Gaia in the UK

Taking the Galactic Census

Observe - Alerts archive

On this page you can find the list of all Gaia Alerts which were suitable for observing with a small telescope.

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 Decsort ascending Magnitude Classification Comment Desired follow-up School
Gaia16ajr 30 Mar 2016, 18:22 88.24821 -17.86224 16.87 unknown Candidate SN

This Alert isn't visible any more (as it is behind the Sun)

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

Gaia16agf 27 Feb 2016, 06:41 98.53741 -25.18462 17.03 SN Ia Candidate SN, GSTEC predicts young SN Ia at -16 days ECS
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.

Gaia18aen 17 Jan 2018, 04:16 120.71694 -30.31032 11.33 unknown bright emission line star in Galactic plane brightens by 1 magnitude

This is bright and in reach of modest telescopes - BUT only really observable from the Southern Hemisphere. We've no idea what this is - please monitor

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!

Gaia17bnk 13 Jun 2017, 01:14 95.65247 -38.56183 17.46 CV Candidate CV, 2mag rise in UV source GALEXASC J062236.61-383342.9, Gaia & CRTS have prior outbursts

We think this is a cataclysmic variable and we want to measure its orbital period. Continuous monitoring for 2 - 3 hours in a single filter (e.g. g or r) will show how the brightness varies with time and from that we can work out the binary period.


Gaia16afe 21 Feb 2016, 12:31 91.78404 -45.18118 18.86 SN I-pec SN candidate offset from galaxy ESO 254- G 019 (z=0.038917) by 18 arcsec

This was a peculiar thermonuclear supernova which is very far from its host galaxy.

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.

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.