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"

28118 results found.

  1. GRB 130722A: Enhanced Swift-XRT position
  2. GRB 130722A: Swift-XRT refined Analysis
  3. GRB 130722A: Skynet/GORT observations
  4. GRB 130719A, Swift-BAT refined analysis
  5. GRB 130715A: Suzaku WAM observation of the prompt emission
  6. GRB 130722A: Swift detection of a burst
  7. GRB 130719A: Swift detection of a burst
  8. GRB 130716A: Gemini-North imaging
  9. GRB 130716A: UVOT Upper Limits
  10. GRB 130716A: Probable short-hard burst with delayed Swift data
  11. GRB 130715A: Fermi GBM detection
  12. GRB 130626A: Retraction of possible X-ray afterglow
  13. GRB 130708A: Swift XRT and UVOT Observations
  14. GRB 130708A: Fermi GBM observation
  15. GRB 130708A found in ground analysis of Swift-BAT data
  16. GRB 130628A: Suzaku WAM observation of the prompt emission
  17. GRB130702A: NOT observation - the detection of an emerging supernova
  18. GRB 130702A: Continued RATIR Optical and NIR Observations
  19. GRB 130702A: Continued UVOT Observations
  20. GRB 130702Ð
  21. Konus-Wind observation of GRB 130702A
  22. GRB 130702A: NOT spectroscopy and redshift of the nearby bright galaxy
  23. GRB 130702A: RATIR Optical and NIR Observations
  24. GRB 130702A: NOT optical observations
  25. GRB 130702A / Fermi394416326 : Nanshan optical observations
  26. Fermi GRB 130702A: Swift XRT and UVOT observations
  27. GRB 130702A / Fermi394416326: Fermi GBM detection
  28. GRB 130702A / Fermi394416326 : Fermi-LAT detection of a burst
  29. Fermi GBM trigger 394416326: MASTER early optical limit
  30. GRB 130628A: Fermi GBM detection
  31. Fermi394416326: FTN detection
  32. Fermi394416326: iPTF detection of a possible optical afterglow
  33. GRB 130623A: Second Swift-XRT observation
  34. GRB 130701A: MITSuME Akeno Optical observation
  35. GRB 130701B: Fermi GBM detection
  36. GRB 130701A: Swift-XRT refined Analysis
  37. GRB 130701A: P60 Observations
  38. GRB 130701A, Swift-BAT refined analysis
  39. GRB 130701A: Swift/UVOT Detection
  40. GRB 130701A: Enhanced Swift-XRT position
  41. GRB 130701A: optical afterglow from the NOT
  42. GRB 130701A: Swift detection of a burst
  43. GRB 130627B, Swift-BAT refined analysis
  44. GRB 130627A, Swift-BAT refined analysis
  45. GRB 130627B: Swift/UVOT Upper Limits
  46. GRB 130627A: Swift/UVOT Upper Limits
  47. GRB 130627A: Swift-XRT refined Analysis
  48. Swift trigger 559221 is likely a false trigger coincident with IGR J17544-2619
  49. GRB 130627A: Enhanced Swift-XRT position
  50. GRB 130626A: RATIR Optical Observations
  51. GRB 130626A, Swift-BAT refined analysis
  52. GRB 130627B: Swift-XRT observations
  53. GRB 130626A: Swift-XRT possible detection and UVOT upper limits
  54. GRB 130627A: Swift-XRT observations
  55. GRB 130626A: Swift detection of a short burst
  56. GRB 130625A: Swift-XRT refined Analysis
  57. GRB 130625A: Swift/UVOT Upper Limits
  58. GRB 130625A: Nanshan optical upper limit
  59. GRB 130623A: Swift-XRT and UVOT observations
  60. GRB 130625A: Swift-BAT refined analysis
  61. GRB 130625A: Enhanced Swift-XRT position
  62. GRB 130625A: Swift detection of a burst
  63. GRB 130623A detected in ground analysis of Swift-BAT data
  64. GRB 130614A: Suzaku WAM observation of the prompt emission
  65. Swift Trigger 558631 is not a real source
  66. GRB 130612A: Swift-BAT refined analysis
  67. GRB 130609B: Suzaku WAM observation of the prompt emission
  68. GRB 130612A: Continued Skynet/PROMPT/GORT/DSO observations
  69. Trigger 558399: Swift detection of the Soft Gamma Repeater AXP 1E1547.0-5408
  70. GRB 130615A: Continued Skynet/PROMPT Observations
  71. GRB 130610A: TAROT La Silla observatory optical observations
  72. GRB 130610A: CrAO optical observations
  73. GRB 130615A: Zadko observatory - Gingin optical observations
  74. GRB 130615A: TAROT La Silla observatory optical observations
  75. GRB 130615A: Swift-XRT refined Analysis
  76. GRB 130614A: Fermi GBM detection
  77. GRB 130615A: Swift/UVOT Upper Limits
  78. GRB 130615A: Skynet/PROMPT Observations
  79. GRB 130615A: Enhanced Swift-XRT position
  80. GRB 130615A: Swift-BAT refined analysis
  81. GRB 130615A: GROND afterglow candidate
  82. GRB 130615A: Swift detection of a burst
  83. GRB 130612A: Fermi GBM observation
  84. GRB 130603B: Detection of possible afterglow/kilonova in HST observations
  85. GRB 130606B: Suzaku WAM observation of the prompt emission
  86. GRB 130612A: ISON-NM optical observations
  87. GRB 130612A: MITSuME Okayama upper limits
  88. GRB 130612A: Swift/UVOT Detection
  89. GRB 130612A: Swift-XRT refined Analysis
  90. GRB 130612A: Zadko observatory - Gingin optical observations
  91. GRB 130612A: Enhanced Swift-XRT position
  92. GRB 130612A: TAROT La Silla observatory optical observations
  93. GRB130612A OSN I-band observations
  94. GRB 130612A: RATIR Optical Observations
  95. GRB 130612A: P60 Observations
  96. GRB 130612A: Skynet/PROMPT detection of the optical afterglow
  97. GRB 130612A: PAIRITEL NIR Afterglow Observations
  98. GRB 130612A: Swift detection of a burst with an optical counterpart
  99. Recent Fermi GBM particle triggers misclassified as GRBs
  100. GRB 130609A: Swift/UVOT Upper Limits

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