AAVSO Home



Welcome, Guest. You are not logged in.
Log in
    Revise    New Search
Latest Details
Log in to retrieve additional aliases from SIMBAD.
Name
  MGAB-V249  
AAVSO UID
000-BNC-686 (190 observations)  
Constellation
Cygnus Sequence
J2000.0
21 30 56.71 +44 20 46.4  (322.73629 +44.34622) Search nearby
B1950.0 21 29 02.59 +44 07 31.3
Galactic coord. 89.496 -5.125
Other names

(Internal only)
2MASS J21305671+4420466 ATO J322.7362+44.3462 CMC15 J213056.7+442046
GALEX J213056.8+442047 GSC2.3 N31I073829 IPHAS J213056.72+442046.5
UCAC2 46973264 UCAC4 672-097665 USNO-A2.0 1275-15880340
USNO-B1.0 1343-451411 ZTF J2130+4420 ZTFJ213056.71+442046.5
(Not logged in)  Add name
Variability type
E/WD+IBWD
Spectral type He-sdOB+WD
Mag. range
15.28 - 15.70 g
Discoverer Gabriel Murawski; T. Kupfer et al.
Epoch
28 Feb 2014 (HJD 2456716.9169) Ephemeris
Outburst --
Period 0.027319513001 d  (39.340098721 min)
Rise/eclipse dur. --
Remarks
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 Schmeer, Patrick Gaia DR2 parallax 0.8329 ± 0.0305 mas (distance 1162 ± 43 pc).
2 Murawski, Gabriel Amplitude similar in all grizy bands. BP-G= -0.09. Min II = 15.49 g.
(Not logged in)  Add remark
References
Click reference title/citation to view in new window. Roll over index number to view submission details.
1 Kupfer T.; et al., 2020, The first ultracompact Roche lobe-filling hot
subdwarf binary		 2020arXiv200201485K
2 Burdge, K. B.; Prince, T. A.; Fuller, J.; et al., 2020, A Systematic Search
of Zwicky Transient Facility Data for Ultracompact Binary LISA-detectable
Gravitational-wave Sources		 2020ApJ...905...32B
3 Masci, F. J.; et al., 2019, The Zwicky Transient Facility: Data Processing,
Products, and Archive		 2019PASP..131a8003M
4 G. Ramsay; M. Kennedy; P. Hakala; et al., 2019, ATel #13048 2019ATel13048....1R
5 Chambers, K. C.; et al., 2016,The Pan-STARRS1 Surveys 2016arXiv161205560C
External Links
Links open in a new window. Not all links may be valid for this particular target.
Location    Go   
Select a Location for more details.
Images
Please review Digitized Sky Survey Acknowledgment and Copyright.
Size 5' x 5' (297 x 298 pixels)
Center 21 30 56.71 +44 20 46.4 (J2000)
Source STScI
Survey

Red, all sky, 1.0 arcsec/pixel
  Negative
Supporting Documents
Click document name to open or save. Browser plug-in or other software may be required for viewing.
4 Phase plot Murawski, Gabriel 2019-08-30 03:10 UTC Combined phase curve with ZTF and Pan-STARRS1 data.
3 Phase plot Nowak, Adam 2019-07-01 07:29 UTC Phase plot including ZTF and NADA data. NADA CV filter (CV-g= -0.21) and ZTF r filter (r-g= -0.21) data shifted to g magnitude.
2 JD plot Murawski, Gabriel 2019-05-25 21:05 UTC Light curve with ZTF data.
1 Phase plot Murawski, Gabriel 2019-05-25 20:58 UTC Combined phase curve with ZTF and Pan-STARRS1 data.
(Not logged in)  Add document
Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
6 Otero, Sebastian Alberto 2021-11-15 21:32 UTC Type from 2020ApJ...905...32B.
5 Murawski, Gabriel 2020-02-06 15:00 UTC Type, spectral type and discoverer from 2020arXiv200201485K.
4 Schmeer, Patrick 2020-02-05 00:11 UTC Several designations added.
3 Murawski, Gabriel 2019-08-30 03:06 UTC Type and spectral type from 2019ATel13048....1R. Period and epoch from ZTF and Pan-STARRS1 data.
2 Nowak, Adam 2019-07-01 07:29 UTC Period and epoch from ZTF and NADA data.
1 Murawski, Gabriel 2019-05-27 23:56 UTC Gaia DR2 position.

Guidelines    FAQ    Manual    Forum    Variability Types    Passbands    Copyright    Acknowledgments    Privacy    Contact    Help us   
The International Variable Star Index
© 2005-2025 American Association of Variable Star Observers (AAVSO)
Version 1.1 [C]
172.30.2.202