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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"

32693 results found.

  1. GRB030425: CrAO optical observation
  2. GRB 030329 Oprical observations in Rozhen observatory
  3. GRB 030324: Radio Observations
  4. GRB030329 observed as a sudden ionospheric disturbance (SID)
  5. GRB030329, SPM optical observations
  6. GRB 030329, the review of the sky area in plate archive (1950-1998)
  7. GRB 030329: Spectral Evolution of SN 2003dh
  8. GRB 030329: optical spectropolarimetry at VLT
  9. GRB030329: optical polarization
  10. GRB030329, optical observation
  11. GRB030329: 444 AAVSO Measurements
  12. ROTSE-III prompt optical detections of GRB 030418
  13. GRB030418: Upper limits from recent and historical observations.
  14. GRB 030418: Optical afterglow
  15. GRB 030418: Finder for afterglow candidate
  16. GRB 030329 OT position
  17. GRB030329: Optical Observations
  18. OT GRB 030329: early UBVRcIc spectral evolution
  19. GRB030329, UBVRI polarimetry, R-polarization
  20. GRB 030329: SARA Optical Observations
  21. OT GRB 030329: early spectrum
  22. GRB030329: VR Photometry at TNG
  23. GRB030324: Candidate Optical Afterglow
  24. GRB 030413: Optical Observations
  25. GRB 030329 Rc observations
  26. Superluminal motion in GRB 030329 (Correction)
  27. Superluminal motion in GRB 030329
  28. GRB 030329 and SN 2003dh
  29. GRB030329, optical position
  30. GRB 030329 VLBA Observations
  31. GRB 030329: BVRI photometry at Asiago
  32. GRB 030329, light curve flattens
  33. GRB 030329: VLT V-band photometry
  34. If the SN/GRB connection confirmed
  35. GRB 030329: Supernova Confirmed
  36. GRB030329: RTT150 optical observations
  37. GRB030329: Near Infrared Observations at Gunma
  38. GRB030329: HET spectroscopic monitoring
  39. GRB 030329, color evolution
  40. GRB030328, UBVRcIc field photometry
  41. GRB030329: Optical observcations
  42. GRB030329: BV photographic observations
  43. GRB 030329 Optical observations
  44. GRB 030329, color evolution
  45. GRB 030329: possible color change
  46. GRB030329: RTT150 optical observations
  47. GRB 030329: Supernova Spectrum Emerging
  48. GRB030329: RTT150 optical observation
  49. GRB030329: More AAVSO VR obs
  50. GRB030328: R upper limit after 6 hours by MASTER
  51. GRB 030329: BV photographic observations
  52. GRB 030329: SARA Optical Observations
  53. GRB 030329: SARA Optical Observations
  54. GRB030329, fading resumes
  55. GRB 030329, BVRI photometry
  56. GRB030329: Optical observations
  57. SDSS 0.5m PT observations of GRB030329 (correction)
  58. SDSS 0.5m PT observations of GRB030329
  59. GRB 030329, Optical observations
  60. GRB 030329, nearby galaxies
  61. GRB030329, cessation of fading
  62. GRB030329: final R-band light curve by MASTER
  63. GRB030329 Radio 23/43/90 GHz observations at Nobeyama
  64. GRB 030329: Sub-millimeter detection
  65. GRB 030329: SARA Optical Observations
  66. GRB 030329: SARA Optical Observations
  67. OT GRB light curves and SN predictions
  68. GRB030329, optical observation
  69. GRB030329, optical observation
  70. GRB030329, new UBVRcIc field photometry
  71. GRB 030329, light curve and SN prediction
  72. GRB030329: optical observations at Tokyo Tech
  73. GRB 030329: optical observations
  74. GRB030329: multiple re-brightening phases
  75. GRB 030329, BRI photometry
  76. GRB030329: Optical observations at Teramo
  77. GRB030329: more 15GHz observations
  78. Further AAVSO V,B,R observations of GRB030329
  79. GRB 030329: Additional Mt. Laguna Optical Observations
  80. GRB 030329: SARA Optical Observations
  81. GRB 030329: Observations with ANDICAM
  82. GRB030329: Optical observations
  83. GRB 030329: Correction to GCN 2056
  84. GRB 030329: fitting parameters and re-brightening
  85. GRB 030329: KAIT optical photometry
  86. GRB030329 Further RBO Optical Observations
  87. triangulation of GRB 030331 (single error box)
  88. GRB030329 - OT rebrightens
  89. GRB 030329: SARA Optical Observations
  90. AAVSO V & R observations of GRB030329
  91. GRB 030329: optical observations
  92. IPN triangulation of GRB030329b (large error box)
  93. GRB 030329: beginning of the new fading phase in optical band
  94. GRB 030329, optical spectroscopy
  95. GRB 030329: fading X-ray afterglow with RXTE
  96. GRB 030329: optical photometry
  97. GRB030329: Optical observations
  98. Photometry of GRB030329 - Constant OT Magnitude
  99. GRB 030329, R-band light curve
  100. GRB 030329: further optical observations

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