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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"

39265 results found.

  1. GRB030418: Kiso near infrared observations
  2. GRB 030418: Optical afterglow
  3. GRB 030418: Finder for afterglow candidate
  4. GRB 030418: Optical afterglow candidate
  5. GRB 030329 OT position
  6. OT GRB 030329: early UBVRcIc spectral evolution
  7. GRB030329, UBVRI polarimetry, R-polarization
  8. GRB 030329: SARA Optical Observations
  9. OT GRB 030329: early spectrum
  10. GRB030329: VR Photometry at TNG
  11. GRB030324: Candidate Optical Afterglow (Erratum)
  12. GRB030324: Candidate Optical Afterglow
  13. IPN triangulation of GRB030414 (small error box)
  14. GRB 030413: Optical Observations
  15. GRB 030329 Rc observations
  16. IPN triangulation of GRB030413 (small error box)
  17. IPN triangulation of GRB030410 (annulus)
  18. Superluminal motion in GRB 030329 (Correction)
  19. Superluminal motion in GRB 030329
  20. GRB 030329 and SN 2003dh
  21. GRB030329, optical position
  22. GRB 030329 VLBA Observations
  23. IPN triangulation of GRB030406 (small error box)
  24. IPN triangulation of GRB050403 (small error box)
  25. IPN triangulation of GRB030403 (annulus)
  26. GRB 030329: BVRI photometry at Asiago
  27. GRB 030329, light curve flattens
  28. GRB 030329: VLT V-band photometry
  29. If the SN/GRB connection confirmed
  30. GRB 030329: Supernova Confirmed
  31. GRB030329: RTT150 optical observations
  32. GRB030329: Near Infrared Observations at Gunma
  33. GRB030329: HET spectroscopic monitoring
  34. Kiso observation of the GRB030329 at April 6
  35. GRB 030329, color evolution
  36. GRB030328, UBVRcIc field photometry
  37. GRB 030329 Optical observations
  38. GRB 030329, color evolution
  39. GRB 030329: possible color change
  40. GRB030329: RTT150 optical observations
  41. GRB 030329: Supernova Spectrum Emerging
  42. GRB030329: Kiso B and R band observations
  43. GRB030329: RTT150 optical observation
  44. GRB030329: More AAVSO VR obs
  45. GRB030328: R upper limit after 6 hours by MASTER
  46. GRB 030329: BV photographic observations
  47. GRB 030329: SARA Optical Observations
  48. GRB 030329: SARA Optical Observations
  49. GRB030329, fading resumes
  50. GRB 030329, BVRI photometry
  51. SDSS 0.5m PT observations of GRB030329 (correction)
  52. SDSS 0.5m PT observations of GRB030329
  53. GRB 030329, Optical observations
  54. GRB 030329, nearby galaxies
  55. GRB030329, cessation of fading
  56. GRB030329 Radio 23/43/90 GHz observations at Nobeyama
  57. GRB 030329: Sub-millimeter detection
  58. GRB 030329: SARA Optical Observations
  59. GRB 030329: SARA Optical Observations
  60. OT GRB light curves and SN predictions
  61. GRB030329, optical observation
  62. GRB030329, new UBVRcIc field photometry
  63. GRB 030329, light curve and SN prediction
  64. GRB030329: optical observations at Tokyo Tech
  65. GRB 030329: optical observations
  66. GRB030329: multiple re-brightening phases
  67. GRB 030329, BRI photometry
  68. GRB 030329 , SPM optical observations
  69. GRB 030329: Radio observations at GMRT
  70. Further AAVSO V,B,R observations of GRB030329
  71. GRB 030329: Additional Mt. Laguna Optical Observations
  72. GRB 030329: SARA Optical Observations
  73. GRB 030329: Observations with ANDICAM
  74. GRB030329: further optical photometry and evidence for a light curve discontinuity
  75. GRB 030329: Correction to GCN 2056
  76. GRB 030329: fitting parameters and re-brightening
  77. GRB 030329: KAIT optical photometry
  78. GRB030329 Further RBO Optical Observations
  79. triangulation of GRB 030331 (single error box)
  80. GRB030329 - OT rebrightens
  81. GRB 030329: SARA Optical Observations
  82. AAVSO V & R observations of GRB030329
  83. IPN triangulation of GRB030331 (annulus)
  84. GRB 030329: optical observations
  85. IPN triangulation of GRB030329b (large error box)
  86. GRB 030329: beginning of the new fading phase in optical band
  87. GRB 030329, optical spectroscopy
  88. GRB 030329: fading X-ray afterglow with RXTE
  89. GRB 030329: optical photometry
  90. Photometry of GRB030329 - Constant OT Magnitude
  91. GRB 030329, R-band observations
  92. GRB 030329, R-band light curve
  93. GRB 030329: further optical observations
  94. GRB030329 - OT brightens
  95. GRB 030329: OT observations at Kanazawa
  96. GRB030329 15 GHz radio observation
  97. GRB 030329 RBO V Optical Observations
  98. GRB 030329, optical photometry
  99. GRB030329: Near Infrared Observations
  100. 030331 NOT A GRB

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