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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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').
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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

35963 results found.

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

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