ASTROSAT CZTI

Data Quality Report

Orbit 55770

Creation date: 2026-01-19T14:56:08.337806
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_099T04_9000006540_55770cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55770cztM0_level2_quad_clean.evt
Size (bytes)645,831,36097,614,720
Size615.9 MB 93.1 MB
Events in quadrant A8,208,593548,480
Events in quadrant B3,651,598716,924
Events in quadrant C4,370,964639,800
Events in quadrant D7,113,358545,223

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0292940
B0161160
C0183890
D0262310

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7250149920.675862%
B7250670.924138%
C72511922.647911%
D725192712.784444%

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 7250 7250 1371 1371 18.91% 18.91%
B 7250 7250 38 38 0.52% 0.52%
C 7251 7251 162 162 2.23% 2.23%
D 7251 7251 963 963 13.28% 13.28%

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 7 64 3455597 20035.96 693 677 172.4
A 15 32 1387695 8043.67 693 677 172.4
A 8 192 263516 1524.27 693 677 172.4
B 7 0 324156 2022.19 741 715 159.9
B 5 172 179672 1118.86 741 715 159.9
B 0 199 70313 435.14 741 715 159.9
C 9 38 1229894 6150.34 728 719 199.9
C 12 250 91339 453.43 728 719 199.9
C 10 22 78090 387.14 728 719 199.9
D 11 129 3144436 16025.45 693 662 196.2
D 7 70 855795 4359.06 693 662 196.2
D 8 240 167742 851.69 693 662 196.2

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