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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"

37222 results found.

  1. Swift-BAT GRB 050528: a soft burst
  2. Update on Swift-BAT GRB 050528 (Trigger 130679)
  3. GRB050528: BOOTES optical candidate (retraction)
  4. GRB050504: Ashra-P2/3 monitor and Ashra-AFT response
  5. GRB050528: BOOTES optical candidate
  6. Possible GRB050528: no candidate from Liverpool Telescope
  7. Swift-BAT detection of possible GRB 050528
  8. GRB050525a: Radio Observations
  9. GRB 050509b: refined XRT/Chandra afterglow position analysis
  10. GRB 050525: RTT150, Optical observations
  11. GRB050525a: optical upper limits
  12. GRB 050525a: SARA Observations
  13. GRB 050525B: Swift-BAT observations
  14. GRB 050525: MITSuME Optical Observation in VRI
  15. GRB 050525a: MDM Observations
  16. GRB050525A,optical observation
  17. GRB 050525 : Lulin optical afterglow observations
  18. GRB050525: Super-LOTIS observations
  19. GRB 050525, spectral lag pseudo-redshift
  20. GRB 050525a: Gemini/GMOS Spectra
  21. GRB050306: optical afterglow not confirmed
  22. GRB 050525: BART optical observation
  23. GRB 050525A: BOOTES simultaneous optical observations
  24. GRB 050525A: Swift-BAT refined analysis
  25. GRB050525: Optical observations
  26. GRB 050525B: INTEGRAL shows it is unrelated to GRB050525A
  27. GRB 050525: pseudo-redshift
  28. Swift/UVOT UV and optical detections of GRB 050525
  29. Konus-Wind observation of GRB 050525
  30. GRB 050525: TAROT observations of the early afterglow
  31. INTEGRAL detection of GRB 050525
  32. GRB 050525, infrared observations
  33. GRB 050525: Optical observation
  34. GRB 050525: observatons of the optical afterglow
  35. GRB050525: ROTSE-III Refined Analysis
  36. GRB 050525 - Very Bright, Not Short
  37. GRB 050525: Swift Detection of a Bright, Possibly Short Burst
  38. GRB 050525A: ROTSE-III Detection of Possible Counterpart
  39. XRF050522: NIR observations of XRT candidate
  40. XRF050522: Radio Observations
  41. GRB 050509A: Further I-band imaging
  42. GRB050522,optical observation
  43. GRB050520,optical observation
  44. XRF 050522: Continued NIR P200 Monitoring
  45. RBO Observations of GRB050522
  46. GRB050509b: optical observations
  47. Recent GRB BVRcIc field photometry
  48. GRB050520: Radio Observations
  49. XRF050522, BVRcIc field photometry
  50. XRF050522: Optical Observations
  51. XRF 050522: KAIT observations
  52. XRF 050522 detected with INTEGRAL
  53. GRB 050520: VLT/ULTRACAM observations
  54. Swift UVOT Observations of GRB 050520
  55. GRB 050520: Swift XRT refined analysis
  56. RBO Observations of GRB050520
  57. GRB 050520: P200 Observations
  58. GRB050520: Liverpool Telescope follow-up
  59. GRB 050520: TAROT optical limit
  60. GRB 050520: Swift XRT position
  61. GRB 050520: VLT/ULTRACAM observations
  62. GRB 050520: OSN optical observations
  63. GRB 050520: BART optical limit
  64. GRB 050520 - A long GRB detected with INTEGRAL
  65. Swift-BAT trigger 122203 is not a real GRB
  66. GRB 050504: Swift XRT afterglow candidate has faded
  67. XRF 050509c optical afterglow
  68. GRB 050509B and short GRB-SN association? (corrected)
  69. GRB 050509B and short GRB-SN association?
  70. GRB 050509B: Subaru Optical Observations
  71. GRB050502b: Early Observation
  72. GRB050509b, Bok telescope B-band imaging
  73. Refined Chandra analysis of GRB 050509b
  74. GRB050509b, SDSS pre-burst observations
  75. GRB 050509b: Keck/Chandra Cross-Correlation
  76. GRB 050509b: Keck/Chandra Cross-Correlation
  77. Chandra observation of GRB 050509b
  78. GRB 050509b: RAPTOR deep, early limits.
  79. GRB050509B: Optical/Infared observations
  80. GRB 050509b: Swift/UVOT follow-up measurements
  81. GRB 050509b Milagro GeV/TeV Observations
  82. GRB050509B: Optical observations at the Very Large Telescope
  83. GRB 050509b: No Optical Variability in XRT Error Circle
  84. GRB050416: Afterglow detection at 188 nm with Swift UVOT
  85. GRB 050509a: Swift-BAT refined analysis
  86. GRB 050509c: ROTSE-III Optical Limits
  87. GRB 050509B: WSRT Radio Observations
  88. GRB050509c: REM NIR and Optical observations (errata corrige to GCN 3400)
  89. GRB 050505, early TAROT observation
  90. GRB050509c (=H3751): An X-Ray Flash Localized By HETE
  91. GRB 050509b: Further Analysis of Keck LRIS Images
  92. GRB050509c: REM NIR and Optical observations
  93. GRB 050509b: Physical Properties of the Candidate Host galaxy
  94. GRB 050505: SARA Observations
  95. Swift UVOT Follow-up Observations of GRB 050509B
  96. GRB 050509B, Optical Observations
  97. GRB 050509B: Swift/XRT refined analysis
  98. GRB 050509b: Optical observations
  99. GRB 050509b: Precision Astrometry
  100. GRB 050509b: Possible Optical Counterpart

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