ASTROSAT CZTI

Data Quality Report

Orbit 55331

Creation date: 2025-12-20T16:17:22.733241
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_009T01_9000006534_55331cztM0_level2.fits modeM0/AS1A14_009T01_9000006534_55331cztM0_level2_quad_clean.evt
Size (bytes)476,746,56094,204,800
Size454.7 MB 89.8 MB
Events in quadrant A5,016,445594,416
Events in quadrant B2,991,452668,262
Events in quadrant C5,506,738590,700
Events in quadrant D3,633,930550,669

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0193082
B0136892
C0209832
D0156022

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0180
D0180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64274276.643846%
B6427610.949121%
C64272293.563093%
D64272423.765365%

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 7512 6428 433 433 5.76% 6.74%
B 7512 6428 14 14 0.19% 0.22%
C 7512 6428 214 214 2.85% 3.33%
D 7512 6428 201 201 2.68% 3.13%

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 12 115 1122903 6748.0 667 651 166.3
A 3 78 799598 4803.99 667 651 166.3
A 3 14 208587 1250.3 667 651 166.3
B 0 199 99018 687.77 673 649 143.0
B 10 247 70032 485.11 673 649 143.0
B 5 185 65420 452.86 673 649 143.0
C 9 38 2564516 14073.3 661 656 182.2
C 12 249 215140 1177.33 661 656 182.2
C 14 254 41063 221.8 661 656 182.2
D 11 176 607585 3263.51 655 626 186.0
D 2 62 81773 436.31 655 626 186.0
D 11 129 81553 435.13 655 626 186.0

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