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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"

42812 results found.

  1. GRB 120118B: Faulkes Telescope South observations
  2. GRB 120118B: Swift-XRT position
  3. GRB 120118B: MASTER optical observations
  4. GRB 120118B: Swift detection of a burst
  5. XRF 120118A: Optical candidate
  6. XRF 120118A: further INTEGRAL analysis
  7. XRF 120118A: an X-Ray Flash detected by INTEGRAL
  8. GRB 120116A: Swift/UVOT Upper Limits
  9. GRB 120116A: Swift-XRT refined Analysis
  10. GRB 120116A: Enhanced Swift-XRT position
  11. AXP 4U 1042+61: Mondy optical observations
  12. GRB 120116A: Mondy optical observations
  13. GRB 120116A: Gemini optical/IR candidate
  14. GRB 120116A: EVLA observations
  15. GRB 120116A: WHT optical observations
  16. GRB 120116A: Optical observations at Crni Vrh
  17. GRB 120116A: Swift-BAT refined analysis
  18. GRB 120116A: NOT observations
  19. GRB 120116A: IAC80 I-band observations
  20. GRB 120116A: Bassano Bresciano Observatory optical observations
  21. GRB 120116A: MASTER Early optical limit
  22. GRB 120116A: Swift detection of a burst
  23. GRB 120114A found in ground analysis of BAT data
  24. GRB 111228A: optical observations
  25. AXP 4U 0142+61: Swift-BAT refined analysis (trigger 511611)
  26. GRB 120106A: optical upper limit
  27. Swift detection of an SGR burst from AXP 4U 0142+61
  28. GRB 120107A: Suzaku WAM observation of the prompt emission
  29. GRB 120107A: Fermi GBM observation
  30. GRB 120106A: MITSuME Okayama Optical Observation (update)
  31. Konus-Wind observation of GRB 120107A
  32. IPN Triangulation of GRB 120107A
  33. GBM trigger 347620337 (GRB 120107A?) : High-energy photon emission in Fermi/LAT data
  34. GRB 120106A: Bassano Bresciano Observatory optical observations
  35. GRB 120106A: MITSuME Okayama Ks-band upper limit
  36. GRB 120106A: MASTER Early OT marginally detection
  37. GRB 120106A: Swift-XRT refined Analysis
  38. INTEGRAL Weak trigger #6433: GRT Optical Observation
  39. GRB 120106A: Swift-BAT refined analysis
  40. GRB 120106A: Enhanced Swift-XRT position
  41. GRB 120106A: TAROT Calern observatory optical observations
  42. GRB 120106A: MASTER-Tunka optical observations
  43. GRB 120106A: Swift detection of a burst
  44. GRB111228A :LOAO R-band Observations
  45. GRB 111222A: Fermi GBM observations
  46. GRB 111222A: Second Swift observation
  47. GRB111225A: RAPTOR Early Detection of the Optical Counterpart
  48. GRB 111211A: Detection of the SN with the 10.4m GTC
  49. GRB 120102A: Fermi GBM observation
  50. Konus-Wind observation of GRB 120102A
  51. GRB 120102A: Swift-BAT refined analysis
  52. GRB 111228A: optical observations in CrAO
  53. GRB 120102A: Swift-XRT refined Analysis
  54. GRB 120102A: Swift/UVOT Detection
  55. GRB 120102A: Enhanced Swift-XRT position
  56. GRB 120102A: Swift detection of a burst with an optical counterpart
  57. GRB 111225A: optical observations in CrAO
  58. GRB 111228A: LOAO Optical Observation
  59. Konus-Wind observation of GRB 111228A
  60. GRB 111228A: MASTER-Net optical photometry
  61. GRB 111228A: correction for GCN 12787
  62. GRB 111228A: Optical and NIR observations with Kanata telescope
  63. GRB 111228A: SMARTS optical/IR afterglow observations
  64. GRB 111229A: Swift/UVOT Detection
  65. GRB 111229A: Faulkes Telescope South observations
  66. GRB 111229A: Swift-XRT refined Analysis
  67. GRB 111229A: Enhanced Swift-XRT position
  68. GRB 111228A: Continued Skynet PROMPT/Dolomiti Optical Observations
  69. GRB111228A: Further GMG observations
  70. GRB 111229A: Gemini-South Redshift
  71. GRB 111229A: Swift-BAT refined analysis
  72. GRB 111229A: GROND afterglow candidate
  73. GRB 111229A: Swift detection of a burst
  74. GRB 111228A: Liverpool Telescope Observations
  75. GRB 111228A: P60 Observations
  76. GRB 111228A: X-shooter spectroscopy
  77. GRB 111228A: T100 observations
  78. GRB 111228A: GMG optical observation
  79. GRB 111228A: Swift-XRT refined Analysis
  80. GRB 111228A: NOT redshift
  81. GRB111228A: TNG spectroscopy analysis
  82. FERMI GRB111228.45: MASTER observations
  83. GRB 111228A: Gemini South Redshift
  84. GRB 111228A: PAIRITEL NIR Detection
  85. GRB 111228A: MMT Redshift
  86. GRB 111228A: TAROT La Silla observatory observations
  87. GRB 111228A: GROND observations
  88. GRB 111228A: MASTER OT observations
  89. GRB 111228A: GRAS017 optical observations
  90. GRB 111228A: IAC80 BVI-band observations
  91. GRB 111228A: Skynet/Dolomiti Optical Observations
  92. GRB 111228A: NOT optical observation
  93. GRB 111228A, Swift-BAT refined analysis
  94. GRB 111228A: optical observations
  95. GRB 111228A: Enhanced Swift-XRT position
  96. GRB 111228A: TAROT Calern observatory. OT decay stopped
  97. GRB 111228A, optical observations
  98. GRB 111228A: Fermi GBM observation
  99. GRB 111228A: TAROT Calern observatory. OT seems still bright
  100. GRB 111228A: Possible host galaxy in the SDSS arhive

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