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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"

32722 results found.

  1. GRB050824: MASTER:OT decay
  2. GRB050824: MASTER observation OT
  3. GRB050805a: MASTER optical candidat
  4. GRB 050824: ROTSE-III Optical Limits
  5. GRB050820A: RTT150 optical observations
  6. GRB050820a: PROMPT RcIc Observations
  7. GRB050815: Maidanak optical observation
  8. XRF050509c: Radio upper limits from GMRT
  9. VLT/UVES spectroscopy of GRB050820
  10. GRB050822: Swift/UVOT upper limits
  11. GRB 050820A BAT observations of second, larger episode of emission
  12. GRB050813: Maidanak I-band observations
  13. GRB 050822: Swift-BAT refined analysis
  14. GRB050820A: RTT150 optical observations
  15. GRB 050820a - corrections to GCN 3846
  16. Swift/UVOT UV Photometry of GRB 050820B
  17. GRB 050822: ROTSE-III Prompt Optical Limits
  18. Correction to Eiso calculation in GCN 3835 on GRB 050820A
  19. GRB050820A: Radio Observation
  20. GRB050825a - very long GRB like GRB041219a? (Konus-Wind observation)
  21. GRB050820a BVRcIc field photometry
  22. GRB 050820a: NIR Observations by WIRO
  23. GRB 050820B: Swift XRT position
  24. GRB050820B: Refined analysis of the Swift-BAT burst
  25. Swift/UVOT photometry of GRB050820
  26. GRB050820: refined XRT analysis
  27. GRB 050820: Early RAPTOR detections
  28. GRB 050820 Swift-BAT refined analysis
  29. GRB 050820: P60 Temporal Decay Index
  30. GRB 050820: High Resolution Spectroscopy from Keck
  31. GRB050819: refined XRT analysis
  32. GRB050819: RTT150 optical observations
  33. GRB 050820: Swift detection of a GRB
  34. GRB 050819 Swift-BAT refined analysis
  35. GRB050819: Swift XRT position
  36. Swift-BAT trigger 150993 is not a GRB
  37. Swift Trigger 150823 is HETE J1900.1-2455
  38. GRB 050817: Optical observations
  39. GRB 050815: Radio Observation
  40. GRB050814: Radio Observation
  41. GRB050817: Negative Optical Observations
  42. GRB 050814: continued fading
  43. GRB050815: XRT refined analysis
  44. GRB 050813: Radio Observations
  45. GRB050815: Refined analysis of the Swift-BAT burst
  46. GRB 050815: ROTSE-III Optical Limits
  47. GRB050815: Swift XRT afterglow localization
  48. GRB 050730: Third Epoch WSRT Radio Observations
  49. GRB050814: Fading red source
  50. GRB 050813: Gemini Spectra Revisited
  51. GRB050814: P60 Optical Afterglow Candidate
  52. GRB 050813: Non-fading of afterglow candidate
  53. GRB 050814: XRT refined analysis
  54. GRB050814: SWIFT/UVOT observation
  55. GRB050814: Refined analysis of the Swift-BAT burst
  56. GRB050813: Gemini Imaging
  57. GRB 050813: Gemini spectroscopy and redshifts of galaxies B and C
  58. GRB 050814: Swift XRT Afterglow Localization
  59. GRB 050814: Swift detection of a burst
  60. GRB 050813: Magellan detection of a high redshift galaxy cluster
  61. GRB050813: RTT150 optical observations
  62. GRB 050813: I-band observations
  63. GRB050813, SDSS pre-burst observations
  64. GRB 050813: KAIT optical limit
  65. GRB 050813: Swift-BAT refined analysis
  66. GRB 050813: Photometry of object in XRT error circle
  67. GRB050813: SWIFT/UVOT observation
  68. GRB 050813: Swift XRT afterglow localization
  69. RBO GRB 050714A and GRB 050716 observations
  70. Swift-BAT trigger 150131 is not a GRB
  71. GRB050807(=H3889): An X-Ray Rich GRB Localized by HETE
  72. GRB050803: CrAO optical observations, no OT candidate
  73. GRB 050730: WSRT Radio Observations
  74. GRB 050803: PROMPT BVRcIc Observations
  75. GRB 050807: ROTSE-III Optical Limits
  76. GRB 050730, optical observation
  77. GRB050805a : Null detection report
  78. GRB050730, optical observations
  79. GRB050803, optical observations
  80. GRB 050805b: TAROT optical limits
  81. GRB050802: TNG optical observations
  82. GRB050803: Radio Observation
  83. GRB 050803: RTT150 optical observations
  84. GRB050801: Radio Observation
  85. GRB050730: Radio Detection
  86. GRB050803: CrAO optical observations, possible OT candidate
  87. GRB050803: Optical/UV Upper Limits from Swift-UVOT
  88. GRB 050803: Keck Observations
  89. GRB 050803: Swift-BAT refined analysis
  90. GRB 050802.422: Fading of the afterglow and detection of the host
  91. GRB050803: MASTER further analys
  92. GRB 050803, optical observations
  93. GRB 050803: Magellan Observations
  94. GRB 050803: early Swift XRT analysis results
  95. GRB050802: Tentative absorption redshift
  96. GCN GRB observation 050713A
  97. GRB050730: FORS1 and UVES/VLT low- and high-resolution spectroscopy
  98. GRB 050802: Swift/UVOT optical and UV detections
  99. GRB050802: CrAO optical observations
  100. GRB050801: Unchanged decay slope

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