ASTROSAT CZTI

Data Quality Report

Orbit 56458

Creation date: 2026-03-06T02:08:11.070188
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_060T01_9000006556_56458cztM0_level2.fits modeM0/AS1A14_060T01_9000006556_56458cztM0_level2_quad_clean.evt
Size (bytes)909,273,600124,836,480
Size867.2 MB 119.1 MB
Events in quadrant A9,961,777707,873
Events in quadrant B9,238,327836,590
Events in quadrant C6,363,359812,557
Events in quadrant D7,366,362769,218

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0360192
B0341432
C0256822
D0284443

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01920
B01920
C01920
D01920

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9419196120.819620%
B9420137214.564756%
C94204865.159236%
D94194064.310436%

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 10894 9421 1886 1886 17.31% 20.02%
B 10895 9422 844 844 7.75% 8.96%
C 10895 9422 469 469 4.30% 4.98%
D 10894 9421 435 435 3.99% 4.62%

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 3 4717095 20505.17 927 906 230.0
A 12 194 636277 2762.48 927 906 230.0
A 0 8 381854 1656.3 927 906 230.0
B 5 172 4368544 21149.99 958 923 206.5
B 4 206 426448 2060.58 958 923 206.5
B 0 63 299401 1445.37 958 923 206.5
C 12 254 1624868 6107.02 971 961 265.9
C 12 252 292097 1094.87 971 961 265.9
C 13 3 262024 981.78 971 961 265.9
D 9 49 1320526 4836.36 966 922 272.9
D 12 4 1164123 4263.14 966 922 272.9
D 8 129 189269 690.29 966 922 272.9

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