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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"

42468 results found.

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

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