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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"

45796 results found.

  1. Konus-Wind observation of GRB 130320B
  2. Swift detection of IGR J18245-2452
  3. IPN Triangulation of GRB 130320B (very long/bright)
  4. Swift/XRT observation of GRB 130327B
  5. GRB 130327A: RATIR Optical/NIR afterglow confirmation
  6. GRB 130306A: Confirmation of the X-ray Afterglow
  7. GRB 130310A: RATIR Observations
  8. Swift Trigger 552142 is a noise event
  9. Konus-Wind observation of GRB 130327B
  10. GRB 130327B: Fermi-LAT detection of a burst
  11. GRB 130327B: Fermi GBM detection
  12. Swift Trigger 552142: a possible GRB
  13. GRB 130327B: gamma-ray detection by AGILE
  14. GRB 130327A: Swift-BAT refined analysis
  15. GRB 130327A: Gemini Observations
  16. GRB 130327A: Swift-XRT refined Analysis
  17. GRB 130327A: Weihai optical obsevations
  18. GRB 130327A: Swift/UVOT Upper Limits
  19. Konus-Wind observation of GRB 130325A
  20. GRB 130327A: ISON-NM optical upper limit
  21. GRB 130325A Tiled Swift observations
  22. GRB 130327A: Enhanced Swift-XRT position
  23. GRB 130327A: RATIR Optical and NIR Observations
  24. GRB 130327A: PAIRITEL NIR Afterglow Candidate
  25. GRB 130325A: Fermi LAT detection
  26. GRB 130327A: Swift detection of a burst
  27. report: GRB 130315A: Zadko observatory - Gingin optical observations
  28. GRB 130325A: Fermi GBM detection
  29. Konus-Wind observation of GRB 130320A
  30. IPN Triangulation of GRB 130320A (long/very bright)
  31. GRB 130305A: Gemini follow-up observations
  32. GRB 130315A: GROND afterglow candidate
  33. GRB 130305A: optical upper limit in Mondy observatory
  34. GRB 130315A: Swift/UVOT Upper Limits
  35. GRB 130313A: optical upper limit in CrAO
  36. GRB 130313A: optical upper limit in Mondy observatory
  37. GRB 130315A: SALT optical observations
  38. GRB130313A: GTC early optical limits
  39. GRB 130313A: 5.8 GHz VLA upper limit
  40. GRB 130315A: Swift-XRT refined Analysis
  41. Swift XRT observations of GRB 130310A
  42. GRB 130315A, Swift-BAT refined analysis
  43. GRB 130313A: Swift/UVOT Upper Limits
  44. GRB 130305A: PTF P48 optical upper limits
  45. GRB130315A BOOTES-3 optical limit
  46. GRB 130315A: Swift detection of a burst
  47. GRB 130310A : Suzaku WAM observation of the prompt emission
  48. GRB 130305A: TLS Tautenburg observations
  49. GRB 130313A: RATIR Optical and NIR Observations
  50. GRB 130313A: TNG optical observations
  51. GRB 130313A: Fading X-ray Afterglow
  52. Swift-BAT trigger 551030 is not astrophysical
  53. GRB 130215A: Detection of the SN with the 10.4m GTC
  54. GRB130313A: Optical observations from GTC
  55. GRB 130313A: NOT optical upper limit
  56. GRB 130313A: Swift-XRT refined Analysis
  57. GRB 130313A: simultaneous and follow-up optical observations at BOOTES-3 and BOOTES-4
  58. GRB 130313A: Weihai optical upper limit
  59. GRB 130313A: Swift-XRT detection of a possible X-ray afterglow
  60. GRB 130313A: Swift-BAT refined analysis
  61. GRB 130313A: Zadko observatory - Gingin optical observations
  62. GRB 130313A: MASTER-Net optical observations
  63. GRB 130313A: Swift detection of a short burst
  64. IPN Triangulation of GRB 130307A
  65. GRB 100424A: Keck host detection and VLT/X-shooter redshift
  66. Swift XRT RETRACTION of GRB 130310A afterglow detection
  67. GRB 130310A: optical observations
  68. Swift XRT observations of GRB 130310A
  69. GRB 130306A: Swift Detection of a Possible Afterglow
  70. GRB 130131B: host detection and redshift
  71. Konus-Wind observation of GRB 130310A
  72. IPN triangulation of GRB 130310A
  73. GRB 130310A: Fermi GBM detection
  74. GRB 130310A: Fermi-LAT detection and localization
  75. GRB 130131A: JCMT SCUBA-2 sub-mm observations
  76. GRB 130306A: MITSuME Ishigakijima upper limits
  77. GRB 130306A: Swift-BAT refined analysis
  78. IPN triangulation of GRB 130228A
  79. GRB 130305A BAT refined circular
  80. GRB 130305A: Further Swift-XRT Observations
  81. Konus-Wind observation of GRB 130306A
  82. GRB 130305A: Optical Observations
  83. GRB 111123A: Keck-I host detection and VLT/X-shooter redshift
  84. GRB 130305A: Gemini-North upper limit
  85. GRB 130307A: Fermi GBM detection
  86. GRB 130306A: Fermi GBM observation
  87. GRB 130306A: MASTER-Net pre-Swift alert observation
  88. GRB 130305A: Swift/UVOT Upper Limit
  89. GRB 130305A: RATIR Observations
  90. GRB 130306A: Swift detection of a burst
  91. GRB 130305A: P60 Observations
  92. GRB 100615A: HST host detection and X-shooter redshift
  93. GRB 130305A: Swift/XRT detection of the afterglow
  94. Konus-Wind observation of GRB 130305A
  95. GRB 130305A: Fermi GBM observation
  96. GRB 130305A: Fermi LAT Detection
  97. Fermi GBM trigger 130301.638 is not GRB
  98. GBM trigger 383712005 (GRB 130228A?) : Possible high-energy photon emission in Fermi/LAT data
  99. GRB 130305A found in ground analysis of Swift/BAT data
  100. GRB 121128A: optical observations in Mondy observatory

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