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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"

28240 results found.

  1. GRB 990123: BVRI standards in the field
  2. GRB981220, field photometry
  3. GRB990123, Optical observation
  4. GRB990123, 15-GHz limits
  5. GRB 990123: New Constraints on Possible Foreground Galaxies
  6. GRB990123 Optical Observations
  7. GRB990123, Probability of gravitational lensing
  8. GRB 990123: Detection of the IR Transient, and the Light Curve Fits
  9. GRB990123, Preliminary Lens Search Results
  10. On the Lensing Interpretation of GRB 990123
  11. Search for Potential Images of GRB 990123
  12. Search for Potential Images of GRB 990123
  13. GRB990123, Optical BVRI Observations
  14. GRB 990123: near-infrared observations.
  15. GRB990123, OSSE observations
  16. GRB990123: NIR Observation
  17. GRB990123, ASCA X-ray observation of afterglow
  18. "GRB 990123: New BV Observations"
  19. GRB 990123 Optical Follow-Up
  20. GRB 990123: BATSE Observations
  21. GRB990123 Optical Observations
  22. GRB 990123: New Optical Observations, Decay Measure
  23. GRB 990123 Optical Follow-Up
  24. GRB 990123: Possible Gravitationally Lensed Burst?
  25. GRB990123, optical observation
  26. GRB 990123: Pre-Burst Detection of an Apparent Host Galaxy
  27. GRB990123, Optical observation
  28. GRB 990123: Optical Decay Slope
  29. GRB 990123 r-band photometry
  30. GRB 990123 Optical Follow-up
  31. GRB990123, early optical counterpart detection
  32. GRB990123 Optical Observation
  33. Possible identification of SN1999E with GRB980910
  34. Optical Observations of GRB 981220
  35. GRB 981226: radio variable
  36. GRB981220
  37. GRB981220, Correction to GCN 179
  38. GRB 981220 Optical observations
  39. GRB 981226 Optical Observations
  40. GRB 981220 and GRB 981226, optical observations
  41. GRB981226 Optical Observations
  42. GRB981226 BeppoSAX follow up
  43. GRB 981226
  44. GRB 981226 optical observations
  45. GRB981220 B, R and I band observations
  46. Optical Observations of GRB981226
  47. GRB 981220:Optical Observations
  48. GRB 981226 optical observations
  49. GRB 981220
  50. GRB 981220, radio observations
  51. GRB981220 I-band Observations
  52. GRB 981220
  53. GRB 980326/Host Galaxy
  54. GRB 981220: RXTE/ASM and BeppoSAX/GRBM results
  55. BeppoSAX NFI Observation of GRB980425
  56. GRB980329 R,I flux calibration and R,I,K upper limits
  57. GRB980425 Optical Follow-up
  58. GRB 980923 BATSE Observations
  59. SGR1900+14, BeppoSAX-GRBM observations
  60. GRB970508 optical observations
  61. GRB971214, association with a Galactic star?
  62. GRB980519, Optical Observations
  63. GRB980703 - BeppoSAX/GRBM detection
  64. GRB980703 optical photometry
  65. GRB 980703: BATSE Observations
  66. GRB980703 optical observations
  67. GRB980703: Radio transient
  68. GRB 980703: Spectrum of the proposed optical counterpart
  69. GRB980703 Transient Optical Follow-Up
  70. GRB980703: LOTIS observation at early times
  71. GRB980613 Optical Observations
  72. GRB980703 (I band observations)
  73. BeppoSAX NFI observations of GRB 980703
  74. GRB980519 observation report
  75. GRB980703 optical followup
  76. Radio observations of SGRs
  77. SGR1900+14 field optical observations
  78. GRB980613, optical observations
  79. GRB 980613: Optical transient and its host galaxy
  80. SGR1627-41, RXTE/ASM observations
  81. GRB 980613: Detection of the probable host galaxy
  82. Reduced error box of SGR 1627-41
  83. GRB 980613: BATSE Observations
  84. GRB 980613 Optical Observations
  85. GRB 980613 optical observations
  86. Discovery of a new SGR source, SGR1627-41
  87. GRB980613 Optical Observations
  88. GRB980613 observations from Palomar
  89. GRB 980613 optical/IR obs.
  90. GRB980613 Near Infra-Red Observations
  91. GRB971214 Secondary Standards
  92. GRB980519 Secondary Standards
  93. BATSE on-board GRB trigger change
  94. GRB 980519 Optical Observations
  95. GRB 980519
  96. GRB980519 optical observations
  97. GRB 980519 Optical Observations
  98. GRB980519 BATSE Observations
  99. GRB980519 Optical Observations
  100. GRB980519 Optical Observations

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