Table · dataset · 2025
HE0435-1223 V and R light curves
Listed in IVOA Registry (Virtual Observatory)
We present monitoring observations of quasar microlensing in the quadruple quasar HE0435-1223.
Description
The microlensing-induced light curves of the quasar images are chromatic, i.e. they depend on the applied filter band. Comparison with microlensing simulations allows us to infer properties of the accretion disk.
We determine the R and V band light curves of the four images of HE0435-1223 from 79 and 80 epochs respectively, taken from 2014 to 2024 at the Las Cumbres Observatory using difference imaging analysis. We consider difference light curves to remove the intrinsic quasar variability. This reveals a prominent long-term chromatic microlensing event in image B. We use microlensing light curve simulations with both Gaussian and standard thin accretion disk brightness profiles to analyse this signal.
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The particularly strong signal observed in image B of HE0435-1223 makes it possible to detect a size ratio of the accretion disk in the R band compared to the V band of 1.24^+0.08^_-0.20_ and 1.42^+0.11^_-0.22_ for the Gaussian and the thin disk model, respectively. These values are in agreement with standard thin disk theory. For the absolute size we find large disk half-light radii of around 0.7 to 1.0 Einstein radii with an uncertainty of about 0.6dex (depending on the filter bands and the models).
Finally, our calculations show that image B undergoes caustic crossings about once per year.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/703/A250 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2025A&A...703A.250S ui.adsabs.harvard.edu/abs/2025A%26A...703A.250S ↗
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/a%2Ba/703/a250 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 72% · Image 75% · Imaging 75%
Provenance · 1 source records, 11 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/703/a250 | 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 (72%) |
| 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 | |
| concepts[modality].local:modality:image | enrichment · IVOA Registry | keyword-concept-rules@1.0.0 | title+description (75%) |
| concepts[modality].local:modality:imaging | enrichment · IVOA Registry | keyword-concept-rules@1.0.0 | title+description (75%) |
| 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 |