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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"

41696 results found.

  1. Spectroscopic Redshift of GRB 000926
  2. GRB000926, radio observations
  3. GRB 000926: Optical candidate
  4. Optical candidate for GRB000926
  5. GRB 000911, BVRI field photometry
  6. GRB000911: Corrected coordinates
  7. GRB000911: Sub-millimeter observations
  8. GRB000911: Optical Transient
  9. GRB000911, Radio and Optical observations
  10. GRB000911, Radio observations
  11. GRB000911: Optical observations
  12. False GRB alarm from RXTE/ASM on 8 Sept 2000
  13. GRB 000830: Optical observations
  14. GRB000830: Optical observations
  15. GRB000830, TNG B-band observations
  16. GRB000830, BVRI field photometry
  17. GRB000830: Optical observations
  18. GRB000210, Optical observations
  19. Chandra Position of GRB000210
  20. "Snapshot" afterglow IDs and GRB 000830
  21. GRB000830: Optical observations
  22. IPN triangulation of GRB000830
  23. HST/STIS observations of the host galaxy of GRB 980329
  24. HST/STIS observations of the chaotic environment of GRB 980613
  25. SGR 1806-20 burst activity
  26. GRB000812, TNG R-band observations
  27. GRB000801 & GRB000730, Gamma Ray Observations
  28. GRB000730, Gamma Ray Observations
  29. GRB000812, Radio observations
  30. GRB000801, Gamma Ray Observations
  31. GRB000801, VLT-Antu R-band observations
  32. GRB000301C, UBVI optical observations
  33. GRB000801, Radio Observations
  34. GRB 991208 Host Galaxy Imaging
  35. GRB 990510: Possible detection of a host galaxy
  36. GRB 990510 Host Galaxy Discovery
  37. GRB 000727, optical observations
  38. GRB 990705, HST/STIS observations of the host galaxy
  39. GRB 990712: Late time HST/STIS Observations
  40. GRB 991216, HST/STIS observations
  41. GRB000620, Radio Observations
  42. GRB981226, HST/STIS observations of the host galaxy
  43. GRB000630, optical observations
  44. GRB 000630: Detection of the Optical Afterglow
  45. GRB000630, Revised BVRI Field Photometry
  46. GRB000630, Optical Observations
  47. GRB000630, optical observations
  48. GRB000630, optical observations
  49. GRB000630, BVRI Field Photometry
  50. GRB000630, optical observations
  51. GRB000630, optical observations
  52. GRB000630: Optical observations
  53. GRB000630, Radio Observations
  54. possible optical counterpart of GRB 000630
  55. GRB 000623, optical observations
  56. GRB 000620, optical observations
  57. GRB000418, HST/STIS Observations
  58. GRB990123: Late-time HST/STIS observations of the host
  59. GRB 990506, HST/STIS Observations of the Host Galaxy
  60. GRB 000620: J-band observations
  61. GRB000620, optical observations
  62. GRB000615: H-band observations
  63. GRB990308, HST/STIS observations of the host galaxy
  64. GRB000620 - Optical observations
  65. GRB000620 Optical observations
  66. IPN annulus for GRB000620
  67. GRB000620: BeppoSAX WFC and GRBM detection
  68. GRB000615, Radio observations
  69. GRB000607, optical observations
  70. GRB 000615: NIR further observations
  71. GRB990123, HST/STIS observations of the host galaxy
  72. GRB000616 optical observations
  73. GRB 000615, near-infrared observations
  74. GRB 990123: Late-time HST/STIS 50CCD observations of the host
  75. GRB000615, further R-band photometry
  76. GRB 000615: NIR observations
  77. GRB000615: BeppoSAX NFI follow-up preliminary analysis
  78. GRB000615, R-band photometry
  79. GRB980425, HST/STIS observations of the host galaxy
  80. GRB000615: BeppoSAX GRB Alert
  81. The Hosts of GRB 980703 and GRB 971214
  82. GRB 000301C: Further Late-Time HST/STIS observations
  83. GRB000528: follow-up X-ray measurements and update of IPN annulus
  84. Optical Follow-up of GRB000529 Error Box
  85. GRB980519, HST/STIS observations of the host galaxy
  86. GRB000607, Radio Observations
  87. BeppoSAX X-ray transient/possible GRB000608
  88. GRB000604 optical non-detection
  89. GRB000604 - Optical observations
  90. GRB000604, optical observations
  91. GRB000528, optical observations at ESO
  92. GRB 000604 optical observations
  93. GRB 000418: Detection of the Host Galaxy
  94. GRB000604, optical observations, comparison with DPOSS
  95. GRB000528, Radio Observations
  96. X-ray Afterglow of GRB 000529
  97. GRB000529: BeppoSAX NFI follow-up preliminary analysis
  98. GRB000528: BeppoSAX NFI follow-up preliminary analysis
  99. GRB000529: Optical Observations
  100. IPN localization and time history of GRB000528

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