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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"

36162 results found.

  1. GRB 120118B: optical upper limit
  2. GRB 120116A: optical upper limit
  3. GRB 120119A : LOAO Optical Observations
  4. GRB 120119A : SMA submm follow-up observation
  5. Fermi GBM trigger 120123.169 is not a GRB
  6. GRB 120119A: EVLA observations
  7. GRB 120119A: GRT detection of early afterglow
  8. GRB 111225A: optical observations
  9. GRB 120119A: optical upper limit
  10. GRB 120121A: Swift/UVOT Upper Limits
  11. GRB 120121A: Swift-XRT refined Analysis
  12. GRB 120121A: Swift-BAT refined analysis
  13. GRB 120121A: Enhanced Swift-XRT position
  14. GRB 120121A: ISON-NM optical observations
  15. GRB 120121A: Swift-XRT position
  16. GRB 120121A: Swift detection of a burst
  17. GRB 120119A, Swift-BAT refined analysis
  18. GRB 120119A: TAROT La Silla observatory optical observations
  19. GRB120119A: REM NIR observations
  20. GRB 120119A: optical observations
  21. GRB 120119A: Swift/UVOT Observations
  22. GRB 120118B: RTT150 optical observations
  23. GRB 120119A: SMARTS optical/IR afterglow observations
  24. GRB 120119A: Swift-XRT refined Analysis
  25. GRB 120119A: Enhanced Swift-XRT position
  26. GRB 120102A, the review of the sky area in plate archive
  27. GRB 120119A: Fermi GBM observation
  28. GRB 120118B, Swift-BAT refined analysis
  29. Konus-Wind observation of GRB 120119A
  30. GRB 120119A: optical observations
  31. GRB 120118B: TNG NIR observations
  32. GRB 120118B: Swift-XRT refined Analysis
  33. GRB 120118B : Lulin Optical limit
  34. GRB 120119A: MMT redshift confirmation
  35. GRB 120119A: Lick 3m Spectroscopy
  36. GRB 120119A: Gemini-S redshift
  37. GRB 120119A: PROMPT optical observation of early afterglow
  38. GRB 120119A: GROND Detection of the Optical/NIR Afterglow
  39. GRB 120118B: Swift/UVOT Upper Limits
  40. GRB 120119A: Liverpool Telescope afterglow detection
  41. GRB 120119A: PAIRITEL NIR Detection
  42. GRB 120119A: Swift detection of a burst with an optical counterpart
  43. GRB 120118B: NOT observations
  44. GRB 120118B: Enhanced Swift-XRT position
  45. GRB 120118B: Faulkes Telescope South observations
  46. GRB 120118B: Swift-XRT position
  47. GRB 120118B: MASTER optical observations
  48. GRB 120118B: Swift detection of a burst
  49. XRF 120118A: an X-Ray Flash detected by INTEGRAL
  50. GRB 120116A: Swift/UVOT Upper Limits
  51. GRB 120116A: Swift-XRT refined Analysis
  52. GRB 120116A: Enhanced Swift-XRT position
  53. AXP 4U 1042+61: Mondy optical observations
  54. GRB 120116A: Mondy optical observations
  55. GRB 120116A: Gemini optical/IR candidate
  56. GRB 120116A: EVLA observations
  57. GRB 120116A: WHT optical observations
  58. GRB 120116A: Optical observations at Crni Vrh
  59. GRB 120116A: Swift-BAT refined analysis
  60. GRB 120116A: NOT observations
  61. GRB 120116A: IAC80 I-band observations
  62. GRB 120116A: Bassano Bresciano Observatory optical observations
  63. GRB 120116A: MASTER Early optical limit
  64. GRB 120116A: Swift detection of a burst
  65. GRB 120114A found in ground analysis of BAT data
  66. GRB 111228A: optical observations
  67. GRB 120106A: optical upper limit
  68. GRB 120107A: Suzaku WAM observation of the prompt emission
  69. GRB 110915B, the review of the sky area in plate archives
  70. GRB 120107A: Fermi GBM observation
  71. GRB 120106A: MITSuME Okayama Optical Observation (update)
  72. Konus-Wind observation of GRB 120107A
  73. IPN Triangulation of GRB 120107A
  74. GBM trigger 347620337 (GRB 120107A?) : High-energy photon emission in Fermi/LAT data
  75. GRB 120106A: Swift/UVOT Upper Limits
  76. GRB 120106A: Bassano Bresciano Observatory optical observations
  77. GRB 120106A: MITSuME Okayama Ks-band upper limit
  78. GRB 120106A: MASTER Early OT marginally detection
  79. GRB 120106A: Swift-XRT refined Analysis
  80. GRB 120106A: Swift-BAT refined analysis
  81. GRB 120106A: MITSuME Okayama Optical upper limits
  82. GRB 120106A: Enhanced Swift-XRT position
  83. GRB 120106A: TAROT Calern observatory optical observations
  84. GRB 120106A: MASTER-Tunka optical observations
  85. GRB 120106A: Swift detection of a burst
  86. GRB111228A :LOAO R-band Observations
  87. GRB 111225A, the review of the sky area in plate archives
  88. GRB 111222A, the review of the sky area in plate archives
  89. GRB 111222A: Fermi GBM observations
  90. GRB 111222A: Second Swift observation
  91. GRB111209A: ATCA detection at 5.5, 9, and 18GHz
  92. GRB111225A: RAPTOR Early Detection of the Optical Counterpart
  93. GRB 111211A: Detection of the SN with the 10.4m GTC
  94. GRB 120102A: Fermi GBM observation
  95. Konus-Wind observation of GRB 120102A
  96. GRB 120102A: Swift-BAT refined analysis
  97. GRB 111228A: optical observations in CrAO
  98. GRB 120102A: Swift-XRT refined Analysis
  99. GRB 120102A: Swift/UVOT Detection
  100. GRB 120102A: Enhanced Swift-XRT position

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