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2022B Approved Science Program

A total of 70 proposals requesting NSF-funded “open skies” time were submitted to the Green Bank Observatory’s Robert C. Byrd Green Bank Telescope (GBT) for the February 1, 2022 semester 22B deadline. The table below summarizes the approved observing programs. Listed are the PI name, proposal ID, proposal title, maximum hours approved, and proposal type (Regular, Triggered, Large or External). Proposals from previous semesters that were awarded time in the 22B semester are included. The table also includes HSA and GMVA proposals that were awarded time on the GBT as a VLBI station as well as proposals accepted via external agreements with CHANDRA, Hubble Space Telescope, FERMI, SOFIA, Swift, and XMM.

For each approved program, the Proposal Finder Tool will have access to its author, title, abstract and total approved hours.

A description of the Time Allocation Committee report for 22B can be found here.

Archibald, AnneGBT22A-358Continued Timing of a Millisecond Pulsar in a Stellar Triple System50Regular
Bastian, TimGBT22A-360Probing the Inner Heliosphere with Pulsars: a Pilot Study10Regular
Bhakta, DevenGBT22B-270Searching for Globular Cluster Pulsars10Regular
Bilous, AnyaGBT22B-266Zooming in on Pulsar Microstructure to understand Fast Radio Bursts18Regular
Bolatto, AlbertoGBT21B-024GBT EDGE: A Representative Survey of the z=0 Universe with Full IFU Spectroscopy300Large
Bublitz, JesseGBT22B-250Refining the Molecular Gas Enigma: Mapping NGC 6781 at 3mm16.5Regular
Busch, MichaelGBT22A-434SC:Mapping molecular clouds in OH from diffuse to high-mass star forming regions300Large
Caleb, ManishaVLBA22B-074Probing the local environment of FRB 20190714A6.5Regular
Calore, FrancescaGBT22B-112Follow-up of bulge MSP candidates detected by both Chandra and VLA24.5Regular
Cameron, AndrewGBT22A-118Continued observations of an eccentric, relativistic binary pulsar.57Regular
Dai, ShiGBT22B-030Monitoring the active repeater FRB 20190520B24Regular
Dong, AdamGBT22B-213GBT Follow-up of a Novel Repeating Galactic Transient Detected with CHIME/FRB32Regular
Emig, KimberlyGBT22B-170Recombination Lines from Diffuse Ionized Gas in the M82 Starburst8.75Regular
Fonseca, EmmanuelGBT22B-215Followup Timing of Low-declination GBNCC Pulsars10Regular
Frayer, DavidGBT22B-162GBT HI Observations of the GOALS LIRG 3C842Regular
Freire, PauloGBT22B-143Following two potentially super-massive pulsars in NGC 6624 and NGC 185113Regular
Gallimore, JackVLBA22B-148OH Masers in the Water Megamaser Disk of NGC 106812Regular
Goldsmith, PaulGBT22B-011A Novel Technique for Electron Density Determination18Regular
Gorai, PrasantaGBT22A-398Exploring Carbon Chain Chemistry of Massive Protostars22Regular
Gupta, HarshalGBT21B-316Molecular Exploration of the Diffuse Interstellar mediUM (MEDIUM)285.75Large
Huang, JaneGBT22B-085Mapping the Delivery of Material to a Planet-forming Disk – copy2Regular
Issaoun, SaraGMVA22B-249Resolving Polarization in Sgr A* with GMVA+ALMA10Regular
Jones, MichaelGBT22B-064Cold gas reservoirs of satellites in nearby Milky Way-like systems96.5Regular
Kooi, JasonGBT22A-404Probing Fluctuations in the Solar Wind with Pulsars: a Pilot Study17Regular
Kramer, MichaelGBT22B-231Timing and General Relativity in the Double Pulsar System101Regular
Lockman, FelixGBT22B-204The Ophiuchus Superbubble — Connecting the Disk to the Halo115.5Regular
Lowe, IanGBT22B-068A Multi-Scale, Multi-Wavelength Study of Dust in Molecular Cloud Filaments II21.5Regular
Luo, JingGBT22B-269PSR J2108+45 with a massive companion and dense circumstellar environment36.5Regular
Maan, YogeshGBT22B-104Transient radio emission from magnetars and connection with FRBs23.75Triggered
Margot, Jenan-LucGBT22B-209A search for technosignatures around newly discovered exoplanets
Mason, BrianGBT22B-242Measuring 3mm Source Contamination in the ACT Galaxy Cluster Sample18.75Regular
Maureira, Maria JoseGBT22B-180CO freeze-out across a filamentary dense cloud forming a quadruple system25.5Regular
McKean, JohnVLBA21B-289Resolving the nature of quasar flux-ratio anomalies in gravitational lenses60Regular
Naidu, ShantanuGBT22B-226Bistatic Goldstone-GBT Radar Imaging of Binary Near-Earth Asteroid Didymos25Regular
O’Neil, KarenGBT22B-065Hunting for Massive Low Surface Brightness Galaxies128.75Regular
Park, JonghoGMVA22B-100A Multicolor View of the Black Hole Environment in M8728Regular
Ransom, ScottGBT22B-256Long Term Timing of 65 Recycled Pulsars in Bulge Globular Clusters75Regular
Redaelli, ElenaGBT22B-052A crucial test for the mass of prestellar cores in a high-mass clump2Regular
Ribaudo, JosephGBT22A-430The Baryonic Tully-Fisher Relation for Galaxies with Supernova Distances132Regular
Roberts, HayleyGBT22B-060Understanding the role of dense gas in the most extreme OH megamasers34.75Regular
Roth, NathanGBT22B-176Measuring NH3 and OH in a Target of Opportunity Comet with the GBT7.5Triggered
Salas, PedroGBT22A-269Probing the C+/C interface in the Orion Bar16.5Regular
Salas, PedroGBT22A-437SC: GBT Diffuse Ionized Gas Survey at Low frequencies – GDIGS-Low826Large
Salome, QuentinGBT22B-049A survey of atomic gas in NLSy1 galaxies with X-ray Ultra Fast Outflows31.25Regular
Sanchez, MonicaGBT22B-228Observations of Marginal Arecibo HI 21cm Detections in the Zone of Avoidance4.5Regular
Schmiedeke, AnikaGBT22B-191Feeding a super-critical filament in a subsonic core17.5Regular
Scibelli, SamanthaGBT22A-435SC: Q- Band Chemical Complexity Survey of Prestellar Core L1544647Large
Singal, JackGBT19A-083How Bright is the Radio Sky? A 310 MHz Absolute Map30Regular
Song, YiqingGBT22B-248Mapping HCN and HCO+ in Local Luminous Infrared Mergers19.5Regular
Spekkens, KristineGBT22B-139Atomic Gas in the Host Galaxies of Gravitational Wave Events – LVK O440Triggered
Spezzano, SilviaGBT22B-040Exploring the chemistry of Sulfur towards the young starless core L1521E18Regular
Sridharan, T.K.GBT22A-366Path to Precision Astrochemistry with Magnetars II – mm-wave Observations33Regular
Stark, DavidGBT22A-325Understanding diverse HI depletion times in MaNGA star forming galaxies79.25Regular
Stark, DavidGBT22A-436SC: Robust Gas Measurements for BreakBRD Galaxies206.5Large
Traianou, EfthaliaGMVA21B-164Moving and stationary shocks interaction after a gamma-ray flare in TXS2013+37027Regular
Valdivia Mena, Maria TeresaGBT22B-163Mind the gap: connecting the scales between filaments and protostars18Regular
Wen, DiG22A001A magnified view of an ionised scattering medium in a z= 1.145 late- type galaxy36Regular
Wolszczan, AlexanderGBT22B-200A search for planets around white dwarfs18Regular
Yang, ChentaoGBT22B-020Confirming the nature of a 380GHz H2O maser disk in a lensed quasar at z=3.9114Regular

Volunteers Build Bird Boxes to Support Local Ecosystems & Citizen Science

This past spring, the Green Bank Observatory and the Appalachian Forest National Heritage Area hosted an event with the Deer Creek Defenders 4-H club to build nesting boxes for the Green Bank and Arborvale bird population. This project was managed by AmeriCorp staffer Joe Medica.

Volunteers and their bird boxes, Joe Medica pictured top right.

Celebrate the Supermoon Total Lunar Eclipse at Green Bank Observatory

A Blood Moon eclipse, image credit NASA.

Sunday, May 15th a total lunar eclipse of a supermoon will be visible to most of us in West Virginia (weather permitting) between the hours of 10:30pm and 2am Eastern Time. The start and end of the lunar eclipse’s ‘totality’ is between 11:30pm and 1am. No special equipment is needed to view a lunar eclipse, although an optical telescope or binoculars can make it more exciting!


K-Band Science Using the Green Bank Telescope

19th – 21st September 2022, Green Bank, WV

Green Bank Observatory (GBO) is planning a workshop on K-band science, past, present and future, covering science that has utilized/will utilize the Green Bank Telescope (GBT). The goals of this workshop are threefold:

  1. Celebrate the success of prior observing campaigns and the K-band Focal Plane Array (KFPA), while encouraging use of the available archival data;
  2. Poll the community on the science being done or proposed at K-band to establish if the GBT is able to meet those needs;
  3. Seek community input on the future direction of K-band science and instrumentation at Green Bank.

Please use the form below to pre-register for the conference. In July 2022 we will invite a shortlist of pre-registrants to attend the conference up to the capacity of the observatory site. We intend to provide virtual access to some portions of the workshop, although the exact format has yet to be determined.

Scientific Rationale

With the sensitivity arising from the large collecting area of the GBT and clean radio-frequency environment of the Green Bank site, the KFPA has been a popular instrument among GBT users, including those in the areas of galaxy evolution, planetary systems, as well as astrochemistry. The primary use of the KFPA, however, has been to observe star-forming material in Galactic clouds. In the last few years three separate large-scale surveys have used the GBT and KFPA to map out the moderately-dense gas tracer of ammonia in our galaxy. These surveys (KEYSTONE, GAS and RAMPS: Keown et al, 2019; Friesen et al, 2017 & Hogge et al, 2018, respectively) are now complete and the data are becoming available to the public. Green Bank Observatory is also now considering what potential future instrumentation might best serve the astronomical community at K-band. A white paper to the decadal survey recently proposed a phased-array feed and the Astro2020 panel recommendations included radio cameras as one of four key areas in which “outstanding opportunities exist for new mid-scale facilities to address compelling science questions.” 

It is timely for GBO to host scientists working at the K-band range of frequencies, evaluate the current state of the science and seek new directions in both the scientific research and instrumentation capabilities.


All presentations and discussions were recorded, and will be available here:

Scientific Organizing Committee

  • Head: Larry Morgan (GBO) – ude.o1665159139arn@n1665159139agrom1665159139l1665159139
  • Will Armentrout (GBO)
  • Natalie Butterfield (Villanova University)
  • Tierra Candelaria (NRAO)
  • Ilsa Cooke (University of British Columbia)
  • Rachel Friesen (University of Toronto)
  • Jim Jackson (GBO)
  • Pedro Salas (GBO)
  • Ci Xue (MIT)

Structure of the Workshop

In the tradition of past Green Bank workshops the total number of participants will be limited (~50 people) which allows for candid discussions. The workshop will be held over ~3 days. Only a limited number of talks will be given which will allow ample time for discussion. Talks given will focus on survey results and the dissemination of those data, new results and general reviews. There will be a session dedicated to future instrumentation, both to evaluate community requirements and to explore the potential options for the GBT. There will be space and time for poster presentations. The detailed schedule of the workshop, such as the number and length of talks will be determined at a later date. We hope to provide virtual access to all main talks; other aspects of the workshop (i.e. panels and evening lectures) may remain in-person only.


  • GBT Surveys – RAMPS, GAS, KEYSTONE, etc.
  • Astrochemistry 
  • Extragalactic Observations – Masers
  • Other K-Band Projects
  • Data Reduction Pipelines and Archive Data Products
  • Instrumentation – Current and Future

Local Organizing Committee

  • Head: Pedro Salas
  • Mark Barnes
  • Brenne Gregory
  • Sue Shears
  • Anika Schmiedeke
  • Madge Vosteen

List of Participants

Kiran Adhikari (Tribhuvan University)
Jordan Guerra Aguilera (Villanova University)
Kevin Bandura (West Virginia University)
David Blank (USQ)
Jim Braatz (NRAO)
Andrew Burkhardt (Worcester State University)
Natalie Butterfield (NRAO)
Alex Byrne (Massachusetts Institute of Technology)
Victoria Catlett (Green Bank Observatory)
Shubhadip Chakraborty (IPR, Université de Rennes 1)
Ilsa Cooke (University of British Columbia)
Neeraj Dapurkar (Fergusson College, Pune)
David Eden (Armagh Observatory and Planetarium)
Golshan Ejlali (IPM)
Zachary Fried (MIT)
Harshal Gupta (National Science Foundation)
Jim Jackson (GBO)
Simranjeet Kaur (IISER Mohali)
Helen Kirk (Herzberg Astronomy & Astrophysics Resesarch Centre, National Research Council of Canada)
Juan Li (Shanghai Astronomical Observatory, CAS)
Xing Lu (Shanghai Astronomical Observatory)
Brett McGuire (MIT)
Anthony Minter (Green Bank Observatory)
Larry Morgan (Green Bank Observatory)
Rahul Musale (University of Pune)
Jaime Pineda (MPE, Germany)
Jian-Jie Qiu (Sun Yat-Sen University)
Federico Radiconi (University of Rome, La Sapienza)
Anthony Remijan (NRAO)
Pedro Salas (GBO)
Anika Schmiedeke (GBO)
Samantha Scibelli (University of Arizona)
Sue Shears (Green Bank Observatory)
Bob Simon (GBO)
Brian Svoboda (NRAO)
Hannah Toru (Shay) (MIT)
James Urquhart (University of Kent)
Karl Warnick (Brigham Young University)
Ellie White (Green Bank Observatory)
Glenn White (Rutherford Lab UK, and Open University, UK)
Steve White (GBO)
Jinjin Xie (Shanghai Astronomical Observatory)
Ceci Xue (MIT)