2021MNRAS.501L...1N

Query : 2021MNRAS.501L...1N

2021MNRAS.501L...1N - Mon. Not. R. Astron. Soc., 501, L1-L6 (2021/February-2)

'Novae, supernovae, or something else?' - (super-)nova highlights from Hoffmann & Vogt are quite certainly comets (AD 668 and 891).

NEUHAUSER R., NEUHAUSER D.L. and CHAPMAN J.

Abstract (from CDS):

Galactic novae and supernovae can be studied by utilizing historical observations, yielding explosion time, location on sky, etc. Recent publications by Hoffmann & Vogt present CVs (Cataclysmic Variables), supernova remnants, planetary nebulae, etc. as potential counterparts based on their list of historically reported transients from the Classical Chinese text corpus. Since their candidate selection neglects the state-of-the-art (e.g. Stephenson & Green), and since it includes 'broom stars' and 'fuzzy stars', i.e. probable comets, we investigate their catalogue in more detail. We discuss here their two highlights, the suggestion of two 'broom star' records dated AD 667 and 668 as one historical supernova and of the 'guest star' of AD 891 as recurrent nova U Sco. The proposed positional search areas are not justified due to translation and dating problems, source omission, as well as misunderstandings of historical Chinese astronomy and unfounded textual interpretations. All sources together provide strong evidence for comet sightings in both AD 668 and 891 - e.g. there are no arguments for stationarity. The AD 667 record is a misdated doublet of 668. Our critique pertains more generally to their whole catalogue of '24 most promising events': their speculations on counterparts lack a solid foundation and should not be used in follow-ups.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): comets: general - comets: individual: (668, X/891 J1) - novae, cataclysmic variables - supernovae: general

Simbad objects: 37

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Number of rows : 37
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 * 22 And * 00 10 19.2465004853 +46 04 20.175741831 5.69 5.44 5.04 4.62 4.33 F5II 111 0
2 * tet And ** 00 17 05.5023632446 +38 40 53.888625622 4.72 4.67 4.61 4.53 4.52 A2V 184 0
3 * sig And PM* 00 18 19.6573687726 +36 47 06.808541679 4.64 4.57 4.52 4.44 4.44 A2V 154 0
4 * rho And PM* 00 21 07.2687391968 +37 58 06.979645056   5.60 5.18     F5IV-V 140 0
5 SN 1572A SN* 00 25 21.5 +64 08 27           B8 1254 1
6 * eta Per * 02 50 41.8099734665 +55 53 43.779721818 7.38 5.48 3.79 2.56 1.67 K3-Ib-IIa 226 0
7 * gam Per SB* 03 04 47.8201112829 +53 30 23.262605954 4.08 3.63 2.93 2.34 1.89 G9III+A2-III: 225 0
8 * alf Per V* 03 24 19.3700924 +49 51 40.245455 2.64 2.27 1.79     F5Ib 870 1
9 * 7 Tau ** 03 34 26.62704 +24 27 51.8294   8.59 8.56 7.32   A3IVs 132 0
10 * del Per Be* 03 42 55.4928046977 +47 47 14.988257477 2.38 2.89 3.01 2.99 3.10 B5III 328 0
11 * 17 Tau Be* 03 44 52.5370897890 +24 06 48.016260072 3.19 3.59 3.70 3.71 3.80 B6IIIe 415 1
12 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
13 * mu. Per SB* 04 14 53.8635146524 +48 24 33.590334394 5.75 5.12 4.16 3.38 2.83 G0Ib 252 0
14 SNR G156.4-01.2 SNR 04 28 +47.1           ~ 10 0
15 * eps Tau ** 04 28 37.0002551195 +19 10 49.563140930 5.42 4.54 3.53     G9.5IIICN0.5 628 1
16 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
17 * alf Tau LP? 04 35 55.23907 +16 30 33.4885 4.32 2.40 0.86 -0.37 -1.31 K5+III 1298 2
18 V* V392 Per No* 04 43 21.3694280976 +47 21 25.869776436           ~ 59 0
19 SNR G160.8+02.6 SNR 05 01 00.000 +46 40 00.00           ~ 233 0
20 * alf Aur SB* 05 16 41.35871 +45 59 52.7693 1.33 0.88 0.08 -0.52 -0.96 G3III: 1207 0
21 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5476 0
22 * lam Ori ** 05 35 08.27761 +09 56 02.9611 2.45 3.48 3.66 3.72 3.89 O8IIIf+B0.5V 327 0
23 * iot UMa ** 08 59 12.45362 +48 02 30.5741 3.40 3.33 3.14 2.92 2.85 A6 307 0
24 * kap UMa ** 09 03 37.52762 +47 09 23.4890   3.55 3.55     A1Vn 175 0
25 * lam UMa PM* 10 17 05.7792565752 +42 54 51.889698684 3.54 3.48 3.45 3.37 3.38 A1IV 198 0
26 * mu. UMa SB* 10 22 19.7276765267 +41 29 58.337745272 6.53 4.64 3.05 1.76 0.80 M0III 331 0
27 * ksi UMa RS* 11 18 10.931880 +31 31 45.44004 4.42 4.38 3.79     F8.5:V+G2V 283 0
28 * nu. UMa * 11 18 28.7372062295 +33 05 39.501852796 6.44 4.89 3.49 2.43 1.73 K3-III: 211 0
29 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2417 1
30 * bet UMi V* 14 50 42.32580 +74 09 19.8142 5.32 3.55 2.08 0.97 0.21 K4-III 344 1
31 NAME Lupus SN SNR 15 02 22.1 -42 05 49           ~ 1407 1
32 V* U Sco CV* 16 22 30.7791646104 -17 52 43.166822628           F8+K2 592 0
33 * psi Oph PM* 16 24 06.1777460190 -20 02 14.352188619 6.37 5.53 4.50 3.72 3.22 K0-II-III 91 0
34 * chi Oph Be* 16 27 01.4355697915 -18 27 22.499961252 3.95 4.71 4.43 3.97 3.73 B2Vne 624 0
35 * phi Oph PM* 16 31 08.3669673955 -16 36 45.831122231 5.90 5.19 4.27 3.62 3.18 G8+IIIa 129 0
36 * ome Oph a2* 16 32 08.2003815598 -21 27 59.052127058 4.69 4.56 4.45 4.32 4.30 ApSrEuCr 167 0
37 NAME Kepler's SN SNR 17 30 40.51 -21 29 14.4           ~ 851 3

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