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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"

28292 results found.

  1. GRB 120121A: Swift/UVOT Upper Limits
  2. GRB 120121A: Swift-XRT refined Analysis
  3. GRB 120121A: Swift-BAT refined analysis
  4. GRB 120121A: Enhanced Swift-XRT position
  5. GRB 120121A: ISON-NM optical observations
  6. GRB 120121A: Swift detection of a burst
  7. GRB 120119A, Swift-BAT refined analysis
  8. GRB 120119A: TAROT La Silla observatory optical observations
  9. GRB120119A: REM NIR observations
  10. GRB 120119A: optical observations
  11. GRB 120119A: Swift/UVOT Observations
  12. GRB 120118B: RTT150 optical observations
  13. GRB 120119A: SMARTS optical/IR afterglow observations
  14. GRB 120119A: Swift-XRT refined Analysis
  15. GRB 120119A: Enhanced Swift-XRT position
  16. GRB 120102A, the review of the sky area in plate archive
  17. GRB 120119A: Fermi GBM observation
  18. GRB 120118B, Swift-BAT refined analysis
  19. GRB 120119A: optical observations
  20. GRB 120118B: TNG NIR observations
  21. GRB 120118B: Swift-XRT refined Analysis
  22. GRB 120118B : Lulin Optical limit
  23. GRB 120119A: PROMPT optical observation of early afterglow
  24. GRB 120119A: GROND Detection of the Optical/NIR Afterglow
  25. GRB 120118B: Swift/UVOT Upper Limits
  26. GRB 120119A: PAIRITEL NIR Detection
  27. GRB 120119A: Swift detection of a burst with an optical counterpart
  28. GRB 120118B: NOT observations
  29. GRB 120118B: Enhanced Swift-XRT position
  30. XRF 120118A: early optical limit by "Pi of the Sky"
  31. GRB 120118B: Swift detection of a burst
  32. XRF 120118A: Optical candidate
  33. XRF 120118A: further INTEGRAL analysis
  34. GRB 120116A: Swift/UVOT Upper Limits
  35. GRB 120116A: Swift-XRT refined Analysis
  36. GRB 120116A: Enhanced Swift-XRT position
  37. AXP 4U 1042+61: Mondy optical observations
  38. GRB 120116A: Mondy optical observations
  39. GRB 120116A: WHT optical observations
  40. GRB 120116A: Optical observations at Crni Vrh
  41. GRB 120116A: Swift-BAT refined analysis
  42. GRB 120116A: NOT observations
  43. GRB 120116A: IAC80 I-band observations
  44. GRB 120116A: Bassano Bresciano Observatory optical observations
  45. GRB 120116A: Swift detection of a burst
  46. GRB 120114A found in ground analysis of BAT data
  47. GRB 111228A: optical observations
  48. AXP 4U 0142+61: Swift-BAT refined analysis (trigger 511611)
  49. GRB 120106A: optical upper limit
  50. Swift detection of an SGR burst from AXP 4U 0142+61
  51. GRB 120107A: Suzaku WAM observation of the prompt emission
  52. GRB 110915B, the review of the sky area in plate archives
  53. GRB 120107A: Fermi GBM observation
  54. GBM trigger 347620337 (GRB 120107A?) : High-energy photon emission in Fermi/LAT data
  55. GRB 120106A: Swift/UVOT Upper Limits
  56. GRB 120106A: Bassano Bresciano Observatory optical observations
  57. GRB 120106A: MITSuME Okayama Ks-band upper limit
  58. GRB 120106A: Swift-XRT refined Analysis
  59. INTEGRAL Weak trigger #6433: GRT Optical Observation
  60. GRB 120106A: Swift-BAT refined analysis
  61. GRB 120106A: MITSuME Okayama Optical upper limits
  62. GRB 120106A: Enhanced Swift-XRT position
  63. GRB 120106A: TAROT Calern observatory optical observations
  64. GRB 120106A: Swift detection of a burst
  65. GRB111228A :LOAO R-band Observations
  66. GRB 111225A, the review of the sky area in plate archives
  67. GRB 111222A, the review of the sky area in plate archives
  68. GRB 111222A: Second Swift observation
  69. GRB 111211A: Detection of the SN with the 10.4m GTC
  70. GRB 120102A: Fermi GBM observation
  71. GRB 120102A: Swift-BAT refined analysis
  72. GRB 111228A: optical observations in CrAO
  73. GRB 120102A: Swift-XRT refined Analysis
  74. GRB 120102A: Swift/UVOT Detection
  75. GRB 120102A: Enhanced Swift-XRT position
  76. GRB 120102A: Swift detection of a burst with an optical counterpart
  77. GRB 111225A: optical observations in CrAO
  78. GRB 111228A: LOAO Optical Observation
  79. GRB 110915A, the review of the sky area in plate archives
  80. GRB 111229A: Swift/UVOT Detection
  81. GRB 111229A: Faulkes Telescope South observations
  82. GRB 111229A: Swift-XRT refined Analysis
  83. GRB 111229A: Enhanced Swift-XRT position
  84. GRB 111228A: Continued Skynet PROMPT/Dolomiti Optical Observations
  85. GRB 111229A: Gemini-South Redshift
  86. GRB 111229A: Swift-BAT refined analysis
  87. GRB 111229A: GROND afterglow candidate
  88. GRB 111229A: Swift detection of a burst
  89. GRB 111228A: Liverpool Telescope Observations
  90. GRB 111225A: Lightbuckets Optical Observations
  91. GRB 111228A: P60 Observations
  92. GRB 111228A: T100 observations
  93. GRB111228A: MITSuME Akeno photometry of the optical afterglow
  94. GRB 111228A: GMG optical observation
  95. GRB 111228A: Swift-XRT refined Analysis
  96. FERMI GRB111228.45: MASTER observations
  97. GRB 111228A: PAIRITEL NIR Detection
  98. GRB 111228A: TAROT La Silla observatory observations
  99. GRB 111228A: GROND observations
  100. GRB111228A: Errata of MITSuME Okayama about GRB name in GCNC 12743

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