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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"

28253 results found.

  1. GRB 120219A: Swift-BAT refined analysis
  2. GRB 120219A: Enhanced Swift-XRT position
  3. GRB120219A: TNT optical afterglow candidates
  4. GRB 120219A: MASTER-NET prompt and early optical observations
  5. GRB 120219A: Swift detection of a burst
  6. GRB 120218A: Swift-BAT refined analysis
  7. GRB 120215A: Swift/UVOT Upper Limits
  8. GRB 120215A: MITSuME Okayama Optical upper limits
  9. GRB 120215A: Swift-XRT refined Analysis
  10. Fermi GBM detection of an SGR-like burst
  11. GRB 120215A: Enhanced Swift-XRT position
  12. Skynet/PROMPT observations of GRB120215A
  13. GRB 120215A: Swift-BAT refined analysis
  14. GRB 120215A: Swift detection of a burst
  15. GRB 120211A : LOAO optical observations
  16. GRB 120213A: Swift-XRT refined Analysis
  17. GRB 120213A: Swift/UVOT Upper Limits
  18. GRB 120212A: GMG optical observation
  19. GRB 120213A: Enhanced Swift-XRT position
  20. GRB 120212A: MITSuME Ishigakijima Optical Observation
  21. GRB 120213A: Swift-BAT refined analysis
  22. GRB 120212A: Swift-XRT refined Analysis
  23. GRB 120213A: Swift detection of a burst
  24. GRB 120212A: NOT optical observation
  25. GRB 120212A: Swift/UVOT Detection
  26. GRB 120212A: Swift-BAT refined analysis
  27. GRB 120212A: Enhanced Swift-XRT position
  28. GRB 120211A: MITSuME Okayama Ks-band Observation
  29. GRB 120212A: Swift-XRT observations
  30. GRB 120212A: Swift/UVOT detection
  31. GRB 120212A: Faulkes Telescope South afterglow candidate
  32. GRB 120211A: GROND Upper limits
  33. GRB 120211A: MITSuME Okayama and Ishigakijima Optical upper limits
  34. GRB 120211A: Swift-XRT refined Analysis
  35. GRB 120211A: Swift/UVOT Upper Limits
  36. GRB 120211A: Swift-BAT refined analysis
  37. GRB 120211A: MITSuME Okayama Ks-band upper limit
  38. GRB 120211A: Enhanced Swift-XRT position
  39. GRB 120211A - Faulkes Telescope South Observations
  40. GRB 120211A: Swift detection of a burst
  41. GRB 120202A, the review of the sky area in plate archives
  42. GRB 111228A, the review of the sky area in plate archives
  43. LS I +61 303: Swift-BAT refined analysis
  44. GRB 120202A: D50 optical limits
  45. Swift detection of a burst from LS I +61 303
  46. GRB 120202A: GROND observations
  47. GRB 120202A: WHT, Gemini & UKIRT candidate afterglow
  48. GRB 120202A: Swift/XRT and UVOT observations
  49. GRB 120202A: TAROT Calern observatory optical observations
  50. GRB 120202A: A long GRB detected by INTEGRAL
  51. GRB 120129A: MASTER optical observations
  52. GRB 120116A, the review of the sky area in plate archives
  53. GRB 120127A / P48 Imaging
  54. GRB 120127A: MAXI/GSC detection of a probable GRB
  55. GRB 120118B: optical upper limit
  56. GRB 120116A: optical upper limit
  57. GRB 120119A : LOAO Optical Observations
  58. GRB 120119A : SMA submm follow-up observation
  59. GRB 120119A: GRT detection of early afterglow
  60. GRB 111225A: optical observations
  61. GRB 120119A: optical upper limit
  62. GRB 120121A: Swift/UVOT Upper Limits
  63. GRB 120121A: Swift-XRT refined Analysis
  64. GRB 120121A: Swift-BAT refined analysis
  65. GRB 120121A: Enhanced Swift-XRT position
  66. GRB 120121A: ISON-NM optical observations
  67. GRB 120121A: Swift detection of a burst
  68. GRB 120119A, Swift-BAT refined analysis
  69. GRB 120119A: TAROT La Silla observatory optical observations
  70. GRB120119A: REM NIR observations
  71. GRB 120119A: optical observations
  72. GRB 120119A: Swift/UVOT Observations
  73. GRB 120118B: RTT150 optical observations
  74. GRB 120119A: SMARTS optical/IR afterglow observations
  75. GRB 120119A: Swift-XRT refined Analysis
  76. GRB 120119A: Enhanced Swift-XRT position
  77. GRB 120102A, the review of the sky area in plate archive
  78. GRB 120119A: Fermi GBM observation
  79. GRB 120118B, Swift-BAT refined analysis
  80. GRB 120119A: optical observations
  81. GRB 120118B: TNG NIR observations
  82. GRB 120118B: Swift-XRT refined Analysis
  83. GRB 120118B : Lulin Optical limit
  84. GRB 120119A: PROMPT optical observation of early afterglow
  85. GRB 120119A: GROND Detection of the Optical/NIR Afterglow
  86. GRB 120118B: Swift/UVOT Upper Limits
  87. GRB 120119A: PAIRITEL NIR Detection
  88. GRB 120119A: Swift detection of a burst with an optical counterpart
  89. GRB 120118B: NOT observations
  90. GRB 120118B: Enhanced Swift-XRT position
  91. XRF 120118A: early optical limit by "Pi of the Sky"
  92. GRB 120118B: Swift detection of a burst
  93. XRF 120118A: Optical candidate
  94. XRF 120118A: further INTEGRAL analysis
  95. GRB 120116A: Swift/UVOT Upper Limits
  96. GRB 120116A: Swift-XRT refined Analysis
  97. GRB 120116A: Enhanced Swift-XRT position
  98. AXP 4U 1042+61: Mondy optical observations
  99. GRB 120116A: Mondy optical observations
  100. GRB 120116A: WHT optical observations

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