first phase in the development of the European Open Science Cloud (EOSC). It aims to improve interoperability between European data infrastructures, enabling efficient means to discover, access and share data in a sustainable manner, which is also easy to implement. This document reports on the development of a set of guidelines to facilitate findability and reuse through a simple set of metadata properties that can be easily adopted, and that are applicable across scientific domains. We describe the process used in the identification of these properties, the properties themselves, and analyse how they relate to those properties proposed for use by other, comparable, international efforts. In addition, we describe the means by which these guidelines can be adopted, and list the demonstrators that are under consideration to validate them.

Evolving the VO: from interoperable data collections to an integrated system of services for data-intensive science

Communications of the Byurakan Astrophysical Observatory, 2020

The Virtual Observatory (VO) represents a successful international enterprise providing interoper... more The Virtual Observatory (VO) represents a successful international enterprise providing interoperability of data collections, thus allowing the possibility of multi-frequency and multi-messenger research. The Big Data era, that astrophysics has stepped into, is forcing scientists to perform data-intensive research. This new concept requires an evolution of the VO concept to provide additional services, in order to transform the VO: from sets of interoperable data to an integrated system of services capable of supporting data-intensive science.

VizieR Online Data Catalog: Planck Catalogue of Galactic cold clumps (PGCC) (Planck+, 2016)

Estimators of Ellipticity

Optimal filtering techniques for photograms

ABSTRACT

The Astronet documentation system

ABSTRACT

The ELSPEC/4 interactive spectra processing package

USSP, Version 1.0. User's guide

ABSTRACT

Objective prism plate analysis

ABSTRACT

Using U. L. D. A. in Internet: USPLIT