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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"

11836 results found.

  1. GRB 110312A: RTT150 optical observations
  2. GRB 110312A: Swift-XRT refined Analysis
  3. GRB 110312A: Swift detection of a burst
  4. GRB 110223A : early optical limit by "Pi of the Sky"
  5. GRB 110223A: Liverpool Telescope observations
  6. GRB 110223A: Swift-XRT refined Analysis
  7. GRB 110223B: Swift-BAT refined analysis
  8. GRB 110223A: Swift detection of a burst
  9. OT 110215: Further NIR observations from NOT of the GRB candidate
  10. Swift XRT and UVOT Observations of OT 110215
  11. OT 110215: NIR observations from NOT of GRB candidate
  12. GRB 110213A: optical observations in CrAO
  13. OT 110215: possible GRB from 2MASS J00264184+8324093
  14. GRB 110213B: Gemini South Redshift
  15. GRB 110213A: YNAO-GMG Observations
  16. Konus-Wind observation of GRB 110213A
  17. Konus-Wind observation of GRB 110213B
  18. GRB 110213B: MAXI/GSC refined analysis
  19. GRB 110213B: MAXI/GSC detection of a probable GRB
  20. GRB 110213A: GRAS011 optical observations
  21. GRB 110212A: GRT Optical Observation
  22. GRB 110212A: SARA-N Optical Limits
  23. GRB 110201A: Subaru/MOIRCS Ks-band photometry
  24. GRB 110210A: Swift-XRT refined Analysis
  25. GRB 110210A: Swift detection of a burst
  26. GRB 110208A: Potential afterglow from Magellan
  27. GRB 110208A: Swift-XRT refined Analysis
  28. GRB 110208A: Swift-BAT refined analysis
  29. GRB 110208A: Swift detection of a burst
  30. GRB 110205A: optical observations in Mondy observatory
  31. GRB 110205A : HCT optical observations
  32. GRB 110207A: Swift-BAT refined analysis
  33. Konus-Wind observation of GRB 110205A
  34. GRB 110207A: Swift detection of a burst
  35. GRB 110206A: Swift detection of a probable X-ray afterglow
  36. GRB 110206A: a long GRB detected by INTEGRAL
  37. GRB110205A: MITSuME Ishigakijima Optical Observation
  38. GRB 110205A: Swift-XRT refined Analysis
  39. GRB 110201A: Swift-XRT refined Analysis
  40. GRB 110201A: Swift detection of a burst
  41. GRB 110120A: Suzaku WAM observation of the prompt emission
  42. GRB 110128A: Swift detection of a burst
  43. Konus-Wind observation of GRB 110120A
  44. GRB 110120A: MASTER optical observations
  45. GRB 110120A: Fermi LAT detection
  46. GRB 110120A: Fermi GBM detection
  47. GRB 110119A: Suzaku WAM observation of the prompt emission
  48. GRB 110120A: MASTER optical observations
  49. GRB 110119A: Swift-XRT refined Analysis
  50. GRB110119A: MITSuME Okayama optical upper limits
  51. GRB 110119A: PAIRITEL NIR Afterglow Detection
  52. GRB 110119A: Swift detection of a burst with an optical detection
  53. The Christmas burst GRB 101225A - optical spectroscopy with GTC
  54. GRB 110112B: A short GRB detected by INTEGRAL
  55. GRB 110112A: Swift-XRT refined Analysis
  56. GRB 110112A: Swift detection of a possible short burst
  57. Short GRB 110106A: MASTER OT observations
  58. GRB 110106B: Swift-XRT refined Analysis
  59. GRB110106B: Xinglong TNT upper limit
  60. GRB 110106B: Swift detection of a burst
  61. GRB 110106A: TNG optical observations and candidate counterparts
  62. GRB 110106A: MASTER optical observations
  63. GRB 101225A: Host galaxy
  64. GRB 110102A: Swift-XRT refined Analysis
  65. Konus-Wind observation of GRB 110102A
  66. GRB110102A: MITSuME Okayama Optical Observation
  67. GRB 101225A: MAXI/GSC observations
  68. Tentative redshift of GRB101225A (Christmas's burst) from Swift-XRT data
  69. GRB 101225A: Swift-XRT refined Analysis
  70. Trigger 441015 / GRB 101225A: NOT optical afterglow candidate
  71. GRB 101224A: NOT optical observation
  72. GRB 101224A: Swift-XRT refined Analysis
  73. GRB 101219B: Swift-XRT refined Analysis
  74. GRB 101219B: GROND Detection of the Optical/NIR Afterglow
  75. GRB 101219B: Swift-BAT refined analysis
  76. GRB 101219A: Swift-XRT refined Analysis
  77. Konus-Wind observation of short hard GRB 101219A
  78. GRB 101219A: Magellan NIR observations
  79. GRB 101219A: ROTSE-III Optical Limits
  80. GRB 101219A: Swift detection of a short hard burst
  81. Redshift solution(s) for GRB101213A from Swift-XRT data
  82. Konus-Wind observation of GRB 101213A
  83. GRB 101213A: Swift-XRT refined Analysis
  84. GRB 101204A: Swift-XRT refined Analysis
  85. GRB 101204A Afterglow Candidate, VATT Observations
  86. GRB 101204A Swift-XRT/UVOT afterglow candidate
  87. Konus-Wind observation of GRB 101130A
  88. Konus-Wind observation of GRB 101129A
  89. GRB 101201A: Swift-XRT refined Analysis
  90. Swift detection of MAXIJ1409-619
  91. GRB 101123A: MASTER prompt optical observations
  92. Konus-Wind observation of GRB 101123A
  93. GRB 101117B: Swift/UVOT Observations of the Optical Afterglow
  94. XRF 101117A: Palomar Transient Factory Observations
  95. XRF101117A: MAXI/GSC detection of a short X-ray transient
  96. GRB 101114A: GROND Upper limits
  97. Konus-Wind observation of GRB 101114A
  98. Fermi GBM detection of a burst from a galactic source
  99. Konus-Wind observation of GRB 101112A
  100. GRB 101112A: a long GRB detected by INTEGRAL

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