LRD Watch DR1 · candidate
LRDW J123620.26+621454.7
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, F277W, F410M.
Spectral energy distribution
- NIRCam wide
- NIRCam medium
- MIRI
- 2σ upper limit (S/N < 2)
At a glance
- Tier
- SILVER z < 3 BH* class
- Found by
- BH* channel
- Redshift
- 2.02 spectroscopic
- Spectral shape
- no labelled spectrum
- F444W
- 23.01 AB S/N 259, 0.16″ aperture
- F277W − F444W
- not in the colour lane
- BH* share
- 0.82 cliff_degraaff25; Δχ² galaxy 10.5, dwarf −10.7
- Compactness
- growth ratio 2.202 stars 2.357
- 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
- BH* channeldwarf grid fits better (dchi2_bd=-10.7) but z_spec confirms
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 | 2.0250 | zspec:vizier_J_A+A_691_A240_jadesgnp.csv:36968 |
z_phot | Photometric (P(z) peak) | — | not fitted |
z_bhs | BH* channel fit | 1.565 | cliff_degraaff25 |
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 1 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 | 428.65 | 4.64 | 24.82 | 92.3 | 1.33 |
| F182M | NIRCam medium | 1.845 | 1356.88 | 7.72 | 23.57 | 175.8 | 1.35–1.44 |
| F210M | NIRCam medium | 2.095 | 1654.39 | 10.42 | 23.35 | 158.7 | 1.37–1.46 |
| F356W | NIRCam wide | 3.568 | 2246.17 | 7.14 | 23.02 | 314.7 | 1.31–1.52 |
| F444W | NIRCam wide | 4.404 | 2279.91 | 8.79 | 23.00 | 259.4 | 1.51–1.58 |
| F560W | MIRI | 5.633 | 1107.95 | 5.93 | 23.79 | 187.0 | 2.51 |
| F770W | MIRI | 7.636 | 727.50 | 5.95 | 24.25 | 122.4 | 2.35 |
| F1000W | MIRI | 9.947 | 482.42 | 9.27 | 24.69 | 52.0 | 2.63 |
Provenance
- Field
- GOODS-N (JADES 1181 with FRESCO, CONGRESS, GO 4762 and GO 6434) (
goods) - Programmes
01181, 01895, 02674, 02926, 03577, 04762, 05407, 06434behind 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 | jw03577-o002_t002_nircam_clear-f115w_i2d.fits | 0.031″ | 1.00 |
| F356W | jw03577-o002_t002_nircam_clear-f356w_i2d.fits | 0.063″ | 1.00 |
| F444W | jw01895-o002_t004_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 J123620.26+621454.7.
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.