ASTROSAT CZTI

Data Quality Report

Orbit 20180726_G08_037T01_9000002256_level2

Creation date: 2025-11-23T17:53:04.673661
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/AS1G08_037T01_9000002256cztM0_level2.fits modeM0/AS1G08_037T01_9000002256cztM0_level2_quad_clean.evt
Size (bytes)297,734,400265,921,920
Size283.9 MB 253.6 MB
Events in quadrant A1,848,6861,568,636
Events in quadrant B1,735,6041,560,014
Events in quadrant C1,791,4101,488,848
Events in quadrant D1,576,5401,370,798

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0610
B0610
C0610
D0610

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06140
B06140
C06140
D06140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0638850
B0735980
C0639550
D0639040

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A300334351.448407%
B3003312124.035561%
C300333381.125429%
D300334661.551627%

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 36168 30027 0 0 0.00% 0.00%
B 36168 30003 0 0 0.00% 0.00%
C 36168 30027 0 0 0.00% 0.00%
D 36168 30025 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 1705 10.48 481 452 119.6
A 7 110 1434 8.21 481 452 119.6
A 15 236 1358 7.58 481 452 119.6
B 2 9 1397 10.41 458 438 92.1
B 2 8 1175 8.0 458 438 92.1
B 5 128 1173 7.98 458 438 92.1
C 1 81 1359 7.44 473 441 123.4
C 1 80 1357 7.42 473 441 123.4
C 12 241 1232 6.41 473 441 123.4
D 3 14 1158 6.23 449 409 120.2
D 6 231 1151 6.17 449 409 120.2
D 6 38 1127 5.97 449 409 120.2

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