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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"

42919 results found.

  1. MASTER:optical observations GRB030416
  2. ROTSE-III prompt optical detections of GRB 030418
  3. GRB030418: Upper limits from recent and historical observations.
  4. GRB030418: Kiso near infrared observations
  5. GRB 030418: Optical afterglow
  6. GRB 030418: Finder for afterglow candidate
  7. GRB 030418: Optical afterglow candidate
  8. GRB 030329 OT position
  9. GRB030329: Optical Observations
  10. OT GRB 030329: early UBVRcIc spectral evolution
  11. GRB030329, UBVRI polarimetry, R-polarization
  12. GRB 030329: SARA Optical Observations
  13. OT GRB 030329: early spectrum
  14. GRB030329: VR Photometry at TNG
  15. GRB030324: Candidate Optical Afterglow (Erratum)
  16. GRB030324: Candidate Optical Afterglow
  17. IPN triangulation of GRB030414 (small error box)
  18. GRB 030413: Optical Observations
  19. GRB 030329 Rc observations
  20. IPN triangulation of GRB030413 (small error box)
  21. IPN triangulation of GRB030410 (annulus)
  22. Superluminal motion in GRB 030329 (Correction)
  23. Superluminal motion in GRB 030329
  24. GRB 030329 and SN 2003dh
  25. GRB030329, optical position
  26. GRB 030329 VLBA Observations
  27. IPN triangulation of GRB030406 (small error box)
  28. IPN triangulation of GRB050403 (small error box)
  29. IPN triangulation of GRB030403 (annulus)
  30. GRB 030329, light curve flattens
  31. GRB 030329: VLT V-band photometry
  32. If the SN/GRB connection confirmed
  33. GRB 030329: Supernova Confirmed
  34. GRB030329: RTT150 optical observations
  35. GRB030329: Near Infrared Observations at Gunma
  36. GRB030329: HET spectroscopic monitoring
  37. Kiso observation of the GRB030329 at April 6
  38. GRB 030329, color evolution
  39. GRB030328, UBVRcIc field photometry
  40. GRB030329: Optical observcations
  41. GRB030329: BV photographic observations
  42. GRB 030329 Optical observations
  43. GRB 030329, color evolution
  44. GRB 030329: possible color change
  45. GRB030329: RTT150 optical observations
  46. GRB 030329: Supernova Spectrum Emerging
  47. GRB030329: Kiso B and R band observations
  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. GRB030328: Full Observation, X-ray Fading and Spectrum Measured
  77. GRB 030329 , SPM optical observations
  78. GRB 030329: Radio observations at GMRT
  79. GRB030329: more 15GHz observations
  80. Further AAVSO V,B,R observations of GRB030329
  81. GRB 030329: Additional Mt. Laguna Optical Observations
  82. GRB 030329: SARA Optical Observations
  83. GRB 030329: Observations with ANDICAM
  84. GRB030329: Optical observations
  85. GRB030329: further optical photometry and evidence for a light curve discontinuity
  86. GRB 030329: Correction to GCN 2056
  87. GRB 030329: fitting parameters and re-brightening
  88. GRB 030329: KAIT optical photometry
  89. GRB030329 Further RBO Optical Observations
  90. triangulation of GRB 030331 (single error box)
  91. GRB030329 - OT rebrightens
  92. GRB 030329: SARA Optical Observations
  93. AAVSO V & R observations of GRB030329
  94. IPN triangulation of GRB030331 (annulus)
  95. GRB 030329: optical observations
  96. IPN triangulation of GRB030329b (large error box)
  97. GRB 030329: beginning of the new fading phase in optical band
  98. GRB 030329, optical spectroscopy
  99. GRB 030329: fading X-ray afterglow with RXTE
  100. GRB 030329: optical photometry

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