ASTROSAT CZTI

Data Quality Report

Orbit 20220131_A11_047T07_9000004892_level2

Creation date: 2025-12-31T17:04:34.347226
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/AS1A11_047T07_9000004892cztM0_level2.fits modeM0/AS1A11_047T07_9000004892cztM0_level2_quad_clean.evt
Size (bytes)245,592,000233,242,560
Size234.2 MB 222.4 MB
Events in quadrant A1,540,0341,421,206
Events in quadrant B1,452,4221,393,423
Events in quadrant C1,539,7341,391,790
Events in quadrant D1,289,5741,240,112

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0498640
B0646660
C0520100
D0754950

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01190
B01190
C01190
D01190

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04840
B04840
C04840
D04840

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A23477530.225753%
B234779233.931507%
C234771320.562252%
D234779484.037995%

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 35464 23477 0 0 0.00% 0.00%
B 35464 23466 0 0 0.00% 0.00%
C 35464 23477 0 0 0.00% 0.00%
D 35464 23463 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 7 110 1274 9.12 402 383 97.7
A 9 19 1271 9.09 402 383 97.7
A 0 29 1221 8.58 402 383 97.7
B 2 9 1244 11.24 385 369 77.9
B 3 80 1124 9.7 385 369 77.9
B 2 8 1045 8.68 385 369 77.9
C 1 81 1296 8.71 408 387 104.4
C 1 80 1263 8.39 408 387 104.4
C 3 202 1180 7.59 408 387 104.4
D 6 231 978 6.5 370 340 98.2
D 10 189 951 6.22 370 340 98.2
D 6 38 949 6.2 370 340 98.2

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