# LRDW J024015.91-013917.7 — Cerin Amroth Source: https://cerinamroth.com/jwst/lrds/dr1/j024015.91-013917.7/ [Home](https://cerinamroth.com/) › [JWST](https://cerinamroth.com/jwst/) › [Little red dots](https://cerinamroth.com/jwst/lrds/) › [LRD Watch DR1](https://cerinamroth.com/jwst/lrds/dr1/) › LRDW J024015.91-013917.7 LRD Watch DR1 · candidate # LRDW J024015.91-013917.7 candidate tableSILVERmain classcolour laneAbell 370 RA 02:40:15.912 40.0663009° Dec −01:39:17.71 -1.6549204° [SIMBAD within 2″](https://simbad.cds.unistra.fr/simbad/sim-coo?Coord=40.066301+-1.654920&Radius=2&Radius.unit=arcsec) · [ESASky](https://sky.esa.int/esasky/?target=40.066301%20-1.654920&fov=0.02&sci=true) ## Images F090W image, 3.2 arcsec across, north up F090W0.03″ px F115W image, 3.2 arcsec across, north up F115W0.03″ px F150W image, 3.2 arcsec across, north up F150W0.03″ px F277W image, 3.2 arcsec across, north up F277W0.06″ px F410M image, 3.2 arcsec across, north up F410M0.06″ px F444W image, 3.2 arcsec across, north up F444W0.06″ px 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 F200W, F356W. ## Spectral energy distribution - NIRCam wide - NIRCam medium - 2σ upper limit (S/N < 2) Aperture fluxes in a 0.16″-radius circle, not corrected to total; the values are in the photometry table below. The gold line marks the Balmer limit (3646 Å rest) at z = 5.620. ## At a glance TierSILVER main class Found bycolour lane Redshift5.62 colour-lane fit Spectral shapeno labelled spectrum F444W28.60 AB S/N 10, 0.16″ aperture F277W − F444W1.05 mag strict redness BH* sharenot in the BH* channel CompactnessFWHM 0.143″ Balmer break0.65 ± 0.28 F277W/F210M, clean Image vettinghalf-stack pass; no flags raised Literatureno 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 | 5.6200 | z_agn | `z_phot` | Photometric (P(z) peak) | — | not fitted | `z_bhs` | BH* channel fit | — | — | `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)fails βUV −0.86, βopt −0.08 at z_agn Line in F410Mnone 3 line-free optical band(s) Line-ambiguousno Settling verdictnot 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. | F070W | NIRCam wide | 0.704 | 1.11 | 3.79 | 31.29 | 0.3 | 1.30 | F090W | NIRCam wide | 0.902 | 2.48 | 2.20 | 30.41 | 1.1 | 1.31 | F115W | NIRCam wide | 1.154 | 5.31 | 2.32 | 29.59 | 2.3 | 1.33 | F140M | NIRCam medium | 1.405 | 8.13 | 4.44 | 29.12 | 1.8 | 1.32 | F150W | NIRCam wide | 1.501 | 7.17 | 1.99 | 29.26 | 3.6 | 1.34 | F162M | NIRCam medium | 1.627 | −2.57 | 4.35 | — | −0.6 | 1.32 | F164N | NIRCam wide | 1.645 | 15.74 | 33.60 | 28.41 | 0.5 | 1.27 | F182M | NIRCam medium | 1.845 | 4.16 | 2.46 | 29.85 | 1.7 | 1.35 | F187N | NIRCam wide | 1.874 | −21.12 | 31.28 | — | −0.7 | 1.23 | F210M | NIRCam medium | 2.095 | 7.71 | 2.83 | 29.18 | 2.7 | 1.36 | F250M | NIRCam medium | 2.504 | 3.53 | 3.63 | 30.03 | 1.0 | 1.44 | F277W | NIRCam wide | 2.762 | 5.00 | 1.10 | 29.65 | 4.5 | 1.47 | F300M | NIRCam medium | 2.990 | 3.17 | 2.27 | 30.15 | 1.4 | 1.46 | F335M | NIRCam medium | 3.362 | 20.89 | 1.77 | 28.10 | 11.8 | 1.49 | F360M | NIRCam medium | 3.624 | 3.65 | 1.57 | 30.00 | 2.3 | 1.50 | F410M | NIRCam medium | 4.082 | 8.77 | 1.66 | 29.04 | 5.3 | 1.53 | F430M | NIRCam medium | 4.281 | 21.27 | 3.55 | 28.08 | 6.0 | 1.53 | F444W | NIRCam wide | 4.404 | 13.16 | 1.28 | 28.60 | 10.3 | 1.58 | F460M | NIRCam medium | 4.630 | 1.88 | 4.34 | 30.71 | 0.4 | 1.56 | F480M | NIRCam medium | 4.816 | 3.01 | 4.07 | 30.20 | 0.7 | 1.57 ## Provenance FieldAbell 370 (`a370x`) Programmes`01208, 03362, 06882` behind every mosaic the field measured Pipeline rows merged2 all at one position Detection passoriginal Release build`33af9933d1cc` 2026-10-17T14:29:44Z ## Image sources | Band | Mosaic | Native pixel | Coverage | F090W | `jw01208-o020_t001_nircam_clear-f090w_i2d.fits` | 0.031″ | 1.00 | F115W | `jw01208-o020_t001_nircam_clear-f115w_i2d.fits` | 0.031″ | 1.00 | F150W | `jw01208-o020_t001_nircam_clear-f150w_i2d.fits` | 0.031″ | 1.00 | 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 J024015.91-013917.7. 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](https://cerinamroth.com/jwst/lrds/dr1/). [← LRDW J024014.33-013907.6](https://cerinamroth.com/jwst/lrds/dr1/j024014.33-013907.6/)[LRDW J024017.84-013813.0 →](https://cerinamroth.com/jwst/lrds/dr1/j024017.84-013813.0/)