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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"

37565 results found.

  1. GRB030501 localized by INTEGRAL
  2. GRB030425: CrAO optical observation
  3. IPN triangulation of GRB030429 (annulus)
  4. IPN triangulation of GRB030428 (two large error boxes)
  5. GRB 030329 Oprical observations in Rozhen observatory
  6. GRB 030429: ROTSE-III observations
  7. GRB 030324: Radio Observations
  8. GRB030329 observed as a sudden ionospheric disturbance (SID)
  9. IPN triangulation of GRB030426 (annulus)
  10. SNeIa AS THE POSSIBLE PROGENITORS OF SHORT-DURATION GRBs.
  11. IPN triangulation of GRB030425 (single error box)
  12. GRB 030329, the review of the sky area in plate archive (1950-1998)
  13. GRB 030329: Spectral Evolution of SN 2003dh
  14. Optical Observations of GRB 030418 with Magellan
  15. GRB 030329: optical spectropolarimetry at VLT
  16. IPN triangulation of GRB030422C (annulus)
  17. IPN triangulation of GRB030422B (annulus)
  18. GRB 030329: wide-field photograph by R. Tamura 1 hr after the burst
  19. GRB030329: optical polarization
  20. IPN triangulation of GRB030422 (two large error boxes)
  21. GRB 030329 3.5 and 6 cm radio observations at RTF-32 telescope
  22. IPN triangulation of GRB030421 (annulus)
  23. MASTER:optical observations GRB030418
  24. MASTER:optical observations probable GRB030414
  25. GRB030329: 444 AAVSO Measurements
  26. IPN triangulation of GRB030419 (annulus)
  27. MASTER:optical observations GRB030416
  28. ROTSE-III prompt optical detections of GRB 030418
  29. GRB030418: Upper limits from recent and historical observations.
  30. GRB030418: Kiso near infrared observations
  31. GRB 030418: Optical afterglow
  32. GRB 030418: Finder for afterglow candidate
  33. GRB 030418: Optical afterglow candidate
  34. GRB 030329 OT position
  35. OT GRB 030329: early UBVRcIc spectral evolution
  36. GRB030329, UBVRI polarimetry, R-polarization
  37. GRB 030329: SARA Optical Observations
  38. OT GRB 030329: early spectrum
  39. GRB030329: VR Photometry at TNG
  40. GRB030324: Candidate Optical Afterglow (Erratum)
  41. GRB030324: Candidate Optical Afterglow
  42. IPN triangulation of GRB030414 (small error box)
  43. GRB 030413: Optical Observations
  44. GRB 030329 Rc observations
  45. IPN triangulation of GRB030413 (small error box)
  46. IPN triangulation of GRB030410 (annulus)
  47. Superluminal motion in GRB 030329 (Correction)
  48. Superluminal motion in GRB 030329
  49. GRB 030329 and SN 2003dh
  50. GRB030329, optical position
  51. GRB 030329 VLBA Observations
  52. IPN triangulation of GRB030406 (small error box)
  53. IPN triangulation of GRB050403 (small error box)
  54. IPN triangulation of GRB030403 (annulus)
  55. GRB 030329: BVRI photometry at Asiago
  56. GRB 030329, light curve flattens
  57. GRB 030329: VLT V-band photometry
  58. If the SN/GRB connection confirmed
  59. GRB 030329: Supernova Confirmed
  60. GRB030329: RTT150 optical observations
  61. GRB030329: Near Infrared Observations at Gunma
  62. GRB030329: HET spectroscopic monitoring
  63. Kiso observation of the GRB030329 at April 6
  64. GRB 030329, color evolution
  65. GRB030328, UBVRcIc field photometry
  66. GRB 030329 Optical observations
  67. GRB 030329, color evolution
  68. GRB 030329: possible color change
  69. GRB030329: RTT150 optical observations
  70. GRB 030329: Supernova Spectrum Emerging
  71. GRB030329: Kiso B and R band observations
  72. GRB030329: RTT150 optical observation
  73. GRB030329: More AAVSO VR obs
  74. GRB030328: R upper limit after 6 hours by MASTER
  75. GRB 030329: BV photographic observations
  76. GRB 030329: SARA Optical Observations
  77. GRB 030329: SARA Optical Observations
  78. GRB030329, fading resumes
  79. GRB 030329, BVRI photometry
  80. SDSS 0.5m PT observations of GRB030329 (correction)
  81. SDSS 0.5m PT observations of GRB030329
  82. GRB 030329, Optical observations
  83. GRB 030329, nearby galaxies
  84. GRB030329, cessation of fading
  85. GRB030329 Radio 23/43/90 GHz observations at Nobeyama
  86. GRB 030329: Sub-millimeter detection
  87. GRB 030329: SARA Optical Observations
  88. GRB 030329: SARA Optical Observations
  89. OT GRB light curves and SN predictions
  90. GRB030329, optical observation
  91. GRB030329, new UBVRcIc field photometry
  92. GRB 030329, light curve and SN prediction
  93. GRB030329: optical observations at Tokyo Tech
  94. GRB 030329: optical observations
  95. GRB030329: multiple re-brightening phases
  96. GRB 030329, BRI photometry
  97. GRB 030329 , SPM optical observations
  98. GRB 030329: Radio observations at GMRT
  99. Further AAVSO V,B,R observations of GRB030329
  100. GRB 030329: Additional Mt. Laguna Optical Observations

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