Hello there!

In this webpage you will find information about myself, my research in Astronomy and more. I am currently looking for a postdoc position to start in 2024. Feel free to contact me!

Contact Me

Research

A brief summary of my academic experience

 
 
 
 
 

1-year internship at University of Washington (Doctorate)

Supervisor: prof. Željko Ivezić

2022 – Present Seattle, US
 
 
 
 
 

Doctorate program in Astronomy at Universidade de São Paulo

Supervisor: prof. Claudia Mendes de Oliveira (IAG-USP)

2018 – Present São Paulo, BR

Thesis title: “Classification and redshift estimation of new quasars in photometric surveys, using S-PLUS as study case”

Our object classifier is the current primary source to photometrically select stars, quasars or galaxies in S-PLUS DR2, DR3, and DR4. During these years, I had experience with querying, cross-matching and/or analyzing data from S-PLUS, SDSS, WISE, GAIA, GALEX, GAMA, and ALHAMBRA surveys. I have been working on this project since my first year of undergraduate in Astronomy (2014), being supervised by Prof. Nina T. S. Hirata from the Computer Science department of IME-USP at that time.

 
 
 
 
 

Proposal’s awarded observing time (PI)

2018 – 2018

With the goal of doing spectroscopic follow-up of quasar candidates, we were awarded:

  • 8 hours of observing time with SOAR telescope using Goodman spectrograph
  • 20 hours of observing time with GEMINI telescope using GMOS-S spectrograph
 
 
 
 
 

Undergraduate projects (Statistics)

2013 – 2013

During my final year, I worked on two projects coordinated by researchers in Medicine and in Archeology:

  • Analyses of the risk factors for mortality of patients after liver transplant
  • Classification of excavated stones from the archaeological site of Boqueirão da Pedra Furada: natural breakage or human-modified?

Accomplish­ments

Courses and workshops

Neural Networks and Deep Learning

Coursera 2020
See certificate

Improving Deep Neural Networks: Hyperparameter Tuning, Regularization and Optimization

Coursera 2020
See certificate

First School on Data Science and Machine Learning

ICTP-SAIFR 2019

Introduction to Deep Learning in Astronomy

IAG-USP 2019

Design and Evaluation of Extension Programs

IAG-USP 2019

Featured Publications

Nakazono et al.
MNRAS, 507, 5847-5868
This paper provides a catalogue of stars, quasars, and galaxies for S-PLUS DR2 in the Stripe 82 region. We show that narrow-band photometry improve the classification performance. Moreover, we show that our classification is robust against missing values. The catalogue with classification and probabilities for Stripe 82 S-PLUS DR2 is available for download.
DOI

List of peer-reviewed publications

(2022). Photometric redshifts for the S-PLUS Survey: Is machine learning up to the task?. Astronomy and Computing, 38, 100510.

DOI

(2022). Data Release 2 of S-PLUS: Accurate template-fitting based photometry covering 1000 deg2 in 12 optical filters. MNRAS, 511, 4590-4618.

DOI

(2021). On the discovery of stars, quasars, and galaxies in the Southern Hemisphere with S-PLUS DR2. MNRAS, 507, 5847-5868.

DOI

(2020). Assessing the photometric redshift precision of the S-PLUS survey: the Stripe-82 as a test-case. MNRAS, 499, 3884-3908.

DOI

(2020). The Southern Photometric Local Universe Survey (S-PLUS): improved SEDs, morphologies, and redshifts with 12 optical filters. MNRAS, 489, 241-267.

DOI

(2020). An Extremely Bright QSO at z = 2.89. The Astrophysical Journal, 99, 1, 76.

DOI

Gallery

Outreach activities and workshops

Contact

  • Rua do Matao 1226, Butanta, São Paulo (SP), Brazil, 05508-090. Office E-310.
  • Feel free to send me a message anytime!