Hopskotch Topics

In the Hopskotch messaging system, public topics are topics to which any registered SCiMMA user may subscribe. Private topics are restricted channels intended for communication within a specific collaboration or working group.

SCiMMA currently supports 591 private topics and 216 public topics.

Active Public Topics

The sections below list the 92 public topics which are being archived and have had activity within the past 90 days, organized by the groups which own them. These represent the communication channels currently in use across the SCiMMA community.

Individuals who are not yet registered may create a free account using the sign‑up link at www.scimma.org. Registered users may subscribe to any public topic.


TopicDescriptionLast Published
amon.nuem AMON neutrino+gamma-ray multi-messenger alerts 2026-04-06
TopicDescriptionLast Published
ampel.lsst.extragalactic-transients This topic provides transient event reports generated by the DESY / HUB AMPEL instance using real-time alerts from the Vera C. Rubin Observatory (VRO). Alerts are selected as likely extragalactic transient events where a high quality photometric classification can be made. Classifications are made using the best performing transient classifier of the ELAsTiCC challenge and combines encoder-decoder and boosted decision tree algorithms. The classifier minimally requires four separate photometric detections as well as a distance (redshift) estimate. The latter based on the most nearby galaxy and is determined based on spectroscopic redshifts where available, otherwise photometric galaxy redshifts. Each report contains the original VRO photometry along with additional derived quantities produced by the AMPEL processing pipeline. The AmpelAccess Repository provides tools for accessing nd parsing these reports: https://github.com/AmpelAstro/Ampel-Access. For more information regarding the AMPEL processing platform, see: * Project gateway: https://ampelastro.github.io/ * Classifier overview: https://doi.org/10.1051/0004-6361/202452481 2026-06-30
ampel.lsst.extragalactic-infants This topic provides transient event reports generated by the DESY / HUB AMPEL instance using real-time alerts from the Vera C. Rubin Observatory (VRO). Alerts are filtered to identify candidate infant extragalactic transients, optimized for teams aiming to exploit the depth of VRO to observe events at very early phases, close to the initial outburst. Core selection criteria include not having a previous history of variability, being in the vicinity of a nearby galaxy and being outside of the Milky Way plane. Each report contains the original VRO photometry along with additional derived quantities produced by the AMPEL processing pipeline. The AmpelAccess repository provides tools for accessing and parsing these reports: https://github.com/AmpelAstro/Ampel-Access For more information regarding the AMPEL processing platform, see: * Project gateway: https://ampelastro.github.io/ * Classifier overview: https://doi.org/10.1051/0004-6361/202452481 2026-06-30
TopicDescriptionLast Published
gcn.classic.voevent.SWIFT_POINTDIR Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.SWIFT_POINTDIR 2026-07-01
gcn.classic.text.SWIFT_POINTDIR Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.SWIFT_POINTDIR 2026-07-01
gcn.classic.text.FERMI_LAT_POS_TEST Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.FERMI_LAT_POS_TEST 2026-07-01
gcn.classic.voevent.FERMI_LAT_POS_TEST Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.FERMI_LAT_POS_TEST 2026-07-01
gcn.classic.text.SWIFT_ACTUAL_POINTDIR Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.SWIFT_ACTUAL_POINTDIR 2026-07-01
gcn.classic.voevent.SWIFT_ACTUAL_POINTDIR Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.SWIFT_ACTUAL_POINTDIR 2026-07-01
gcn.notices.icecube.test.gold_bronze_track_alerts Mirror of kafka://kafka.gcn.nasa.gov/gcn.notices.icecube.test.gold_bronze_track_alerts 2026-07-01
gcn.classic.text.TEST_COORDS Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.TEST_COORDS 2026-07-01
gcn.classic.voevent.TEST_COORDS Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.TEST_COORDS 2026-07-01
gcn.classic.text.MAXI_TEST Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.MAXI_TEST 2026-07-01
gcn.classic.voevent.MAXI_TEST Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.MAXI_TEST 2026-07-01
gcn.classic.text.SWIFT_BAT_GRB_POS_TEST Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.SWIFT_BAT_GRB_POS_TEST 2026-07-01
gcn.classic.voevent.SWIFT_BAT_GRB_POS_TEST Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.SWIFT_BAT_GRB_POS_TEST 2026-07-01
gcn.classic.text.AGILE_GRB_POS_TEST Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.AGILE_GRB_POS_TEST 2026-07-01
gcn.classic.voevent.AGILE_GRB_POS_TEST Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.AGILE_GRB_POS_TEST 2026-07-01
gcn.classic.text.FERMI_GBM_POS_TEST Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.FERMI_GBM_POS_TEST 2026-07-01
gcn.classic.voevent.FERMI_GBM_POS_TEST Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.FERMI_GBM_POS_TEST 2026-07-01
gcn.classic.text.HETE_TEST Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.HETE_TEST 2026-07-01
gcn.classic.voevent.HETE_TEST Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.HETE_TEST 2026-07-01
gcn.classic.text.UNKNOWN Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.UNKNOWN 2026-07-01
gcn.classic.voevent.UNKNOWN Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.UNKNOWN 2026-07-01
gcn.classic.text.IPN_RAW Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.IPN_RAW 2026-07-01
gcn.classic.voevent.IPN_RAW Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.IPN_RAW 2026-07-01
gcn.classic.text.KONUS_LC Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.KONUS_LC 2026-07-01
gcn.classic.voevent.KONUS_LC Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.KONUS_LC 2026-07-01
gcn.classic.text.CALET_GBM_FLT_LC Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.CALET_GBM_FLT_LC 2026-07-01
gcn.classic.voevent.CALET_GBM_FLT_LC Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.CALET_GBM_FLT_LC 2026-07-01
gcn.circulars Mirror of kafka://kafka.gcn.nasa.gov/gcn.circulars 2026-07-01
gcn.classic.text.FERMI_GBM_GND_INTERNAL Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.FERMI_GBM_GND_INTERNAL 2026-07-01
gcn.classic.voevent.FERMI_GBM_GND_INTERNAL Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.FERMI_GBM_GND_INTERNAL 2026-07-01
gcn.classic.text.FERMI_GBM_FLT_POS Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.FERMI_GBM_FLT_POS 2026-07-01
gcn.classic.voevent.FERMI_GBM_FLT_POS Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.FERMI_GBM_FLT_POS 2026-07-01
gcn.notices.svom.voevent.grm Mirror of kafka://kafka.gcn.nasa.gov:9092/gcn.notices.svom.voevent.grm 2026-07-01
gcn.classic.text.FERMI_GBM_ALERT Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.FERMI_GBM_ALERT 2026-07-01
gcn.classic.voevent.FERMI_GBM_ALERT Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.FERMI_GBM_ALERT 2026-07-01
gcn.classic.voevent.FERMI_GBM_SUBTHRESH Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.FERMI_GBM_SUBTHRESH 2026-07-01
gcn.classic.text.FERMI_GBM_SUBTHRESH Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.FERMI_GBM_SUBTHRESH 2026-07-01
gcn.classic.text.FERMI_GBM_FIN_POS Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.FERMI_GBM_FIN_POS 2026-06-30
gcn.classic.voevent.FERMI_GBM_FIN_POS Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.FERMI_GBM_FIN_POS 2026-06-30
gcn.classic.text.FERMI_GBM_GND_POS Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.FERMI_GBM_GND_POS 2026-06-30
gcn.classic.voevent.FERMI_GBM_GND_POS Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.FERMI_GBM_GND_POS 2026-06-30
gcn.notices.superk.sn_alert Mirror of kafka://kafka.gcn.nasa.gov:9092/gcn.notices.superk.sn_alert 2026-06-30
gcn.classic.text.SK_SN Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.SK_SN 2026-06-30
gcn.classic.voevent.SK_SN Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.SK_SN 2026-06-30
gcn.classic.text.FERMI_GBM_FLT_INTERNAL Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.FERMI_GBM_FLT_INTERNAL 2026-06-30
gcn.classic.voevent.FERMI_GBM_FLT_INTERNAL Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.FERMI_GBM_FLT_INTERNAL 2026-06-30
gcn.classic.text.FERMI_GBM_ALERT_INTERNAL Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.FERMI_GBM_ALERT_INTERNAL 2026-06-30
gcn.classic.voevent.FERMI_GBM_ALERT_INTERNAL Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.FERMI_GBM_ALERT_INTERNAL 2026-06-30
gcn.classic.text.COINCIDENCE Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.COINCIDENCE 2026-06-30
gcn.classic.voevent.COINCIDENCE Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.COINCIDENCE 2026-06-30
gcn.notices.chime.frb Mirror of kafka://kafka.gcn.nasa.gov:9092/gcn.notices.chime.frb 2026-06-30
gcn.classic.text.SNEWS Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.SNEWS 2026-06-30
gcn.classic.voevent.SNEWS Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.SNEWS 2026-06-30
gcn.classic.text.LVC_RETRACTION Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.LVC_RETRACTION 2026-06-30
gcn.classic.voevent.LVC_RETRACTION Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.LVC_RETRACTION 2026-06-30
gcn.classic.text.MAXI_KNOWN Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.MAXI_KNOWN 2026-06-29
gcn.classic.voevent.MAXI_KNOWN Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.MAXI_KNOWN 2026-06-29
gcn.notices.einstein_probe.wxt.alert Mirror of kafka://kafka.gcn.nasa.gov/gcn.notices.einstein_probe.wxt.alert 2026-06-27
gcn.classic.voevent.ICECUBE_ASTROTRACK_BRONZE Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.ICECUBE_ASTROTRACK_BRONZE 2026-06-22
gcn.classic.text.ICECUBE_ASTROTRACK_BRONZE Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.ICECUBE_ASTROTRACK_BRONZE 2026-06-22
gcn.notices.icecube.gold_bronze_track_alerts Mirror of kafka://kafka.gcn.nasa.gov:9092/gcn.notices.icecube.gold_bronze_track_alerts 2026-06-22
gcn.notices.svom.voevent.eclairs Mirror of kafka://kafka.gcn.nasa.gov:9092/gcn.notices.svom.voevent.eclairs 2026-06-18
gcn.classic.text.FERMI_LAT_OFFLINE Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.FERMI_LAT_OFFLINE 2026-06-18
gcn.classic.voevent.FERMI_LAT_OFFLINE Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.FERMI_LAT_OFFLINE 2026-06-18
gcn.classic.text.ICECUBE_CASCADE Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.ICECUBE_CASCADE 2026-06-18
gcn.classic.voevent.ICECUBE_CASCADE Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.ICECUBE_CASCADE 2026-06-18
gcn.classic.text.ICECUBE_ASTROTRACK_GOLD Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.ICECUBE_ASTROTRACK_GOLD 2026-06-10
gcn.classic.voevent.ICECUBE_ASTROTRACK_GOLD Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.ICECUBE_ASTROTRACK_GOLD 2026-06-10
gcn.classic.text.LVC_PRELIMINARY Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.LVC_PRELIMINARY 2026-06-09
gcn.classic.voevent.LVC_PRELIMINARY Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.LVC_PRELIMINARY 2026-06-09
gcn.classic.voevent.LVC_INITIAL Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.LVC_INITIAL 2026-06-09
gcn.classic.text.LVC_INITIAL Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.LVC_INITIAL 2026-06-09
gcn.notices.dsa110.frb Mirror of kafka://kafka.gcn.nasa.gov:9092/gcn.notices.dsa110.frb 2026-05-29
gcn.notices.svom.voevent.mxt Mirror of kafka://kafka.gcn.nasa.gov:9092/gcn.notices.svom.voevent.mxt 2026-05-29
gcn.classic.voevent.SWIFT_UVOT_EMERGENCY Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.SWIFT_UVOT_EMERGENCY 2026-05-25
gcn.classic.text.SWIFT_UVOT_EMERGENCY Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.SWIFT_UVOT_EMERGENCY 2026-05-25
gcn.classic.text.AMON_NU_EM_COINC Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.AMON_NU_EM_COINC 2026-04-06
gcn.classic.voevent.AMON_NU_EM_COINC Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.AMON_NU_EM_COINC 2026-04-06
gcn.classic.text.MAXI_UNKNOWN Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.MAXI_UNKNOWN 2026-04-04
gcn.classic.voevent.MAXI_UNKNOWN Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.MAXI_UNKNOWN 2026-04-04
gcn.classic.text.FERMI_GBM_FIN_INTERNAL Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.text.FERMI_GBM_FIN_INTERNAL 2026-04-03
gcn.classic.voevent.FERMI_GBM_FIN_INTERNAL Mirror of kafka://kafka.gcn.nasa.gov/gcn.classic.voevent.FERMI_GBM_FIN_INTERNAL 2026-04-03
TopicDescriptionLast Published
hermes.test Test messages - aren't saved in production, only on the dev site 2026-06-30
hermes.photometry Target photometry data 2026-05-06
TopicDescriptionLast Published
icecube.HE-tracks High-energy track events with significant probabilities of being neutrinos of astrophysical origin. See https://gcn.gsfc.nasa.gov/doc/IceCube_High_Energy_Neutrino_Track_Alerts_v2.pdf and https://doi.org/10.22323/1.358.1021 for full details. 2026-04-24
TopicDescriptionLast Published
igwn.gwalert igwn gravitational wave alerts 2026-06-30
TopicDescriptionLast Published
tarxiv.tns Alerts for TarXiv TNS pipeline. We will publish alerts for newly ingested targets and for updates to existing targets. 2026-07-01
tarxiv.xmatch Cross-matching service multiple surveys' detection alert streams. Currently, cross-matching detections across LSST, ZTF, ASAS-SN and ATLAS in real time. 2026-04-19
TopicDescriptionLast Published
tomtoolkit.test 2026-06-26