LRD Watch DR1 · candidate
LRDW J024014.33-013907.6
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 F090W, F150W, 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
- Redshift
- 6.42 BH* fit
- Spectral shape
- no labelled spectrum
- F444W
- 24.51 AB S/N 336, 0.16″ aperture
- F277W − F444W
- not in the colour lane
- BH* share
- 0.94 bhs_bb5400_b4; Δχ² galaxy 61.1, dwarf 15.2
- Compactness
- growth ratio 1.765 stars 2.384
- Balmer break
- 2.19 ± 0.16 F300M/F250M, 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 | 6.4160 | bhstar:bhs_bb5400_b4 |
z_phot | Photometric (P(z) peak) | — | not fitted |
z_bhs | BH* channel fit | 6.416 | bhs_bb5400_b4 |
z_agn | Colour-lane fit | — | — |
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 4 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. |
|---|---|---|---|---|---|---|---|
| F115W | NIRCam wide | 1.154 | 30.89 | 5.52 | 27.68 | 5.6 | 1.33 |
| F162M | NIRCam medium | 1.627 | 34.53 | 8.07 | 27.55 | 4.3 | 1.32 |
| F164N | NIRCam wide | 1.645 | 211.21 | 79.51 | 25.59 | 2.7 | 1.27 |
| F210M | NIRCam medium | 2.095 | 42.63 | 7.92 | 27.33 | 5.4 | 1.36 |
| F250M | NIRCam medium | 2.504 | 52.72 | 3.62 | 27.09 | 14.6 | 1.44 |
| F277W | NIRCam wide | 2.762 | 89.92 | 1.24 | 26.52 | 72.5 | 1.47 |
| F300M | NIRCam medium | 2.990 | 115.58 | 2.55 | 26.24 | 45.4 | 1.46 |
| F335M | NIRCam medium | 3.362 | 174.97 | 2.12 | 25.79 | 82.6 | 1.49 |
| F360M | NIRCam medium | 3.624 | 353.60 | 2.37 | 25.03 | 149.3 | 1.50 |
| F410M | NIRCam medium | 4.082 | 257.03 | 2.05 | 25.38 | 125.4 | 1.53 |
| F430M | NIRCam medium | 4.281 | 299.08 | 4.29 | 25.21 | 69.7 | 1.53 |
| F444W | NIRCam wide | 4.404 | 569.60 | 1.70 | 24.51 | 335.5 | 1.58 |
| F460M | NIRCam medium | 4.630 | 409.04 | 5.00 | 24.87 | 81.8 | 1.56 |
| F480M | NIRCam medium | 4.816 | 1536.57 | 6.19 | 23.43 | 248.2 | 1.57 |
Provenance
- Field
- Abell 370 (
a370x) - Programmes
01208, 03362, 06882behind every mosaic the field measured- Pipeline rows merged
- 1 all at one position
- Detection pass
- original
- Release build
33af9933d1cc2026-10-17T14:29:44Z
Image sources
| Band | Mosaic | Native pixel | Coverage |
|---|---|---|---|
| F115W | jw01208-o020_t001_nircam_clear-f115w_i2d.fits | 0.031″ | 0.66 |
| F277W | jw01208-o020_t001_nircam_clear-f277w_i2d.fits | 0.063″ | 1.00 |
| F410M | jw01208-o020_t001_nircam_clear-f410m_i2d.fits | 0.063″ | 1.00 |
| F444W | jw01208-o020_t001_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 J024014.33-013907.6.
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.