The Astrophysical Journal Supplement Series (Jan 2024)
The JWST Resolved Stellar Populations Early Release Science Program. V. DOLPHOT Stellar Photometry for NIRCam and NIRISS
- Daniel R. Weisz,
- Andrew E. Dolphin,
- Alessandro Savino,
- Kristen B. W. McQuinn,
- Max J. B. Newman,
- Benjamin F. Williams,
- Nitya Kallivayalil,
- Jay Anderson,
- Martha L. Boyer,
- Matteo Correnti,
- Marla C. Geha,
- Karin M. Sandstrom,
- Andrew A. Cole,
- Jack T. Warfield,
- Evan D. Skillman,
- Roger E. Cohen,
- Rachael Beaton,
- Alessandro Bressan,
- Alberto Bolatto,
- Michael Boylan-Kolchin,
- Alyson M. Brooks,
- James S. Bullock,
- Charlie Conroy,
- Michael C. Cooper,
- Julianne J. Dalcanton,
- Aaron L. Dotter,
- Tobias K. Fritz,
- Christopher T. Garling,
- Mario Gennaro,
- Karoline M. Gilbert,
- Leo Girardi,
- Benjamin D. Johnson,
- L. Clifton Johnson,
- Jason Kalirai,
- Evan N. Kirby,
- Dustin Lang,
- Paola Marigo,
- Hannah Richstein,
- Edward F. Schlafly,
- Erik J. Tollerud,
- Andrew Wetzel
Affiliations
- Daniel R. Weisz
- ORCiD
- Department of Astronomy, University of California , Berkeley, CA 94720, USA ; [email protected]
- Andrew E. Dolphin
- ORCiD
- Raytheon , 1151 E. Hermans Road, Tucson, AZ 85756, USA; Steward Observatory, University of Arizona , 933 N. Cherry Avenue, Tucson, AZ 85719, USA
- Alessandro Savino
- ORCiD
- Department of Astronomy, University of California , Berkeley, CA 94720, USA ; [email protected]
- Kristen B. W. McQuinn
- ORCiD
- Department of Physics and Astronomy, Rutgers, the State University of New Jersey , 136 Frelinghuysen Road, Piscataway, NJ 08854, USA
- Max J. B. Newman
- ORCiD
- Department of Physics and Astronomy, Rutgers, the State University of New Jersey , 136 Frelinghuysen Road, Piscataway, NJ 08854, USA
- Benjamin F. Williams
- ORCiD
- Department of Astronomy, University of Washington , Box 351580, U.W., Seattle, WA 98195-1580, USA
- Nitya Kallivayalil
- ORCiD
- Department of Astronomy, University of Virginia , 530 McCormick Road, Charlottesville, VA 22904, USA
- Jay Anderson
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA
- Martha L. Boyer
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA
- Matteo Correnti
- ORCiD
- INAF Osservatorio Astronomico di Roma , Via Frascati 33, 00078, Monteporzio Catone, Rome, Italy; ASI-Space Science Data Center , Via del Politecnico, I-00133, Rome, Italy
- Marla C. Geha
- ORCiD
- Department of Astronomy, Yale University , New Haven, CT 06520, USA
- Karin M. Sandstrom
- ORCiD
- Department of Astronomy & Astrophysics, University of California San Diego , 9500 Gilman Drive, La Jolla, CA 92093, USA
- Andrew A. Cole
- ORCiD
- School of Natural Sciences, University of Tasmania , Private Bag 37, Hobart, Tasmania 7001, Australia
- Jack T. Warfield
- ORCiD
- Department of Astronomy, University of Virginia , 530 McCormick Road, Charlottesville, VA 22904, USA
- Evan D. Skillman
- ORCiD
- University of Minnesota , Minnesota Institute for Astrophysics, School of Physics and Astronomy, 116 Church Street, S.E., Minneapolis, MN 55455, USA
- Roger E. Cohen
- ORCiD
- Department of Physics and Astronomy, Rutgers, the State University of New Jersey , 136 Frelinghuysen Road, Piscataway, NJ 08854, USA
- Rachael Beaton
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA; Department of Astrophysical Sciences, Princeton University , 4 Ivy Lane, Princeton, NJ 08544, USA; The Observatories of the Carnegie Institution for Science , 813 Santa Barbara Street, Pasadena, CA 91101, USA
- Alessandro Bressan
- ORCiD
- SISSA , Via Bonomea 265, 34136 Trieste, Italy
- Alberto Bolatto
- ORCiD
- Department of Astronomy, University of Maryland , College Park, MD 20742, USA; Joint Space-Science Institute, University of Maryland , College Park, MD 20742, USA
- Michael Boylan-Kolchin
- ORCiD
- Department of Astronomy, The University of Texas at Austin , 2515 Speedway, Stop C1400, Austin, TX 78712-1205, USA
- Alyson M. Brooks
- ORCiD
- Department of Physics and Astronomy, Rutgers, the State University of New Jersey , 136 Frelinghuysen Road, Piscataway, NJ 08854, USA; Center for Computational Astrophysics , Flatiron Institute, 162 Fifth Avenue, New York, NY 10010, USA
- James S. Bullock
- ORCiD
- Department of Physics and Astronomy, University of California , Irvine, CA 92697, USA
- Charlie Conroy
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , Cambridge, MA 02138, USA
- Michael C. Cooper
- ORCiD
- Department of Physics and Astronomy, University of California , Irvine, CA 92697, USA
- Julianne J. Dalcanton
- ORCiD
- Department of Astronomy, University of Washington , Box 351580, U.W., Seattle, WA 98195-1580, USA; Center for Computational Astrophysics , Flatiron Institute, 162 Fifth Avenue, New York, NY 10010, USA
- Aaron L. Dotter
- ORCiD
- Department of Physics and Astronomy, Dartmouth College , 6127 Wilder Laboratory, Hanover, NH 03755, USA
- Tobias K. Fritz
- ORCiD
- Department of Astronomy, University of Virginia , Charlottesville, 530 McCormick Road, VA 22904-4325, USA
- Christopher T. Garling
- ORCiD
- Department of Astronomy, University of Virginia , 530 McCormick Road, Charlottesville, VA 22904, USA
- Mario Gennaro
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA; The William H. Miller III Department of Physics & Astronomy, Bloomberg Center for Physics and Astronomy, Johns Hopkins University , 3400 N. Charles Street, Baltimore, MD 21218, USA
- Karoline M. Gilbert
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA; The William H. Miller III Department of Physics & Astronomy, Bloomberg Center for Physics and Astronomy, Johns Hopkins University , 3400 N. Charles Street, Baltimore, MD 21218, USA
- Leo Girardi
- ORCiD
- Padova Astronomical Observatory , Vicolo dell’Osservatorio 5, Padova, Italy
- Benjamin D. Johnson
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , Cambridge, MA 02138, USA
- L. Clifton Johnson
- ORCiD
- Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA) and Department of Physics and Astronomy, Northwestern University , 1800 Sherman Avenue, Evanston, IL 60201, USA
- Jason Kalirai
- ORCiD
- John Hopkins Applied Physics Laboratory , 11100 Johns Hopkins Road, Laurel, MD 20723, USA
- Evan N. Kirby
- ORCiD
- Department of Physics, University of Notre Dame , Notre Dame, IN 46556, USA
- Dustin Lang
- ORCiD
- Perimeter Institute for Theoretical Physics , Waterloo, ON N2L 2Y5, Canada
- Paola Marigo
- ORCiD
- Department of Physics and Astronomy G. Galilei, University of Padova , Vicolo dell’Osservatorio 3, I-35122, Padova, Italy
- Hannah Richstein
- ORCiD
- Department of Astronomy, University of Virginia , 530 McCormick Road, Charlottesville, VA 22904, USA
- Edward F. Schlafly
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA
- Erik J. Tollerud
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA
- Andrew Wetzel
- ORCiD
- Department of Physics and Astronomy, University of California , Davis, CA 95616, USA
- DOI
- https://doi.org/10.3847/1538-4365/ad2600
- Journal volume & issue
-
Vol. 271,
no. 2
p. 47
Abstract
We present NIRCam and NIRISS modules for DOLPHOT, a widely used crowded-field stellar photometry package. We describe details of the modules including pixel masking, astrometric alignment, star finding, photometry, catalog creation, and artificial star tests. We tested these modules using NIRCam and NIRISS images of M92 (a Milky Way globular cluster), Draco II (an ultrafaint dwarf galaxy), and Wolf–Lundmark–Mellote (a star-forming dwarf galaxy). DOLPHOT’s photometry is highly precise, and the color–magnitude diagrams are deeper and have better definition than anticipated during original program design in 2017. The primary systematic uncertainties in DOLPHOT’s photometry arise from mismatches in the model and observed point-spread functions (PSFs) and aperture corrections, each contributing ≲0.01 mag to the photometric error budget. Version 1.2 of WebbPSF models, which include charge diffusion and interpixel capacitance effects, significantly reduced PSF-related uncertainties. We also observed minor (≲0.05 mag) chip-to-chip variations in NIRCam’s zero-points, which will be addressed by the JWST flux calibration program. Globular cluster observations are crucial for photometric calibration. Temporal variations in the photometry are generally ≲0.01 mag, although rare large misalignment events can introduce errors up to 0.08 mag. We provide recommended DOLPHOT parameters, guidelines for photometric reduction, and advice for improved observing strategies. Our Early Release Science DOLPHOT data products are available on MAST, complemented by comprehensive online documentation and tutorials for using DOLPHOT with JWST imaging data.
Keywords
