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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"

43895 results found.

  1. GRB 110709B: Enhanced Swift-XRT position
  2. Konus-Wind observation of GRB 110709B
  3. GRB110709A: upper limits from CAHA 1.23m and OSN 1.5m
  4. GRB 110709A: Fermi GBM observation
  5. GRB 110709B: Gemini-South additional analysis and photometry
  6. GRB 110709B : A possible source in USNO B 1.0
  7. GRB 110709B: Preliminary Swift-BAT refined analysis
  8. GRB 110709B: GROND Detection of an Afterglow Candidate
  9. GRB 110709B: Gemini-South optical observations
  10. GRB 110709A: Swift-BAT refined analysis
  11. GRB 110709B: possible quiescent source in DSS
  12. GRB 110709A : Xinglong TNT upper limit
  13. GRB 110709B: Swift detection of renewed activity at T+11 minutes.
  14. GRB 110709A: Enhanced Swift-XRT position
  15. GRB 110709B: Swift detection of a burst
  16. GRB 110708A: Swift/UVOT Observations
  17. GRB 110709A: MASTER-NET optical observations
  18. GRB 110709A: Prompt enhanced Swift-XRT position
  19. GRB 110709A: Swift detection of a burst
  20. GRB 110708A: Liverpool Telescope observations
  21. GRB 110708A: Lick observations
  22. GRB 110708A: Swift/XRT afterglow candidate for the INTEGRAL burst
  23. GRB 110705A: Suzaku WAM observation of the prompt emission
  24. GRB 110625A, the review of the sky area in plate archives
  25. GRB 110708A: a long GRB detected by INTEGRAL
  26. Konus-Wind observation of GRB 110705A
  27. IPN triangulation of short hard GRB 110705A
  28. Swift trigger 456780 is not a burst
  29. GRB 110705A: Fermi GBM detection
  30. Swift Trigger 456659 is probably not astrophysical
  31. Swift-BAT trigger 456532 is not astrophysical
  32. SGR 1E 1841-045: early optical limit by "Pi of the Sky"
  33. SGR 1E 1841-045: Swift-BAT refined analysis
  34. SGR 1E 1841-045: Swift detection of a soft gamma repeater burst
  35. GRB 110625A: Suzaku WAM observation of the prompt emission
  36. Swift J185003.2-005627: 1.23m CAHA and BOOTES-3 observations
  37. GRB 110625A: Fermi GBM and LAT observations
  38. GRB 110625A: Swift/UVOT Upper Limits
  39. GRB 110625A: 1.23m CAHA I-band observations
  40. GRB 110625A: Fermi LAT detection
  41. GRB 110625A: GROND detection of a source inside the XRT error circle
  42. GRB 110625A: NIR Source
  43. GRB 110625A: Konkoly observations
  44. Konus-Wind observation of GRB 110625A
  45. GRB 110625A: Swift-XRT refined Analysis
  46. GRB 110625A: Swift-BAT refined analysis
  47. Swift J185003.2-005627: NIR Observation
  48. GRB 110625A: ROTSE-III Optical Limits
  49. GRB 110625A: Swift detection of a burst
  50. Swift J185003.2-005627: Swift-XRT/UVOT refined analysis
  51. Swift J185003.2-005627: Swift-BAT refined analysis
  52. Swift J185003.2-005627: TAROT La Silla observatory optical observations
  53. Swift J185003.2-005627: TAROT Calern observatory optical observations
  54. Swift J185003.2-005627: Swift detection of a burst from a new Galactic transient
  55. SGR 1E 1841-045: Swift-BAT refined analysis
  56. GRB 110618A: SMARTS optical observations
  57. GRB 110604A: final update on Swift-XRT observations
  58. SGR 1E 1841-045: Swift detection of a soft gamma repeater burst
  59. Konus-Wind observation of GRB 110618A
  60. IPN triangulation of GRB110618A (long duration, extremely intense)
  61. Fermi Gamma-ray Burst Monitor trigger 110621949 is not a GRB
  62. GRB 110604A: Suzaku WAM observation of the prompt emission
  63. GRB 110610A: Suzaku WAM observation of the prompt emission
  64. GRB 110610A: Fermi GBM detection
  65. GRB 110610A: 1.23m CAHA optical observations
  66. GRB 110610A: Swift-XRT refined Analysis
  67. GRB 110610A: Swift/UVOT Upper Limits
  68. GRB 110610A: Enhanced Swift-XRT position
  69. GRB 110610A: Swift-BAT refined analysis
  70. Swift detection of the X-ray afterglow of GRB 110604A
  71. GRB 110610A: MASTER-NET optical observations
  72. GRB 110610A: Swift detection of a burst
  73. Konus-Wind observation of GRB 110604A
  74. GRB 110604A Detection by IPN Spacecraft and Swift-BAT
  75. GRB 110530A: optical observations in Mondy observatory
  76. GRB 110529A: Suzaku WAM observation of the prompt emission
  77. GMRT detection of GRB 110328A
  78. GRB 110530A: optical observations at Mt. Terskol, second epoch
  79. GRB 110530A: Swift-XRT refined Analysis
  80. GRB 110530A: Swift/UVOT Detection of a Fading Afterglow
  81. GRB 110530A: Enhanced Swift-XRT position
  82. GRB 110530A: NOT optical observations
  83. GRB 110530A: optical observations at Mt. Terskol
  84. GRB 110530A: MASTER OT observations
  85. GRB 110530A: Swift-BAT refined analysis
  86. GRB 110530A: MITSuME Akeno Optical Observation
  87. GRB 110529A: Fermi GBM detection
  88. GRB 110530A: Swift detection of a burst with an optical afterglow
  89. Konus-Wind observation of GRB 110529A
  90. LAT Observations of GRB110529A
  91. EVLA afterglow limits on the high z GRB090429B
  92. Fermi Gamma-ray Burst Monitor trigger 328195911 is not a GRB
  93. Swift J1644+57/GRB 110328A, Additional HST Observations
  94. GRB 110521A: MASTER prompt optical limit
  95. GRB 110521A: Swift-XRT refined analysis
  96. GRB 110520A: NOT optical follow-ups
  97. GRB 110521A - NOT optical observation
  98. GRB 110521A: Swift-BAT refined analysis
  99. GRB 110521A: Enhanced Swift-XRT position
  100. GRB 110521A: MASTER synchronous and early optical observations limit

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