ASTROSAT CZTI

Data Quality Report

Orbit 20181214_T03_032T01_9000002564_level2

Creation date: 2025-11-26T13:54:34.251817
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/AS1T03_032T01_9000002564cztM0_level2.fits modeM0/AS1T03_032T01_9000002564cztM0_level2_quad_clean.evt
Size (bytes)143,654,400100,800,000
Size137.0 MB 96.1 MB
Events in quadrant A924,772568,664
Events in quadrant B880,246565,288
Events in quadrant C887,384534,102
Events in quadrant D763,488488,317

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0330
B0330
C0330
D0330

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02640
B02640
C02640
D02640

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0280590
B0280950
C0284830
D0361090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A129501671.289575%
B129501751.351351%
C129502051.583012%
D129504793.698842%

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 15474 12947 0 0 0.00% 0.00%
B 15474 12948 0 0 0.00% 0.00%
C 15473 12948 0 0 0.00% 0.00%
D 15474 12947 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 29 900 11.23 241 228 59.8
A 7 110 728 8.36 241 228 59.8
A 15 236 687 7.67 241 228 59.8
B 2 9 661 9.23 232 224 47.4
B 5 225 583 7.58 232 224 47.4
B 3 17 576 7.43 232 224 47.4
C 1 81 656 7.15 234 221 60.8
C 1 80 635 6.81 234 221 60.8
C 3 126 618 6.53 234 221 60.8
D 6 231 574 6.46 218 200 57.9
D 3 14 568 6.36 218 200 57.9
D 15 46 549 6.03 218 200 57.9

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