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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"

32764 results found.

  1. Swift J1822.3-1606 : Fermi GBM observation
  2. GRB 110719A: Swift-XRT refined Analysis
  3. GRB 110719A: optical upper limit
  4. GRB 110719A: Swift-BAT refined analysis
  5. GRB 110715A optical observations
  6. GRB 110709B : Suzaku WAM observation of the prompt emission
  7. GRB 110715A: ATCA detection of the radio counterpart
  8. Swift J1822.3-1606: Transient Magnetar or Be X-ray Binary?
  9. GRB110715A: GROND Detection of the Optical/NIR Afterglow
  10. GRB 110715A: APEX detection of the submm counterpart
  11. Swift J1822.3-1606
  12. Konus-Wind observation of GRB 110715A
  13. GRB 110715A: Swift-XRT refined Analysis
  14. GRB110715A: VLT redshift
  15. Swift J1822.3-1606: Swift-XRT detection of the X-ray counterpart
  16. GRB 110715A: Swift/UVOT Detection
  17. GRB 110715A: Swift-BAT refined analysis
  18. GRB 110709A / EVLA upper limits
  19. GRB 110709B: Additional Gemini observations and deep limits on an optical afterglow
  20. Swift trigger 457076 is not a GRB
  21. Konus-Wind observation of GRB 110708B
  22. GRB 110709A: Suzaku WAM observation of the prompt emission
  23. GRB 110709B: Submm observations from APEX
  24. GRB 110709A: Konkoly observations
  25. GRB 110708A: Konkoly observations
  26. GRB 110709B BAT refined analysis
  27. GRB 110709B: burst detection from Swift-BAT slew data
  28. GRB 110709B: Swift-XRT refined Analysis
  29. GRB 110709A: Swift-XRT refined Analysis
  30. GRB110709A: MITSuME Ishigakijima Optical upper limits
  31. Konus-Wind observation of GRB 110709A
  32. GRB 110709B: correction to GCN 12135 (Konus-Wind peak flux)
  33. Konus-Wind observation of GRB 110709B
  34. GRB110709A: upper limits from CAHA 1.23m and OSN 1.5m
  35. GRB 110709A: Fermi GBM observation
  36. GRB 110709B: Gemini-South additional analysis and photometry
  37. GRB 110709B : A possible source in USNO B 1.0
  38. GRB 110709B: Preliminary Swift-BAT refined analysis
  39. GRB 110709B: GROND Detection of an Afterglow Candidate
  40. GRB 110709B: Gemini-South optical observations
  41. GRB 110709A: Swift-BAT refined analysis
  42. GRB 110709B: possible quiescent source in DSS
  43. GRB 110709A : Xinglong TNT upper limit
  44. GRB 110708A: Swift/UVOT Observations
  45. GRB 110709A: MASTER-NET optical observations
  46. GRB 110708A: Liverpool Telescope observations
  47. GRB 110708A: Lick observations
  48. GRB 110708A: Swift/XRT afterglow candidate for the INTEGRAL burst
  49. GRB 110625A, the review of the sky area in plate archives
  50. Konus-Wind observation of GRB 110705A
  51. IPN triangulation of short hard GRB 110705A
  52. SGR 1E 1841-045: Swift-BAT refined analysis
  53. GRB 110625A: Suzaku WAM observation of the prompt emission
  54. Swift J185003.2-005627: 1.23m CAHA and BOOTES-3 observations
  55. GRB 110625A: Fermi GBM and LAT observations
  56. GRB 110625A: 1.23m CAHA I-band observations
  57. GRB 110625A: Fermi LAT detection
  58. GRB 110625A: GROND detection of a source inside the XRT error circle
  59. GRB 110625A: NIR Source
  60. GRB 110625A: Konkoly observations
  61. Konus-Wind observation of GRB 110625A
  62. GRB 110625A: Swift-XRT refined Analysis
  63. GRB 110625A: Swift-BAT refined analysis
  64. Swift J185003.2-005627: NIR Observation
  65. GRB 110625A: ROTSE-III Optical Limits
  66. Swift J185003.2-005627: Swift-XRT/UVOT refined analysis
  67. Swift J185003.2-005627: Swift-BAT refined analysis
  68. SGR 1E 1841-045: Swift-BAT refined analysis
  69. GRB 110618A: SMARTS optical observations
  70. GRB 110604A: final update on Swift-XRT observations
  71. SGR 1E 1841-045: Swift detection of a soft gamma repeater burst
  72. Konus-Wind observation of GRB 110618A
  73. IPN triangulation of GRB110618A (long duration, extremely intense)
  74. GRB 110604A: Suzaku WAM observation of the prompt emission
  75. GRB 110610A: Suzaku WAM observation of the prompt emission
  76. GRB 110610A: Fermi GBM detection
  77. GRB 110610A: 1.23m CAHA optical observations
  78. GRB 110610A: Swift-XRT refined Analysis
  79. GRB 110610A: Swift/UVOT Upper Limits
  80. GRB 110610A: Swift-BAT refined analysis
  81. Swift detection of the X-ray afterglow of GRB 110604A
  82. Konus-Wind observation of GRB 110604A
  83. GRB 110530A: optical observations in Mondy observatory
  84. GRB 110529A: Suzaku WAM observation of the prompt emission
  85. GRB 110530A: optical observations at Mt. Terskol, second epoch
  86. GRB 110530A: Swift-XRT refined Analysis
  87. GRB 110530A: Swift/UVOT Detection of a Fading Afterglow
  88. GRB 110530A: Xinglong TNT observation
  89. GRB 110530A: NOT optical observations
  90. GRB 110530A: optical observations at Mt. Terskol
  91. GRB 110530A: Correction to GCN Circ 12050
  92. GRB 110530A: MASTER OT observations
  93. GRB 110530A: Swift-BAT refined analysis
  94. GRB 110529A: Fermi GBM detection
  95. Konus-Wind observation of GRB 110529A
  96. Swift J1644+57/GRB 110328A, Additional HST Observations
  97. GRB 110521A: MASTER prompt optical limit
  98. GRB 110521A: Swift/UVOT Upper Limits
  99. GRB 110521A: Swift-XRT refined analysis
  100. GRB 110520A: NOT optical follow-ups

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