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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"

36208 results found.

  1. GRB001120: Optical observations
  2. GRB001109, optical observations
  3. GRB001120, optical observations
  4. IPN triangulation of GRB001120
  5. Optical/NIR observations of GRB001109
  6. GRB 001109: deep JHK upper limits
  7. GRB 001109 X-ray afterglow with BeppoSAX
  8. GRB001109: Optical observations
  9. GRB001109: BeppoSAX/NFI Observations
  10. GRB001109, R-band optical observations
  11. GRB001109, Radio observations
  12. BeppoSAX ALERT: GRB001109
  13. GRB001105 BVRI field photometry correction
  14. GRB001105, BVRI field photometry
  15. GRB 001105, R-band observation
  16. IPN TRIANGULATION OF GRB001105
  17. GRB 001025B, Optical obervations
  18. GRB 991208: HST Imaging of the Host Galaxy
  19. GRB000926: R-image of the host galaxy
  20. GRB 001025B, I-band observations
  21. GRB 001025 Optical Observations
  22. GRB 001025A, optical observation
  23. IPN TRIANGULATION OF GRB001025B (SHORT/HARD)
  24. IPN triangulation of GRB001025
  25. ASM Localization of GRB 001025
  26. GRB001007, Radio observations
  27. IPN TRIANGULATION OF GRB001020
  28. GRB001019, Optical Observations
  29. GRB 001018, Possible Radio Afterglow
  30. GRB001018, Gamma Ray Observations
  31. IPN TRIANGULATION OF GRB001019
  32. IPN TRIANGULATION OF GRB001018
  33. IPN TRIANGULATION OF GRB 001017
  34. GRB 000926: Improved Absorber Redshift
  35. V,R,I band observations of GRB000926
  36. The Likely Optical/Infrared Afterglow of GRB 001011
  37. HETE positions added to GCN
  38. BeppoSAX ALERT: GRB001011
  39. GRB 001007, BVR-band observations
  40. GRB000926 - Amateur Optical Observations
  41. CONCAM null result on GRB001005
  42. IPN triangulation of GRB001007
  43. GRB 000926 : the host galaxy
  44. IPN triangulation of GRB001005
  45. GRB 000926 Chandra Observation
  46. IPN triangulation of GRB 001004
  47. Public availability of BeppoSAX data of GRB000926
  48. GRB000926: X-ray afterglow by BeppoSAX. Refined analysis
  49. GRB 000926, Optical Decay
  50. GRB000911: VLT infrared observation
  51. GRB000926 - Optical observations
  52. GRB000926 - Optical observations
  53. GRB 000926: optical observations
  54. GRB 000926, Optical Observations
  55. GRB000911: optical VLT observations
  56. GRB000926 K'-band Observation
  57. GRB000926 : increasing optical decay slope
  58. GRB000926 optical observations
  59. GRB000926 - Optical observations
  60. Re: GRB 000926, optical observation by Oksanen (vsnet-grb)
  61. J and K band observations of GRB 000926
  62. GRB 000926: Lightcurve Update and Predictions
  63. GRB 000926, optical observation by Oksanen (vsnet-grb)
  64. GRB000926: X-ray afterglow by BeppoSAX & plan of BSAX & Chandra obs.
  65. CONCAM crude optical limits before and after GRB000926
  66. GRB 000926: Preliminary R-band Lightcurve
  67. GRB 000926 HST/Chandra TOO Status
  68. Spectroscopic Redshift of GRB 000926
  69. GRB 000926, Optical Observation
  70. GRB 000926: Optical candidate
  71. Optical candidate for GRB000926
  72. IPN triangulation of GRB000926
  73. GRB 000911, BVRI field photometry
  74. GRB000911: Sub-millimeter observations
  75. IPN triangulation of GRB000925
  76. IPN triangulation of GRB000911
  77. IPN triangulation of GRB000910
  78. False GRB alarm from RXTE/ASM on 8 Sept 2000
  79. GRB 000830: Optical observations
  80. GRB000830: Optical observations
  81. GRB000830, TNG B-band observations
  82. GRB000830, BVRI field photometry
  83. GRB000830: Optical observations
  84. GRB000210, Optical observations
  85. Chandra Position of GRB000210
  86. "Snapshot" afterglow IDs and GRB 000830
  87. IPN triangulation of GRB000830
  88. HST/STIS observations of the host galaxy of GRB 980329
  89. HST/STIS observations of the chaotic environment of GRB 980613
  90. IPN localization of GRB000820
  91. GRB000801 & GRB000730, Gamma Ray Observations
  92. GRB000730, Gamma Ray Observations
  93. GRB000812, Radio observations
  94. IPN localization of GRB000812
  95. IPN localization of GRB000811
  96. GRB000801, Gamma Ray Observations
  97. GRB000801, VLT-Antu R-band observations
  98. GRB 991208 Host Galaxy Imaging
  99. Updated IPN coordinates for GRB000801
  100. IPN localization of GRB000801

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