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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"

27029 results found.

  1. GRB 981226 optical observations
  2. radio observations of GRB 981226
  3. GRB981220 B, R and I band observations
  4. Optical Observations of GRB981226
  5. GRB 981220:Optical Observations
  6. GRB981226, BeppoSAX Christmas GRB
  7. GRB 981226 - Infrared Observations
  8. GRB 981220, radio observations
  9. GRB 981220, radio observations
  10. GRB981220 I-band Observations
  11. GRB981220 Optical Observations
  12. GRB 980326/Host Galaxy
  13. GRB981220 IPN error box
  14. GRB 981220: RXTE/ASM and BeppoSAX/GRBM results
  15. BeppoSAX NFI Observation of GRB980425
  16. GRB980329 R,I flux calibration and R,I,K upper limits
  17. GRB980425 Optical Follow-up
  18. GRB980425: X-ray revised positions
  19. GRB 980923 BATSE Observations
  20. SGR1900+14, BeppoSAX-GRBM observations
  21. GRB980703 Very Long Baseline Interferometry
  22. GRB970508 optical observations
  23. GRB971214, association with a Galactic star?
  24. Optical Observations of the Host Galaxy of GRB 980519
  25. GRB980519, Optical Observations
  26. GRB980703, Host galaxy multicolor photometry
  27. GRB 980703 (NFI observations)
  28. GRB980703 optical photometry
  29. GRB 980703: BATSE Observations
  30. GRB980703 optical observations
  31. GRB980703: Radio transient
  32. GRB980703 H-band Observations
  33. RXTE Observation of GRB 980706
  34. GRB980703 Transient Optical Follow-Up
  35. GRB980703 (I band observations)
  36. GRB980703 (optical R observations)
  37. GRB980703: radio source/optical transient
  38. BeppoSAX NFI observations of GRB 980703
  39. GRB 980703: ASM Position & Intensity
  40. GRB980703
  41. GRB980703 optical followup
  42. Radio observations of SGRs
  43. SGR1900+14 field optical observations
  44. GRB 980613 Near-IR observations
  45. GRB980613, optical observations
  46. GRB 980613: Optical transient and its host galaxy
  47. SGR1627-41, RXTE/ASM observations
  48. SGR1627-41, Refined IPN annulus location
  49. GRB 980613: Detection of the probable host galaxy
  50. GRB 980613: BATSE Observations
  51. SGR1627-41, BeppoSAX-GRBM detections
  52. SGR 1627-41
  53. GRB 980613 Optical Observations
  54. Discovery of a new SGR source, SGR1627-41
  55. GRB980613 Optical Observations
  56. GRB980613 observations from Palomar
  57. GRB980613 BeppoSAX-NFI follow up
  58. GRB980613 Near Infra-Red Observations
  59. GRB980613, BeppoSAX WFC positions
  60. SGR 1900+14
  61. SGR1900+14
  62. SGR1900+14
  63. BATSE on-board GRB trigger change
  64. GRB 980519 Optical Observations
  65. GRB980519 optical observations
  66. GRB980519 I-band observations
  67. GRB 980519
  68. GRB980519 BATSE Observations
  69. GRB970519, optical follow-up at Schmidt Calern
  70. GRB980519 optical observations
  71. GRB980519 Optical Observations
  72. GRB980519 IPN POSITION
  73. GRB 980519 Optical Observations
  74. GRB980519 optical observations
  75. GRB980515, BeppoSAX IAUC to be submitted
  76. BATSE on-board GRB trigger change
  77. GRB980519, BeppoSAX-WFC updated position
  78. GRB980519, BeppoSAX-WFC position
  79. BeppoSAX GRB ALERT: updated position of grb980515
  80. GRB 980425 Brightness Temperature
  81. BSAX Observations of GRB980425 field
  82. IPN web site of GRBs
  83. GRB980425 BATSE observations
  84. SAX J0840.7+2248 Optical Observations
  85. GRB 980425 optical observations
  86. GRB980425: optical obs.
  87. GRB980425: Radio Observations
  88. GRB 980425 optical observations
  89. report on BSAX observations of GRB980425
  90. GRB 980425 optical observations
  91. GRB 980329 ROSAT observation
  92. GRB980326 X-ray Observations
  93. GRB980326, optical observations
  94. GRB980326, optical observations
  95. GRB980329, Fading IR counterpart to radio source
  96. GRB980326 IPN annulus
  97. GRB980329
  98. GRB980329 Keck K-band observations
  99. GRB980329 sub-millimeter observations
  100. GRB980329 IPN annulus

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