LRD Watch DR1 · candidate
LRDW J121215.41+273412.6
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 F115W, 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
- 5.62 colour-lane fit
- Spectral shape
- no labelled spectrum
- F444W
- 25.80 AB S/N 49, 0.16″ aperture
- F277W − F444W
- 1.13 mag strict redness
- BH* share
- 0.93 mom_naidu25; Δχ² galaxy 2.8, dwarf 30.3
- Compactness
- growth ratio 1.775 stars 2.503
- Balmer break
- 4.66 ± 1.52 F277W/F200W, 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
- BH* channelevidence dchi2_gal=2.8 dchi2_bd=30.3
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 | 5.6200 | z_agn |
z_phot | Photometric (P(z) peak) | — | not fitted |
z_bhs | BH* channel fit | 5.673 | mom_naidu25 |
z_agn | Colour-lane fit | 5.62 | AGN-inclusive templates |
Spectral checks
- V-shape (spectrum)
- no labelled spectrum
- Star (spectrum)
- no spectrum
- V-shape (photometry)
- not measurable βUV not measured, βopt 0.28 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. |
|---|---|---|---|---|---|---|---|
| F090W | NIRCam wide | 0.902 | 16.09 | 5.42 | 28.38 | 3.0 | 1.49 |
| F150W | NIRCam wide | 1.501 | 20.06 | 5.22 | 28.14 | 3.8 | 1.47 |
| F200W | NIRCam wide | 1.989 | 13.13 | 4.30 | 28.61 | 3.0 | 1.47 |
| F277W | NIRCam wide | 2.762 | 61.20 | 3.10 | 26.93 | 19.8 | 1.61 |
| F356W | NIRCam wide | 3.568 | 144.21 | 3.27 | 26.00 | 44.1 | 1.66 |
| F444W | NIRCam wide | 4.404 | 173.15 | 3.50 | 25.80 | 49.4 | 1.70 |
Provenance
- Field
- ClG J1212+2733 (
clg) - Programmes
01176behind 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 |
|---|---|---|---|
| F090W | jw01176-o271_t015_nircam_clear-f090w_i2d.fits | 0.031″ | 1.00 |
| F150W | jw01176-o271_t015_nircam_clear-f150w_i2d.fits | 0.031″ | 1.00 |
| F200W | jw01176-o271_t015_nircam_clear-f200w_i2d.fits | 0.031″ | 1.00 |
| F277W | jw01176-o271_t015_nircam_clear-f277w_i2d.fits | 0.063″ | 1.00 |
| F356W | jw01176-o271_t015_nircam_clear-f356w_i2d.fits | 0.063″ | 1.00 |
| F444W | jw01176-o271_t015_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 J121215.41+273412.6.
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.