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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"

32760 results found.

  1. GRB 110715A optical observations
  2. GRB 110709B : Suzaku WAM observation of the prompt emission
  3. GRB 110715A: ATCA detection of the radio counterpart
  4. Swift J1822.3-1606: Transient Magnetar or Be X-ray Binary?
  5. GRB110715A: GROND Detection of the Optical/NIR Afterglow
  6. GRB 110715A: APEX detection of the submm counterpart
  7. Swift J1822.3-1606
  8. Konus-Wind observation of GRB 110715A
  9. GRB 110715A: Swift-XRT refined Analysis
  10. GRB110715A: VLT redshift
  11. Swift J1822.3-1606: Swift-XRT detection of the X-ray counterpart
  12. GRB 110715A: Swift/UVOT Detection
  13. GRB 110715A: Swift-BAT refined analysis
  14. GRB 110709A / EVLA upper limits
  15. GRB 110709B: Additional Gemini observations and deep limits on an optical afterglow
  16. Swift trigger 457076 is not a GRB
  17. Konus-Wind observation of GRB 110708B
  18. GRB 110709A: Suzaku WAM observation of the prompt emission
  19. GRB 110709B: Submm observations from APEX
  20. GRB 110709A: Konkoly observations
  21. GRB 110708A: Konkoly observations
  22. GRB 110709B BAT refined analysis
  23. GRB 110709B: burst detection from Swift-BAT slew data
  24. GRB 110709B: Swift-XRT refined Analysis
  25. GRB 110709A: Swift-XRT refined Analysis
  26. GRB110709A: MITSuME Ishigakijima Optical upper limits
  27. Konus-Wind observation of GRB 110709A
  28. GRB 110709B: correction to GCN 12135 (Konus-Wind peak flux)
  29. Konus-Wind observation of GRB 110709B
  30. GRB110709A: upper limits from CAHA 1.23m and OSN 1.5m
  31. GRB 110709A: Fermi GBM observation
  32. GRB 110709B: Gemini-South additional analysis and photometry
  33. GRB 110709B : A possible source in USNO B 1.0
  34. GRB 110709B: Preliminary Swift-BAT refined analysis
  35. GRB 110709B: GROND Detection of an Afterglow Candidate
  36. GRB 110709B: Gemini-South optical observations
  37. GRB 110709A: Swift-BAT refined analysis
  38. GRB 110709B: possible quiescent source in DSS
  39. GRB 110709A : Xinglong TNT upper limit
  40. GRB 110708A: Swift/UVOT Observations
  41. GRB 110709A: MASTER-NET optical observations
  42. GRB 110708A: Liverpool Telescope observations
  43. GRB 110708A: Lick observations
  44. GRB 110708A: Swift/XRT afterglow candidate for the INTEGRAL burst
  45. GRB 110625A, the review of the sky area in plate archives
  46. Konus-Wind observation of GRB 110705A
  47. IPN triangulation of short hard GRB 110705A
  48. SGR 1E 1841-045: Swift-BAT refined analysis
  49. GRB 110625A: Suzaku WAM observation of the prompt emission
  50. Swift J185003.2-005627: 1.23m CAHA and BOOTES-3 observations
  51. GRB 110625A: Fermi GBM and LAT observations
  52. GRB 110625A: 1.23m CAHA I-band observations
  53. GRB 110625A: Fermi LAT detection
  54. GRB 110625A: GROND detection of a source inside the XRT error circle
  55. GRB 110625A: NIR Source
  56. GRB 110625A: Konkoly observations
  57. Konus-Wind observation of GRB 110625A
  58. GRB 110625A: Swift-XRT refined Analysis
  59. GRB 110625A: Swift-BAT refined analysis
  60. Swift J185003.2-005627: NIR Observation
  61. GRB 110625A: ROTSE-III Optical Limits
  62. Swift J185003.2-005627: Swift-XRT/UVOT refined analysis
  63. Swift J185003.2-005627: Swift-BAT refined analysis
  64. SGR 1E 1841-045: Swift-BAT refined analysis
  65. GRB 110618A: SMARTS optical observations
  66. GRB 110604A: final update on Swift-XRT observations
  67. SGR 1E 1841-045: Swift detection of a soft gamma repeater burst
  68. Konus-Wind observation of GRB 110618A
  69. IPN triangulation of GRB110618A (long duration, extremely intense)
  70. GRB 110604A: Suzaku WAM observation of the prompt emission
  71. GRB 110610A: Suzaku WAM observation of the prompt emission
  72. GRB 110610A: Fermi GBM detection
  73. GRB 110610A: 1.23m CAHA optical observations
  74. GRB 110610A: Swift-XRT refined Analysis
  75. GRB 110610A: Swift/UVOT Upper Limits
  76. GRB 110610A: Swift-BAT refined analysis
  77. Swift detection of the X-ray afterglow of GRB 110604A
  78. Konus-Wind observation of GRB 110604A
  79. GRB 110530A: optical observations in Mondy observatory
  80. GRB 110529A: Suzaku WAM observation of the prompt emission
  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: NOT optical observations
  86. GRB 110530A: optical observations at Mt. Terskol
  87. GRB 110530A: Correction to GCN Circ 12050
  88. GRB 110530A: MASTER OT observations
  89. GRB 110530A: Swift-BAT refined analysis
  90. GRB 110529A: Fermi GBM detection
  91. Konus-Wind observation of GRB 110529A
  92. Swift J1644+57/GRB 110328A, Additional HST Observations
  93. GRB 110521A: MASTER prompt optical limit
  94. GRB 110521A: Swift/UVOT Upper Limits
  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: MASTER synchronous and early optical observations limit
  100. Swift/UVOT observations of GRB110520A

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