ASTROSAT CZTI

Data Quality Report

Orbit 55971

Creation date: 2026-02-06T03:49:48.467198
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_066T02_9000006546_55971cztM0_level2.fits modeM0/AS1A14_066T02_9000006546_55971cztM0_level2_quad_clean.evt
Size (bytes)690,658,56082,926,720
Size658.7 MB 79.1 MB
Events in quadrant A13,185,176298,429
Events in quadrant B3,464,975660,377
Events in quadrant C3,594,324583,585
Events in quadrant D4,810,399509,546

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0436401
B0147841
C0157021
D0190861

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6585372356.537585%
B6585741.123766%
C65861291.958700%
D65866109.262071%

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 7565 6586 3674 3674 48.57% 55.78%
B 7565 6586 20 20 0.26% 0.30%
C 7566 6587 175 175 2.31% 2.66%
D 7566 6587 550 550 7.27% 8.35%

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 10125448 75987.72 534 520 133.2
A 7 64 378089 2833.66 534 520 133.2
A 15 32 376183 2819.35 534 520 133.2
B 0 199 212328 1442.62 688 662 146.7
B 2 249 150485 1021.13 688 662 146.7
B 0 231 101633 688.17 688 662 146.7
C 13 3 464594 2501.34 675 669 185.5
C 12 252 206853 1111.68 675 669 185.5
C 15 199 119809 642.37 675 669 185.5
D 7 96 1726611 9401.25 638 609 183.6
D 6 42 250518 1361.21 638 609 183.6
D 11 129 115366 625.06 638 609 183.6

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