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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"

37342 results found.

  1. GRB 130305A: TLS Tautenburg observations
  2. GRB 130313A: RATIR Optical and NIR Observations
  3. GRB 130313A: TNG optical observations
  4. GRB 130313A: Swift-BAT Spectral lag analysis
  5. GRB 130313A: Fading X-ray Afterglow
  6. GRB 130215A: Detection of the SN with the 10.4m GTC
  7. GRB130313A: Optical observations from GTC
  8. GRB 130313A: NOT optical upper limit
  9. GRB 130313A: Swift-XRT refined Analysis
  10. GRB 130313A: simultaneous and follow-up optical observations at BOOTES-3 and BOOTES-4
  11. GRB 130313A: Weihai optical upper limit
  12. GRB 130313A: Swift-XRT detection of a possible X-ray afterglow
  13. GRB 130313A: Swift-BAT refined analysis
  14. GRB 130313A: Zadko observatory - Gingin optical observations
  15. GRB 130313A: MASTER-Net optical observations
  16. GRB 130313A: Swift detection of a short burst
  17. IPN Triangulation of GRB 130307A
  18. GRB 100424A: Keck host detection and VLT/X-shooter redshift
  19. Swift XRT RETRACTION of GRB 130310A afterglow detection
  20. GRB 130310A: optical observations
  21. Swift XRT observations of GRB 130310A
  22. GRB 130306A: Swift Detection of a Possible Afterglow
  23. GRB 130131B: host detection and redshift
  24. Konus-Wind observation of GRB 130310A
  25. IPN triangulation of GRB 130310A
  26. GRB 130310A: Fermi GBM detection
  27. GRB 130310A: Fermi-LAT detection and localization
  28. GRB 130131A: JCMT SCUBA-2 sub-mm observations
  29. GRB 130306A: MITSuME Ishigakijima upper limits
  30. GRB 130306A: Swift-BAT refined analysis
  31. IPN triangulation of GRB 130228A
  32. GRB 130305A BAT refined circular
  33. GRB 130305A: Further Swift-XRT Observations
  34. Konus-Wind observation of GRB 130306A
  35. GRB 130305A: Optical Observations
  36. GRB 111123A: Keck-I host detection and VLT/X-shooter redshift
  37. GRB 130305A: Gemini-North upper limit
  38. GRB 130307A: Fermi GBM detection
  39. GRB 130306A: Fermi GBM observation
  40. GRB 130306A: MASTER-Net pre-Swift alert observation
  41. GRB 130305A: Swift/UVOT Upper Limit
  42. GRB 130305A: RATIR Observations
  43. GRB 130306A: Swift detection of a burst
  44. GRB 130305A: P60 Observations
  45. GRB 100615A: HST host detection and X-shooter redshift
  46. GRB 130305A: Swift/XRT detection of the afterglow
  47. Konus-Wind observation of GRB 130305A
  48. GRB 130305A: Fermi GBM observation
  49. GRB 130305A: Fermi LAT Detection
  50. Fermi GBM trigger 130301.638 is not GRB
  51. GBM trigger 383712005 (GRB 130228A?) : Possible high-energy photon emission in Fermi/LAT data
  52. GRB 130305A found in ground analysis of Swift/BAT data
  53. GRB 121128A: optical observations in Mondy observatory
  54. GRB 121128A: optical upper limit in Maidanak observatory
  55. GRB 130216A: Swift/UVOT Upper Limit
  56. GRB 130219A: Suzaku WAM observation of the prompt emission
  57. Konus-Wind observation of GRB 130219A
  58. GRB 130216B: Suzaku WAM observation of the prompt emission
  59. GRB 130216A: possible radio counterpart is steady field source
  60. GRB 130216A: Swift/XRT observations
  61. IPN Triangulation of GRB 130219A
  62. GRB 130215A: Suzaku WAM observation of the prompt emission
  63. GRB 130215A: PTF P48 optical detection
  64. GRB 130219A: Fermi GBM detection
  65. GRB 130216B: Swift/XRT observations
  66. GRB 130216A: Further Swift-BAT refined analysis
  67. GRB 130216B: MASTER-Net early observation
  68. GRB 130216A: MASTER-Net early observations
  69. GRB 130215A: Continued RATIR Optical and NIR Monitoring
  70. GRB 130216A: Fermi GBM observation
  71. GRB 130216B: Fermi GBM observation
  72. GRB 130216A: possible early detection at 15 GHz
  73. GRB 130216A: MITSuME Ishigakijima upper limits
  74. GRB 130216B BAT refined analysis
  75. GRB 130216B: P200 NIR Observations
  76. GRB 130216A: P200 NIR Observations
  77. GRB 130216A: Swift-BAT refined analysis
  78. GRB 130216A: TAROT La Silla observatory optical observations
  79. GRB 130215A: Additional P200 NIR observations
  80. GRB 130216B: Burst found in ground analysis of BAT data
  81. GRB 120118B: host observations and redshift determination
  82. GRB 130216A: OSN I-band observations
  83. GRB 130216A: Swift detection of a burst
  84. GRB 130215A: P200 NIR observations
  85. GRB 130215A: GROND Detection of the Optical/NIR Afterglow
  86. GRB 130215A: MITSuME Okayama Optical Observation
  87. GRB 130215A: Fermi GBM detection
  88. GRB 130215A: RAPTOR Measurements
  89. GRB 130215A: GMG optical observation
  90. GRB 130215A: iTelescope T11 observations
  91. GRB 130215A: Xinglong optical observations
  92. GRB 130215A: Swift-BAT refined analysis
  93. GRB 130215A: TAROT La Silla observatory optical observations
  94. GRB 130215A: RATIR Optical and NIR Observations
  95. GRB 130215A: REM NIR observations
  96. GRB 130215A: CARMA 3mm detection
  97. GRB 130215A: P60 Observations
  98. GRB 130215A: ROTSE-III data analysis
  99. GRB 130215A: Redshift estimate
  100. GRB 130215: ROTSE-III Detection of Optical Counterpart

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