2020ApJ...899..136B

Query : 2020ApJ...899..136B

2020ApJ...899..136B - Astrophys. J., 899, 136-136 (2020/August-3)

Optical variability of the dwarf AGN NGC 4395 from the Transiting Exoplanet Survey Satellite.

BURKE C.J., SHEN Y., CHEN Y.-C., SCARINGI S., FAUCHER-GIGUERE C.-A., LIU X. and YANG Q.

Abstract (from CDS):

We present optical light curves from the Transiting Exoplanet Survey Satellite (TESS) for the archetypical dwarf active galactic nucleus (AGN) in the nearby galaxy NGC 4395 hosting a ∼10⁵ M_☉ supermassive black hole (SMBH). Significant variability is detected on timescales from weeks to hours before reaching the background noise level. The ∼month-long, 30 minute-cadence, high-precision TESS light curve can be well fit by a simple damped random walk (DRW) model, with the damping timescale τ_DRW constrained to be 2.3_–0.7^+1.8 days (1σ). NGC 4395 lies almost exactly on the extrapolation of the τ_DRW-M_BH relation measured for AGNs with BH masses that are more than three orders of magnitude larger. The optical variability periodogram can be well fit by a broken power law with the high-frequency slope (-1.88 ± 0.15) and the characteristic timescale (τ_br≡1/(2πf_br)=1.4_–0.5^+1.9 days) consistent with the DRW model within 1σ. This work demonstrates the power of TESS light curves in identifying low-mass accreting SMBHs with optical variability, and a potential global τ_DRW-M_BH relation that can be used to estimate SMBH masses with optical variability measurements.

Journal keyword(s): Active galactic nuclei - Seyfert galaxies - Black hole physics - Surveys

VizieR on-line data: <Available at CDS (J/ApJ/899/136): table1.dat>

Simbad objects: 1

Full paper

View the references in ADS

Number of rows : 1

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	NGC 4395	Sy2	12 25 48.8633109888	+33 32 48.700168152	10.84	10.54	10.11	9.98		~	1286	1

Query : 2020ApJ...899..136B

Basic data :

NGC 4395 -- Seyfert 2 Galaxy

G (2014AJ,BTS,...), AGN (2012ApJ,[VV2000c],...), X (2022MNRAS,PBC,...), Sy2 (2010A&A), Sy1 (2012ApJ), QSO (2016ApJ,QSO), HI ([KOV2009],[KVB99]), SyG (2023A&A), GiC (CAIRNS), GiG ([CHM2007]), AG? (2020MNRAS), HII ([CC2002]), * (Gaia), gam (INTREF), MIR (WISE), Opt (SDSS), var (2021Sci)

12 25 48.8633109888 +33 32 48.700168152 (Optical) [ 0.1314 0.0735 90 ] A 2020yCat.1350....0G

12 23 19.8826912968 +33 49 24.950910297 [ 0.1314 0.0735 90 ]

162.0947693547792 +81.5328903047566 [ 0.1314 0.0735 90 ]

-2.667 0.697 [0.166 0.133 90] A 2020yCat.1350....0G

V(km/s) 331 [150] / z(emission) 0.00110586 [0.0005] / cz 331.5285 [150] (Opt) C 2022ApJS..261....2K

SAB C 2019MNRAS.488..590B

5.28422 2.30762 123 (Opt) B 2023ApJS..269....3M

U (AB) 10.84 [0.03] C 2014MNRAS.445..881C

B (AB) 10.54 [0.03] C 2014MNRAS.445..881C

V (AB) 10.11 [0.03] C 2014MNRAS.445..881C

R (AB) 9.98 [0.03] C 2014MNRAS.445..881C

G 16.760485 [0.011245] C 2020yCat.1350....0G

J 10.660 [0.031] C 2006AJ....131.1163S

H 10.246 [0.045] C 2006AJ....131.1163S

K 9.976 [0.058] C 2006AJ....131.1163S

u (AB) 15.356 [0.012] C 2011yCat.2306....0A

g (AB) 12.2739 [0.0004] B 2023ApJS..269....3M

r (AB) 11.8446 [0.0004] B 2023ApJS..269....3M

i (AB) 13.724 [0.003] C 2009ApJS..182..543A

z (AB) 13.8573 [0.0038] B 2023ApJS..269....3M

Overlay

points in this preview

2MASS DSS

All

(CDSPortal)

Send to

Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

An access of full data is available using the icon Vizier near the identifier of the catalogue

`NGC 4395`	`PBC J1225.7+3331`	`[CC2002] NGC 4395 99`	`[RGG2013] 21`
`BTS 135`	`QSO J1225+3332`	`[CHM2007] HDC 706 J122548.92+3332482`	`[VDD93] 158`
`CAIRNS J122548.92+333248.4`	`SDSS J122548.86+333248.7`	`[CHM2007] LDC 867 J122548.92+3332482`	`[VV2000c] J122548.9+333248`
`INTREF 495`	`SWIFT J1202.5+3332`	`[HSN2016] J186.45+33.54`	`[VV2003c] J122548.9+333248`
`KUG 1223+338`	`SWIFT J1225.8+3330`	`[KOV2009] 14`	`[VV2006c] J122548.9+333248`
`LEDA 40596`	`SWIFT J1225.7+3331`	`[KRL2007b] 115`	`[VV2010c] J122548.9+333248`
`LJHY 102`	`UGC 7524`	`[KVB99] 18`	`[VV98c] J122548.9+333249`
`MaNGA 1-405438`	`UZC J122549.0+333251`	`[KVC2005] 11`	`Gaia DR3 4016037658643693696`
`MaNGA 12483-9102`	`WISE J122548.88+333248.8`	`[LLJ2000] NGC 4395 X1`	`Gaia DR2 4016037658643693696`
`2MASX J12254892+3332482`	`2XMM J122548.8+333249`	`[M98c] 122320.9+334922`
`MCG+06-27-053`	`Z 187-42`	`[MFH99] A`
`NSAID v0 89394`	`Z 1223.4+3349`	`[MI94] Sm 77`

References (1286 between 1850 and 2026) (Total 1286)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

Follow new references on this object

Collections of Measurements

Observing logs

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : NGC 4395

Link by name to the catalogue in VizieR :

`NGC 4395`	`KUG 1223+338`	`2MASX J12254892+3332482`	`SDSS J122548.86+333248.7`	`UGC 7524`
`WISE J122548.88+333248.8`	`Gaia DR3 4016037658643693696`	`Gaia DR2 4016037658643693696`

Search by coordinates in Vizier (radius: 5 arcsec)

Annotations :
Annotations allow a user to add a note or report an error concerning the astronomical object and its data. It requires registration to post a note. See description .
Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

The annotation server is currently not available. Sorry for any inconvenience

To bookmark this query, right click on this link: simbad:objects in 2020ApJ...899..136B and select 'bookmark this link' or equivalent in the popup menu