https://www.astronomerstelegram.org Cataclysmic Variable, from The Astronomer's Telegram en-us https://www.astronomerstelegram.org/?read=17791 Hiromasa Hoke, Keisuke Isogai, Hiroshi Itoh, Masayuki Moriyama Hiromasa Hoke, Keisuke Isogai, Hiroshi Itoh, Masayuki Moriyama hoke@kusastro.kyoto-u.ac.jp Credentialed by: Keisuke Isogai (isogai@kusastro.kyoto-u.ac.jp) The Astronomer's Telegram ATel17791 We report on spectral features seen in the transient TCP J07151825+4753167 on 2026-05-09.534 UT and TCP J15030519+2202041 on 2026-05-09.554 obtained by using a fiber-fed integral field spectrograph (KOOLS-IFU; Matsubayashi et al. ... 2026-05-10T17:43:21-00:00 https://www.astronomerstelegram.org/?read=17784 Marchev, D. ; Borisov, B. ; Atanasova-Sartliiska, T. ; Yordanova, G. ; Georgiev, A. ; Marchev, V. Marchev, D. ; Borisov, B. ; Atanasova-Sartliiska, T. ; Yordanova, G. ; Georgiev, A. ; Marchev, V. vlad.marchev@gmail.com Credentialed by: Vladislav Marchev (vlad.marchev@gmail.com) The Astronomer's Telegram ATel17784 We present our recent photometric observations of T CrB obtained on the 5th and 6th of May 2026 and we compare them with the ones from ATel#17052 an year ago. ... 2026-05-09T14:36:32-00:00 https://www.astronomerstelegram.org/?read=17759 Nicolaus Steenken, Jan-Uwe Ness Nicolaus Steenken, Jan-Uwe Ness jan.uwe.ness@esa.int Credentialed by: Jan-Uwe Ness (jan.uwe.ness@esa.int) The Astronomer's Telegram ATel17759 Following the report of increased X-ray activity in the Cataclysmis Variable WW Lyn in ATel#17749, a polarimetric observation was conducted on 2026-04-17 (JD 2461148.34). ... 2026-04-19T09:35:20-00:00 https://www.astronomerstelegram.org/?read=17749 Richard Saxton, Jan-Uwe Ness, Felix Fuerst Richard Saxton, Jan-Uwe Ness, Felix Fuerst richard.saxton@ext.esa.int Credentialed by: Richard Saxton (richard.saxton@ext.esa.int) The Astronomer's Telegram ATel17749 We report an increase in X-ray flux from the cataclysmic variable, WW Lyn, RA=07:34:07.8; DEC=+38:10:40.1 In a slew from XMM-Newton of 31/03/2026 the flux from WW Lyn was observed to be 5.7 & plusmn;1.1 & times; 10-12 ergs/s/cm2 in the soft X-ray (0.2-2 keV) band and 1.3 & plusmn;0.2 & times; 10-11 ergs/s/cm2 in the broad (0.2-12 keV) band. ... 2026-04-11T18:08:39-00:00 https://www.astronomerstelegram.org/?read=17743 R. Hamada, K. De, D. Suzuki, T. Sumi, K. Nunota, T. Suen, A. Masegian, T. Tamaoki, S. Makida, R. Oishi, R. Ogawa, H. Ose R. Hamada, K. De, D. Suzuki, T. Sumi, K. Nunota, T. Suen, A. Masegian, T. Tamaoki, S. Makida, R. Oishi, R. Ogawa, H. Ose kd3038@columbia.edu Credentialed by: Kishalay De (kde@flatironinstitute.org) The Astronomer's Telegram ATel17743 We report the discovery and spectroscopic classification of a very bright NIR transient during the Galactic bulge survey carried out by the PRime-focus Infrared Microlensing Experiment (PRIME). ... 2026-04-07T15:49:28-00:00