ASTROSAT CZTI

Data Quality Report

Orbit 20211123_T04_072T01_9000004780_level2

Creation date: 2025-12-30T00:17:48.190130
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/AS1T04_072T01_9000004780cztM0_level2.fits modeM0/AS1T04_072T01_9000004780cztM0_level2_quad_clean.evt
Size (bytes)349,951,680324,204,480
Size333.7 MB 309.2 MB
Events in quadrant A2,178,4701,960,149
Events in quadrant B2,000,8141,828,434
Events in quadrant C2,076,7981,836,861
Events in quadrant D1,754,1101,605,522

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07680
B07680
C07680
D07680

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0770850
B01000270
C0860570
D01301880

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01230

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A37669640.169901%
B3766921835.795216%
C376694551.207890%
D3766920945.558948%

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 47291 36746 0 0 0.00% 0.00%
B 47291 36726 0 0 0.00% 0.00%
C 47291 36742 0 0 0.00% 0.00%
D 47291 36693 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 9 19 1793 8.8 568 531 143.4
A 0 29 1751 8.5 568 531 143.4
A 7 110 1749 8.49 568 531 143.4
B 2 9 1820 12.21 532 506 107.6
B 3 80 1540 9.61 532 506 107.6
B 2 8 1455 8.82 532 506 107.6
C 3 187 1469 6.83 551 517 139.4
C 3 158 1381 6.2 551 517 139.4
C 7 233 1368 6.1 551 517 139.4
D 3 14 1315 6.4 502 458 134.0
D 6 38 1259 5.98 502 458 134.0
D 6 231 1259 5.98 502 458 134.0

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