Gaia15agj in edge-on galaxy SDSS J095058.70+375758.8 confirmed by Mercator/Maia imaging
ATel #7615; R. I. Anderson (Physics and Astronomy Department, The Johns Hopkins University, Baltimore, MD, USA), L. Palaversa, N. Mowlavi, L. Eyer (Department of Astronomy, University of Geneva, Switzerland)
on 10 Jun 2015; 16:45 UT
Credential Certification: Lovro Palaversa (lovro.palaversa@unige.ch)
Subjects: Optical, Supernovae
Referred to by ATel #: 7623
We report confirmation of Gaia Science Alerts transient Gaia15agj, detected by Gaia satelite on 2015 Jun 03 ca. 05 UT. Images were obtained in U, G, and R bands of the Maia instrument mounted to the Flemish 1.2m Mercator telescope at Roque de los Muchachos observatory, La Palma, Canary Islands, Spain, on 2015 June 09 ca. 21UT.
Gaia15agj is located approximately 6.8 arcsec to the East (= 5.5 kpc for 0.806 kpc/arcsec from NED) of the center of edge-on galaxy SDSS J095058.70+375758.8 = FGC 0955 = GALEXASC J095059.00+375759.7 which has a redshift of z=0.04 (from NED). SIMBAD identifies this galaxy as Active Galactic Nucleus 2MFGC 7622.
Gaia15agj was measured at the apparent magnitudes listed in the table below. These translate to absolute magnitudes of approximately (-18.4, -19.21, -19.61) in U, G, and R bands, respectively, assuming Aλ of 0.076, 0.059, and 0.041 in the SDSS u, g, and r filters and distance modulus (m-M) = 36.11 +/- 0.15 mag (both from NED).
This new source is not present in archival 2MASS/DSS/SDSS images. The location of the transient off-center in an Sc galaxy renders it a likely supernova candidate.
MAIA G band 400x400 pixel cut-out image is provided (N is up, E is left and scale is 0.276"/pix).
| MJD |
Gaia15agj |
| Gaia detection |
Observed |
U |
G |
R |
| 57,176.2 |
57,182.9 |
~17.7 |
~16.9 |
~16.5 |
The photometric calibrations were obtained using the
Cambridge Photometric Calibration Server (CPCS), designed and maintained by Sergey Koposov and Lukasz Wyrzykowski.
