Skip to main content
JSON Notices via Email, Kafka Cron Jobs, Submitter Profile, GCN is Hiring. See news and announcements

GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

36210 results found.

  1. Konus-Wind observation of GRB 110618A
  2. IPN triangulation of GRB110618A (long duration, extremely intense)
  3. Fermi Gamma-ray Burst Monitor trigger 110621949 is not a GRB
  4. GRB 110604A: Suzaku WAM observation of the prompt emission
  5. GRB 110610A: Suzaku WAM observation of the prompt emission
  6. GRB 110610A: Fermi GBM detection
  7. GRB 110610A: 1.23m CAHA optical observations
  8. GRB 110610A: Swift-XRT refined Analysis
  9. GRB 110610A: Swift/UVOT Upper Limits
  10. GRB 110610A: Enhanced Swift-XRT position
  11. GRB 110610A: Swift-BAT refined analysis
  12. Swift detection of the X-ray afterglow of GRB 110604A
  13. GRB 110610A: MASTER-NET optical observations
  14. GRB 110610A: Swift detection of a burst
  15. Konus-Wind observation of GRB 110604A
  16. GRB 110604A Detection by IPN Spacecraft and Swift-BAT
  17. GRB 110530A: optical observations in Mondy observatory
  18. GRB 110529A: Suzaku WAM observation of the prompt emission
  19. GMRT detection of GRB 110328A
  20. GRB 110530A: optical observations at Mt. Terskol, second epoch
  21. GRB 110530A: Swift-XRT refined Analysis
  22. GRB 110530A: Swift/UVOT Detection of a Fading Afterglow
  23. GRB 110530A: Xinglong TNT observation
  24. GRB 110530A: Enhanced Swift-XRT position
  25. GRB 110530A: NOT optical observations
  26. GRB110530A: MITSuME Okayama Optical Observation
  27. GRB 110530A: optical observations at Mt. Terskol
  28. GRB 110530A: Correction to GCN Circ 12050
  29. GRB 110530A: MASTER OT observations
  30. GRB 110530A: Swift-BAT refined analysis
  31. GRB 110530A: MITSuME Akeno Optical Observation
  32. GRB 110529A: Fermi GBM detection
  33. GRB 110530A: Swift detection of a burst with an optical afterglow
  34. Konus-Wind observation of GRB 110529A
  35. LAT Observations of GRB110529A
  36. EVLA afterglow limits on the high z GRB090429B
  37. Fermi Gamma-ray Burst Monitor trigger 328195911 is not a GRB
  38. Swift J1644+57/GRB 110328A, Additional HST Observations
  39. GRB 110521A: MASTER prompt optical limit
  40. GRB 110521A: Swift/UVOT Upper Limits
  41. GRB 110521A: Swift-XRT refined analysis
  42. GRB 110520A: NOT optical follow-ups
  43. GRB 110521A - NOT optical observation
  44. GRB 110521A: Swift-BAT refined analysis
  45. GRB 110521A: Enhanced Swift-XRT position
  46. GRB 110521A: MASTER synchronous and early optical observations limit
  47. Swift/UVOT observations of GRB110520A
  48. GRB 110521A: Swift detection of a burst
  49. GRB 110520A: Swift-BAT refined analysis
  50. GRB 110520A: IAC80 I-band observations
  51. GRB 110520A: Swift-XRT refined Analysis
  52. GRB 110520A: Enhanced Swift-XRT position
  53. GRB 110520A: WHT IR observations
  54. GRB 110520A - NOT optical observation
  55. GRB 110520A: Skynet/DAO optical observations
  56. GRB 110520A: Liverpool Telescope Observations
  57. GRB 110520A: TAROT Calern observatory optical observations
  58. GRB 110520A: MASTER-NET optical observations
  59. GRB 110520A: Swift detection of a burst
  60. Konus-Wind observation of GRB 110518A
  61. IPN localization of bright GRB 110518A
  62. Radio observations of GRB 110428A with the EVLA
  63. GRB 110519A, Swift-BAT refined analysis
  64. GRB 110519A: Swift detection of a burst
  65. GRB 110503A optical observation
  66. GRB 110426A: Fermi GBM detection
  67. GRB 110428A: Fermi-GBM observation
  68. GRB 110503A: TAROT Calern observatory optical observations
  69. GRB 110503A: Jet Break seen from TLS
  70. GRB 110503A optical observations
  71. Konus-Wind observation of GRB 110503A
  72. GRB 110422A: MASTER first 30 min OT light curve
  73. GRB 110422A: Herschel FIR observation preliminary report
  74. GRB 110503A: optical observation in CrAO
  75. GRB 110503A: R-band Detection
  76. GRB 110503A: Centimeter observation from EVLA
  77. GRB 110503A: Millimeter observation from SMA
  78. GRB 110503A: SARA-N Observations and Photometric Calibration
  79. GRB 110503A: Swift/UVOT Observations
  80. GRB 110503A: Swift-XRT refined Analysis
  81. GRB 110503A: PAIRITEL NIR Detection
  82. GRB 110503A: redshift confirmation from TNG
  83. GRB 110503A - TLS Afterglow Observations
  84. GRB 110503A: Swift-BAT refined analysis
  85. GRB 110503A: NOT afterglow photometry
  86. GRB 110503A: Redshift from 10.4m GTC
  87. GRB 110503A: Enhanced Swift-XRT position
  88. GRB 110503A: Swift detection of a burst with a bright optical counterpart
  89. GRB 110426A: Swift/XRT non-detection
  90. GRB 110428A : X-ray afterglow confirmation
  91. GRB 110428A: Suzaku WAM observation of the prompt emission
  92. Fermi-GBM data processing and delivery
  93. GRB 110422A: optical observations in CrAO
  94. GRB 110422A: Update of Herschel FIR observation schedule
  95. GRB 110428A : Swift-XRT observations
  96. Konus-Wind observation of GRB 110428A
  97. GRB 110428A: Fermi-LAT Detection
  98. GRB 110426A: MASTER synchronous with MAXI/GSC observations
  99. GRB 110426A: MAXI/GSC detection of a GRB
  100. GRB 110422A: optical observations in CrAO, second epoch

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
Questions or comments?
Contact GCN directly.
Have you found a bug in GCN?
Open an issue.
Want to contribute code to GCN?
Get involved on GitHub.

gcn.nasa.gov

A service of the Astrophysics Science Division at NASA Goddard Space Flight Center

Looking for U.S. government information and services? Visit USA.gov