ASTROSAT CZTI

Data Quality Report

Orbit 20210710_T04_021T01_9000004526_level2

Creation date: 2025-12-27T10:00:43.858357
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_021T01_9000004526cztM0_level2.fits modeM0/AS1T04_021T01_9000004526cztM0_level2_quad_clean.evt
Size (bytes)319,812,480233,133,120
Size305.0 MB 222.3 MB
Events in quadrant A2,082,4141,348,946
Events in quadrant B1,885,8241,271,365
Events in quadrant C1,930,3841,238,943
Events in quadrant D1,756,5801,169,506

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0639950
B0954330
C0765240
D0773520

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0710
B0710
C0710
D0710

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06060
B05990
C06040
D06040

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A295585161.745720%
B2950813934.720754%
C2951215075.106397%
D295256952.353937%

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 38059 29664 0 0 0.00% 0.00%
B 38059 29640 0 0 0.00% 0.00%
C 38059 29636 0 0 0.00% 0.00%
D 38059 29645 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 2021 11.49 542 516 131.0
A 7 110 1605 8.32 542 516 131.0
A 0 30 1543 7.84 542 516 131.0
B 2 9 1504 10.33 501 482 98.9
B 5 255 1288 8.15 501 482 98.9
B 5 128 1249 7.76 501 482 98.9
C 12 241 1328 6.57 511 483 128.6
C 7 111 1312 6.45 511 483 128.6
C 3 187 1285 6.24 511 483 128.6
D 10 189 1318 6.56 502 463 130.3
D 4 246 1283 6.29 502 463 130.3
D 10 113 1243 5.99 502 463 130.3

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