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"

24511 results found.

  1. GRB 130420A: PAIRITEL NIR detections
  2. GRB 130420A: ROTSE-III Detection of Optical Counterpart
  3. GRB 130420A: Swift detection of a burst with an optical counterpart
  4. GRB 130420A: Faulkes Telescope North candidate
  5. GRB 130418A: SMARTS optical/IR afterglow observations
  6. GRB 130418A: Submm observations from SMA
  7. GRB 130419A, Swift-BAT refined analysis
  8. GRB 130327B: Swift/XRT source is not the afterglow
  9. GRB 130419B (Swift trigger Trigger 553930): MASTER-Net optical observations
  10. Trigger 553930: Swift detection of a possible flare from HR 5110
  11. GRB 130418A: T21 optical observation
  12. GRB 130418A: T18 and T21 optical observations
  13. GRB 130418A, Swift-BAT refined analysis
  14. GRB 130419A: Swift detection of a burst
  15. GRB 130418A: CARMA 3mm detection
  16. GRB130418A: OSN 1.5m fading afterglow detection
  17. GRB 130418A: Swift/UVOT Detection and request for continuing coverage
  18. GRB 130418A: Swift detection of a burst with an optical counterpart
  19. GRB 130408A: Suzaku WAM observation of the prompt emission
  20. GRB 130408A: SMARTS optical/IR afterglow observations
  21. GRB 130408A, Swift-BAT refined analysis
  22. GRB 130408A: Zadko observatory - Gingin optical observations
  23. Konus-Wind observation of GRB 130408A
  24. GRB 130408A: GROND detection of the afterglow
  25. GRB 130408A: Liverpool Telescope Optical candidate detection
  26. GRB 130408A: Swift detection of a burst
  27. GRB 130211A: Retraction of afterglow candidate
  28. GRB 130327B: Suzaku WAM observation of the prompt emission
  29. Konus-Wind observation of GRB 130320B
  30. IPN Triangulation of GRB 130320B (very long/bright)
  31. Swift/XRT observation of GRB 130327B
  32. Konus-Wind observation of GRB 130327B
  33. GRB 130327B: Fermi-LAT detection of a burst
  34. GRB 130327B: Fermi GBM detection
  35. GRB 130327A: Swift-BAT refined analysis
  36. GRB 130327A: Weihai optical obsevations
  37. Konus-Wind observation of GRB 130325A
  38. GRB 130327A: PAIRITEL NIR Afterglow Candidate
  39. GRB 130325A: Fermi LAT detection
  40. GRB 130327A: Swift detection of a burst
  41. GRB 130325A: Fermi GBM detection
  42. Konus-Wind observation of GRB 130320A
  43. IPN Triangulation of GRB 130320A (long/very bright)
  44. GRB 130305A: Gemini follow-up observations
  45. GRB 130315A: GROND afterglow candidate
  46. GRB 130315A, Swift-BAT refined analysis
  47. GRB 130315A: Swift detection of a burst
  48. GRB 130310A : Suzaku WAM observation of the prompt emission
  49. GRB 130305A: TLS Tautenburg observations
  50. GRB 130313A: TNG optical observations
  51. GRB 130215A: Detection of the SN with the 10.4m GTC
  52. GRB 130313A: Swift-XRT refined Analysis
  53. GRB 130313A: Swift-XRT detection of a possible X-ray afterglow
  54. GRB 130313A: Swift-BAT refined analysis
  55. GRB 130313A: MASTER-Net optical observations
  56. GRB 100424A: Keck host detection and VLT/X-shooter redshift
  57. GRB 130310A: optical observations
  58. GRB 130306A: Swift Detection of a Possible Afterglow
  59. GRB 130131B: host detection and redshift
  60. Konus-Wind observation of GRB 130310A
  61. GRB 130310A: Fermi GBM detection
  62. GRB 130310A: Fermi-LAT detection and localization
  63. GRB 130306A: MITSuME Ishigakijima upper limits
  64. GRB 130306A: Swift-BAT refined analysis
  65. Konus-Wind observation of GRB 130306A
  66. GRB 111123A: Keck-I host detection and VLT/X-shooter redshift
  67. GRB 130305A: Gemini-North upper limit
  68. GRB 130307A: Fermi GBM detection
  69. GRB 130306A: MASTER-Net pre-Swift alert observation
  70. GRB 130306A: Swift detection of a burst
  71. GRB 130305A: P60 Observations
  72. GRB 100615A: HST host detection and X-shooter redshift
  73. Konus-Wind observation of GRB 130305A
  74. GRB 130305A: Fermi GBM observation
  75. GRB 130305A: Fermi LAT Detection
  76. GBM trigger 383712005 (GRB 130228A?) : Possible high-energy photon emission in Fermi/LAT data
  77. GRB 130219A: Suzaku WAM observation of the prompt emission
  78. SGR 1806-20 outburst (trigger 549841), Swift-BAT refined analysis
  79. Konus-Wind observation of GRB 130219A
  80. GRB 130216B: Suzaku WAM observation of the prompt emission
  81. GRB 130215A: Suzaku WAM observation of the prompt emission
  82. GRB 130219A: Fermi GBM detection
  83. GRB 130216A: Further Swift-BAT refined analysis
  84. GRB 130216B: MASTER-Net early observation
  85. GRB 130216A: MASTER-Net early observations
  86. GRB 130216A: Fermi GBM observation
  87. GRB 130216B: Fermi GBM observation
  88. GRB 130216A: MITSuME Ishigakijima upper limits
  89. GRB 130216B BAT refined analysis
  90. GRB 130216A: Swift-BAT refined analysis
  91. GRB 130216B: Burst found in ground analysis of BAT data
  92. GRB 120118B: host observations and redshift determination
  93. GRB 130216A: Swift detection of a burst
  94. GRB 130215A: MITSuME Okayama Optical Observation
  95. GRB 130215A: Fermi GBM detection
  96. GRB 130215A: RAPTOR Measurements
  97. GRB 130215A: Xinglong optical observations
  98. GRB 130215A: Swift-BAT refined analysis
  99. GRB 130215A: CARMA 3mm detection
  100. GRB 130215A: P60 Observations

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