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Name
  ZTF18ablutpo  
AAVSO UID
000-BPB-922 (No observations)  
Constellation
Sagittarius Sequence
J2000.0
18 56 05.94 -26 20 26.3  (284.02475 -26.34064) Search nearby
B1950.0 18 53 00.02 -26 24 22.6
Galactic coord. 9.594 -12.623
Other names

(Internal only)
2MASS J18560590-2620263 EPIC 214499610 USNO-B1.0 0636-0857259
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Variability type
UV:
Spectral type --
Mag. range
13.3: - 19.5 g
Discoverer --
Epoch
--
Outburst --
Period --
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto VSP Note: ASASSN-15rc is 4" to the N. Also 19.0 mag. star 3" to the SW and 18.6 mag. star 4" to the SE.
2 Otero, Sebastian Alberto J-K= 0.91 (2MASS), and Pan-STARRS1 and Gaia colours indicate that it is too red for a dwarf nova. The ASAS-SN datapoints (for ASASSN-15rc) have larger than normal error values, and show both probable flares likely coming from ZTF18ablutpo and dwarf nova outbursts. The data of the two stars are blended and strongly contaminated by the 15.6 Vmag. star UCAC4 319-206658. Some of the brightenings might be spurious. However, the ZTF detection on JD 24558337 matches one of the probable flares recorded by ASAS-SN. The Gaia EDR3 parallax is 0.2382 (+/-0.2186, unreliable?) so it looks too luminous for a red dwarf. This same object is included in the list of Large-amplitude variables in Gaia DR2 (2021A&A...648A..44M).
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References
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1 Mowlavi, N.; et al., 2021, Large-amplitude variables in Gaia Data Release
2. Multi-band variability characterization		 2021A&A...648A..44M
2 Kochanek, C. S.; et al., 2017, The All-Sky Automated Survey for Supernovae
(ASAS-SN) Light Curve Server v1.0		 2017PASP..129j4502K
3 ZTF observations (Lasair), online data --
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Images
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Supporting Documents
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1 JD light curve Otero, Sebastian Alberto 2021-07-25 05:06 UTC JD light curve with ASAS-SN and ZTF data, corrected for light contamination and with the dwarf nova outbursts (from ASASSN-15rc) removed.
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Revision History
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1 Otero, Sebastian Alberto 2021-07-25 05:06 UTC Minimum magnitude from Pan-STARRS1.

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