LRD Watch DR1 · candidate
LRDW J175312.48+651912.8
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, F115W, F200W, F410M.
Spectral energy distribution
- NIRCam wide
- 2σ upper limit (S/N < 2)
At a glance
- Tier
- SILVER main class
- Found by
- BH* channel + colour lane
- Redshift
- 0.80 colour-lane fit
- Spectral shape
- no labelled spectrum
- F444W
- 26.62 AB S/N 18, 0.16″ aperture
- F277W − F444W
- 1.75 mag strict redness
- BH* share
- 0.80 bhs_bb5400_b4; Δχ² galaxy 2.3, dwarf 0.0
- Compactness
- growth ratio 1.601 stars 1.710
- Balmer break
- 5.02 ± 0.78 F444W/F277W, red:Hb+OIII
- Image vetting
- half-stack fail; no flags raised
- Literature
- no published match within 1″
Vetting
- Image vettingpassed
- Half-stack testfail
- Artifact risknone
- Neighbournone
- Extendedno
- BH* channelevidence dchi2_gal=2.3 dchi2_bd=0.0
- BH* channelhalfstack-inconsistent F444W (h1 18.94σ / h2 18.69σ)
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 | 0.8000 | z_agn |
z_phot | Photometric (P(z) peak) | — | not fitted |
z_bhs | BH* channel fit | 8.049 | bhs_bb5400_b4 |
z_agn | Colour-lane fit | 0.80 | 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. |
|---|---|---|---|---|---|---|---|
| F150W | NIRCam wide | 1.501 | 17.49 | 4.59 | 28.29 | 3.8 | 1.11–1.11 |
| F277W | NIRCam wide | 2.762 | 16.27 | 2.38 | 28.37 | 6.8 | 1.21 |
| F356W | NIRCam wide | 3.568 | 41.94 | 6.33 | 27.34 | 6.6 | 1.23 |
| F444W | NIRCam wide | 4.404 | 81.60 | 4.52 | 26.62 | 18.1 | 1.27 |
Provenance
- Field
- NEXUS (
msacatalogdeepep9x) - Programmes
05105, 09263behind every mosaic the field measured- Pipeline rows merged
- 3 all at one position
- Detection pass
- original
- Release build
33af9933d1cc2026-10-17T14:29:44Z
Image sources
| Band | Mosaic | Native pixel | Coverage |
|---|---|---|---|
| F150W | jw09263-o001_t001_nircam_clear-f150w_i2d.fits | 0.031″ | 1.00 |
| F277W | jw09263-o007_t005_nircam_clear-f277w_i2d.fits | 0.063″ | 1.00 |
| F356W | jw05105-o014_t001_nircam_clear-f356w_i2d.fits | 0.063″ | 1.00 |
| F444W | jw05105-o014_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 J175312.48+651912.8.
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.