CDS

mrk 421

Gaia DR2: For now, Gaia DR2 data are not in SIMBAD, it is available in Vizier. The CDS will perform a cross-identification of Gaia DR2 with the astronomical objects in the SIMBAD bibliographic database. This will be done with very strict criteria in order to avoid erroneous cross-identifications. Especially, only the 6.5 milllions objects with subarseconds coordinates will be searched in Gaia DR2. Expected to be ready on June 30, 2018.

C.D.S. - SIMBAD4 rel 1.7 - 2018.06.23CEST17:36:51

Available data : Basic data  •  Identifiers  •  Plot & images  •  Bibliography  •  Measurements  •  External archives  •  Notes  •  Annotations

Basic data :
Mrk 421 -- BL Lac - type object
Origin of the objects types :

(Ref) Object type as listed in the reference "Ref"
(acronym) Object type linked to the acronym according to the original reference
() Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases

Other object types: 		Rad (Ref,7C,...), X (Ref,1A,...), gam (1AGL,1AGLR,...), G (Ref,CASG,...), BLL (Ref,SHBL,...), Bla (Ref,[DGT2001],...), UV (2EUVE,EUVE,...), QSO (QSO,[BDW2002],...), * (BPS,Gaia), GiG ([CHM2007],[U78]), AGN (Ref,CGRaBS), IR (2MASS,WISE), WD* (WD), V* (AAVSO), Q? (FBQS)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : coordinates error major axis, minor axis (in mas at epoch defined in your output options),
    position angle (in degrees North to East of the specified coordinate frame)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
ICRS coord. (ep=J2000) : 		11 04 27.31392 +38 12 31.7983 (Optical) [ 0.0247 0.0315 90 ] A 2018yCat.1345....0G
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : coordinates error major axis, minor axis (in mas at epoch defined in your output options),
    position angle (in degrees North to East of the specified coordinate frame)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
FK4 coord. (ep=B1950 eq=1950) : 		11 01 40.57 +38 28 43.1 [ 2.9002 2.4001 0 ]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : coordinates error major axis, minor axis (in mas at epoch defined in your output options),
    position angle (in degrees North to East of the specified coordinate frame)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
Gal coord. (ep=J2000) : 		179.8317 +65.0315 [ 0.0315 0.0247 0 ]
Syntax of proper motions is : "pm-ra pm-dec [error ellipse] quality bibcode"
  • pm-ra : mu-ra*cos(dec) (expressed in the ICRS system in mas/yr)
  • pm-dec : mu-dec (expressed in the ICRS system in mas/yr)
  • [error ellipse] : error major axis and minor axis (in mas), orientation angle (in deg)
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the proper motion reference
Proper motions mas/yr : 		0.007 0.048 [0.048 0.058 90] A 2018yCat.1345....0G
Syntax of radial velocity (or/and redshift) is : "value [error] (wavelength) quality bibcode"
  • value : radial velocity or/and redshift (Heliocentric frame) according to your Output Options
    (redshift may be not displayed if the data value is <0 and the database inside value is a radial velocity)
  • [error] : error of the corresponding value displayed before
  • (wavelength) : wavelength range of the measurement : Rad, mm, IR, Opt, UV, Xray, Gam or  '∼'(unknown)
  • quality : flag of quality ( A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the value's origin
Radial velocity / Redshift / cz : 		V(km/s) 9150 [~] / z(spectroscopic) 0.031 [~] / cz 9294 [~]
   D 2011NewA...16..503M
Syntax of angular size is : "maj-axis min-axis angle (wtype) quality bibcode"
  • maj-axis : major axis size (arc minutes)
  • min-axis : minor axis size (arc minutes)
  • angle : orientation angle (in degrees)
  • (incl) : inclination (in units of 15° from 0 to 7)
  • (wtype) : wavelength class for the origin of the angular size (Rad, mm, IR, Opt, UV, Xray, Gam)
  • quality : flag of quality of the angular size values ( A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the angular size reference
Angular size (arcmin): 		0.633 0.481 75 (NIR) C 2006AJ....131.1163S
Syntax of fluxes (or magnitudes) is : "filter-name (System) flux-value [error] quality MultVarFlags bibcode"
  • filter-name : U, B, V, R, I, G, J, H, K, u, g, r, i, z
  • (System) : may be AB (default is Vega)
  • flux-value : value of flux or magnitude
  • [error] : error value
  • quality : flag of quality of the flux value ( A=best quality -> E=worst quality, {� } =unknown quality)
  • MultVarFlags : Mult is zero or one char (J) for joined photometry ; Var can be zero or two chars (V[0-4])
  • bibcode : bibcode of the flux reference
Fluxes (12) :
B 13.50 [~] D 2010A&A...518A..10V
V 12.90 [~] D 2010A&A...518A..10V
R 8.31 [~] D 2008ApJS..175...97H
G 12.8144 [0.0240] C 2018yCat.1345....0G
J 11.091 [0.021] C 2006AJ....131.1163S
H 10.394 [0.027] C 2006AJ....131.1163S
K 9.996 [0.029] C 2006AJ....131.1163S
u (AB) 14.791 [0.006] C 2009yCat.2294....0A
g (AB) 13.804 [0.002] C 2009yCat.2294....0A
r (AB) 13.090 [0.006] C 2009yCat.2294....0A
i (AB) 12.805 [0.005] C 2009yCat.2294....0A
z (AB) 12.528 [0.003] C 2009yCat.2294....0A
SIMBAD with radius arcmin
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VizieR photometry viewer    sed-help-icon
within radius arcsec The VizieR photometry tool allows for easy visualization of photometry points extracted around the Simbad position from photometry-enabled catalogues in VizieR.
The search radius has to be specified by the user. It is currently limited to a maximum of 30 arcsec. It depends mostly on the precision or quality of the coordinates (SIMBAD and VizieR catalogs), the resolution of the images from which the sources were extracted, source extent, and source crowding.
Suggestions are: crowded field: 0.5 to 1.5 arcsec, 3 arcsec otherwise; uncertain coordinates (SIMBAD quality E or coordinates without reference): 5 to 30 arsec (risky!).
Some important notes on this object about identifications and objects associations.
notes:

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

: 3 : 7 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (127) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

7C 110140.70+382847.00 0FGL J1104.5+3811 NVSS J110427+381232 VIPS 402
1A 1103+38 1FGL J1104.4+3812 NVSS J110427+381231 WB 1101+3828
2A 1102+384 2FGL J1104.4+3812 OHIO M 303 WD 1101+384
3A 1102+385 3FGL J1104.4+3812 PBC J1104.4+3813 WD 1101+385
1AGL J1104+3754 1FHL J1104.4+3812 PG 1101+384 WISE J110427.30+381231.7
1AGLR J1105+3818 2FHL J1104.4+3812 PG 1101+385 WISE J110427.32+381231.9
ARGO J1105+3821 FIRST J110427.3+381231 PKS 1101+384 WN B1101.6+3828A
AT 1112+400 Gaia DR2 763335402123160576 QSO B1101+384 WN B1101.6+3828
B2 1101+38 GB2 1101+384 QSO J1104+3812 2XMM J110427.3+381231
B2.3 1101+38 GB6 J1104+3812 QSO B1101+3828 XMMSL1 J110427.8+381230
B2 1101+384 GB6 B1101+3828 RBS 939 XSS J11045+3808
B3 1101+384 87GB 110140.1+382841 2RE J1104+381 Z 184-50
B3VLA 1101+384 GeV J1104+3809 2RE J110424+381203 Z 1101.7+3828
BPS BS 16553-0057 1H 1104+382 RE J1104+381 [BAG2012] 166.1311+38.2082
BPS BS 16545-0024 HESS J1104+382 RE J110423+381214 [BDW2002] q1101+3828
BWE 1101+3828 H 1105+38 RGB J1104+382 [CHM2007] LDC 773 J110427.32+3812320
6C 110140+382847 ICRF J110427.3+381231 RGB J1104.5+3812 [CHM2007] HDC 625 J110427.32+3812320
CASG 1364 IERS B1101+384 RX J1104.4+3812 [DGT2001] B1101+384
CGRaBS J1104+3812 INTREF 438 1RXS J110427.1+381231 [FS2003] 0578
CJ1 1101+384 IVS B1101+384 S4 1101+384 [HB93] 1101+384
CJF B1101+384 JVAS B1101+384 S4 1101+38 [IN88] 1101+384
CLASS J110427.3144+381231.794 JVAS J1104+3812 S4 1101+364 [MGL2009] BZB J1104+3812
2E 2393 JVAS J1104+382 SDSS J110427.31+381231.7 [MGL2015] 5BZB J1104+3812
2E 1101.6+3828 KUG 1101+384A SHBL J110427.3+381231 [U78] 1101+38 1
2EG J1104+3812 LEDA 33452 SWIFT J1104.5+3813 [VV2000b] J110427.2+381232
3EG J1104+3809 MASIV J1104+3812 SWIFT J1104.5+3812 [VV2003b] J110427.2+381232
EGR J1104+3813 2MASS J11042730+3812318 SWIFT J1104.4+3812 [VV2006b] J110427.2+381232
1ES 1101+38.4 2MASX J11042732+3812320 TeV J1104+382 [VV2010b] J110427.2+381232
2EUVE J1104+38.2 2MAXI J1104+382 TeV J1104+3811 [VV98b] J110427.2+381232
EUVE J1104+38.1 MITG J110425+3813 UGC 6132 [ZEH2003] RX J1104.4+3812 1
EUVE J1104+38.2 Mrk 421 UZC J110427.3+381232 AAVSO 1058+38
FBQS J1104+3812 NFGS 74 VIPS J11044+3812

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References (2215 between 1850 and 2018) (Total 2215)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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                Reference summaries :

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                 or select by : (not exhaustive, explanation here)

Collections of Measurements


distance : 1    velocities : 13    MK : 1   

   

Observing logs


XMM : 34    IUE : 111   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : mrk 421

Link by name to the catalogue in VizieR :

BWE 1101+3828 2E 2393 3EG J1104+3809 EUVE J1104+38.1 EUVE J1104+38.2
FIRST J110427.3+381231 IERS B1101+384 KUG 1101+384A 2MASS J11042730+3812318 2MASX J11042732+3812320
MITG J110425+3813 NVSS J110427+381232 NVSS J110427+381231 PG 1101+384 PG 1101+385
PKS 1101+384 2RE J1104+381 2RE J110424+381203 1RXS J110427.1+381231 SDSS J110427.31+381231.7
UGC 6132 WD 1101+384 WD 1101+385 WISE J110427.30+381231.7 WISE J110427.32+381231.9
WN B1101.6+3828A WN B1101.6+3828

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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 .
The list of all annotations to SIMBAD objects can be found here .

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2018.06.23-17:36:51

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