ASTROSAT CZTI

Data Quality Report

Orbit 51638

Creation date: 2025-04-15T16:07:54.382138
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/AS1A13_037T05_9000006460_51638cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51638cztM0_level2_quad_clean.evt
Size (bytes)2,328,318,720349,090,560
Size2.2 GB 332.9 MB
Events in quadrant A19,820,2782,249,302
Events in quadrant B21,571,1472,396,157
Events in quadrant C22,959,5482,151,487
Events in quadrant D19,862,2472,010,499

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0768813
B0817893
C0859533
D0773573

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05220
B05220
C05220
D05220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2560220738.097024%
B25602269110.510898%
C2560222178.659480%
D2560321768.499004%

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 27282 25606 1112 1112 4.08% 4.34%
B 27282 25606 1868 1868 6.85% 7.30%
C 27282 25606 1895 1895 6.95% 7.40%
D 27283 25607 1874 1874 6.87% 7.32%

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 2849888 4351.86 2675 2610 654.3
A 12 250 2843021 4341.36 2675 2610 654.3
A 12 3 580218 882.83 2675 2610 654.3
B 10 44 3978515 7084.82 2636 2544 561.2
B 5 172 2404390 4279.87 2636 2544 561.2
B 10 41 691207 1227.13 2636 2544 561.2
C 5 250 8151082 11412.76 2622 2610 714.0
C 15 189 994325 1389.0 2622 2610 714.0
C 15 147 861636 1203.15 2622 2610 714.0
D 7 60 2669553 3714.36 2584 2491 718.0
D 3 12 1963809 2731.49 2584 2491 718.0
D 1 3 977118 1357.34 2584 2491 718.0

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