ASTROSAT CZTI

Data Quality Report

Orbit 20220510_A09_121T01_9000005136_level2

Creation date: 2026-01-02T14:33:39.761553
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/AS1A09_121T01_9000005136cztM0_level2.fits modeM0/AS1A09_121T01_9000005136cztM0_level2_quad_clean.evt
Size (bytes)509,353,920485,222,400
Size485.8 MB 462.7 MB
Events in quadrant A3,150,7982,899,866
Events in quadrant B2,943,3142,864,057
Events in quadrant C3,023,1602,750,629
Events in quadrant D2,637,9002,509,749

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02040
B02040
C02040
D02040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01150080
B01337840
C01220590
D01397590

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010960
B010960
C010960
D010960

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A534804780.893792%
B5348014932.791698%
C534809601.795064%
D5348016663.115183%

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 74004 53474 0 0 0.00% 0.00%
B 74004 53467 0 0 0.00% 0.00%
C 74004 53443 0 0 0.00% 0.00%
D 74004 53422 0 0 0.00% 0.00%

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 7 110 2569 8.72 824 776 205.6
A 9 19 2563 8.69 824 776 205.6
A 0 29 2546 8.61 824 776 205.6
B 2 9 2476 11.22 782 746 154.2
B 3 80 2329 10.27 782 746 154.2
B 5 128 2096 8.75 782 746 154.2
C 1 81 2504 8.49 800 749 206.6
C 1 80 2440 8.18 800 749 206.6
C 3 187 2069 6.39 800 749 206.6
D 7 3 2009 6.62 755 690 199.1
D 4 160 1966 6.41 755 690 199.1
D 10 113 1959 6.37 755 690 199.1

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