ASTROSAT CZTI

Data Quality Report

Orbit 54791

Creation date: 2025-11-13T21:44:35.613142
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_103T01_9000006524_54791cztM0_level2.fits modeM0/AS1A14_103T01_9000006524_54791cztM0_level2_quad_clean.evt
Size (bytes)1,631,030,400380,620,800
Size1.5 GB 363.0 MB
Events in quadrant A11,643,2552,688,865
Events in quadrant B12,138,7752,710,957
Events in quadrant C21,345,4292,179,212
Events in quadrant D13,446,8412,345,194

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04720
B04720
C04720
D04720

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0527758
B0537199
C07985110
D05764423

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0430
B0430
C0430
D0430

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A232875772.477777%
B232885322.284438%
C23289253810.897849%
D232837383.169695%

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 27419 23293 203 203 0.74% 0.87%
B 27420 23292 135 135 0.49% 0.58%
C 27420 23294 2130 2130 7.77% 9.14%
D 27420 23291 512 512 1.87% 2.20%

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 0 8 543530 791.1 2610 2548 683.8
A 13 248 505671 735.74 2610 2548 683.8
A 0 117 119398 170.88 2610 2548 683.8
B 2 249 746704 1384.68 2494 2409 537.5
B 5 185 650081 1204.92 2494 2409 537.5
B 4 81 254625 469.22 2494 2409 537.5
C 9 38 8323715 12419.35 2376 2351 670.0
C 13 3 1772636 2642.09 2376 2351 670.0
C 14 254 712752 1060.25 2376 2351 670.0
D 15 94 704214 943.72 2509 2386 743.7
D 3 12 643542 862.14 2509 2386 743.7
D 3 224 421816 563.99 2509 2386 743.7

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