Serendipitous alerts
ABOUT
Welcome to the XMM-Newton serendipitously detected X-ray transient alerts page. You will find the latest transients to be detected by chance in the EPIC field of view, and for which the PI has given prior accord for this information to be made public. Please feel free to follow-up on any of these sources.
LATEST ALERTS
15
feb
2026
Coordinates: |
11:23:52.4 -59:20:48.0 |
|---|---|
| Time: | 03:00:49 |
| Exposure time: | 102050 s |
| Position Error: | 0.55" |
| Flux: | 7.8e-15 ± 1.6e-15 erg cm2 s-1 |
| EPIC detection maximum likelihood: | 110.2 |
| Hardness ratio: | -0.98 |
| Long term variability: | 6.7 |
| Simbad: | Star (Gaia DR2 5339171599114963968) |
| Spectral warning: | True |
| Alert type: | Low Flux State |
11
feb
2026
Coordinates: |
03:29:54.2 -27:17:23.4 |
|---|---|
| Time: | 08:48:16 |
| Exposure time: | 17415 s |
| Position Error: | 2.28" |
| Flux: | 2.0e-14 ± 2.3e-14 erg cm2 s-1 |
| EPIC detection maximum likelihood: | 17.7 |
| Hardness ratio: | 0.18 |
| Long term variability: | 6.0 |
| Simbad: | Unknown ([ECD2009] 52.47462-27.28886) |
| Spectral warning: | False |
| Alert type: | Past Variability |
07
feb
2026
Coordinates: |
05:23:46.3 -69:41:51.1 |
|---|---|
| Time: | 11:05:48 |
| Exposure time: | 45352 s |
| Position Error: | 0.95" |
| Flux: | 4.3e-14 ± 1.1e-14 erg cm2 s-1 |
| EPIC detection maximum likelihood: | 45.1 |
| Hardness ratio: | 0.91 |
| Long term variability: | 37.0 |
| Simbad: | Unknown (OGLE LMC-LPV-50288) |
| Spectral warning: | True |
| Alert type: | Past Variability |
14
jan
2026
Coordinates: |
12:29:22.8 +01:53:32.4 |
|---|---|
| Time: | 16:18:06 |
| Exposure time: | 66231 s |
| Position Error: | 0.82" |
| Flux: | 1.2e-13 ± 1.8e-14 erg cm2 s-1 |
| EPIC detection maximum likelihood: | 130.9 |
| Hardness ratio: | 0.98 |
| Long term variability: | 14.9 |
| Simbad: | Unknown (SDSS J122922.80+015330.7) |
| Spectral warning: | True |
| Alert type: | Past Variability |
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