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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"

19678 results found.

  1. GRB 110422A: optical observations in CrAO
  2. GRB 110428A : Swift-XRT observations
  3. GRB 110426A: MASTER synchronous with MAXI/GSC observations
  4. GRB 110422A: optical observations in CrAO, second epoch
  5. GRB110422A: NOT optical follow-ups
  6. GRB 110422A: optical observations in CrAO
  7. GRB110422A: MITSuME Ishigakijima Optical Observation
  8. GRB 110422A: Further NOT observation
  9. GRB 110422A: Swift/UVOT Detection of optical afterglow
  10. GRB 110422A: Enhanced Swift-XRT position
  11. GRB 110422A: TNG optical observations
  12. GRB 110422A: SAO RAS optical observations
  13. GRB 110422A: NOT optical observation
  14. GRB 110422A: Swift-BAT refined analysis
  15. GRB 110422A: Mondy optical observations
  16. GRB 110422A: Swift detection of a burst
  17. GRB 110420B: Swift/UVOT Upper Limits
  18. GRB110420A: GROND detection of the Optical/NIR Afterglow Candidate
  19. GRB 110420B: Swift-XRT afterglow candidate retraction
  20. GRB 110420B, GROND observations
  21. GRB 110420A Swift/UVOT Observations
  22. GRB 110420B: Swift-BAT refined analysis
  23. GRB 110420A: Swift-BAT refined analysis
  24. GRB 110420A: Enhanced Swift-XRT position
  25. GRB 110420A: Swift detection of a burst with optical counterpart
  26. GRB110414A: MITSuME Ishigakijima Optical upper limits
  27. GRB 110414A: GROND upper limits
  28. GRB110414A: MITSuME Okayama Optical upper limits
  29. GRB 110414A: Swift/UVOT Upper limits
  30. GRB 110414A: Enhanced Swift-XRT position
  31. GRB 110328A / Swift J164449.3+573451: WISE quiescent source upper limit
  32. GRB 110414A: Swift detection of a burst
  33. GRB 110411A: PAIRITEL NIR Upper Limits
  34. GRB 110411A: Swift-XRT refined Analysis
  35. GRB 110411A: Swift/UVOT Upper Limits
  36. GRB 110411A: Enhanced Swift-XRT position
  37. GRB 110411A: Swift detection of a burst
  38. GRB 110328A/Swift J164449.3+573451 UVOT Upper Limits
  39. GRB110407A: UVOT Upper Limits
  40. GRB 110407A: GROND Detection of the Optical Afterglow
  41. GRB 110407A: MITSuME Okayama and Ishigakijima Optical upper limits
  42. GRB 110407A: NOT optical observations
  43. GRB 110407A: Enhanced Swift-XRT position
  44. IPN triangulation of the bright GRB110406A
  45. GRB 110407A: Swift detection of a burst
  46. Konus-Wind observation of GRB 110406A
  47. GRB 110328A/Swift J164449.3+573451: BAT recent rate increase and pre-outburst,light curve
  48. GRB 110402A: fading optical afterglow
  49. GRB 110328A / Swift J164449.3+573451, HST Observations
  50. GRB 110402A: Konus-Wind spectral lags and detailed energetics
  51. GRB 110402A: optical observations in Mondy
  52. GRB 110402A: MITSuME Okayama and Ishigakijima Optical upper limits
  53. GRB 110328A/Swift J164449.3+573451: SARA-N detection
  54. GRB 110402A: Swift/UVOT detection of afterglow candidate
  55. GRB 110402A: Konkoly observations
  56. GRB 110328A: Konkoly observations.
  57. GRB 110402A: early optical limit by "Pi of the Sky"
  58. GRB 110402A: further NOT observations
  59. GRB110328A/Swift J164449.3+573451: Fermi LAT Observations
  60. GRB 110402A: PAIRITEL NIR Upper Limits
  61. GRB 110402A: Enhanced Swift-XRT position
  62. GRB 110402A: NOT afterglow confirmation
  63. GRB 110402A: Swift detection of a burst
  64. GRB 110328A / Swift J164449.3+573451: Radio-optical/NIR Astrometry
  65. GRB 110328A / Swift J164449.3+573451: Mondy optical observations
  66. GRB 110328A / Swift J164449.3+573451: KASINICS K-band Observation
  67. GRB 110328A / Swift J164449.3+573451: X-ray analysis and a mini-blazar analogy
  68. GRB 110328A / Swift J164449.3+573451: PAIRITEL NIR Detection in 2nd Epoch
  69. GRB 110328A / Swift J164449.3+573451: No optical variability of the optical counterpart
  70. GRB 110328A / Swift J164449.3+573451: beamed emission
  71. GRB 110328A / Swift J164449.3+573451: Konkoly observations
  72. GRB 110328A / Swift J164449.3+573451: LOAO R-band Observation
  73. GRB 110328A / Swift J164449.3+573451: PAIRITEL NIR Upper Limits
  74. GRB 110328A / Swift J164449.3+573451: optical observations
  75. GRB 110328A / Swift J164449.3+573451: optical spectroscopy from GTC
  76. GRB 110213A, the review of the sky area in plate archives
  77. GRB 110328A / Swift J164449.3+573451: NOT optical observations.
  78. GRB / X-ray transient 110328A: MITSuME OkayamaOptical upper limits
  79. GRB 110328A / Swift J164449.3+573451: PTF Quiescent Optical Counterpart
  80. GRB 110328A: Enhanced Swift-XRT position
  81. GRB 110328A: Swift detection of a burst
  82. GRB 110319B Swift-XRT afterglow confirmation
  83. GRB 110319B: Swift/UVOT Upper Limits
  84. GRB 110318B: Swift/UVOT Upper Limits
  85. GRB 110319B: GROND upper limits
  86. GRB 110319B: Swift-XRT afterglow candidate.
  87. GRB 110319B found in ground analysis of Swift-BAT data
  88. GRB 110319A: Swift/UVOT Detection
  89. GRB 110318B: GROND upper limits
  90. GRB 110319A: Enhanced Swift-XRT position
  91. GRB 110319A: Swift detection of a burst
  92. GRB 110318A: Fermi GBM detection
  93. GRB 110318B: Enhanced Swift-XRT position
  94. GRB 110318A: Swift-BAT refined analysis
  95. GRB 110318B: Swift/UVOT Non-Detection of an Afterglow
  96. GRB 110318B: Swift detection of a burst
  97. GRB 110315A: RTT150 optical observations
  98. GRB 110315A: Swift/UVOT Upper Limits
  99. GRB 110315A: Swift-XRT refined Analysis
  100. GRB 110315A: Enhanced Swift-XRT position

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