J/ApJ/750/99 The Pan-STARRS1 photometric system (Tonry+, 2012)
The Pan-STARRS1 photometric system.
Tonry J.L., Stubbs C.W., Lykke K.R., Doherty P., Shivvers I.S.,
Burgett W.S., Chambers K.C., Hodapp K.W., Kaiser N., Kudritzki R.-P.,
Magnier E.A., Morgan J.S., Price P.A., Wainscoat R.J.
<Astrophys. J., 750, 99 (2012)>
=2012ApJ...750...99T 2012ApJ...750...99T
ADC_Keywords: Photometry ; Surveys
Keywords: atmospheric effects - instrumentation: photometers - surveys -
techniques: photometric
Abstract:
The Pan-STARRS1 survey is collecting multi-epoch, multi-color
observations of the sky north of declination -30° to unprecedented
depths. These data are being photometrically and astrometrically
calibrated and will serve as a reference for many other purposes. In
this paper, we present our determination of the Pan-STARRS1
photometric system: gP1, rP1, iP1, zP1, yP1, and wP1. The
Pan-STARRS1 photometric system is fundamentally based on the Hubble
Space Telescope Calspec spectrophotometric observations, which in turn
are fundamentally based on models of white dwarf atmospheres. We
define the Pan-STARRS1 magnitude system and describe in detail our
measurement of the system passbands, including both the instrumental
sensitivity and atmospheric transmission functions. By-products,
including transformations to other photometric systems, Galactic
extinction, and stellar locus, are also provided. We close with a
discussion of remaining systematic errors.
Description:
The Pan-STARRS1 system is a 1.8m aperture, f/4.4 telescope
illuminating a 1.4Gpixel detector spanning a 3.3° field of view,
located on Haleakala, and dedicated to sky survey observations (K. C.
Chambers et al. 2012, in preparation). The Pan-STARRS1 filters are
designated gP1, rP1, iP1, zP1, yP1, and wP1 in order to
clearly distinguish PS1 from other photometric systems.
Although the filter system for Pan-STARRS1 has much in common with
that used in previous surveys such as SDSS (York et al.
2000AJ....120.1579Y 2000AJ....120.1579Y), the gP1 filter extends 20nm redward of
gSDSS, paying the price of 5577Å sky emission for greater
sensitivity and lower systematics for photometric redshifts; the zP1
filter is cut off at 920nm, giving it a different response than the
detector response defined zSDSS; and SDSS has no corresponding yP1
filter.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 64 721 Pan-STARRS1 bandpasses
table4.dat 47 7 Pan-STARRS1 bandpass parameters
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See also:
J/PASP/124/140 : UBVRI Hp BT and VT photonic responses (Bessell+, 2012)
J/AJ/142/77 : New T dwarfs identified in Pan-STARRS 1 (Deacon+, 2011)
J/PASP/110/863 : A Stellar Spectral Flux Library: 1150-25000Å (Pickles 1998)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 4 I4 nm lambda [380/1100] Wavelength λ
6- 10 F5.3 m2 Open [0.003/1] The open bandpass capture cross-section (1)
12- 16 F5.3 m2 gp1 [0/0.6] The gp1 bandpass capture cross-section (1)
18- 22 F5.3 m2 rp1 [0/0.7] The rp1 bandpass capture cross-section (1)
24- 28 F5.3 m2 ip1 [0/0.9] The ip1 bandpass capture cross-section (1)
30- 34 F5.3 m2 zp1 [0/0.9] The zp1 bandpass capture cross-section (1)
36- 40 F5.3 m2 yp1 [0/0.7] The yp1 bandpass capture cross-section (1)
42- 46 F5.3 m2 wp1 [0/1] The wp1 bandpass capture cross-section (1)
48- 52 F5.3 --- Aero [0.94/0.99] Aerosol scattering transmission (2)
54- 58 F5.3 --- Ray [0.6/1] Rayleigh scattering transmission (2)
60- 64 F5.3 --- Mol [0.3/1] Molecular absorption transmission (2)
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Note (1): Including the nominal 1.2 airmasses of the Pan-STARRS1 standard
atmospheric extinction. In units of m2-e/photon.
Note (2): Of the nominal 1.2 airmasses of the Pan-STARRS1 standard atmosphere.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Filt [grizw_P1 Open] Filter designation
6- 11 F6.4 m2 [0.03/0.7] "Net cross section" (1)
13- 15 I3 nm lam [481/962] Filter "pivot" wavelength (2)
17- 19 I3 nm b_lam [414/918] Bandpass blue wavelength (3)
21- 24 I4 nm B_lam [551/1001] Bandpass red wavelength (3)
26- 30 F5.2 mag ZP [23/27] Zero point at 1.2 airmasses (AB mag)
32- 35 F4.2 mag Ext [0.05/0.3] Extinction at 1.2 airmasses
37- 41 F5.2 mag/arcsec mu [18.4/22.2] Calculated dark sky brightness
43- 47 F5.2 mag/arcsec muobs [18.2/22] Median observed sky brightness
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Note (1): "Net cross section" (m2) for fν=const through this filter at
1.2 airmasses (∫(A(ν)dlnν)).
Note (2): Filter "pivot" wavelength (nm) described by Bessell & Murphy
(2012, Cat. J/PASP/124/140) (∫(λA(ν)dlnν)/).
Note (3): Bandpass blue and red wavelengths (nm) obtained from a least-squares
fit of a square bandpass.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 06-Dec-2013