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! |
|
| Gaia18bdx | 5 May 2018, 07:06 | 166.06666 | 50.03066 | 18.75 | SN II | candidate SN in outskirts of galaxy UGC 6129, rising | ECS | |
| 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. |
|
| 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 |
|
| Gaia16apd | 16 May 2016, 19:09 | 180.71544 | 44.25761 | 17.35 | SLSN | Blue transient on top of faint galaxy SDSS J120251.71+441527.4 |
This is a rare "superluminous supernova" from a exploding star. Unfortunately it's behind the Sun right now, so we can't follow it up! |
|
| Gaia16bic | 17 Sep 2016, 07:31 | 122.55712 | 33.95713 | 18.00 | SN II | candidate SN in grand design spiral galaxy NGC 2532 |
We don't know what type of SN this is yet, but it should be visible at mag~18 at the very end of the night. |
|
| 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' |
|
| Gaia16ada | 9 Feb 2016, 00:03 | 188.96784 | 27.93208 | 17.72 | SN imposter | transient near/in NGC4559C spatially coincident with candidate LBV with previous outbursts. |
A massive star seems to be undergoing a series of outbursts which we want to monitor. The outburst has faded, but lets keep an eye on it. We'll need a 300 second exposure with the LCOGT 1-m telescopes in the r filter, every month or so. CURRENTLY BEHIND THE SUN! |
|
| Gaia16ahw | 11 Mar 2016, 19:21 | 112.57248 | 25.03203 | 17.98 | SN Ia | Blue transient with faint host visible in SDSS aka SN 2016ayg |
This was a thermonuclear SN close to maximum brightness with magnitude. Now it's too faint to observe. |
|
| 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 |