From: Saul Perlmutter (saul@lbl.gov)
Date: Mon Jul 15 2002 - 19:00:36 PDT
attached mail follows:
+----------------------------------------------------------+
| WFPC2
| STScI Analysis Newsletter
| WFPC2 STAN 52
| July 2002
+----------------------------------------------------------+
Visit the WFPC2 web site http://www.stsci.edu/instruments/wfpc2
for the latest News.
CONTENTS:
- Cycle 12 Edition of the WFPC2 Instrument Handbook Available
- Results of SMOV3B
- SMOV3B WFPC2 Lyman-Alpha Throughput Check
- SMOV3B WFPC2 Photometry Check
- SMOV3B WFPC2 UV Contamination Monitoring and Throughput
Check
- SMOV3B Flat Field Verification
- SMOV3B Check of the WFPC2 Point-Spread-Function
- Charge Transfer Efficiency for Very Faint Objects and a
Reexamination of the Long-vs-Short Problem for the WFPC2
- New CTE Formula from Dolphin
- Anomalous PHOTFLAM Value for F656N Filter
+----------------------------------------------------------+
http://www.stsci.edu/instruments/wfpc2/Wfpc2_hand5/wfpc2_inst_hbTOC.html
Cycle 12 Edition of the WFPC2 Instrument Handbook Available
L. Lubin
The WFPC2 Instrument Handbook for Cycle 12 (Version 7.0) will
be released this summer. Major revisions include : (1) updated
information on the CLOCKS=YES mode, (2) the status of the
anomalous rotational offset for many WFPC2 filters, (3) the
presentation of the most up-to-date analyses and correction
formula for the CTE effect, (4) a discussion of the latest
conclusions on the apparent "Long vs. Short" anomaly, (5) a
description of the new options available in the on-line Exposure
Time Calculator, (6) a description of the latest flat field
files and their improved accuracy, and (7) a summary of the
Cycle 11 calibration plan.
http://www.stsci.edu/instruments/wfpc2/wfpc2_tir_list.html
Results of SMOV3B
http://www.stsci.edu/instruments/wfpc2/Wfpc2_tir/tir0205.html
SMOV3B WFPC2 Lyman-Alpha Throughput Check
L. Lubin, B. Whitmore, A. M. Koekemoer, I. Heyer
The far-UV throughput of WFPC2 was monitored on March 23, 2002,
for any signs of unexpected throughput degradation following
Servicing Mission 3b. No significant changes were detected.
http://www.stsci.edu/instruments/wfpc2/Wfpc2_tir/tir0204.html
SMOV3B WFPC2 Photometry Check
B. Whitmore and I. Heyer
A check of the photometric throughput of the WFPC2 was
performed March 31, 2002 (program ID: 8953). The standard
star GRW+70d5824 was observed with a selection of filters
and the standard star was centered in each of the four CCDs.
The data indicate that any changes in the photometric
throughputs due to SM3B are less than 1% in most of the
visible wavelength filters, and less than a few percent in
the UV filters. The distribution shows a mean value of 0.34
+/- 0.26 sigma (where sigma is defined separately for each
filter-chip combination) for all the observations,
essentially consistent with an unchanged photometric
throughput. This corresponds to about 0.4% on an absolute
scale. The long-term throughput decline is consistent with
the expected CTE loss. The response of the WFPC2 has
essentially not changed.
http://www.stsci.edu/instruments/wfpc2/Wfpc2_tir/tir0203.html
SMOV3B WFPC2 UV Contamination Monitoring and Throughput Check
A. M. Koekemoer, S. Gonzaga, L. Lubin, B. Whitmore, I. Heyer
The throughput of the WFPC2 cameras in the UV is potentially
susceptible to significant decreases as a result of
contaminants deposited on the cold CCD windows, once the
instrument has been cooled down to -88 C. An important part
of our SMOV3B checkout involved intensive monitoring of this
contamination using the F170W filter, to ensure that the
throughput never dropped below levels that can safely be
removed by the regular decontamination procedures. We report
here the results of these measurements, showing that the
throughput remained at safe levels throughput SMOV3B, and in
addition demonstrating that the decontamination procedures
during SMOV3B returned the throughput to its nominal levels.
We also find that the daily contamination rates have now
returned to their pre-SMOV3B levels.
http://www.stsci.edu/instruments/wfpc2/Wfpc2_tir/tir0202.html
SMOV3B Flat Field Verification
A. M. Koekemoer and I. Heyer
We compare WFPC2 Earthflats taken before and after the 2002
Servicing Mission 3B. Most of the field-of-view shows no
change (<0.3%) in flat field calibration. The only changes
on large scales are at very low levels (<0.1-0.2%) and are
likely attributable to long-term changes in the camera
geometry, rather than SM3B.
http://www.stsci.edu/instruments/wfpc2/Wfpc2_tir/tir0201.html
SMOV3B Check of the WFPC2 Point-Spread-Function
V. Kozhurina-Platais, L.M. Lubin, and A.M. Koekemoer
We examine the Point-Spread-Function (PSF) of the WFPC2
after the Servicing Mission 3b using dithered observations
of the rich globular cluster, Omega Cen. Comparisons to
previous measurements of the PSF which were made after the
last two servicing missions (SM2 and SM3a) indicate that
no significant variations in the PSF have occurred. We
also present an analysis of the shape of the PSF as a
function of five positions on the Planetary Camera (PC)
chip.
http://www.stsci.edu/instruments/wfpc2/Wfpc2_isr/wfpc2_isr0203.html
Charge Transfer Efficiency for Very Faint Objects and a
Reexamination of the Long-vs-Short Problem for the WFPC2
B. Whitmore and I. Heyer
An analysis of WFPC2 observations of Omega Cen and NGC 2419
leads to the following results.
1. The correction formula developed by Whitmore, Heyer, and
Casertano (1999; hereafter WHC99) does a reasonable job of
correcting for CTE loss down to extremely low count levels
(i.e., so faint you cannot actually see the object but only
know of its existence from longer exposures). There is no
sharp cutoff to the detection threshold for very faint stars.
2. A comparison of the WHC99 formula with the Dolphin (2000b;
hereafter D00) formula shows reasonable agreement for bright
and moderately bright stars, with the D00 formula giving
better results. However, at very faint levels, the D00
formula overestimates, and the WHC99 formula underestimates,
the correction by tens of percent. Our current recommendation
is to use the D00 formula for CTE loss correction.
3. A reexamination of the long-vs-short nonlinearity shows
that the effect is very small (a few percent) or nonexistent
for uncrowded fields, with less than ~ 1000 stars per chip.
However, for crowded fields, with ~ 10,000 stars per chip,
apparent nonlinearities of tens of percent are possible. The
most likely explanation is that this is due to an overestimate
of the sky measurement in the short exposure, which is
probably due to the presence of scattered light around bright
stars and the subsequent improvement in CTE loss in these
regions. No correction formula has been derived in the current
study since the effect is dependent on the analysis parameters
(aperture size) and probably also on the photometry package
(psf-fitting, aperture photometry, ...).
4. Preflashing may be a useful method of reducing the effects
of CTE loss for certain observations (moderately bright
objects on very faint backgrounds), but the effects of added
noise and longer overheads limit its effectiveness.
5. The detection thresholds for typical broad band
observations have been reduced by ~ 0.1 - 0.2 mag in the ~7
years since WFPC2 was launched. For worst-case observations
(F336W) the effect is currently ~ 0.4 magnitudes.
http://www.noao.edu/staff/dolphin/wfpc2_calib/
New CTE Formula from Dolphin
L. Lubin
We highlight recent work on the Charge Transfer Efficiency
(CTE) problem for WFPC2 by Andrew Dolphin (NOAO). Current
CTE correction formulae are of a functional form that assumes
the charge loss per pixel is constant as a star is read out.
For a CTE correction that is itself a function of counts,
this assumption is not strictly true. In most cases, however,
the CTE loss is sufficiently small that the error introduced
by assuming a constant CTE loss per pixel is negligible, and,
thus, such a formula provies an adequate approximation.
However, for very faint stars, the CTE loss can exceed half
of the star's initial brightness, thus causing the charge
loss per pixel to change significantly as the star reads out.
The latest correction equations by Dolphin (2002) take into
account the fact that the magnitude loss per pixel is not
constant as the star reads out and, therefore, provide more
accurate corrections for the faintest stars. His updated
formulae were posted on May 31, 2002 and can be found on his
webpage at http://www.noao.edu/staff/dolphin/wfpc2_calib/.
Using this new correction, the overestimation of the Dolphin
(2001) CTE correction reported by Whitmore and Heyer (2002;
WFPC2 ISR 02-03) is eliminated to within the uncertainty of
their measurement. Therefore, our current recommendation is
to use the Dolphin (2002) formula for the CTE loss correction.
Anomalous PHOTFLAM Value for F656N Filter
L. Lubin
Based on a Help Desk call, we have discovered that the value
listed in the PHOTFLAM keyword in the image headers of data
taken in the F656N filter is incorrect. The discrepancy of
approximately 4% was due to a coarse wavelength grid being
used to compute the keyword value. We note that the values
of PHOTFLAM given in the HST Data Handbook for WFPC2 (V4.0)
or derived from computing it directly via SYNPHOT are and
have always been correct. In addition, no inconsistencies
have been detected with the PHOTFLAM value given in the
image headers for the other narrow band filters.
It is not known how long this problem has existed; however,
as of May 2002, this error has been corrected in the
On-The-Fly Reprocessing (OTFR) system. Therefore, all data
retrieved from the archive after May 2002 will have the
correct PHOTFLAM value for the F656N filter.
+----------------------------------------------------------+
| Recent WFPC2-related Preprints
+----------------------------------------------------------+
We draw your attention to these papers, based on WF/PC and
WFPC2 data, that will appear in the next few months. This
list includes all preprints received by the STScI Library
not yet published in the journals. Please remember to
include our Library in your preprint distribution list.
BALLY, J.; HEATHCOTE, S.; REIPURTH, B.; MORSE, J.; HARTIGAN,
P.; SCHWARTZ, R. "Hubble Space Telescope Observations of
Proper Motions in Herbig-Haro Objects 1 and 2" AJ 123:
2627-2657, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002AJ....123.2627B
BALOGH, M.L.; SMAIL, I.; BOWER, R.G.; ZIEGLER, B.L.; SMITH,
G.P.; DAVIES, R.L.; GAZTELU, A.; KNEIB, J.-P.; EBELING, H.
"Distinguishing Local and Global Influences on Galaxy
Morphology: a Hubble Space Telescope Comparison of High and
Low X-ray Luminosity Clusters" ApJ 566: 123-136, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002ApJ...566..123B
BARMBY, P.; HOLLAND, S.; HUCHRA, J.P. "M31 Globular Clusters
in the Hubble Space Telescope Archive. II. Structural
Parameters" AJ 123: 1937-1952, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002AJ....123.1937B
BELLAZZINI, M.; FUSI PECCI, F.; MESSINEO, M.; MONACO, L.;
ROOD, R.T. "Deep Hubble Space Telescope WFPC2 Photometry of
NGC 288. I. Binary Systems and Blue Stragglers" AJ 123:
1509-1527, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002AJ....123.1509B
BELLAZZINI, M.; FUSI PECCI, F.; MONTEGRIFFO, P.; MESSINEO, M.;
MONACO, L.; ROOD, R.T. "Deep Hubble Space Telescope WFPC2
Photometry of NGC 288. II. The Main-Sequence Luminosity
Function" AJ 123: 2541-2551, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002AJ....123.2541B
BENEDICT, G.F.; HOWELL, D.A.; JORGENSEN, I.; KENNEY, J.D.P.;
SMITH, B.J. "NGC 4314. IV. Photometry of Star Clusters with
the Hubble Space Telescope. History of Star Formation in the
Vicinity of a Nuclear Ring" AJ 123: 1411-1432, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002AJ....123.1411B
BERNSTEIN, R.A.; FREEDMAN, W.L.; MADORE, B.F. "The First
Detections of the Extragalactic Background Light at 3000,
5500, and 8000 A. I. Results" ApJ 571: 56-84, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002ApJ...571...56B
BESWICK, R.J.; PEDLAR, A.; HOLLOWAY, A.J. "A Radio Study of
Neutral Gas and Dust in the Radio Galaxy 3C 293" MNRAS 329:
620-628, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002MNRAS.329..620B
BILLETT, O.H.; HUNTER, D.A.; ELMEGREEN, B.G. "Compact Star
Clusters in Nearby Dwarf Irregular Galaxies" AJ 123:
1454-1475, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002AJ....123.1454B
BIRETTA, J.A.; MARTEL, A.R.; MCMASTER, M.; SPARKS, W.B.; BAUM,
S.A.; MACCHETTO, F.; MCCARTHY, P.J. "An HST Emission-Line
Imaging Survey of 3CR Radio Galaxies" NewAR 46: 181-186, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002NewAR..46..181B
BLOOM, J.S.; KULKARNI, S.R.; PRICE, P.A.; REICHART, D.; GALAMA,
T.J.; SCHMIDT, B.P.; FRAIL, D.A.; BERGER, E.; MCCARTHY, P.J.;
CHEVALIER, R.A.; WHEELER, J.C.; HALPERN, J.P.; FOX, D.W.;
DJORGOVSKI, S.G.; HARRISON, F.A.; SARI, R.; AXELROD, T.S.;
KIMBLE, R.A.; HOLTZMAN, J.; HURLEY, K.; FRONTERA, F.; PIRO, L.;
COSTA, E. "Detection of a Supernova Signature Associated with
GRB 011121" ApJ 572: L45-L49, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002ApJ...572L..45B
BOKER, T.; LAINE, S.; VAN DER MAREL, R.P.; SARZI, M.; RIX,
H.-W.; HO, L.C.; SHIELDS, J.C. "A Hubble Space Telescope Census
of Nuclear Star Clusters in Late-Type Spiral Galaxies. I.
Observations and Image Analysis" AJ 123: 1389-1410, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002AJ....123.1389B
BOND, H.E.; POLLACCO, D.L. "HST Observations of Sakurai's
Object (V4334 Sgr) and Related Stars" Ap&SS 279: 31-37, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002Ap%26SS.279...31B
BROCKSOPP, C.; BODE, M.F.; EYRES, S.P.S.; CROCKER, M.M.;
DAVIS, R.; TAYLOR, A.R. "The Central Binary and Surrounding
Nebula of the Symbiotic Star V1016 Cygni" ApJ 571: 947-954,
2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002ApJ...571..947B
BROTHERTON, M.S.; GRABELSKY, M.; CANALIZO, G.; VAN BREUGEL,
W.; FILIPPENKO, A.V.; CROOM, S.; BOYLE, B.; SHANKS, T.
"Hubble Space Telescope Imaging of the Poststarburst Quasar
UN J1025-0040: Evidence for Recent Star Formation" PASP 114:
593-601, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002PASP..114..593B
CANNON, J.M.; SKILLMAN, E.D.; GARNETT, D.R.; DUFOUR, R.J.
"Dust in I Zw 18 from Hubble Space Telescope Narrowband
Imaging" ApJ 565: 931-940, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002ApJ...565..931C
CAPETTI, A.; CELOTTI, A.; CHIABERGE, M.; DE RUITER, H.R.;
FANTI, R.; MORGANTI, R.; PARMA, P. "The HST Survey of the B2
Sample of Radio-Galaxies: Optical Nuclei and FR I/BL Lac
Unified Scheme" A&A 383: 104-111, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002A%26A...383..104C
CHEN, C.-H.R.; CHU, Y.-H.; GRUENDL, R.; LAI, S.-P. "A
Critical Examination of Hypernova Remnant Candidates in M101.
II. NGC 5471B" AJ 123: 2462-2472, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002AJ....123.2462C
CONTINI, M.; RADOVICH, M.; RAFANELLI, P.; RICHTER, G.M.
"The Interpretation of the Emission Spectra of the Seyfert 2
Galaxy NGC 7130: Determination of the Active Galactic Nucleus
and Starburst Contributions" ApJ 572: 124-139, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002ApJ...572..124C
CRAMPTON, D.; SCHADE, D.; HAMMER, F.; MATZKIN, A.; LILLY,
S.J.; LE FEVRE, O. "The Gravitational Lens CFRS 03.1077" ApJ
570: 86-91, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002ApJ...570...86C
DE GRIJS, R.; GILMORE, G.F.; JOHNSON, R.A.; MACKEY, A.D.
"Mass Segregation in Young Compact Star Clusters in the Large
Magellanic Cloud -- II. Mass Functions" MNRAS 331: 245-258,
2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002MNRAS.331..245D
DE GRIJS, R.; JOHNSON, R.A.; GILMORE, G.F.; FRAYN, C.M.
"Mass Segregation in Young Compact Star Clusters in the Large
Magellanic Cloud -- I. Data and Luminosity Functions" MNRAS
331: 228-244, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002MNRAS.331..228D
DOHM-PALMER, R.C.; SKILLMAN, E.D.; MATEO, M.; SAHA, A.;
DOLPHIN, A.; TOLSTOY, E.; GALLAGHER, J.S.; COLE, A.A. "Deep
Hubble Space Telescope Imaging of Sextans A. I. The Spatially
Resolved Recent Star Formation History" AJ 123: 813-831, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002AJ....123..813D
DOLPHIN, A.E.; KENNICUTT, R.C. JR. "Hubble Space Telescope
Survey of Clusters in Nearby Galaxies. I. Detection and
Photometry" AJ 123: 207-224, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002AJ....123..207D
DONAHUE, M.; MACK, J. "HST NICMOS and WFPC2 Observations of
Molecular Hydrogen and Dust in the Central Galaxies in
Cluster Cooling Flows" NewAR 46: 155-158, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002NewAR..46..155D
DURRELL, P.R.; CIARDULLO, R.; FELDMEIER, J.J.; JACOBY, G.H.;
SIGURDSSON, S. "Intracluster Red Giant Stars in the Virgo
Cluster" ApJ 570: 119-131, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002ApJ...570..119D
EDMONDS, P.D.; HEINKE, C.O.; GRINDLAY, J.E.; GILLILAND, R.L.
"Hubble Space Telescope Detection of a Quiescent Low-Mass
X-ray Binary Companion in 47 Tucanae" ApJ 564: L17-L20, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002ApJ...564L..17E
ELMEGREEN, D.M.; CHROMEY, F.R.; MCGRATH, E.J.; OSTENSON, J.M.
"Circumnuclear Star Formation in the Spiral Galaxy NGC 3310"
AJ 123: 1381-1388, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002AJ....123.1381E
ELMEGREEN, D.M.; ELMEGREEN, B.G.; EBERWEIN, K.S. "Dusty
Acoustic Turbulence in the Nuclear Disks of Two Liner Galaxies
NGC 4450 and NGC 4736" ApJ 564: 234-243, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002ApJ...564..234E
FARRAH, D.; VERMA, A.; OLIVER, S.; ROWAN-ROBINSON, M.; MCMAHON,
R. "Hubble Space Telescope Wide Field Planetary Camera 2
Observations of Hyperluminous Infrared Galaxies" MNRAS 329:
605-619, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002MNRAS.329..605F
FAURE, C.; COURBIN, F.; KNEIB, J.P.; ALLOIN, D.; BOLZONELLA,
M.; BURUD, I. "The Lensing System towards the Doubly Imaged
Quasar SBS 1520+530" A&A 386: 69-86, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002A%26A...386...69F
FEINSTEIN, C.; MACCHETTO, F.D.; MARTEL, A.R.; SPARKS, W.B.
"Filaments and Ionized Gas in the Vicinity of 3C 244.1" ApJ
565: 125-130, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002ApJ...565..125F
FELTZING, S.; JOHNSON, R.A. "A New, Cleaner Colour-Magnitude
Diagram for the Metal-Rich Globular Cluster NGC 6528.
Velocity Dispersion in the Bulge, Age and Proper Motion of
NGC 6528" A&A 385: 67-86, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002A%26A...385...67F
FERGUSON, H.C.; DICKINSON, M.; PAPOVICH, C. "Lyman Break
Galaxies and the Reionization of the Intergalactic Medium"
ApJ 569: L65-L68, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002ApJ...569L..65F
FORTE, J.C.; BASSINO, L.P.; VEGA, E.I.; PELLIZZA GONZALEZ,
L.J.; CELLONE, S.A.; MENDEZ, M.R. "A Polarimetric Survey for
Dust in 47 Tucanae" AJ 123: 3263-3276, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002AJ....123.3263F
FRANSSON, C.; CHEVALIER, R.A.; FILIPPENKO, A.V.; LEIBUNDGUT,
B.; BARTH, A.J.; FESEN, R.A.; KIRSHNER, R.P.; LEONARD, D.C.;
LI, W.; LUNDQVIST, P.; SOLLERMAN, J.; VAN DYK, S.D. "Optical
and Ultraviolet Spectroscopy of SN 1995N: Evidence for Strong
Circumstellar Interaction" ApJ 572: 350-370, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002ApJ...572..350F
GAL-YAM, A.; MAOZ, D.; SHARON, K. "Supernovae in Deep Hubble
Space Telescope Galaxy Cluster Fields: Cluster Rates and
Field Counts" MNRAS 332: 37-48, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002MNRAS.332...37G
GALLAGHER, J.S.; SPARKE, L.S.; MATTHEWS, L.D.; FRATTARE, L.M.;
ENGLISH, J.; KINNEY, A.L.; IODICE, E.; ARNABOLDI, M. "Wide
Field Planetary Camera 2 Observations of the Polar Ring
Galaxy NGC 4650A" ApJ 568: 199-209, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002ApJ...568..199G
GRUENDL, R.A.; CHU, Y.-H.; VAN DYK, S.D.; STOCKDALE, C.J.
"Narrow Lines in Type II Supernovae: Probing the Circumstellar
Nebulae of the Progenitors" AJ 123: 2847-2856, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002AJ....123.2847G
HARRIS, W.E.; HARRIS, G.L.H. "The Halo Stars in NGC 5128. III.
An Inner Halo Field and the Metallicity Distribution" AJ 123:
3108-3123, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002AJ....123.3108H
HENNEY, W.J.; O'DELL, C.R.; MEABURN, J.; GARRINGTON, S.T.;
LOPEZ, J.A. "Mass Loss and Jet Outflow in the Orion Nebula
Proplyd LV 2" ApJ 566: 315-331, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002ApJ...566..315H
HEYDARI-MALAYERI, M.; CHARMANDARIS, V.; DEHARVENG, L.;
MEYNADIER, F.; ROSA, M.R.; SCHAERER, D.; ZINNECKER, H.
"Resolving the Compact H II Regions in N160A with HST" A&A
381: 941-950, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002A%26A...381..941H
HUTCHINGS, J.B.; FRENETTE, D.; HANISCH, R.; MO, J.; DUMONT,
P.J.; REDDING, D.C.; NEFF, S.G. "Imaging of z ~ 2 QSO Host
Galaxies with the Hubble Space Telescope" AJ 123: 2936-2944,
2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002AJ....123.2936H
HUTCHINGS, J.B.; SAINTONGE, A.; SCHADE, D.; FRENETTE, D.
"Galaxy Morphology in the Rich Cluster Abell 2390" AJ 123:
1826-1837, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002AJ....123.1826H
IM, M.; SIMARD, L.; FABER, S.M.; KOO, D.C.; GEBHARDT, K.;
WILLMER, C.N.A.; PHILLIPS, A.; ILLINGWORTH, G.; VOGT, N.P.;
SARAJEDINI, V.L. "The DEEP Groth Strip Survey. X. Number
Density and Luminosity Function of Field E/S0 Galaxies at
z < 1" ApJ 571: 136-171, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002ApJ...571..136I
IODICE, E.; ARNABOLDI, M.; DE LUCIA, G.; GALLAGHER, J.S. III;
SPARKE, L.S.; FREEMAN, K.C. "The Puzzle of the Polar Structure
in NGC 4650A" AJ 123: 195-206, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002AJ....123..195I
JESTER, S.; ROSER, H.-J.; MEISENHEIMER, K.; PERLEY, R. "X-rays
from the Jet in 3C 273: Clues from the Radio-Optical Spectra"
A&A 385: L27-L30, 2002
http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002A%26A...385L..27J
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