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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"

43678 results found.

  1. GRB 000301C: Optical Spectrum and Redshift
  2. GRB 000301C: Optical Spectrum and Redshift
  3. GRB 000301C: A Precise Redshift Determination
  4. GRB 000301C, Optical Observation
  5. GRB 000301C: HST/STIS-PRISM NUV-MAMA spectroscopy
  6. GRB 000301C: HST/STIS CCD Imaging of the field
  7. IPN error box for GRB000307
  8. GRB 000301c: K' observations
  9. GRB000301C, optical R-band observations
  10. GRB000301c - R photometry and nearby faint source confirmation
  11. GRB 000301C, Optical Observation
  12. GRB 000301c: K' observations
  13. GRB 000301C Optical Observations
  14. GRB 000301C: K' Observations
  15. GRB000301C OT candidate optical observations
  16. GRB000301C - Host galaxy not detected in R (?)
  17. Optical observations of GRB000301c
  18. GRB000301C, Radio observations
  19. GRB000301C, Radio observations
  20. GRB000301C optical observations
  21. GRB000301C, near-infrared observations (JHK' imaging)
  22. GRB 000301c near-IR observations
  23. GRB 000301C, Optical Color
  24. GRB000301C, Optical Spectroscopy
  25. GRB 000301C, UBVRI field photometry
  26. GRB 000301C, Optical Observation
  27. GRB000301C, optical observations
  28. GRB000301C 250 GHz detection
  29. GRB 000301C R-band observation
  30. GRB 000301C, Optical Observation
  31. GRB000301C, near-infrared observations (JHK' photometry)
  32. GRB 000301C: OT confirmed
  33. GRB000301c optical observations
  34. GRB 000301A, Radio Observations
  35. GRB000301C, optical observations
  36. GRB000301c, near-infrared observations
  37. GRB000301C
  38. GRB 000301C : Optical Candidate
  39. Radio observations of the error box of GRB000301A
  40. GRB000301C: RXTE/ASM and IPN localizations
  41. GRB000226 [IPN Position]
  42. HST Observations of GRB 990712
  43. GRB 000214 near-IR observations
  44. GRB 000115 Optical observations
  45. GRB 000214, Radio Observations
  46. GRB 000214 ``Valentine's Day Burst'': BeppoSAX NFI Observation
  47. GRB000210, Radio Observations
  48. GRB 000115, BVRI field photometry
  49. GRB000214: BeppoSAX GRBM and WFC Detection
  50. IPN annulus for GRB000214
  51. Optical observations of GRB000210
  52. GRB000210 X-ray afterglow
  53. GRB000214: X-ray afterglow candidate
  54. GRB000214 refined BeppoSAX-WFC position
  55. BeppoSAX GRB000214 ("S. Valentine's day GRB")
  56. GRB 000210: BATSE Observations
  57. Correction to Chandra Position of GRB000210 afterglow
  58. Optical observations of the Chandra X-ray source for GRB000210
  59. GRB000210, Radio Observations
  60. Optical candidate for GRB000210
  61. Chandra Observations of GRB000210 X-ray Afterglow
  62. IPN triangulation of GRB000210
  63. GRB000210: possible afterglow detection with BeppoSAX NFI
  64. GRB000201, Radio Observations
  65. GRB000210: BeppoSAX GRBM and WFC Detection
  66. Optical observations of GRB000131
  67. GRB000201 Optical Observations
  68. GRB 000201: TAROT optical observations
  69. GRB 000131 Optical Observations
  70. GRB000126 Optical Observations
  71. BATSE GRB trigger criteria changed
  72. GRB 991208, radio observations
  73. BATSE+IPN location of GRB000131
  74. IPN localization of GRB000131
  75. GRB000126, optical observations
  76. BATSE location of GRB000126
  77. IPN localization of GRB000126
  78. GRB 000115 Optical observations
  79. BATSE Observations of GRB000115
  80. Correction to GCN 520 (IPN annulus for GRB000115)
  81. IPN annulus for GRB000115
  82. Second RXTE Observation of GRB 000115
  83. GRB991216, UBVRIJHK field photometry
  84. GRB991216 late optical observation
  85. GCN resumes full operations
  86. GRB 991216 VLBA Observations
  87. BEPPOSAX GRBM Localization of GRB991226
  88. IPN error boxes for GRB991229
  89. GRB 991216: J band spectrophotometry
  90. GRB 991216: Detection of the Host and/or Absorber Galaxy
  91. IPN localization of GRB991226
  92. Single IPN error box for GRB991221
  93. IPN error boxes for GRB991221
  94. GRB 991216 RXTE ASM Observations
  95. IPN error box for GRB991216
  96. Lowell/Perkins observation of GRB 991216
  97. GRB 991217 (SAX J2303.2+0015) Optical observations
  98. GRB991217/SAX J2303.2+0015, optical observations
  99. Chandra observation of the X-ray afterglow of GRB991216
  100. GRB 991216, optical observations

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