ASTROSAT CZTI

Data Quality Report

Orbit 51814

Creation date: 2025-04-27T09:26:59.763670
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_090T01_9000006464_51814cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51814cztM0_level2_quad_clean.evt
Size (bytes)512,732,160101,784,960
Size489.0 MB 97.1 MB
Events in quadrant A5,055,965659,221
Events in quadrant B4,091,798716,522
Events in quadrant C4,120,895641,308
Events in quadrant D5,183,394590,605

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0180
C0180
D0180

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0196533
B0168693
C0168113
D0201614

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68021802.646281%
B68022463.616583%
C68022243.293149%
D68013214.719894%

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 7956 6803 121 121 1.52% 1.78%
B 7956 6803 141 141 1.77% 2.07%
C 7956 6803 107 107 1.34% 1.57%
D 7955 6802 230 230 2.89% 3.38%

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 4 175 703622 3825.64 743 725 183.7
A 12 3 497621 2704.44 743 725 183.7
A 15 174 304826 1655.12 743 725 183.7
B 15 54 291803 1853.46 733 707 157.1
B 10 128 200915 1274.76 733 707 157.1
B 4 81 176359 1118.41 733 707 157.1
C 1 3 241032 1188.42 736 730 202.2
C 12 254 167923 826.86 736 730 202.2
C 9 38 159924 787.3 736 730 202.2
D 11 129 1428579 7117.28 718 692 200.6
D 0 18 443645 2207.89 718 692 200.6
D 9 49 130230 645.68 718 692 200.6

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