2MASS Re-processing I: The Search for Faint Objects
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2026
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866915753467314176 |
|---|---|
| author | Liu, Zehao Peng, Xiyan Tang, Zhenghong Qi, Zhaoxiang Liao, Shilong Yu, Yong |
| author_facet | Liu, Zehao Peng, Xiyan Tang, Zhenghong Qi, Zhaoxiang Liao, Shilong Yu, Yong |
| contents | We present an automated, DAOFind-based pipeline developed to reprocess J-band Atlas All Sky Release Survey Images from the Two Micron All Sky Survey (2MASS). By optimizing the detection parameters and implementing a screening procedure that jointly evaluates the signal-to-noise ratio and central sharpness, the pipeline effectively identifies faint point sources that were previously undetected. Applying this method to eight representative sky regions improves the 2MASS detection limit from 16.20 to 16.60 mag and increases the number of detected point sources by approximately 21.36% relative to the 2MASS Point Source Catalog, with a false-positive rate of only 4.80%. These results demonstrate that the proposed reprocessing pipeline can substantially enhance the scientific yield of archival 2MASS data, providing valuable faint-source supplements for studies of time-domain variability, Galactic structure, and cold, low-luminosity objects. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_17831 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | 2MASS Re-processing I: The Search for Faint Objects Liu, Zehao Peng, Xiyan Tang, Zhenghong Qi, Zhaoxiang Liao, Shilong Yu, Yong Instrumentation and Methods for Astrophysics We present an automated, DAOFind-based pipeline developed to reprocess J-band Atlas All Sky Release Survey Images from the Two Micron All Sky Survey (2MASS). By optimizing the detection parameters and implementing a screening procedure that jointly evaluates the signal-to-noise ratio and central sharpness, the pipeline effectively identifies faint point sources that were previously undetected. Applying this method to eight representative sky regions improves the 2MASS detection limit from 16.20 to 16.60 mag and increases the number of detected point sources by approximately 21.36% relative to the 2MASS Point Source Catalog, with a false-positive rate of only 4.80%. These results demonstrate that the proposed reprocessing pipeline can substantially enhance the scientific yield of archival 2MASS data, providing valuable faint-source supplements for studies of time-domain variability, Galactic structure, and cold, low-luminosity objects. |
| title | 2MASS Re-processing I: The Search for Faint Objects |
| topic | Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2601.17831 |