ASTROSAT CZTI

Data Quality Report

Orbit 20210715_A10_101T01_9000004546_level2

Creation date: 2025-12-27T10:21:00.725038
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/AS1A10_101T01_9000004546cztM0_level2.fits modeM0/AS1A10_101T01_9000004546cztM0_level2_quad_clean.evt
Size (bytes)335,563,200267,762,240
Size320.0 MB 255.4 MB
Events in quadrant A2,144,5181,560,939
Events in quadrant B1,989,0921,536,920
Events in quadrant C1,992,9561,422,693
Events in quadrant D1,814,0931,365,527

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0681980
B0988760
C0755700
D0761170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06580
B06580
C06580
D06580

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02130
B02130
C02130
D02130

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A323443431.060475%
B323436371.969514%
C3233811493.553095%
D323462300.711062%

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 38123 32321 0 0 0.00% 0.00%
B 38123 32324 0 0 0.00% 0.00%
C 38123 32321 0 0 0.00% 0.00%
D 38123 32324 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 1725 8.79 558 526 136.4
A 7 110 1698 8.59 558 526 136.4
A 9 19 1631 8.1 558 526 136.4
B 2 9 1604 10.5 525 504 104.7
B 5 128 1356 8.13 525 504 104.7
B 2 8 1319 7.78 525 504 104.7
C 12 241 1395 6.64 528 495 135.6
C 9 209 1388 6.58 528 495 135.6
C 3 187 1350 6.3 528 495 135.6
D 10 189 1286 5.97 517 474 136.0
D 7 3 1284 5.96 517 474 136.0
D 6 67 1283 5.95 517 474 136.0

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