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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"

42424 results found.

  1. GRB 110709B: burst detection from Swift-BAT slew data
  2. GRB 110709B: Swift-XRT refined Analysis
  3. GRB 110709A: Swift-XRT refined Analysis
  4. GRB 110709B: Swift/UVOT Detection of Possible Optical Flaring
  5. GRB110709A: MITSuME Ishigakijima Optical upper limits
  6. Konus-Wind observation of GRB 110709A
  7. GRB 110709B: correction to GCN 12135 (Konus-Wind peak flux)
  8. GRB 110709B: Enhanced Swift-XRT position
  9. Konus-Wind observation of GRB 110709B
  10. GRB110709A: upper limits from CAHA 1.23m and OSN 1.5m
  11. GRB 110709A: Fermi GBM observation
  12. GRB 110709B: Gemini-South additional analysis and photometry
  13. GRB 110709B : A possible source in USNO B 1.0
  14. GRB 110709B: Preliminary Swift-BAT refined analysis
  15. GRB 110709B: GROND Detection of an Afterglow Candidate
  16. GRB 110709B: Gemini-South optical observations
  17. GRB 110709A: Swift-BAT refined analysis
  18. GRB 110709B: possible quiescent source in DSS
  19. GRB 110709A : Xinglong TNT upper limit
  20. GRB 110709B: Swift detection of renewed activity at T+11 minutes.
  21. GRB 110709A: Enhanced Swift-XRT position
  22. GRB 110709B: Swift detection of a burst
  23. GRB 110708A: Swift/UVOT Observations
  24. GRB 110709A: MASTER-NET optical observations
  25. GRB 110709A: Prompt enhanced Swift-XRT position
  26. GRB 110709A: Swift detection of a burst
  27. GRB 110708A: Liverpool Telescope observations
  28. GRB 110708A: Lick observations
  29. GRB 110708A: Swift/XRT afterglow candidate for the INTEGRAL burst
  30. GRB 110705A: Suzaku WAM observation of the prompt emission
  31. GRB 110625A, the review of the sky area in plate archives
  32. GRB 110708A: a long GRB detected by INTEGRAL
  33. Konus-Wind observation of GRB 110705A
  34. Swift trigger 456780 is not a burst
  35. GRB 110705A: Fermi GBM detection
  36. Swift Trigger 456659 is probably not astrophysical
  37. Swift-BAT trigger 456532 is not astrophysical
  38. SGR 1E 1841-045: early optical limit by "Pi of the Sky"
  39. SGR 1E 1841-045: Swift-BAT refined analysis
  40. SGR 1E 1841-045: Swift detection of a soft gamma repeater burst
  41. GRB 110625A: Suzaku WAM observation of the prompt emission
  42. Swift J185003.2-005627: 1.23m CAHA and BOOTES-3 observations
  43. GRB 110625A: Fermi GBM and LAT observations
  44. GRB 110625A: Swift/UVOT Upper Limits
  45. GRB 110625A: 1.23m CAHA I-band observations
  46. GRB 110625A: Fermi LAT detection
  47. GRB 110625A: GROND detection of a source inside the XRT error circle
  48. GRB 110625A: NIR Source
  49. GRB 110625A: Konkoly observations
  50. GRB 110625A: Swift-XRT refined Analysis
  51. GRB 110625A: Swift-BAT refined analysis
  52. Swift J185003.2-005627: NIR Observation
  53. GRB 110625A: ROTSE-III Optical Limits
  54. GRB 110625A: Swift detection of a burst
  55. Swift J185003.2-005627: Swift-XRT/UVOT refined analysis
  56. Swift J185003.2-005627: Swift-BAT refined analysis
  57. Swift J185003.2-005627: TAROT La Silla observatory optical observations
  58. Swift J185003.2-005627: TAROT Calern observatory optical observations
  59. Swift J185003.2-005627: Swift detection of a burst from a new Galactic transient
  60. SGR 1E 1841-045: Swift-BAT refined analysis
  61. GRB 110618A: SMARTS optical observations
  62. GRB 110604A: final update on Swift-XRT observations
  63. SGR 1E 1841-045: Swift detection of a soft gamma repeater burst
  64. Konus-Wind observation of GRB 110618A
  65. IPN triangulation of GRB110618A (long duration, extremely intense)
  66. GRB 110604A: Suzaku WAM observation of the prompt emission
  67. GRB 110610A: Suzaku WAM observation of the prompt emission
  68. GRB 110610A: Fermi GBM detection
  69. GRB 110610A: 1.23m CAHA optical observations
  70. GRB 110610A: Swift-XRT refined Analysis
  71. GRB 110610A: Swift/UVOT Upper Limits
  72. GRB 110610A: Enhanced Swift-XRT position
  73. GRB 110610A: Swift-BAT refined analysis
  74. Swift detection of the X-ray afterglow of GRB 110604A
  75. GRB 110610A: MASTER-NET optical observations
  76. GRB 110610A: Swift detection of a burst
  77. GRB 110604A Detection by IPN Spacecraft and Swift-BAT
  78. GRB 110530A: optical observations in Mondy observatory
  79. GRB 110529A: Suzaku WAM observation of the prompt emission
  80. GMRT detection of GRB 110328A
  81. GRB 110530A: optical observations at Mt. Terskol, second epoch
  82. GRB 110530A: Swift-XRT refined Analysis
  83. GRB 110530A: Swift/UVOT Detection of a Fading Afterglow
  84. GRB 110530A: Xinglong TNT observation
  85. GRB 110530A: Enhanced Swift-XRT position
  86. GRB 110530A: NOT optical observations
  87. GRB110530A: MITSuME Okayama Optical Observation
  88. GRB 110530A: optical observations at Mt. Terskol
  89. GRB 110530A: MASTER OT observations
  90. GRB 110530A: Swift-BAT refined analysis
  91. GRB 110530A: MITSuME Akeno Optical Observation
  92. GRB 110529A: Fermi GBM detection
  93. GRB 110530A: Swift detection of a burst with an optical afterglow
  94. Konus-Wind observation of GRB 110529A
  95. LAT Observations of GRB110529A
  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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