ASTROSAT CZTI

Data Quality Report

Orbit 20180425_G08_076T01_9000002056_level2

Creation date: 2025-11-22T01:05:48.920052
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_076T01_9000002056cztM0_level2.fits modeM0/AS1G08_076T01_9000002056cztM0_level2_quad_clean.evt
Size (bytes)279,999,360271,333,440
Size267.0 MB 258.8 MB
Events in quadrant A1,675,5641,541,259
Events in quadrant B1,626,3881,552,414
Events in quadrant C1,679,5941,608,642
Events in quadrant D1,429,4641,445,882

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0330
B0330
C0330
D0330

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0618510
B0631220
C0624020
D0762160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06140
B06140
C06140
D06140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A300963171.053296%
B300964191.392212%
C300962210.734317%
D300968022.664806%

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 33360 30091 0 0 0.00% 0.00%
B 33360 30092 0 0 0.00% 0.00%
C 33360 30094 0 0 0.00% 0.00%
D 33361 30080 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 1584 10.63 436 409 110.5
A 7 110 1368 8.68 436 409 110.5
A 9 19 1305 8.11 436 409 110.5
B 2 9 1407 11.49 428 407 87.1
B 2 8 1059 7.49 428 407 87.1
B 14 254 1058 7.48 428 407 87.1
C 1 81 1281 7.43 442 411 117.1
C 1 80 1242 7.1 442 411 117.1
C 12 241 1240 7.08 442 411 117.1
D 4 246 1171 7.04 407 368 114.0
D 3 14 1115 6.55 407 368 114.0
D 6 231 1087 6.31 407 368 114.0

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