LRD Watch DR1 · candidate
LRDW J123615.44+621521.4
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
- 1.97 BH* fit
- Spectral shape
- no labelled spectrum
- F444W
- 22.76 AB S/N 285, 0.16″ aperture
- F277W − F444W
- not in the colour lane
- BH* share
- 0.81 cliff_degraaff25; Δχ² galaxy 30.8, dwarf 4.6
- Compactness
- growth ratio 2.248 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* channelevidence dchi2_gal=30.8 dchi2_bd=4.6
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 | 1.9705 | bhstar:cliff_degraaff25 (zpub 2.37 noted) |
z_phot | Photometric (P(z) peak) | — | not fitted |
z_bhs | BH* channel fit | 1.970 | 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 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. |
|---|---|---|---|---|---|---|---|
| F115W | NIRCam wide | 1.154 | 465.56 | 7.67 | 24.73 | 60.7 | 1.33 |
| F182M | NIRCam medium | 1.845 | 1961.12 | 9.27 | 23.17 | 211.6 | 1.35–1.44 |
| F210M | NIRCam medium | 2.095 | 2351.34 | 12.11 | 22.97 | 194.2 | 1.37–1.46 |
| F356W | NIRCam wide | 3.568 | 2831.39 | 10.36 | 22.77 | 273.3 | 1.31–1.52 |
| F444W | NIRCam wide | 4.404 | 2861.91 | 10.04 | 22.76 | 285.1 | 1.51–1.58 |
| F560W | MIRI | 5.633 | 1533.35 | 6.43 | 23.44 | 238.4 | 2.51 |
| F770W | MIRI | 7.636 | 1108.62 | 5.76 | 23.79 | 192.3 | 2.35 |
| F1000W | MIRI | 9.947 | 606.95 | 9.14 | 24.44 | 66.4 | 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 J123615.44+621521.4.
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.