ASTROSAT CZTI

Data Quality Report

Orbit 56201

Creation date: 2026-02-16T16:46:01.335338
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_083T04_9000006550_56201cztM0_level2.fits modeM0/AS1A14_083T04_9000006550_56201cztM0_level2_quad_clean.evt
Size (bytes)597,775,68093,202,560
Size570.1 MB 88.9 MB
Events in quadrant A8,021,432537,230
Events in quadrant B3,290,852702,698
Events in quadrant C5,546,762566,635
Events in quadrant D4,771,151568,177

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0150
D0150

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0284102
B0140383
C0210402
D0185232

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6416146022.755611%
B64151732.696804%
C641584813.219018%
D64153435.346843%

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 7586 6416 1242 1242 16.37% 19.36%
B 7585 6415 19 19 0.25% 0.30%
C 7585 6416 617 617 8.13% 9.62%
D 7585 6416 231 231 3.05% 3.60%

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 15 32 2662013 16173.38 668 653 164.6
A 8 176 1123060 6820.99 668 653 164.6
A 12 115 895599 5438.69 668 653 164.6
B 4 156 143547 953.55 715 691 149.8
B 5 185 85926 568.94 715 691 149.8
B 10 247 47804 314.48 715 691 149.8
C 12 254 2112676 11565.55 668 661 182.6
C 12 252 669243 3661.2 668 661 182.6
C 6 223 48808 263.66 668 661 182.6
D 11 129 756087 3855.59 696 664 195.9
D 6 239 328360 1672.52 696 664 195.9
D 2 249 301635 1536.12 696 664 195.9

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