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OGLE-IV Transient Search summary of season 2015b

ATel #8484; L. Wyrzykowski, Z. Kostrzewa-Rutkowska, J. Klencki, M. Sitek, P. Mroz, A. Udalski, S. Kozlowski, J. Skowron, R. Poleski, M. K. Szymanski, G. Pietrzynski, I. Soszynski, K. Ulaczyk, P. Pietrukowicz (Warsaw University Astronomical Observatory, Poland) on behalf of the OGLE team
on 31 Dec 2015; 15:21 UT
Credential Certification: Lukasz Wyrzykowski (wyrzykow@astrouw.edu.pl)

Subjects: Optical, Supernovae, Transient

Referred to by ATel #: 8485, 8486

The OGLE-IV Transient Detection System (Wyrzykowski et al. 2014, AcA,64,197; Kozlowski et al. 2013) in the 2015b transient observing season (from August) has been operating in dual mode: regular as in previous years (detections every couple of days based on at least two positive detections), and rapid (automatised detections within 15 mins after the single frame was taken, details in Klencki et al. in prep.). We report the the discovery of 145 new transients detected since Aug. 2015. Most of them appeared near or on top of apparent galaxies and their light curves resemble those of supernovae near or after their peak brightness.

Name RA(J2000.0) Dec(J2000.0) discovery_JD discovery_Imag Notes
OGLE15eo 3:02:15.55 -74:17:12.3 2457236.93677 19.351
OGLE15et 2:09:25.29 -70:34:07.9 2457252.80365 17.820
OGLE15fd 0:49:26.34 -71:03:59.5 2457253.82492 18.184
OGLE15fe 23:37:59.61 -64:30:09.3 2457253.75197 19.119 hostless/CV
OGLE15ff 0:04:14.04 -68:47:08.3 2457253.77409 18.923 hostless/CV
OGLE15fi 1:56:20.61 -71:03:45.7 2457258.87713 19.723
OGLE15fj 2:50:09.20 -75:20:24.0 2457257.92003 19.739
OGLE15fk 3:07:15.13 -70:28:45.7 2457257.93263 19.619
OGLE15fl 3:27:55.95 -73:32:09.1 2457255.83515 20.134
OGLE15fm 1:53:13.54 -63:49:32.1 2457255.93192 20.162
OGLE15fn 23:47:38.91 -74:32:06.6 2457258.72866 19.968
OGLE15fo 23:59:56.72 -67:43:49.2 2457257.76316 19.859
OGLE15fp 0:14:32.44 -68:41:24.3 2457255.73801 20.480
OGLE15fq 2:34:37.42 -63:15:35.9 2457252.90518 20.146
OGLE15fr 3:16:21.28 -77:05:59.4 2457258.85263 19.904
OGLE15ft 0:38:47.53 -68:36:44.0 2457260.71148 19.308
OGLE15fu 3:06:08.48 -72:34:12.5 2457260.80895 19.792
OGLE15fv 1:26:48.74 -72:40:15.9 2457261.82247 19.695
OGLE15fw 1:38:35.76 -64:09:03.9 2457265.83929 19.656
OGLE15fx 2:30:18.30 -66:07:05.2 2457264.87511 19.852
OGLE15fy 2:52:49.61 -73:53:13.4 2457266.88845 20.076
OGLE15fz 1:28:38.75 -70:47:09.2 2457267.78640 19.633
OGLE15ga 0:41:24.30 -73:01:27.3 2457268.79470 19.283 outburst in Far IR source, constant for 17 years
OGLE15gb 0:31:45.58 -64:34:16.0 2457268.76345 19.913
OGLE15gc 23:28:39.32 -67:56:48.2 2457270.72411 18.998
OGLE15gd 23:30:00.00 -66:57:28.3 2457270.72631 19.055
OGLE15gg 0:02:46.95 -73:30:42.3 2457274.73504 19.483
OGLE15gh 1:17:29.41 -74:47:23.8 2457274.80139 20.081
OGLE15gi 23:23:42.27 -78:33:51.5 2457275.81190 20.004
OGLE15gj 4:17:49.70 -66:18:40.6 2457273.88043 20.537
OGLE15gk 3:19:22.69 -66:48:19.6 2457270.81474 19.584
OGLE15gl 5:26:48.48 -65:20:43.0 2457278.85677 19.286
OGLE15gm 5:58:04.18 -73:42:53.2 2457278.88072 18.787
OGLE15gn 1:31:48.40 -68:17:14.2 2457278.72522 20.353
OGLE15go 1:44:25.15 -73:02:14.2 2457274.82072 19.717
OGLE15gp 3:32:44.88 -75:48:45.8 2457274.87305 20.363
OGLE15gq 2:21:48.82 -76:20:49.3 2457268.83600 20.622
OGLE15gr 4:02:43.79 -63:56:32.8 2457270.86397 19.973
OGLE15gs 0:02:46.91 -73:30:42.8 2457277.71237 19.150
OGLE15gt 23:50:09.23 -69:09:55.7 2457273.72165 19.251

list continued in the next ATEL.

Finding charts and light curves are available here in the lighter version: http://ogle.astrouw.edu.pl/ogle4/transients/transients-lite.html

Additional information on OGLE supernovae and references to ATELs are available here: http://www.rochesterastronomy.org/snimages/index.html

Finding charts and light curves are available here