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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"

23707 results found.

  1. GRB 110112A: MASTER optical observations
  2. GRB 110112A: Swift-BAT refined analysis
  3. GRB 110106B: MASTER optical observations
  4. GRB110112A: TNT optical afterglow candidate
  5. GRB 110112A: Swift detection of a possible short burst
  6. GRB 110106B: early optical and near-IR observations
  7. GRB 110106B: MASTER early optical observations
  8. GRB 110107A: Swift-BAT refined analysis
  9. Short GRB 110106A: MASTER OT observations
  10. GRB 110106A: TNG NIR observations
  11. GRB 110106B: Liverpool Telescope observations
  12. GRB 110106A: MITSuME Okayama optical upper limits
  13. GRB 110106B: Swift-BAT refined analysis
  14. GRB 110106A: TNG redshift of the closeby galaxy
  15. GRB 110106A: Swift-BAT refined analysis
  16. GRB 110106A: Enhanced Swift-XRT position
  17. GRB 110106B: Swift detection of a burst
  18. GRB 110106A: TNG optical observations and candidate counterparts
  19. GRB 110106A: MASTER optical observations
  20. GRB 110106A: Swift detection of a burst
  21. Konus-Wind observation of GRB 110102A
  22. GRB110102A: Swift/UVOT observations
  23. GRB110102A: MITSuME Okayama Optical Observation
  24. GRB 110102A: Swift-BAT refined analysis
  25. GRB 110102A: Swift detection of a burst with an optical detection
  26. GRB 101225A: optical break from NOT observation
  27. GRB 101225A: MMT spectroscopy
  28. GRB 101225A: MAXI/GSC observations
  29. GRB 101225A Late-time emission observed by Swift-BAT
  30. GRB 101225A, Swift-BAT refined analysis
  31. GRB 101225A: Swift/UVOT Detection
  32. Trigger 441015 / GRB 101225A: Further NOT optical observation
  33. GRB 101225A (Swift trigger 441015): optical upper limit
  34. Trigger 441015: Swift detection of a possible burst or transient
  35. GRB101224A: MITSuME Okayama optical upper limits
  36. GRB 101224A, Swift-BAT refined analysis
  37. GRB 101224A: Swift detection of a short burst
  38. GRB 101219A: MITSuME Ishigakijima Optical upper limits
  39. GRB 101219B: GROND Detection of the Optical/NIR Afterglow
  40. GRB 101219B: Fermi GBM observation
  41. GRB 101219A: IAC80 optical observations
  42. GRB 101219B: Swift-BAT refined analysis
  43. GRB 101219B: Swift detection of a burst with an optical afterglow
  44. GRB 101219A: GROND Upper limits
  45. Konus-Wind observation of short hard GRB 101219A
  46. GRB 101219A: Magellan NIR observations
  47. GRB 101219A: Further Gemini-South Imaging
  48. GRB 101219A: Swift-BAT refined analysis
  49. GRB 101219A: ROTSE-III Optical Limits
  50. GRB 101219A: Swift detection of a short hard burst
  51. GRB 101213A : Suzaku WAM observation of the prompt emission
  52. Konus-Wind observation of GRB 101213A
  53. XRF 101117A, RIMOTS optical upper limits
  54. GRB 101213A, Swift-BAT refined analysis
  55. GRB 101213A: Swift detection of a burst
  56. GRB101204A GROND Detection of the Optical/NIR Afterglow
  57. GRB 101129A : Suzaku WAM observation of the prompt emission
  58. Konus-Wind observation of GRB 101130A
  59. GRB 101204A detected in ground analysis of BAT data
  60. Konus-Wind observation of GRB 101129A
  61. IPN Localization of GRB101130 (possible short duration burst)
  62. GRB 101129A SHB found by IPN and in ground analysis of BAT data
  63. GRB101030A
  64. GRB 101201A: Swift-XRT refined Analysis
  65. GRB 101201A: Swift/UVOT Detection
  66. GRB 101201A: GROND Detection of the Optical/NIR Afterglow
  67. GRB 101201A detected in ground analysis of BAT data
  68. Swift detection of MAXIJ1409-619
  69. GRB 101123A: MASTER prompt optical observations
  70. Konus-Wind observation of GRB 101123A
  71. IPN triangulation of bright GRB 101123A
  72. GRB 101123A: Fermi GBM detection
  73. GRB 101117B: GROND Upper limits
  74. GRB 101112A: OSN and BTA observations
  75. XRF 101117A: Palomar Transient Factory Observations
  76. GRB 101117B: Swift-BAT refined analysis
  77. GRB 101117B: Swift detection of a burst
  78. XRF101117A: MAXI/GSC detection of a short X-ray transient
  79. GRB 101114A: GROND Upper limits
  80. Konus-Wind observation of GRB 101114A
  81. GRB 101114A, Swift-BAT GRB detected by ground processing
  82. GRB 101112A: Fermi GBM detection
  83. GRB 101112A: optical observations
  84. GRB 10112A: MASTER optical observations
  85. Konus-Wind observation of GRB 101112A
  86. GRB 101112A: BOOTES-2/TELMA optical afterglow candidate
  87. GRB101112A: Liverpool Telescope Afterglow Candidate
  88. GRB 101112A: a long GRB detected by INTEGRAL
  89. GRB 100906A: optical observations
  90. GRB 101030A: Swift-BAT refined analysis
  91. GRB 101030A: Swift detection of a burst
  92. GRB 090111, the review of the sky area in plate archives (1976-1996)
  93. Konus-Wind observation of GRB 101023A
  94. GRB 101024A: GROND optical/NIR observations
  95. GRB 101024A: Zadko observatory - Gingin. Optical observations refined analysis
  96. GRB 101024A: Swift XRT refined analysis
  97. GRB 101024A: Zadko observatory - Gingin. Optical observations
  98. GRB101024A: Swift/UVOT
  99. GRB 101024A: Swift-BAT refined analysis
  100. Swift/UVOT observations of GRB101023A

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