RA/DEC (2000)
00:44:40.342 +41:13:06.77
11.1680903 +41.2185461
Type
CV
Redshift
Discovery ReportClassification Report
Reporting Group
DAO_OTS
Discovering Data Source
DAO_OTS
Discovery Date
2021-10-09 14:42:00.000
TNS AT
Y
Public
Y
Host Name
M31
Discovery Mag
17.77
Filter
G-Gaia
Reporter/s
Dave Balam (DAO/NRC), C. E. Spratt (Ret), Phil Langill (U of Calgary), D. Green (CBAT)
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌AT_2021aaxp - 2021-10-09 16:43:41 Other / Other (None)z=
▌Show H at z=vexp= km/s
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▌Show Ca II at z=vexp= km/s
▌Show [Ca II] at z=vexp= km/s
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▌Show Tellurics 
▌Show Galaxy lines at z=
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▌Show WR-WC/O at z=vexp= km/s
   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),

Light curves

 ▌P48_ZTF-Cam_r
 ▌P48_ZTF-Cam_g
 ▌ATLAS-MLO_ATLAS-01_orange
 ▌Plaskett_Plaskett_G
 ▌Other_Other_Clear
   
Pointer position (MJD, Mag, Abs.Mag): (0.00, 0.00, 0.00)
Spectra
 ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
11097 2021-10-09 16:43:41 Other / Other 1800 Hiroyuki Maehara Kenta Taguchi None tns_2021aaxp_2021-10-09.697_Other_Other.dat tns_2021aaxp_2021-10-09.697_Other_Other.fits Object Our spectrum indicates this object is not a nova in M31 but a CV in the Milky Way Galaxy. See also ATel #14962.
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
r-ZTF P48_ZTF-Cam 2021-10-11 07:52:19 - 2021-10-11 07:52:19 2459498.828 - 2459498.828 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
247798 2021-10-11 07:52:19 2459498.828 16.75 ABMag r-ZTF P48_ZTF-Cam 30 ZTF
g-ZTF P48_ZTF-Cam 2021-10-04 08:51:22 - 2021-10-17 09:48:58 2459491.869 - 2459504.909 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
247799 2021-10-17 09:48:58 2459504.909 17.88 ABMag g-ZTF P48_ZTF-Cam 30 ZTF
247797 2021-10-04 08:51:22 2459491.869 17.73 ABMag g-ZTF P48_ZTF-Cam 30 ZTF [Last non detection]
orange-ATLAS ATLAS-MLO_ATLAS-01 2021-10-07 09:17:17 - 2021-10-11 09:57:36 2459494.887 - 2459498.915 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
246539 2021-10-11 09:57:36 2459498.915 16.367 0.018 19.33 ABMag orange-ATLAS ATLAS-MLO_ATLAS-01 30 Robot
246538 2021-10-07 09:17:17 2459494.887 19.32 ABMag orange-ATLAS ATLAS-MLO_ATLAS-01 30 Robot [Last non detection]
G-Gaia Plaskett_Plaskett 2021-10-09 14:42:00 - 2021-10-09 14:42:00 2459497.1125 - 2459497.1125 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
246100 2021-10-09 14:42:00 2459497.1125 17.77 0.07 19.5 ABMag G-Gaia Plaskett_Plaskett 900 Langill the instrument is the 0.76-m Baker-Nunn Schmidt telescope of the Rothney Astrophysical Observatory (University of Calgary)
Clear- Other_Other 2016-07-04 04:38:00 - 2021-10-10 00:21:10 2457573.69305 - 2459497.5147 6
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
246409 2021-10-10 00:21:10 2459497.5147 16.2 19.5 VegaMag Clear- Other_Other 180 Robot MASTER-IAC
246408 2021-10-10 00:17:50 2459497.51239 16.2 19.3 VegaMag Clear- Other_Other 180 Robot MASTER-IAC
246412 2021-10-09 00:23:04 2459496.51602 19 19.3 VegaMag Clear- Other_Other 180 Robot MASTER-IAC
246411 2021-10-09 00:19:44 2459496.5137 18.4 19.2 VegaMag Clear- Other_Other 180 Robot MASTER-IAC
246407 2016-07-04 04:38:00 2457573.69305 21.3 VegaMag Clear- Other_Other 540 Robot [Last non detection] MASTER-IAC
246410 2016-07-04 04:38:00 2457573.69305 21.3 VegaMag Clear- Other_Other 540 Robot [Last non detection] MASTER-IAC
AT Reports
ID Time received (UT) Sender Reporter/s Reporting group Disc. Data Source RA DEC Discovery date (UT) Discovery Mag. Filter Related files AT Type Host name Internal name Assoc. Groups End prop. period Remarks ADS Bibcode Unreal Auto classification
126342 2021-10-17 18:19:46 ZTF_Bot1 C. Fremling (Caltech) on behalf of the Zwicky Transient Facility (ZTF) collaboration ZTF ZTF 00:44:40.342 +41:13:06.77 2021-10-11 07:52:19.200 16.75 r-ZTF PSN ZTF21acgrero ZTF N
125769 2021-10-11 21:16:45 ATLAS_Bot1 J. Tonry, L. Denneau, A. Heinze et al. ATLAS ATLAS 00:44:40.336 +41:13:06.77 2021-10-11 09:57:36.000 16.367 orange-ATLAS PSN ATLAS21bkaw ATLAS N
125714 2021-10-11 07:40:38 MASTER A.Pozdnyakov, V.Shumkov, V. Lipunov et al. MASTER MASTER 00:44:40.310 +41:13:06.20 2021-10-09 00:19:43.680 18.4 Clear- Other MASTER OT J004440.31+411306.2 MASTER Prediscovery image N
125713 2021-10-11 07:39:38 MASTER A.Pozdnyakov, V.Shumkov, V. Lipunov et al. MASTER MASTER 00:44:40.280 +41:13:07.40 2021-10-10 00:17:50.496 16.2 Clear- PSN MASTER OT J004440.28+411307.4 MASTER N
125583 2021-10-09 17:07:15 Dave Balam Dave Balam (DAO/NRC), C. E. Spratt (Ret), Phil Langill (U of Calgary) et al. DAO_OTS DAO_OTS 00:44:40.320 +41:13:07.50 2021-10-09 14:42:00.000 17.77 G-Gaia 1 PNV M31 DAO_OTS 2021TNSTR3451....1B N
Related files
File Comments Last Modified (UT) Modified By
tns_2021aaxp_atrep_125583_DAO_OTS.jpg the detection triplet: current, reference, difference images (10'x10', north-up & east_left) 2021-10-09 17:07:15 Dave Balam
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
11043 2021-10-10 17:30:54 Kenta Taguchi Kenta Tagchi (Kyoto University), Hiroyuki Maehara (National Astronomical Observatory of Japan) None CV 1 Our spectrum indicates this object is not a nova in M31 but a CV in the Milky Way Galaxy. See also ATel #14962. 2021TNSCR3470....1T
Spectra
ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
11097 2021-10-09 16:43:41 Other / Other 1800 Hiroyuki Maehara Kenta Taguchi None tns_2021aaxp_2021-10-09.697_Other_Other.dat tns_2021aaxp_2021-10-09.697_Other_Other.fits Object Our spectrum indicates this object is not a nova in M31 but a CV in the Milky Way Galaxy. See also ATel #14962.

Comments

TNS
System

Sun, 10/17/2021 - 17:30

Object coordinates updated

Object coordinates updated according to AT-report 126342 of Group ZTF
Previous RA, DEC: 00:44:40.336, +41:13:06.77 (11.168065, +41.218548)
Updated RA, DEC: 00:44:40.342, +41:13:06.77 (11.1680903, 41.2185461)

Dave
Balam

Tue, 10/12/2021 - 19:14

photometry from Rothney Astrophysical Observatory

we measure the apparent magnitude of 2021aaxp on UT 2021 Oct. 12.33 as G(Gaia) = 16.75 (+/- 0.07)

0.76-m Baker-Nunn Schmidt telescope exposure = 1500 seconds

the CCD response curve is similar to the G (Gaia) filter response

TNS
System

Mon, 10/11/2021 - 20:30

Object coordinates updated

Object coordinates updated according to AT-report 125769 of Group ATLAS
Previous RA, DEC: 00:44:40.320, +41:13:07.50 (11.168, +41.21875)
Updated RA, DEC: 00:44:40.336, +41:13:06.77 (11.168065, 41.218548)