ASTROSAT CZTI

Data Quality Report

Orbit 20181014_C04_008T01_9000002434_level2

Creation date: 2025-11-25T05:32:15.746331
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/AS1C04_008T01_9000002434cztM0_level2.fits modeM0/AS1C04_008T01_9000002434cztM0_level2_quad_clean.evt
Size (bytes)327,499,200352,831,680
Size312.3 MB 336.5 MB
Events in quadrant A2,001,9202,179,823
Events in quadrant B1,929,8942,202,906
Events in quadrant C1,982,7602,099,553
Events in quadrant D1,715,4841,915,465

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0748100
B0771340
C0728440
D0773410

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06780
B06780
C06780
D06780

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0700
B0700
C0700
D0700

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A333124791.437920%
B333125371.612032%
C333125151.545989%
D333127652.296470%

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 40202 33306 0 0 0.00% 0.00%
B 40202 33306 0 0 0.00% 0.00%
C 40202 33306 0 0 0.00% 0.00%
D 40202 33292 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 14 188 2168 12.98 519 487 129.5
A 0 29 2007 11.74 519 487 129.5
A 14 204 1818 10.28 519 487 129.5
B 2 9 1518 10.29 509 486 100.3
B 2 8 1325 8.37 509 486 100.3
B 14 254 1291 8.03 509 486 100.3
C 1 81 1591 8.02 523 487 137.7
C 1 80 1556 7.76 523 487 137.7
C 12 241 1382 6.5 523 487 137.7
D 6 38 1238 5.93 489 443 134.0
D 10 189 1230 5.87 489 443 134.0
D 6 231 1222 5.81 489 443 134.0

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