LRD Watch DR1 · candidate
LRDW J142330.19+240817.6
Images
3.2″ across, north up, east left, resampled from the deepest mosaic covering the object in each band; ticks mark the catalogue position. Each band is stretched on its own noise; the composite shares one flux scale, so its colour is real. No coverage in F200W, F356W.
Spectral energy distribution
- NIRCam wide
- NIRCam medium
- 2σ upper limit (S/N < 2)
At a glance
- Tier
- SILVER main class
- Found by
- BH* channel + colour lane
- Redshift
- 5.36 colour-lane fit
- Spectral shape
- no labelled spectrum
- F444W
- 26.53 AB S/N 73, 0.16″ aperture
- F277W − F444W
- 1.52 mag strict redness
- BH* share
- 0.88 bhs_bb4200_b4; Δχ² galaxy 16.1, dwarf 58.6
- Compactness
- growth ratio 1.688 stars 2.394
- Balmer break
- 1.39 ± 0.49 F250M/F210M, clean
- 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 | 5.3600 | z_agn |
z_phot | Photometric (P(z) peak) | — | not fitted |
z_bhs | BH* channel fit | 5.431 | bhs_bb4200_b4 |
z_agn | Colour-lane fit | 5.36 | AGN-inclusive templates |
Spectral checks
- V-shape (spectrum)
- no labelled spectrum
- Star (spectrum)
- no spectrum
- V-shape (photometry)
- passes βUV −0.45, βopt 1.96 at z_agn
- Line in F410M
- Ha 1 line-free optical band(s)
- Line-ambiguous
- yes
- Settling verdict
- no extraction
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 | 7.06 | 2.89 | 29.28 | 2.5 | 1.28–1.32 |
| F115W | NIRCam wide | 1.154 | 8.37 | 2.33 | 29.09 | 3.6 | 1.26–1.34 |
| F140M | NIRCam medium | 1.405 | 12.86 | 4.70 | 28.63 | 2.7 | 1.25–1.29 |
| F150W | NIRCam wide | 1.501 | 10.69 | 2.35 | 28.83 | 4.5 | 1.26–1.34 |
| F162M | NIRCam medium | 1.627 | 20.97 | 4.25 | 28.10 | 4.9 | 1.25–1.33 |
| F182M | NIRCam medium | 1.845 | 7.99 | 3.05 | 29.14 | 2.6 | 1.27–1.34 |
| F210M | NIRCam medium | 2.095 | 10.97 | 2.95 | 28.80 | 3.7 | 1.31–1.40 |
| F250M | NIRCam medium | 2.504 | 15.24 | 3.42 | 28.44 | 4.5 | 1.37–1.43 |
| F277W | NIRCam wide | 2.762 | 21.80 | 0.95 | 28.05 | 23.0 | 1.40–1.48 |
| F300M | NIRCam medium | 2.990 | 30.65 | 2.13 | 27.68 | 14.4 | 1.41–1.47 |
| F335M | NIRCam medium | 3.362 | 45.35 | 1.52 | 27.26 | 29.8 | 1.44–1.53 |
| F360M | NIRCam medium | 3.624 | 38.35 | 1.55 | 27.44 | 24.8 | 1.46–1.53 |
| F410M | NIRCam medium | 4.082 | 124.52 | 1.97 | 26.16 | 63.3 | 1.51–1.57 |
| F444W | NIRCam wide | 4.404 | 88.40 | 1.21 | 26.53 | 72.8 | 1.52–1.61 |
Provenance
- Field
- MACS J1423.8+2404 (
macsj14238,macsj1423x) - Programmes
01208, 06882behind every mosaic the field measured- Pipeline rows merged
- 6 all at one position
- Detection pass
- original
- Release build
33af9933d1cc2026-10-17T14:29:44Z
Image sources
| Band | Mosaic | Native pixel | Coverage |
|---|---|---|---|
| F090W | jw01208-o032_t005_nircam_clear-f090w_i2d.fits | 0.031″ | 0.81 |
| F115W | jw01208-o032_t005_nircam_clear-f115w_i2d.fits | 0.031″ | 0.91 |
| F150W | jw01208-o032_t005_nircam_clear-f150w_i2d.fits | 0.031″ | 0.81 |
| F277W | jw01208-o032_t005_nircam_clear-f277w_i2d.fits | 0.063″ | 1.00 |
| F410M | jw01208-o032_t005_nircam_clear-f410m_i2d.fits | 0.063″ | 1.00 |
| F444W | jw01208-o032_t005_nircam_clear-f444w_i2d.fits | 0.063″ | 1.00 |
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 J142330.19+240817.6.
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.