Radio observations of the fast transient MLS121106:014420+082311
ATel #4632; A. Horesh, A. Mahabal, G. Hallinan, K. Mooley, J. Carpenter, G. Djorgovski, A. Drake, R. Williams, M. Vallisneri, R. Vikram, C. Donalek, M. Graham, M. Yang (Caltech), S. B. Cenko (UC Berkeley), A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), T. Nagayama (Nagoya Univ), S. Barway (SAAO), G. Vianello (Stanford), D. Thompson (NASA), D. Kocevski (KIPAC), J. Chiang (Stanford), S. Larson, E. Christensen (LPL), S. Hodgkin (IoA, Cambridge)
on 9 Dec 2012; 19:22 UT
Credential Certification: Assaf Horesh (assafh@astro.caltech.edu)
Subjects: Radio, Transient
We observed the position of the unusual CRTS fast transient MLS121106:014420+082311 (Mahabal et al. ATel #4586, de Ugarte Postigo et al. ATEL #4589; Mahabal et al. ATEL #4605; Berger et al. ATEL #4619) using the Jansky VLA (JVLA), CARMA, and the OVRO 40m telescope. On 21 Nov 2012 (UT) the OVRO observation took place at 15 GHz. The CARMA observation was undertaken on 22 Nov 2012 (UT) at the 3-mm band (95 GHz) in the D array. The JVLA observation was performed on 02 Dec 2012 (UT) in C (6 GHz) and K (22 GHz) bands in the A array. There was no detection of the source by any of these telescopes. The detection limits (3 sigma) are <3 mJy in 15 GHz (OVRO), <0.45 mJy in the 3mm band (CARMA) and < 33 micro Jy and < 36 micro Jy in the C and K bands (JVLA), respectively. While the non-detection does not rule out an extra-galactic nature of the progenitor, it is more consistent with it being a galactic source.
We thank the JVLA, CARMA, and OVRO staff for their prompt approval and scheduling of our target-of-opportunity observations.
