Observe - Alerts archive
Explanation of Alerts table
Alert ID: The name that was assigned to this Alert. Click on the link to see more information about the Alert.
Time: When Gaia first detected this Alert.
RA: The right ascension of the Alert (see Observing advice for more info).
Dec: The declination of the Alert.
Mag: The brightness of the Alert in Gaia magnitudes. For more information on magnitudes, see Observing advice. Note that a lower value for the magnitude means an Alert is brighter, and a higher value means it is fainter.
Classification: What sort of transient each Alert is.
Comment: Any additional information we have about why an alert is interesting, or information such as its distance.
Desired follow-up: Guidelines on what data we need from telescopes such as Faulkes for each Alert.
School: Initials of schools following-up this Alert (see Schools following-up Gaia Alerts).
Alert ID | Time | RA | Dec | Magnitude | Classification | Comment | Desired follow-up | School |
---|---|---|---|---|---|---|---|---|
Gaia16alt | 23 Apr 2016, 10:05 | 325.74996 | 66.19105 | 16.90 | YSO | 1.5 mag decline in YSO V* V350 Cep |
Young Stellar Objects (YSOs) sometimes have dips in brightness. We've seen such a dip in Gaia16alt, and we need ri imaging every two nights to confirm! |
|
Gaia17bnl | 12 Jun 2017, 22:47 | 312.75374 | 44.53049 | 16.48 | YSO | 1 mag dip in YSO V1701 Cyg |
Young star in the North American Nebula. Appears to fade because of dust in the local environment. Continuous observations preferred in two filters, e.g. V and I |
|
Gaia16bgk | 11 Sep 2016, 16:21 | 310.16636 | -54.31064 | 14.15 | SN Ia | candidate SN in NGC 6942 GS-TEC predicts SN Ia |
This is a nice nearby Type Ia SN, and it's bright too - mag~14.5. You should be able to spot this with a small telescope and a CCD camera. |
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Gaia16aye | 5 Aug 2016, 00:53 | 295.00474 | 30.13149 | 14.27 | ULENS | 1.2 mag rise in red star near Galactic Plane |
Gaia16aye is our favourite confirmed binary microlensing event. And it's still not over - so please continue observing while it declines back to 'normal' |
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Gaia18asi | 24 Mar 2018, 01:36 | 275.09139 | 7.18534 | 12.00 | XRB | bright outburst in Gaia source, aka ASASSN-18ey, aka MAXI J1820+070, candidate X-ray binary |
This was discovered first in the optical (by ASAS-SN) then in X-rays, and then we saw it brighten in Gaia. It's very likely to be an X-ray binary with a black hole at the centre. Continued photometric monitoring of this new system is encouraged - especially in a blue filter |
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Gaia17bej | 7 May 2017, 14:30 | 274.25440 | -31.38352 | 14.60 | ULENS | source towards Galactic Bulge brightens by 3 mags, candidate microlensing event |
Candidate microlensing event... or is it? We don't know. Observe it to help us find out! |
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Gaia16aza | 6 Aug 2016, 19:25 | 245.35763 | -26.77503 | 14.98 | unknown | bright blue hostless transient |
Our best guess is that this is a new Cataclsymic Variable. It's quite bright at 15th magnitude, and we request monitoring in blue and red filters (e.g. g and r). A spectrum would be great so we can try to understand if it's really a CV, or something even more exotic. |
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Gaia16aax | 26 Jan 2016, 15:55 | 218.57701 | 49.21014 | 18.33 | AGN | slowly rising transient in galaxy core |
The active galactic nucleus in the centre of this galaxy has started to fade again. It's now at magnitude ~19, so lets keep an eye on it: we need images in u, g, r and i filters about every two weeks. |
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Gaia18aod | 8 Mar 2018, 09:11 | 208.36495 | -67.41694 | 6.77 | Nova | confirmed Galactic Nova, extremely bright, aka Nova Circini 2018 (PNV J13532700-6725110) |
An opportunity to observe a really bright Galactic Nova. |
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Gaia16bef | 30 Aug 2016, 23:09 | 203.66082 | -23.68151 | 15.21 | SN Ia | confirmed SN Ia, found by ASAS: SN 2016eiy |
This is a bright Type Ia supernovae in a nearby galaxy! See if you can get some imaging of it - try ugri imaging every two nights, it's currently mag~16 |