[vsnet-grb-info 14441] Correction: MAXI J1421-613: Skynet PROMPT/R-COP observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  15755
SUBJECT: Correction: MAXI J1421-613: Skynet PROMPT/R-COP observations
DATE:    14/01/20 15:56:15 GMT
FROM:    Adam S. Trotter at UNC-Chapel Hill/PROMPT/Skynet  <atrotter at physics.unc.edu>

A. Trotter, D. Reichart, A. Verveer, T. Spuck, A. LaCluyze, J. Haislip, 
A. Foster, N. Frank, K. Ivarsen, J. Moore, M. Nysewander, R. Beauchemin, 
T. Berger, M. Carroll, H. T. Cromartie, R. Egger, M. Hinckle, A. 
Ireland, M. Maples, L. Scott, and J. A. Crain report:

In GCN 15753 (Trotter et al.), we mistakenly conflated the transient 
source MAXI J1421-613 (Baumgartner et al., GCN 15749, Swift trigger 
584155) with GRB 140118 (Krim et al., GCN 15748, Lien et al., GCN 15750, 
Swift trigger 584136). We regret the error, and thank our colleagues who 
pointed it out. A corrected version of our observing report follows:

Skynet observed the Swift-XRT localization of transient source MAXI 
J1421-613 (Baumgartner et al., GCN 15749, Swift trigger 584155) with one 
24" and four 14" telescopes of the PROMPT array at Cerro Tololo, Chile, 
with two 14" telescopes of the PROMPT array at Siding Spring, Australia, 
and with the 14" R-COP telescope at Perth Observatory, Australia.  
Observations began 86s after the trigger, simultaneously in the BVRI 
bands. We detect no uncatalogued optical source in the Swift-XRT error 
circle. In stacks of exposures, we obtain the following upper limits:
Mean Time   Band    Limit
10.8m       I       >19.6
14.9m       R       >19.1
11.7m       V       >19.8
14.9m       B       >19.1
6.94h       I       >17.3
7.10h       R       >16.9
6.02h       V       >20.4
6.04h       B       >20.4

Photometry is calibrated to five APASS-DR7 stars in the field, and has 
not been corrected for the extremely significant Galactic foreground 
extinction corresponding to E(B-V)=10.5 (Schlegel et al. 1998).

No further Skynet observations are scheduled.