ASTROSAT CZTI

Data Quality Report

Orbit 57251

Creation date: 2026-04-30T19:08:49.836474
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_070T08_9000006568_57251cztM0_level2.fits modeM0/AS1A14_070T08_9000006568_57251cztM0_level2_quad_clean.evt
Size (bytes)490,852,80099,803,520
Size468.1 MB 95.2 MB
Events in quadrant A3,737,353672,968
Events in quadrant B5,579,520639,232
Events in quadrant C5,032,920609,915
Events in quadrant D3,262,540600,319

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0163452
B0218602
C0202922
D0152122

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7171520.725143%
B717198513.735881%
C71714125.745363%
D7171330.460187%

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 8771 7173 23 23 0.26% 0.32%
B 8771 7173 773 773 8.81% 10.78%
C 8771 7173 341 341 3.89% 4.75%
D 8771 7173 20 20 0.23% 0.28%

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 733351 3992.1 749 728 183.5
A 4 13 64280 346.3 749 728 183.5
A 10 251 15401 79.95 749 728 183.5
B 5 185 2158652 14420.51 707 682 149.6
B 4 201 275557 1836.84 707 682 149.6
B 10 16 118672 788.46 707 682 149.6
C 15 224 2019186 10505.9 709 702 192.1
C 14 254 136619 707.43 709 702 192.1
C 12 252 32434 165.16 709 702 192.1
D 2 120 107275 520.5 723 691 204.8
D 3 224 93399 452.73 723 691 204.8
D 5 173 56637 273.21 723 691 204.8

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