ASTROSAT CZTI

Data Quality Report

Orbit 55474

Creation date: 2025-12-30T10:17:52.649501
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A14_099T01_9000006536_55474cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55474cztM0_level2_quad_clean.evt
Size (bytes)447,099,84096,906,240
Size426.4 MB 92.4 MB
Events in quadrant A3,862,006640,987
Events in quadrant B3,269,715690,925
Events in quadrant C4,277,456593,737
Events in quadrant D4,636,283556,084

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0161
C0160
D0172

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0159505
B0142868
C01742312
D0182707

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64902784.283513%
B64891772.727693%
C64893435.285868%
D64904376.733436%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 7641 6490 159 159 2.08% 2.45%
B 7641 6489 56 56 0.73% 0.86%
C 7641 6489 310 310 4.06% 4.78%
D 7641 6490 361 361 4.72% 5.56%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 0 8 541974 3064.56 716 698 176.6
A 3 78 361562 2043.11 716 698 176.6
A 6 179 48727 271.93 716 698 176.6
B 5 172 189062 1267.68 704 678 148.6
B 0 171 128977 863.35 704 678 148.6
B 0 199 39709 262.65 704 678 148.6
C 9 38 1289233 6901.52 683 676 186.7
C 13 3 152673 814.1 683 676 186.7
C 12 2 64452 341.58 683 676 186.7
D 11 129 1112720 5774.92 682 651 192.6
D 9 102 338013 1751.91 682 651 192.6
D 2 249 133003 687.3 682 651 192.6

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter