PEARLS: 21 Transients Found in the Three-Epoch NIRCam Observations in the Continuous Viewing Zone of the James Webb Space Telescope
Haojing Yan, Bangzheng Sun, Zhiyuan Ma, Lifan Wang, Christopher N. A. Willmer, Wenlei Chen, Norman A. Grogin, John F. Beacom, S. P. Willner, Seth H. Cohen, Rogier A. Windhorst, Rolf A. Jansen, Cheng Cheng, Jia-Sheng Huang, Min Yun, Hansung B. Gim, Heidi B. Hammel

TL;DR
This study reports 21 transient detections in JWST NIRCam observations, confirming some as supernovae and highlighting the potential of JWST for future transient research with improved monitoring strategies.
Contribution
First identification of multiple transients in JWST NIRCam data, demonstrating its capabilities for transient science and suggesting optimal strategies for future surveys.
Findings
21 transients detected in JWST NIRCam data
Confirmed supernovae at z=1.63, z=2.64, and z=1.90
Potential for future long-term, multi-passband transient monitoring
Abstract
We present 21 transients from our three-epoch, four-band NIRCam observations covering 14.16 arcmin^2 in the Spitzer IRAC Dark Field (IDF), taken by the JWST Prime Extragalactic Areas for Reionization and Lensing Science program with a time cadence of ~6 months. A separate Hubble Space Telescope program provided Advanced Camera for Surveys optical imaging contemporaneous with the second and third epochs of the NIRCam observations. The NIRSpec spectroscopy on three transients confirmed a Type Ia supernova at z=1.63 and the host galaxies of the other two at z=2.64 and 1.90, respectively. Combining these with the photometric redshifts (z_ph) of the host galaxies in the rest of the sample, we find that the transients are in either a "mid-z" group at z>1.6 with M_V < -16.0 mag or a "low-z" group at z < 0.4 with M_H > -14.0 mag. The mid-z transients are consistent with supernovae. In contrast,…
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Taxonomy
TopicsCCD and CMOS Imaging Sensors · Calibration and Measurement Techniques · Infrared Target Detection Methodologies
