ASTROSAT CZTI

Data Quality Report

Orbit 50916

Creation date: 2025-02-25T21:58:50.364996
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/AS1C07_001T01_9000006450_50916cztM0_level2.fits modeM0/AS1C07_001T01_9000006450_50916cztM0_level2_quad_clean.evt
Size (bytes)681,739,20077,310,720
Size650.2 MB 73.7 MB
Events in quadrant A10,625,734361,034
Events in quadrant B2,910,425626,773
Events in quadrant C4,557,603536,037
Events in quadrant D6,667,075389,716

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0358381
B0131321
C0176701
D0240102

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6118267443.707094%
B61181512.468127%
C61193475.670861%
D6118170227.819549%

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 7067 6117 2400 2400 33.96% 39.23%
B 7068 6118 12 12 0.17% 0.20%
C 7069 6119 212 212 3.00% 3.46%
D 7068 6118 945 945 13.37% 15.45%

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 4 6387685 45011.23 563 550 141.9
A 14 254 515282 3627.4 563 550 141.9
A 3 130 231090 1624.65 563 550 141.9
B 8 128 70088 503.37 649 626 138.0
B 10 237 38505 274.49 649 626 138.0
B 0 245 37631 268.16 649 626 138.0
C 12 247 779869 4544.11 630 624 171.5
C 4 5 754415 4395.68 630 624 171.5
C 0 145 79732 461.31 630 624 171.5
D 7 45 2867621 18888.91 543 523 151.8
D 2 249 490798 3230.01 543 523 151.8
D 6 42 473614 3116.8 543 523 151.8

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