LRD Watch DR1 · candidate
LRDW J131124.16-012204.4
Images
No image stamps: the mosaics this object was measured on are not on disk.
Spectral energy distribution
- NIRCam wide
- NIRCam medium
- 2σ upper limit (S/N < 2)
At a glance
- Tier
- SILVER main class
- Found by
- colour lane
- Redshift
- 1.20 colour-lane fit
- Spectral shape
- no labelled spectrum
- F444W
- 27.70 AB S/N 10, 0.16″ aperture
- F277W − F444W
- 2.17 mag strict redness
- BH* share
- not in the BH* channel
- Compactness
- FWHM 0.166″
- Balmer break
- not measured
- Image vetting
- half-stack pass; no flags raised
- Literature
- no published match within 1″
Vetting
- Image vettingpassed
- Half-stack testpass
- Artifact risknone
- Neighbournone
- Extendedno
- No vetting notes.
Redshifts
Each redshift keeps its own column. Photometric redshifts of little red dots are unreliable: against spectra, about a third of AGN-template redshifts (z_agn; 31 of 95 in the last purity run) and about half of galaxy-template redshifts at z > 3 were catastrophic outliers (methods Section 8).
| Column | What it is | z | Source |
|---|---|---|---|
z_spec | Spectroscopic, DJA grade 3 | — | — |
z_vet | Adopted by vetting | 1.2000 | z_agn |
z_phot | Photometric (P(z) peak) | 9.074 | 68%: 9.002–12.047 |
z_bhs | BH* channel fit | — | — |
z_agn | Colour-lane fit | 1.20 | AGN-inclusive templates |
Spectral checks
- V-shape (spectrum)
- no labelled spectrum
- Star (spectrum)
- no spectrum
- V-shape (photometry)
- not measurable βUV not measured, βopt not measured at z_agn
- Line in F410M
- none 0 line-free optical band(s)
- Line-ambiguous
- no
- Settling verdict
- not evaluated
Literature
Published objects within 1″ of this position. A match is a positional recovery, not an adopted classification.
- No published JWST little red dot or broad-line AGN within 1″.
Photometry
Circular aperture of radius 0.16″ at each band's native resolution, background from a 0.40–0.65″ annulus, programmes combined by inverse variance. For a point source multiply by the field's aperture correction (r = 0.16″ → 0.70″). Grey rows are below S/N 2.
| Band | Instrument | Pivot (µm) | f (nJy) | σ (nJy) | AB mag | S/N | Ap. corr. |
|---|---|---|---|---|---|---|---|
| F090W | NIRCam wide | 0.902 | 8.83 | 6.69 | 29.04 | 1.3 | 1.18 |
| F115W | NIRCam wide | 1.154 | 9.14 | 3.67 | 29.00 | 2.5 | 1.16 |
| F150W | NIRCam wide | 1.501 | 53.14 | 7.97 | 27.09 | 6.7 | 1.11–1.14 |
| F182M | NIRCam medium | 1.845 | 0.47 | 3.25 | 32.22 | 0.1 | 1.17 |
| F200W | NIRCam wide | 1.989 | 1.73 | 2.82 | 30.81 | 0.6 | 1.16 |
| F210M | NIRCam medium | 2.095 | 65.17 | 8.64 | 26.86 | 7.5 | 1.12 |
| F277W | NIRCam wide | 2.762 | 4.06 | 1.77 | 29.88 | 2.3 | 1.29 |
| F300M | NIRCam medium | 2.990 | −0.72 | 2.14 | — | −0.3 | 1.28 |
| F356W | NIRCam wide | 3.568 | 25.78 | 3.65 | 27.87 | 7.1 | 1.28–1.32 |
| F410M | NIRCam medium | 4.082 | 19.65 | 4.54 | 28.17 | 4.3 | 1.28 |
| F444W | NIRCam wide | 4.404 | 30.09 | 3.09 | 27.70 | 9.7 | 1.34 |
Provenance
- Field
- Abell 1689 (
a1689) - Programmes
05782, 06882behind every mosaic the field measured- Pipeline rows merged
- 2 all at one position
- Detection pass
- original
- Release build
33af9933d1cc2026-10-17T14:29:44Z
Cite
Anderson, Jordan (2026). LRD Watch DR1: little red dot candidates from an independent search of public JWST imaging (Version DR1) [Data set]. Cerin Amroth Research. Zenodo. https://doi.org/10.5281/zenodo.23062632 Object LRDW J131124.16-012204.4.
CC BY 4.0. Please also acknowledge the JWST programmes that took the data. LRD Watch DR1 is a vetted candidate catalogue, not a complete census: it has no selection function and cannot on its own give number densities. About the release.