My research connects several important topics in the emerging era of big data astrophysics. We carry out population studies of active galaxies and explore questions such as how they have changed over the history of the Universe, utilizing observational data from ground and satellite-based surveys in visible light, radio waves, gamma rays, and other kinds of light. I am involved in several projects with external collaborators, including at NASA and the National Radio Astronomy Observatory, to explore the mystery of the diffuse radio background. We are also involved in exploring photometric redshift strategies for large-scale
Public Talk: The Light Our Eyes Can't See
University of Richmond Downtown, June 6, 2017
Presentation: CMB@50 Conference
Princeton University, June 10, 2015
Colloquium: Harvard Smithsonian Center for Astrophysics
Harvard University, February 11, 2016
“Waveband Luminosity Correlations in Flux-Limited
“The Radio Synchrotron Background: Conference Summary and Report.” J. Singal, J. Haider, M. Ajello, D. R. Ballantyne, E. Bunn, J. Condon, J. Dowell, D. Fixsen, N. Fornengo, B. Harms, G. Holder, E. Jones, K. Kellermann, A. Kogut, T. Linden, R. Monsalve, P. Mertsch, E. Murphy, E. Orlando, M. Regis, D. Scott, T. Vernstrom, & L. Xu, 2018, PASP, 130, 985
Analysis of a Custom Support Vector Machine for Photometric Redshift Estimation and the Inclusion of Galaxy Shape Information. E. Jones & J. Singal, 2017, A&A, 600, A113.
The Mid-Infrared Luminosity Evolution and Luminosity Function of Quasars with SDSS and WISE. J. Singal, J. George, and A. Gerber, 2016, ApJ, 831, 60
A Determination of the Gamma-ray Flux and Photon Spectral Index Distributions of Blazars from the Fermi-LAT 3LAC. J. Singal, 2015, MNRAS, 115, 122
Axial Ratio of Edge-On Spiral Galaxies as a Test For Bright Radio Halos. J. Singal, A. Kogut, E. Jones, and H. Dunlap, 2015, ApJL, 799, L10
Gamma-ray Luminosity and Photon Index Evolution of FSRQ Blazars and Contribution to the Gamma-ray Background. J. Singal, A. Ko, and V. Petrosian, 2014, ApJ, 786, 109
Geant4 Applications for Modeling Molecular Transport in Complex Vacuum Geometries. J. Singal, J. Langton, and R. Schindler, 2014, IJMSSC, 5, 2
Determination of the intrinsic Luminosity Time Correlation in the X-ray Afterglows of GRBs. M. Dainotti, V. Petrosian, J. Singal, and M. Ostrowski, 2013, ApJ, 774, 157
“The Radio and Optical Luminosity Evolution of Quasars II – The SDSS Sample.” J. Singal, V. Petrosian, L. Stawarz, and A. Lawrence, 2013, ApJ, 764, 43
“Flux and Photon Spectral Index Distributions of Fermi-LAT Blazars and Contribution to the Extragalactic Gamma-ray Background.” J. Singal, V. Petrosian, and M. Ajello, 2012, ApJ, 753, 45
“On The Radio and Optical Luminosity Evolution of Quasars.” J. Singal, V. Petrosian, A. Lawrence, and L. Stawarz, 2011, ApJ, 743, 104
“The Efficacy of Galaxy Shape Parameters in Photometric Redshift Estimation: A Neural Network Approach.” J. Singal, M. Shmakova, B. Gerke, and J. Lotz, 2011, PASP, 615, 621
“The ARCADE 2 Instrument.” J. Singal, D. Fixsen, A. Kogut, S. Levin, M. Limon, P. Lubin, P. Mirel, M. Seiffert, T. Villela, E. Wollack, and C.A. Wuensche, 2011, ApJ, 730, 138
“ARCADE 2 Measurement of the Absolute Sky Brightness at 3-90 GHz.” D. Fixsen, A. Kogut, S. Levin, M. Limon, P. Lubin, P. Mirel, M. Seiffert, J. Singal, T. Villela, E. Wollack, and C.A. Wuensche, 2011, ApJ, 734, 5
“ARCADE 2 Observations of Galactic Radio Emission.” A. Kogut, D. Fixsen, S. Levin, M. Limon, P. Lubin, P. Mirel, M. Seiffert, J. Singal, T. Villela, E. Wollack, and C.A. Wuensche, 2011, ApJ, 734, 4
“Interpretation of the ARCADE 2 Absolute Sky Brightness Measurement.” M. Seiffert, D. Fixsen, A. Kogut, S. Levin, M. Limon, P. Lubin, P. Mirel, J. Singal, T. Villela, E. Wollack, and C.A. Wuensche, 2011, ApJ, 734, 6
“Sources of the Radio Background Considered.” J. Singal, L. Stawarz, A. Lawrence, and V. Petrosian, 2010, MNRAS, 409, 1172
“The Cosmic Radio Background and AGN Connection.” J. Singal, L. Stawarz, A. Lawrence, and V. Petrosian, 2010, IJMPD, 19, 965
“A Multi-Chamber System for Analyzing the Outgassing, Deposition, and Associated Optical Degradation Properties of Materials in a Vacuum.” J. Singal, R. Schindler, C. Chang, P. Czodrowski, and P. Kim, 2010, Rev Sci Instrum, 81, 025101
“PHAT: Photo-z Accuracy Testing.” H. Hildebrandt, S. Arnouts, P. Capak, L. Moustakas, C. Wolf, F. Abdalla, R. Assef, M. Banerj, G. Brammer, S. Carliles, D. Coe, T. Dahlen, R. Feldmann, D. Gerdes, B. Gillis, R. Kotulla, I. Li, J.-M. Miralles, N. Purger, S. Schmidt, and J. Singal, 2010, A&A, 523, A31
CBS 6: Richmonder left mark on moon without ever leaving Earth
Sat., Jul. 20, 2019
WRVA Radio: From the Space Race to the Moon
Fri., Jul. 19, 2019
ABC News: Why the Apollo 11 moon landing conspiracy theories have endured despite being debunked numerous times
Thu., Jul. 18, 2019
ABC 8 News: UR physics professor talks Moon Landing legacy as 50th anniversary approaches
Fri., Jul. 5, 2019
The Collegian: Physics professor crowned champion at UR¿s first professor life raft debate
Wed., Apr. 17, 2019
CNN: What's next for NASA's Mars InSight lander?
Wed., Nov. 28, 2018
ABC 8 News: University of Richmond Professor talks all things eclipse
Thu., Aug. 17, 2017
KBND: Eclipse Eyewear Necessary For Central Oregonians
Thu., Jul. 27, 2017
