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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"

36398 results found.

  1. GRB 120211A: Swift/UVOT Upper Limits
  2. GRB 120211A: MASTER early optical observations
  3. GRB 120211A: Swift-BAT refined analysis
  4. GRB 120211A: MITSuME Okayama Ks-band upper limit
  5. GRB 120211A: Enhanced Swift-XRT position
  6. GRB 120211A - Faulkes Telescope South Observations
  7. GRB 120211A: Swift detection of a burst
  8. GRB 120202A, the review of the sky area in plate archives
  9. GRB 111228A, the review of the sky area in plate archives
  10. GRB 120202A: MASTER early optical observations
  11. GRB 120202A: D50 optical limits
  12. GRB 120202A: GROND observations
  13. GRB 120202A: WHT, Gemini & UKIRT candidate afterglow
  14. GRB 120202A: Swift/XRT and UVOT observations
  15. GRB 120202A: TAROT Calern observatory optical observations
  16. GRB 120202A: A long GRB detected by INTEGRAL
  17. GRB 111228A: Possible host detected by Swift/UVOT
  18. GRB 120129A: MASTER optical observations
  19. GRB 120116A, the review of the sky area in plate archives
  20. Konus-Wind observation of GRB 120129A
  21. IPN Triangulation of GRB 120129A (long/intense)
  22. GRB 120127A / P48 Imaging
  23. GRB 120127A: MASTER optical observations
  24. GRB 120127A: MAXI/GSC detection of a probable GRB
  25. GRB 120118B: optical upper limit
  26. GRB 120116A: optical upper limit
  27. GRB 120119A : LOAO Optical Observations
  28. GRB 120119A : SMA submm follow-up observation
  29. Fermi GBM trigger 120123.169 is not a GRB
  30. GRB 120119A: EVLA observations
  31. GRB 120119A: GRT detection of early afterglow
  32. GRB 111225A: optical observations
  33. GRB 120119A: optical upper limit
  34. GRB 120121A: Swift/UVOT Upper Limits
  35. GRB 120121A: Swift-XRT refined Analysis
  36. GRB 120121A: Swift-BAT refined analysis
  37. GRB 120121A: Enhanced Swift-XRT position
  38. GRB 120121A: ISON-NM optical observations
  39. GRB 120121A: Swift-XRT position
  40. GRB 120121A: Swift detection of a burst
  41. GRB 120119A, Swift-BAT refined analysis
  42. GRB 120119A: TAROT La Silla observatory optical observations
  43. GRB120119A: REM NIR observations
  44. GRB 120119A: optical observations
  45. GRB 120119A: Swift/UVOT Observations
  46. GRB 120118B: RTT150 optical observations
  47. GRB 120119A: SMARTS optical/IR afterglow observations
  48. GRB 120119A: Swift-XRT refined Analysis
  49. GRB 120119A: Enhanced Swift-XRT position
  50. GRB 120102A, the review of the sky area in plate archive
  51. GRB 120119A: Fermi GBM observation
  52. GRB 120118B, Swift-BAT refined analysis
  53. Konus-Wind observation of GRB 120119A
  54. GRB 120119A: optical observations
  55. GRB 120118B: TNG NIR observations
  56. GRB 120118B: Swift-XRT refined Analysis
  57. GRB 120118B : Lulin Optical limit
  58. GRB 120119A: MMT redshift confirmation
  59. GRB 120119A: Lick 3m Spectroscopy
  60. GRB 120119A: Gemini-S redshift
  61. GRB 120119A: PROMPT optical observation of early afterglow
  62. GRB 120119A: GROND Detection of the Optical/NIR Afterglow
  63. GRB 120118B: Swift/UVOT Upper Limits
  64. GRB 120119A: Liverpool Telescope afterglow detection
  65. GRB 120119A: PAIRITEL NIR Detection
  66. GRB 120119A: Swift detection of a burst with an optical counterpart
  67. GRB 120118B: NOT observations
  68. GRB 120118B: Enhanced Swift-XRT position
  69. GRB 120118B: Faulkes Telescope South observations
  70. GRB 120118B: Swift-XRT position
  71. GRB 120118B: MASTER optical observations
  72. GRB 120118B: Swift detection of a burst
  73. XRF 120118A: an X-Ray Flash detected by INTEGRAL
  74. GRB 120116A: Swift/UVOT Upper Limits
  75. GRB 120116A: Swift-XRT refined Analysis
  76. GRB 120116A: Enhanced Swift-XRT position
  77. AXP 4U 1042+61: Mondy optical observations
  78. GRB 120116A: Mondy optical observations
  79. GRB 120116A: Gemini optical/IR candidate
  80. GRB 120116A: EVLA observations
  81. GRB 120116A: WHT optical observations
  82. GRB 120116A: Optical observations at Crni Vrh
  83. GRB 120116A: Swift-BAT refined analysis
  84. GRB 120116A: NOT observations
  85. GRB 120116A: IAC80 I-band observations
  86. GRB 120116A: Bassano Bresciano Observatory optical observations
  87. GRB 120116A: MASTER Early optical limit
  88. GRB 120116A: Swift detection of a burst
  89. GRB 120114A found in ground analysis of BAT data
  90. GRB 111228A: optical observations
  91. GRB 120106A: optical upper limit
  92. GRB 120107A: Suzaku WAM observation of the prompt emission
  93. GRB 110915B, the review of the sky area in plate archives
  94. GRB 120107A: Fermi GBM observation
  95. GRB 120106A: MITSuME Okayama Optical Observation (update)
  96. Konus-Wind observation of GRB 120107A
  97. IPN Triangulation of GRB 120107A
  98. GBM trigger 347620337 (GRB 120107A?) : High-energy photon emission in Fermi/LAT data
  99. GRB 120106A: Swift/UVOT Upper Limits
  100. GRB 120106A: Bassano Bresciano Observatory optical observations

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