ASTROSAT CZTI

Data Quality Report

Orbit 55894

Creation date: 2026-01-27T01:38:09.575553
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_030T02_9000006544_55894cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55894cztM0_level2_quad_clean.evt
Size (bytes)425,384,64096,840,000
Size405.7 MB 92.4 MB
Events in quadrant A3,493,299634,742
Events in quadrant B3,390,434678,913
Events in quadrant C3,605,604597,630
Events in quadrant D4,739,041557,030

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0152732
B0150612
C0157852
D0187323

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66561251.878005%
B66561301.953125%
C66571922.884182%
D66563915.874399%

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 7696 6657 76 76 0.99% 1.14%
B 7696 6657 70 70 0.91% 1.05%
C 7697 6658 115 115 1.49% 1.73%
D 7696 6657 342 342 4.44% 5.14%

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 439232 2525.72 699 680 173.6
A 0 8 96157 549.87 699 680 173.6
A 3 14 65644 374.14 699 680 173.6
B 0 153 396098 2669.27 690 664 148.1
B 0 199 92996 623.26 690 664 148.1
B 0 143 56288 375.47 690 664 148.1
C 12 252 614616 3314.2 676 669 185.2
C 15 199 272704 1468.5 676 669 185.2
C 6 223 18508 96.3 676 669 185.2
D 11 129 655716 3493.8 670 644 187.5
D 3 12 315808 1680.91 670 644 187.5
D 2 31 289929 1542.89 670 644 187.5

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