[vsnet-grb-info 22083] LIGO/Virgo S190425z: MMT Follow-Up Observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  24182
SUBJECT: LIGO/Virgo S190425z: MMT Follow-Up Observations
DATE:    19/04/25 14:26:34 GMT
FROM:    Griffin Hosseinzadeh at Harvard U  <griffin.hosseinzadeh at cfa.harvard.edu>

G. Hosseinzadeh, E. Berger, P. K. Blanchard, T. Eftekhari, J. Gill,
S. Gomez, L. Patton, V. A. Villar, P. K. G. Williams (Harvard U),
P. S. Cowperthwaite (Carnegie Obs), R. Chornock (Ohio U), W. Fong, 
R. Margutti (Northwestern U), and M. Nicholl (U Edinburgh) report:

We obtained 30 s g-band images of the following galaxies in the LIGO/Virgo
localization region of S190425z with the MMTCam instrument on the MMT 6.5-m
telescope:

Name              R.A.              Dec.        Date        UT
16545364-1657072  253.723525833333  -16.952021  2019-04-25  11:39:23.06
16571426-0613510  254.309417916667   -6.230837  2019-04-25  11:42:29.66
16520774-1703135  253.032287916667  -17.053755  2019-04-25  11:44:21.54
16590728-0544311  254.780334166667   -5.741986  2019-04-25  11:45:55.20
16580128-0149216  254.505370833333   -1.822693  2019-04-25  11:47:32.92
NGC6234           252.988937083333    4.383557  2019-04-25  11:49:28.05
59064             252.388167916667    6.016252  2019-04-25  11:51:21.12
59201             253.350372083333    4.23625   2019-04-25  11:52:39.44
16564688-0142052  254.195357916667   -1.701466  2019-04-25  11:54:11.67
UGC10426          247.709015         16.250687  2019-04-25  11:57:26.92
90265.0           254.36174         -10.191098  2019-04-25  11:59:13.75
NGC6225           252.08989           6.222765  2019-04-25  12:00:51.40
16462248+0902154  251.593704166667    9.037632  2019-04-25  12:02:05.10
16552449-0715255  253.852080833333   -7.25709   2019-04-25  12:04:56.52

Comparison of the images to the PS1 3pi survey (Chambers et al. 2016, 
arXiv:1612.05560) reveals no new sources brighter than ~21 mag.

We thank Mike Calkins and Ben Kunk at MMT for taking these observations.