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Details for Revision 3
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Name
  TCP J21040470+4631129  
AAVSO UID
000-BND-892 (112722 observations)  
Constellation
Cygnus Sequence
J2000.0
21 04 04.68 +46 31 14.5  (316.01950 +46.52069) Search nearby
B1950.0 21 02 19.91 +46 19 16.0
Galactic coord. 87.760 -0.235
Other names

(Internal only)
GSC2.3 N31X108363 Gaia19dfe IPHAS J210404.68+463114.0
PSN J21040470+4631129 PSO J210404.693+463113.906 UGPS J210404.68+463114.1
USNO-A2.0 1350-13375367 USNO-B1.0 1365-0394214  
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Variability type
UGWZ
Spectral type --
Mag. range
8.4 - 18.1 V
Discoverer Hideo Nishimura
Epoch
--
Outburst --
Period --
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto VSP Note: 19.4 mag. star 3" to the E and 15.7 mag. star 7" to the SW.
2 Schmeer, Patrick The Gaia data clearly indicate ~0.5 mag brightening between 2014 November and 2019 April (vsnet-alert 23441).
3 Schmeer, Patrick Swift/XRT detected a relatively bright X-ray source at the position of the dwarf nova, with an XRT count rate of 0.64 0.03 cts/s on 2019 July 13 (ATel #12947).
4 Schmeer, Patrick A spectrum obtained on 2019 Jul 12.9 UT is consistent with a large amplitude outburst of a cataclysmic variable (ATel #12936).
5 Schmeer, Patrick Inexplicably called "possible supernova" by the discoverer. No outbursts were recorded by the ASAS-SN Sky Patrol between 2015 March 20 and 2019 July 9. Gaia DR2 parallax 9.1337 0.1156 mas (distance 109.2 1.4 pc).
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References
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1 V. Neustroev; D. Boyd; P. Berardi; et al., 2019, ATel #13009 2019ATel13009....1N
2 K. Sokolovsky; V. Neustroev; K. L. Page; et al., 2019, ATel #12947 2019ATel12947....1S
3 F. Teyssier, 2019, ATel #12936 2019ATel12936....1T
4 T. Kato, 2019, vsnet-alert #23441 --
5 Gaia Alerts, 2019 (online data) --
6 T. Vanmunster, 2019, vsnet-alert #23388 --
7 CBAT "Transient Object Followup Reports", 2019 (online data) --
8 Kochanek, C. S.; et al., 2017, The All-Sky Automated Survey for Supernovae
(ASAS-SN) Light Curve Server v1.0
2017PASP..129j4502K
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Supporting Documents
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Revision History
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7 Schmeer, Patrick 2020-02-27 20:12 UTC Remark and reference added.
6 Schmeer, Patrick 2019-08-09 17:45 UTC Orbital period from 2019ATel13009....1N.
5 Schmeer, Patrick 2019-07-30 02:32 UTC Gaia Alerts name and reference added.
4 Schmeer, Patrick 2019-07-18 20:13 UTC Remark and reference added.
3 Schmeer, Patrick 2019-07-15 20:37 UTC Type from vsnet-alert 23388.
2 Otero, Sebastian Alberto 2019-07-13 19:50 UTC Maximum magnitude from AAVSO V data. Minimum magnitude derived from Pan-STARRS1.
1 Schmeer, Patrick 2019-07-12 16:24 UTC Gaia DR2 position. Minimum magnitude from IPHAS DR2.