Coordinated Observations

This table is for the coordination of past and future observations of ISO 3I/ATLAS. It is fully publicly editable via GitHub pull requests or through this Google sheet. Please do not edit other people's entries or make any major changes to the overall sheet without contacting the collaboration first. Please feel free to reach out to anyone who has indicated a willingness to share their observations and respect the decisions of those who plan to analyze their observations independently. Please scroll to the right for more information contained in the table.

Date	Lead	Email	Open to Collaboration?	Telescope/ Instrument	Observation Date [UT]	Observation Time Range [UT]	Site Code	Filter/ Bandpass	Status	Details	Additional Comments
August 12, 2025	Chansey Champagne	cc3776@nau.edu	Yes	NASA IRTF/SpeX	2025-08-05	05:39-8:51	568	0.7-2.5 um	Completed	Spectroscopy with Prism
August 12, 2025	Chansey Champagne	cc3776@nau.edu	Yes	NASA IRTF/SpeX	2025-07-25	05:58-9:02	568	0.7-2.5 um	Completed	Spectroscopy with Prism
August 12, 2025	Chansey Champagne	cc3776@nau.edu	Yes	NASA IRTF/SpeX	2025-07-04	07:34-11:40	568	0.7-2.5 um	Completed	Spectroscopy with Prism. Data reduced and available. Included in Kareta et al. (2025)
August 12, 2025	Chansey Champagne	cc3776@nau.edu	Yes	NASA IRTF/SpeX	2025-07-03	07:42-11:51	568	0.7-2.5 um	Completed	Spectroscopy with Prism. Data reduced and available. Included in Kareta et al. (2025)
August 12, 2025	Martin Cordiner	martin.cordiner@nasa.gov	No	JWST	2025-08-06	11:01 - 11:20	500@-170	300-700 nm	Completed	NIRSpec Prism IFS
August 12, 2025	Cyrielle Opitom	copitom@ed.ac.uk	Yes	VLT/MUSE	2025-08-11 to 2025-08-19		309	300-700 nm	Upcoming	High-resolution spectroscopy
August 12, 2025	Cyrielle Opitom	copitom@ed.ac.uk	Yes	VLT/MUSE	2025-08-10	~1am	309	480-930 nm	Upcoming	IFS
August 12, 2025	Cyrielle Opitom	copitom@ed.ac.uk	Yes	VLT/MUSE	2025-07-29	~1am	309	480-930 nm	Completed	IFS
August 10, 2025	Josep M. Trigo-Rodríguez	trigo@ice.csic.es	Yes	Telescope Joan Oró, Montsec, Catalonia	2025-07-05	1 UTC	C65	V,R,I	Completed	Imaging and photometry	Happy for someone else to lead.
August 10, 2025	Josep M. Trigo-Rodríguez	trigo@ice.csic.es	Yes	Deep Sky Chile at Rio Hurtado Valley	2025-07-03	5 UTC	X07		Completed	Imaging and photometry	Happy for someone else to lead.
July 17, 2025	Cyrielle Opitom	copitom@ed.ac.uk	Yes	VLT/MUSE	2025-07-16	~1am	309	480-930 nm	Completed	IFS
July 17, 2025	Cyrielle Opitom	copitom@ed.ac.uk	Yes	VLT/MUSE	2025-07-03	~1am	309	480-930 nm	Completed	IFS	Submitted to MNRAS. We will monitor every ~1.5 weeks. Open to share exact dates.
July 16, 2025	Dennis Bodewits	dennis@auburn.edu	Yes	Swift/UVOT	2025-07-11	2025-07-11 - 2025-07-13		UVW1/V	Completed	Imaging	To be included in a survey paper. Monitoring will continue every two weeks.
July 14, 2025	John Noonan	noonan@auburn.edu	Six month proprietary period	HST STIS/COS	2025-11-27	2025-11-27 - 2025-12-10	250	G160M/G230L	Upcoming	Spectroscopy	PID 17780
July 14, 2025	Matthew Belyakov	mattbel@caltech.edu	Yes	Apache Point Observatory/KOSMOS	2025-07-06		705	Blue GRISM 3800-6600 Å	Completed	Spectroscopy, only a few usable observations	To be included in a RNAAS
July 14, 2025	Matthew Belyakov	mattbel@caltech.edu	Yes	Apache Point Observatory/ARCTIC	2025-07-06		705	g/r/i/z	Completed	Imaging using a guide camera	To be included in a RNAAS
July 14, 2025	Matthew Belyakov	mattbel@caltech.edu	Yes	Palomar P200/NGPS	2025-07-03	~7:00:00 AM	675	R/I	Completed	Spectroscopy	To be included in a RNAAS
July 14, 2025	Matthew Belyakov	mattbel@caltech.edu	Yes	Palomar P200/NGPS	2025-07-03	~7:00:00 AM	675	g/r/i	Completed	Imaging using a guide camera
July 10, 2025	David Jewitt	djewitt@gmail.com	Zero month proprietary period	Hubble WFC3/UVIS	2025-07-21	TBD	250	F350LP	Upcoming	Imaging	PID 17830
July 10, 2025	Adina Feinstein	adina@msu.edu	Yes	LCO/ MuSCAT3	2025-07-12 through 2025-07-16	TBD	F65	griz	Completed		Happy for someone else to lead.
July 9, 2025	Toni Santana-Ros	tsantanaros@icc.ub.edu	Yes	HCT	2025-07-06	17:45 - 18:55	N50	r	Completed
July 9, 2025	Sam Deen	planetaryscience@yahoo.com	Yes	Deep Random Survey / 43cm	2025-07-04	04:11 - 10:00	X09	Lum	Completed	small gap from 08:09-08:39, good quality otherwise
July 8, 2025	Olivier Hainaut	ohainaut@eso.org	Yes	VLT/ FORS2	TBD	TBD	309	R	Upcoming
July 8, 2025	Olivier Hainaut	ohainaut@eso.org	Yes	VLT/ FORS2	2025-07-04	06:50 - 07:15	309	R	Completed	Good seeing for astrometry	Data are public
July 4, 2025	Tim Lister	tlister@lco.global	Yes	FTN/ MuSCAT3	2025-07-04	08:50 - 11:50	F65	griz	Completed	Multi-filter deep imaging/lightcurve