Table · dataset · 2026
NGT optical monitoring of the blazar OJ 287
Listed in IVOA Registry (Virtual Observatory)
We present a comprehensive multiband optical monitoring and spectral analysis of the blazar OJ 287, conducted using the 1.26m National Astronomical Observatory-Guangzhou University Infrared/Optical telescope (NGT).
Description
During an intensive 17 day observational campaign from 2022 December to 2023 January, we obtained 2716 high-quality photometric observations (929 in the g band, 887 in the r band, and 900 in the i band). The data reveal significant variability across all bands.
Our main findings are as follows. (1) Significant magnitude variations were detected: {Delta}m_g_=0.945+/-0.048mag (g band), {Delta}m_r_=0.648+/-0.023mag (r band), and {Delta}m_i_=0.945+/-0.051mag (i band). (2) Numerous intraday variability (IDV) events were identified, with characteristic parameters ({Delta}m, {Delta}T, and VR={Delta}m/{Delta}T) showing consistent patterns between the g and r bands but distinct behavior in the i band.
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(3) Successful modeling of intraday light curves using a multi-Gaussian function, yielding brightening ({Delta}T_b_') and dimming ({Delta}T_d_') timescales, and revealing an average peak separation of {Delta}Tc=42.96+/-0.99 minutes that appears to be frequency independent. (4) Development of a novel radiation framework suggesting that the observed IDV phenomena originate from multiple components-with the frequency-independent variations attributable to the central black hole, while frequency-dependent variations stem from jet and accretion disk processes.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/281/44 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2025ApJS..281...44Y ui.adsabs.harvard.edu/abs/2025ApJS..281...44Y ↗
publication · from IVOA Registry
Catalogue records · 2
- VOResource record dc.g-vo.org/oai.xml?verb=GetRecord&metadataPrefix=ivo_vor&identifier=ivo%3… ↗
metadata API · from IVOA Registry
- Registry record (GAVO) dc.g-vo.org/I/cds.vizier/j/apjs/281/44 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 73%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/apjs/281/44 | 14 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].anzsrc:group:5101 | enrichment · IVOA Registry | taxonomy-embedding@1.1.0 | title+keywords+description (73%) |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:optical | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| description | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_description |
| license_text | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| publication_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| title | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_title |
| updated_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 |