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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"

28291 results found.

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

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