ASTROSAT CZTI

Data Quality Report

Orbit 55979

Creation date: 2026-02-06T06:55:51.643554
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_066T02_9000006546_55979cztM0_level2.fits modeM0/AS1A14_066T02_9000006546_55979cztM0_level2_quad_clean.evt
Size (bytes)552,280,32086,123,520
Size526.7 MB 82.1 MB
Events in quadrant A10,416,855402,050
Events in quadrant B3,113,077640,252
Events in quadrant C3,000,230573,179
Events in quadrant D3,414,092543,994

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0353681
B0139201
C0138461
D0146831

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6423251439.140589%
B6423871.354507%
C6423630.980850%
D64241011.572229%

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 7248 6423 2274 2274 31.37% 35.40%
B 7248 6423 10 10 0.14% 0.16%
C 7248 6424 22 22 0.30% 0.34%
D 7249 6424 57 57 0.79% 0.89%

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 12 115 3938916 26969.24 580 564 146.0
A 4 249 3532852 24188.57 580 564 146.0
A 7 64 408022 2790.21 580 564 146.0
B 2 249 159610 1096.79 672 646 144.9
B 0 199 115911 795.28 672 646 144.9
B 0 213 82325 563.55 672 646 144.9
C 2 12 126106 689.24 661 654 182.0
C 14 254 86761 473.08 661 654 182.0
C 6 223 56411 306.33 661 654 182.0
D 11 129 264000 1389.62 665 636 189.5
D 7 129 155519 817.23 665 636 189.5
D 2 249 135439 711.28 665 636 189.5

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