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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"

27032 results found.

  1. GRB010222: Optical Observations
  2. GRB010222, radio observations
  3. GRB010222, optical observations
  4. GRB010222: BeppoSAX/NFI Observations
  5. Redshift of the Optical Transient of GRB010222
  6. GRB010214B,Gamma Ray Observations
  7. GRB010222
  8. ALERT: GRB010222: the brightest GRB observed by BeppoSAX
  9. GRB010220, Radio and Optical Observations
  10. GRB 010220, simultaneous optical observations
  11. GRB010220: BeppoSAX WFC and GRBM preliminary data
  12. GRB010214, optical observations
  13. BeppoSAX ALERT: GRB010220
  14. GRB010214: BeppoSAX WFC and GRBM preliminary data
  15. GRB 010214: X-Ray afterglow
  16. GRB 010214, Optical Observations
  17. J-Band Observation of GRB 010214.
  18. GRB010214, Radio Observations
  19. GRB010214, optical observations
  20. GRB010213, optical observations
  21. Possible InfraRed Transient of GRB 010214.
  22. GRB010214 Optical Observation
  23. GRB010214: BeppoSAX/NFI Observations
  24. GRB010213 detected by HETE
  25. BeppoSAX ALERT: GRB010214
  26. IPN Status Report
  27. HETE Status
  28. GRB010126, TNG R-band observations
  29. GRB010126 Optical Observations
  30. Optical Observations of GRB 001018 at Keck
  31. Optical observations of GRB 001018 with JCAM
  32. GRB 001212 Optical Observation
  33. GRB 001212 optical observation
  34. GRB001204: Optical observations
  35. IPN triangulation of GRB001204 (short/hard)
  36. GRB001120: Gunn-i observations
  37. GRB001120: Optical observations
  38. Optical/NIR observations of GRB001109
  39. GRB 001109: deep JHK upper limits
  40. GRB 001109 X-ray afterglow with BeppoSAX
  41. CORRECTION to XMM-Newton observation of GRB001025
  42. GRB001109: BeppoSAX/NFI Observations
  43. GRB001109, Radio observations
  44. BeppoSAX ALERT: GRB001109
  45. GRB001105, BVRI field photometry
  46. GRB 991208: HST Imaging of the Host Galaxy
  47. GRB000926: R-image of the host galaxy
  48. XMM-Newton observation of GRB001025
  49. GRB 001025A, optical observation
  50. IPN TRIANGULATION OF GRB001025B (SHORT/HARD)
  51. ASM Localization of GRB 001025
  52. GRB 001018, Possible Radio Afterglow
  53. GRB001018, Gamma Ray Observations
  54. The Likely Optical/Infrared Afterglow of GRB 001011
  55. BeppoSAX ALERT: GRB001011
  56. GRB 001007, BVR-band observations
  57. GRB000926 - Amateur Optical Observations
  58. GRB001007: Optical observations
  59. GRB 000926 : the host galaxy
  60. GRB 000926 Chandra Observation
  61. Public availability of BeppoSAX data of GRB000926
  62. GRB000926: X-ray afterglow by BeppoSAX: revised fluxes (fwd)
  63. GRB000926: X-ray afterglow by BeppoSAX. Refined analysis
  64. GRB 000926: optical observations
  65. GRB000911: optical VLT observations
  66. GRB000926 K'-band Observation
  67. GRB000926 : increasing optical decay slope
  68. J and K band observations of GRB 000926
  69. GRB000911 Optical Observations
  70. GRB000926: X-ray afterglow by BeppoSAX & plan of BSAX & Chandra obs.
  71. GRB000926: Optical observations
  72. CONCAM crude optical limits before and after GRB000926
  73. GRB 000926 HST/Chandra TOO Status
  74. GRB 000926: Optical candidate
  75. Optical candidate for GRB000926
  76. GRB 000911, BVRI field photometry
  77. GRB000911: Sub-millimeter observations
  78. GRB000911: Optical Transient
  79. GRB000911, Radio observations
  80. False GRB alarm from RXTE/ASM on 8 Sept 2000
  81. GRB000830, TNG B-band observations
  82. GRB000210, Optical observations
  83. Chandra Position of GRB000210
  84. HST/STIS observations of the host galaxy of GRB 980329
  85. HST/STIS observations of the chaotic environment of GRB 980613
  86. SGR 1806-20 burst activity
  87. GRB000801 & GRB000730, Gamma Ray Observations
  88. GRB000730, Gamma Ray Observations
  89. GRB000812, Radio observations
  90. GRB000801, Gamma Ray Observations
  91. GRB 991208 Host Galaxy Imaging
  92. GRB 990510: Possible detection of a host galaxy
  93. GRB 990510 Host Galaxy Discovery
  94. IPN localization of GRB000727
  95. GRB 990705, HST/STIS observations of the host galaxy
  96. GRB 990712: Late time HST/STIS Observations
  97. GRB 991216, HST/STIS observations
  98. GRB981226, HST/STIS observations of the host galaxy
  99. GRB 000630: Detection of the Optical Afterglow
  100. GRB000630, optical observations

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