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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"

32551 results found.

  1. GRB 990123 Keck Spectrum update
  2. GRB990123 IPN annulus
  3. GRB 990123 : Multiple and Distorted Images of the Host Galaxy?
  4. GRB990123 Optical Observations
  5. GRB 990123 Spectroscopic Redshifts
  6. GRB 990123: New Optical Observations, Decay Measure
  7. GRB 990123 Optical Follow-Up
  8. GRB 990123: Possible Gravitationally Lensed Burst?
  9. GRB990123, optical observation
  10. GRB 990123 optical observations
  11. GRB 990123: Pre-Burst Detection of an Apparent Host Galaxy
  12. GRB 990123 radio observations
  13. GRB 990123, new radio source
  14. GRB990123, Optical observation
  15. GRB 990123: Optical Decay Slope
  16. GRB 990123 r-band photometry
  17. GRB 990123 Optical Follow-up
  18. GRB990123, early optical counterpart detection
  19. GRB990123 Optical Observation
  20. GRB 990123: Bright New Source, Possible Optical Transient
  21. GRB 990123, Radio observations
  22. SN 1999E & GRB 980919
  23. Optical Observations of GRB 981220
  24. GRB 981226: radio variable
  25. GRB981220
  26. GRB981220, Correction to GCN 179
  27. GRB981220, Optical Observations
  28. GRB 981220 Optical observations
  29. GRB 981226 Optical Observations
  30. GRB 980613: Spectroscopy of the host galaxy
  31. GRB981226, sub-millimeter observations
  32. GRB981220, sub-millimeter observations
  33. GRB 981220 and GRB 981226, optical observations
  34. GRB981226 Optical Observations
  35. GRB 981226 radio observations
  36. GRB 981226
  37. radio observations of GRB 981226
  38. GRB981220 B, R and I band observations
  39. Optical Observations of GRB981226
  40. GRB 981220:Optical Observations
  41. GRB 981220 optical R and I observations
  42. GRB981226, BeppoSAX Christmas GRB
  43. GRB 981226 - Infrared Observations
  44. GRB 981220
  45. GRB 981220, radio observations
  46. GRB 981220, radio observations
  47. GRB 981220: BeppoSAX/GRBM results
  48. GRB981220 I-band Observations
  49. GRB 981220
  50. GRB 981220 Optical Observations
  51. GRB 981220: RXTE/ASM and BeppoSAX/GRBM results
  52. BeppoSAX NFI Observation of GRB980425
  53. GRB980425 Optical Follow-up
  54. GRB980425: X-ray revised positions
  55. GRB980703 Very Long Baseline Interferometry
  56. GRB970508 optical observations
  57. Optical Observations of the Host Galaxy of GRB 980519
  58. GRB980519, Optical Observations
  59. GRB980703, Host galaxy multicolor photometry
  60. GRB 980703 (NFI observations)
  61. GRB980703 optical photometry
  62. GRB 980703: BATSE Observations
  63. GRB980703 optical observations
  64. GRB980703: Radio transient
  65. GRB980703 H-band Observations
  66. GRB 980703: Spectrum of the proposed optical counterpart
  67. RXTE Observation of GRB 980706
  68. GRB980703: Spectrum of the proposed optical counterpart
  69. GRB980703 Transient Optical Follow-Up
  70. GRB980703: LOTIS observation at early times
  71. GRB980613 Optical Observations
  72. GRB 980703
  73. GRB980703 (I band observations)
  74. GRB 980703 H-band Observations
  75. GRB980703: radio source/optical transient
  76. BeppoSAX NFI observations of GRB 980703
  77. GRB980519 observation report
  78. Radio observations of SGRs
  79. GRB 980613 Near-IR observations
  80. GRB980613, optical observations
  81. GRB 980613: Optical transient and its host galaxy
  82. SGR1627-41, RXTE/ASM observations
  83. SGR1627-41, Refined IPN annulus location
  84. GRB 980613: Detection of the probable host galaxy
  85. Reduced error box of SGR 1627-41
  86. SGR1627-41, BeppoSAX-GRBM detections
  87. GRB 980613 Optical Observations
  88. GRB 980613 optical observations
  89. GRB980613 Optical Observations
  90. GRB980613 observations from Palomar
  91. GRB 980613 new optical/IR observations
  92. GRB971214 Secondary Standards
  93. GRB980519 Secondary Standards
  94. SGR1900+14
  95. GRB 980519 Optical Observations
  96. GRB980519 optical observations
  97. GRB980519 I-band observations
  98. GRB 980519
  99. GRB980519 optical observations
  100. GRB 980519 Optical Observations

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