ASTROSAT CZTI

Data Quality Report

Orbit 20180508_G08_028T01_9000002080_level2

Creation date: 2025-11-22T06:00:03.366758
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/AS1G08_028T01_9000002080cztM0_level2.fits modeM0/AS1G08_028T01_9000002080cztM0_level2_quad_clean.evt
Size (bytes)382,936,320306,999,360
Size365.2 MB 292.8 MB
Events in quadrant A2,402,7021,780,515
Events in quadrant B2,276,5661,749,579
Events in quadrant C2,340,3821,674,858
Events in quadrant D2,043,5561,556,637

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0781160
B0825790
C0781950
D0875850

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0850
B0850
C0850
D0850

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07500
B07500
C07500
D07500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A369134491.216374%
B369136791.839460%
C369133160.856067%
D369137652.072441%

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 45177 36912 0 0 0.00% 0.00%
B 45177 36912 0 0 0.00% 0.00%
C 45177 36912 0 0 0.00% 0.00%
D 45177 36901 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 0 29 2259 10.99 625 588 152.1
A 7 110 1898 8.61 625 588 152.1
A 9 19 1722 7.46 625 588 152.1
B 2 9 1923 11.42 601 576 117.9
B 5 128 1496 7.8 601 576 117.9
B 3 17 1491 7.76 601 576 117.9
C 1 80 1764 7.35 618 579 161.2
C 1 81 1698 6.94 618 579 161.2
C 12 241 1621 6.46 618 579 161.2
D 3 14 1467 6.0 583 533 155.7
D 6 231 1463 5.97 583 533 155.7
D 7 5 1404 5.59 583 533 155.7

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