2015AJ....149..159R


Query : 2015AJ....149..159R

2015AJ....149..159R - Astron. J., 149, 159 (2015/May-0)

A calibration of NICMOS camera 2 for low count rates.

RUBIN D., ALDERING G., AMANULLAH R., BARBARY K., DAWSON K.S., DEUSTUA S., FACCIOLI L., FADEYEV V., FAKHOURI H.K., FRUCHTER A.S., GLADDERS M.D., DE JONG R.S., KOEKEMOER A., KRECHMER E., LIDMAN C., MEYERS J., NORDIN J., PERLMUTTER S., RIPOCHE P., SCHLEGEL D.J., SPADAFORA A. and SUZUKI N.

Abstract (from CDS):

NICMOS 2 observations are crucial for constraining distances to most of the existing sample of z > 1 SNe Ia. Unlike conventional calibration programs, these observations involve long exposure times and low count rates. Reciprocity failure is known to exist in HgCdTe devices and a correction for this effect has already been implemented for high and medium count rates. However, observations at faint count rates rely on extrapolations. Here instead, we provide a new zero-point calibration directly applicable to faint sources. This is obtained via inter-calibration of NIC2 F110W/F160W with the Wide Field Camera 3 (WFC3) in the low count-rate regime using z ∼ 1 elliptical galaxies as tertiary calibrators. These objects have relatively simple near-IR spectral energy distributions, uniform colors, and their extended nature gives a superior signal-to-noise ratio at the same count rate than would stars. The use of extended objects also allows greater tolerances on point-spread function profiles. We find space telescope magnitude zero points (after the installation of the NICMOS cooling system, NCS) of 25.296 ± 0.0222 for F110W and 25.803 ± 0.023 for F160W, both in agreement with the calibration extrapolated from count rates ≳1000 times larger (25.262 and 25.799). Before the installation of the NCS, we find 24.843 ± 0.025 for F110W and 25.498 ± 0.021 for F160W, also in agreement with the high-count-rate calibration (24.815 and 25.470). We also check the standard bandpasses of WFC3 and NICMOS 2 using a range of stars and galaxies at different colors and find mild tension for WFC3, limiting the accuracy of the zero points. To avoid human bias, our cross-calibration was ''blinded'' in that the fitted zero-point differences were hidden until the analysis was finalized.

Abstract Copyright:

Journal keyword(s): supernovae: general - techniques: photometric

Nomenclature: Fig. 4, Tables 1+A3: [RAA2015] FNNNW NN N=22+21, [RAA2015] FNNNW 61K NN N=3+7.

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 23

goto Full paper

goto View the references in ADS

Number of rows : 23
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 LSPM J0036+1821 BD* 00 36 16.1119130763 +18 21 10.291990145       18.451 16.053 L3.5 190 0
2 BD+52 913 WD* 05 05 30.6182785658 +52 49 51.920797126 10.25 11.44 11.69 11.93 12.108 DA.8 1011 0
3 GD 71 WD* 05 52 27.6197286025 +15 53 13.228639956 11.675 12.783 13.032 13.169 13.337 DA1.5 346 0
4 2MASS J05591914-1404488 BD* 05 59 19.1884616785 -14 04 49.215388622           T4.5 136 0
5 SCP 06C0 SN* 12 29 25.654 +01 50 56.58           SNIa 9 0
6 NAME Thames SN SN* 12 36 55.214 +62 13 03.75           ~ 11 0
7 NAME Lancaster SN SN* 12 36 56.720 +62 12 53.33           ~ 17 0
8 NAME Redford SN SN* 12 37 01.700 +62 12 23.98           ~ 8 0
9 ClG J1252-2927 ClG 12 52 54.4 -29 27 17           ~ 151 0
10 GD 153 WD* 12 57 02.3224875106 +22 01 52.634392478 11.883 13.060 13.349 13.488 13.669 DA1.2 326 0
11 LAWD 52 WD* 13 38 50.4780798626 +70 17 07.641423392 11.807 12.54 12.60 13.01 12.979 DA2.4 201 0
12 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 644 1
13 ClG J1434+3427 ClG 14 34 28.6 +34 26 22           ~ 21 0
14 SCP 06H5 SN* 14 34 30.139 +34 26 57.29           SNIa 6 0
15 TYC 4413-304-1 PM* 14 51 57.9795773893 +71 43 17.393377038 12.751 12.84 12.16 12.05 11.313 G0 33 0
16 GSPC P177-D * 15 59 13.5785609612 +47 36 41.905095533   14.17 13.52 13.42   G0 36 0
17 UCAC3 292-117285 * 16 19 46.1029174395 +55 34 17.862527064   17.09 16.23 16.41   G0-5 11 1
18 GSC 02581-02323 * 16 31 33.8125078770 +30 08 46.398483547 13.576 12.972 12.917 12.564 12.212 G2V 65 0
19 VB 8 Er* 16 55 35.2561420232 -08 23 40.752903617   18.7 16.916 14.566 12.24 M7Ve 397 0
20 PG 1657+344 WD* 16 58 51.1126140106 +34 18 53.321180387   16.12       DA.9 53 0
21 2MASS J17583798+6646522 * 17 58 37.9945876723 +66 46 52.112481269   15.10 13.80     K1.5III 18 0
22 * alf Lyr dS* 18 36 56.33635 +38 47 01.2802 0.03 0.03 0.03 0.07 0.10 A0Va 2549 0
23 ClG J2235-2557 ClG 22 35 20.6 -25 57 42           ~ 140 0

To bookmark this query, right click on this link: simbad:objects in 2015AJ....149..159R and select 'bookmark this link' or equivalent in the popup menu


2021.07.31-18:55:38

© Université de Strasbourg/CNRS

    • Contact