ASTROSAT CZTI

Data Quality Report

Orbit 54551

Creation date: 2025-10-28T16:55:16.751867
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_127T09_9000006520_54551cztM0_level2.fits modeM0/AS1A14_127T09_9000006520_54551cztM0_level2_quad_clean.evt
Size (bytes)559,031,040107,052,480
Size533.1 MB 102.1 MB
Events in quadrant A3,854,023711,938
Events in quadrant B4,066,878763,838
Events in quadrant C7,357,214602,824
Events in quadrant D4,817,665627,010

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0171880
B0175840
C0273810
D0199110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01540
C01540
D01540

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A77001061.376623%
B7701750.973899%
C7701109614.231918%
D77011942.519153%

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 7700 7700 111 111 1.44% 1.44%
B 7701 7701 38 38 0.49% 0.49%
C 7701 7701 1120 1120 14.54% 14.54%
D 7701 7701 221 221 2.87% 2.87%

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 11 3 470296 2314.36 816 797 202.9
A 3 110 65799 320.42 816 797 202.9
A 4 249 44618 216.01 816 797 202.9
B 8 234 384257 2198.65 809 780 174.4
B 0 213 190308 1086.65 809 780 174.4
B 10 14 93917 534.0 809 780 174.4
C 12 252 1887398 9320.35 741 735 202.4
C 12 254 1467296 7244.99 741 735 202.4
C 13 3 399387 1969.39 741 735 202.4
D 3 12 636962 2885.91 781 749 220.5
D 6 239 503342 2279.8 781 749 220.5
D 6 42 173321 782.8 781 749 220.5

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